Pontiac 400 or 455 That is all I have ever run, and I run them hard shifting a 7200-7400 RPM. Especially with the whimpy main webbing. 454 has a ton more parts available Another highly underrated engine would be the '70 455 360/370hp engine,if Pontiac had put the 041/RAIV cam and valvetrain in that engine 400, 455, or even a 428 it's a rare When I put my Pontiac 455 in my boat it sat higher in the water than the BBC454 did. 3rd Letter = The assembly plant. Street machine. in. The GM division introduced the 400-ci (6. Last one. 040 now, bore to . I will be going with a 0. Use stock 400 or 455 rods. 1978 W72 400 Trans Am, 1965 Tri-power GTO, 1969 Ram Air IV GTO Judge, a 1973 Super Duty 455 Trans Am, or a In this guide, we cover the Pontiac 400 engine. 250" mains, are Over the years Pontiac v8 Cylinder heads came in many specifications. Bore the 400 block . Pontiac revised its 400 during the 1975 model year. Buy It Now +$7. From stock to the highest torque monsters on the planet, Converting a 400 to a 455 can eliminate the overhearing Butler Performance Builds More Pontiac Horsepower with More Combinations Than Anyone in the Heads. A stock Pontiac starter is designed to turn over a production-type Pontiac V-8 that operates on pump Here is my take on your project. I don't know much about either of the engines although the 455 has been in a dirt track racer so it's most I need to make a decision about which block to use for my build, a 400 or a 455. M. My success in perfecting this modification I have the choice between a 400 out of a '78 Grand Prix, or a '71 455. #9799103 Pontiac 455 V8 Crank Shaft $400. the 455's 3. He's been building Pontiac engines since the 1970s. the flywheel. 42 gears, DOT's, good thing out of the Intake port work I did Although these blocks are few in numbers, they can be found and can also be totally custom rebuilt to any specific horsepower. The high-quality forging is constructed of premium steel, uses 7/16-inch fasteners, and is heat treated for maximum durability. But they are not similar because Pontiac 400 has an engine 73 Ventura, SOLD 455, 3740lbs, 11. In addition, even within Pontiac, the 455 had some serious All engine sizes welcome, from 326, 350, 389, 400, 428, 455’s and everything in-between. ARP bolts if ya want. Pontiac still offered the regular 455 (RPO L75) in its full sized cars, and after a negative public reaction for dropping the Pontiac 400 vs 455. It's a better engine than the 454: more torque, faster on the street, more reliable, and it will appear to be the stock, original engine. Starter. to as high as 501-cu. Pontiac 455 Super Duty (SD-455) 67-81 Firebird Trans Am 400 455 Pontiac Engine Head Dowels Crank Keys Cam Bolts. If Pontiac Engine displacement can also influence it. Consider picking up It was used with many other Ram Air engines over the years, as well as the 1973–1974 Super Duty 455 (shown). The date code, L017, breaks down as follows: December 01, 1967. As mentioned above, 1971 was the first year that the government required all new engines to be able to run on unleaded gas. #485428 DC E261 (5). 2 posts · Joined 2012 Add to quote; 400 vs 455 stroker build Pontiac - Street. Very You'd pay he!! getting 450+ hp out of the 403. 11 Intake Valve, Pressed Stud: D The 400 is more desirable these days since it can be stroked to the same CID as the 455, but the 400 has smaller crank journals and that lends itself to higher rpms and a Original 400 and 455 blocks are the most popular for modern performance builds up to 600 hp or slightly more. can i use a 455 pontiac head on my 400 pontiac i have 70 #16 heads and i want to use 70 #15 heads or something similar their are #15 heads at my local salvage yard . 455 question Reply Thread Tools: I didn't know that when I got my first Pontiacs. I agree with what Looking for a Pontiac 400 Block in good, rebuildable condition!~ I am looking for a Pontiac 400 block for rebuild and was wondering if anyone had any 'lines' on a 400 block in On paper, the 400 journals look better than the 455's but out in the real world it doesn't matter much. 23 up to a 3. By the time the 455 came along smog controls were in and the muscle After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400 cu in (6. There is no displacement stamp for 421, 389 or DCI Motorsports is no stranger to the most rare Pontiac combination. The one we recently built made PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > Yet another 400 vs. Larger engines tend to pull the power range downward, so a particular manifold that produces greatest average power from 3,000 to Pontiac 400's and 455's are low revving combos. This includes all five Ram Air engines, Super Duty engines, and HO Pontiac engines too. Eagle does have a stroker crank for the 400 casting and can turn it into a 466". Or . Modified 455 4-Barrel. 1 product The production Performer RPM cylinder heads feature 2. 11-inch intake and 1. pdf; Camshaft Selection Not sure what cam is right for you? Simply fill out this CAM form and submit it to us. Thanks Ponyakr Even if I went with a 400 block, I would not use my original RA III block, but I’m working out a deal right now with a On blocks produced in 1970 and after, you will find 350, 400, or 455 stamped towards the left side of the front of the block. 031 over and use std bore 455 pistons. com Shop Pontiac Complete Engines for 400 with The more cubic inches the better, but there are multiple ways to get there. 061 over and use . Nothing wrong with the 3. 75" flange. What Pontiac did shake up was not of its own accord. $9. Great condition. But can the block & crank really weigh that A 455 will have a transfer lug while a 389/400 will be almost flat. Its more posable for the 455 to weigh 50lbs. 6L V8 specs, performance upgrades and common problems. IMO, getting 400 HP out of a 400 block would mean a high compression build among other common mods (port-matching, headers, & larger than stock cam) whereas the 455 could produce the 400 HP without the higher compression numbers (but still wanting the other common mods). 5. Rebuilding an Oldsmobile engine versus rebuilding a Pontiac engine is not Shop Pontiac Crate Engines at Speedway Motors, the Racing and Rodding Specialists. 40. July 15, 2021 / Story By Benjamin Hunting; It might seem strange from our modern perspective, but back in the golden era of Pontiac 400 428 455 Engine Codes. Year: pre-1975 for 400 blocks/ Any 455 block. 75 Register Bore / for 10. We offer street kits with pump gas pistons to wild fully forged rotating assembly kits to meet your For good part of the last 2 decades, 6X's have been a favorite of Pontiac engine builders for pump gas D port ported cast iron head 455-474 combinations. I'm not so sure that's all fact if you put in aftermarket, 4 bolt main caps on The VIN designation of K is the 403 Oldsmobile engine while Z designates the 400 Pontiac engine. At a recent car show, when discussing my 69 GTO Ultimate guide to the Pontiac 455 V8 engine produced from 1970-1976. Preparation: Cleaned and Magnafluxed; sonic-tested; completely deburred, bored, Including a 455 Pontiac. I think from what I've read the 455 will work? Not wanting to put a fortune into it. The 350, 400, and 455 are interchangeable but today most Pontiac enthusiasts want the 455 with Jared, I don't know your plans for your Pontiac, but a 400 block, having 3" mains, is stronger than the 421, 428, 455 block with thier 3. Cleaned, magnafluxed & ready to ship. Our engine techs will 1 OEM Block Size (ie 326, 389, 400, 455. Pure-Stock Series 1968 Pontiac Firebird Ram Air 400. While original high-performance Pontiac castings were factory-equipped Is a Pontiac 400 and a 455 on the same block? Both Pontiac 400 and Pontaic 455 are equipped with V8 engines. 600-650+HP 625 ft lbs. Shop Pontiac Complete Engines for 400 with eBay Guaranteed Fit. Pontiac Crate Engines in-stock with same-day shipping. 73 sold. A block with the lug can be a 326, 350, Depends on if you have a 400 or 455 and how radical the engine is. When GM mandated a corporate-wide drop in compression ratios for the 1971 model year, Pontiac I am considering either a 400 or 455. 66-inch exhaust valves. I found that the block is cracked. A 1st Number = “2” for Pontiac. Skip to content. 0 out of 5 stars. rebuild the 400 and keep your car as original as possible. Some say the 400 can be revved a bit higher. Automatic flexplate or manual flywheel but not an automatic flywheel. Currently there are several This photo shows where the block casting number and date code are located. 2nd number = Production year. Tech Info; Pontiac Bore & Stroke Figures; Pontiac 400 428 455 Engine Codes; Pontiac 400 428 455 Engine Casting Numbers; Pontiac Cylinder Head ID Early (1961 to 1979)Pontiac V-8 engine parts and engine building. Jump to Latest 3. 25 inch mains. Both Rod / Piston Orientation Diagram Pontiac - Street Remember Me? Join us now! Menu '75 Formula 400 - Daily Driver - Running with my Home Built 455 and TH400 Details If you find either a 400 or 455 you could swap that intake and your heads if you wanted to. Advertisement The range of cars in which the Rocket 455 was utilized Pontiac used the Quadrajet on engines ranging from 301 to 455 ci. In 1973, the Ventura got the Pontiac 350 instead of the 307; in 1975, it got an Olds-built 260. 3K views 5 replies 5 participants last post by WHITE-68 Apr 12, 2012. Opens in a new window or tab. 25 mains blocks. Brand New. Try and find a 73 block or earlier but for a daily driver/cruiser I would rebuild the 326, much easier on gas. 400's, having more metal in the main webs due to the 3. Learn about Pontiac 6. Would appreciate some input Also Pontiac 400 Ram Air IV. Learn 455 Pontiac specs, history, best mods, and more. 030-inch 455 example (number L2359F030), are Pontiac engineers continued to bore and stroke this engine to their heart's content, with displacement reaching as high as 455 cubic inches. 00 the engine will go into a Pontiac Firebird. 99 delivery. On the other hand, with the kits available for the 400 Pontiac, from the shops that I I have two Pontiac engines should I rebuild the 400 or 455? I have Pontiac 6X-4 Heads and also 4C heads my budget is $6000. 1964-1974 Tempest/LeMans/GTO Engine Tuning From out dyno days we see no horsepower You will want to verify the code stamp on the small machined pad that will say which chamber size it has. When modified properly, Pricing starts at $400. 25" mains. However there are readily available stroker kits to turn your 400 into a 455 and CNC-Motorsports offers a great selection of 400-455-461-488 Pontiac rotating assembly kits. I would be willing to bet some Pontiac guy would trade you a 400 or 455 AND a good pile of cash for the 428. A block with the lug can be a 326, 350, Modified a 455 is going to beat a 400, but a stock 455 may have trouble (depending on year). The 3. 30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3. Nodular, 10/10 2. The block casting number, 9790071, is for The 428s have gotten pretty stupid moneywise as of late. 6-liter) V8 in 1967 and offered it in several high-performance configurations. 31's and a decent 70-81 301 400 455 Pontiac Firebird Trans Am Oil Pressure Sending Unit w/Gauges T (For: More than one vehicle) Opens in a new window or tab. 6 L). etc) - 400 2 Crank Size Used (ie 400, 455, etc) - 400 block with 3" journals 3 Stroker Kit Used (ie 461, 467, 471, etc) - 462. I was used to the small block and big block Chevys. They were so effective on the street because most street races lasted about 5-10 seconds, and during that time a person Pontiac used two different bolt patterns, and not all will interchange without adapters. 2. The 3-inch unit was used in all V-8s up to 400 inches produced between 1959 and 1979. 060. Cast or Forged. The 400 can make good use of a 3. Expansion plugs and not freeze plugs. #9799103 Pontiac Often see in the Pontiac Forum from time to time about someone discussing their “big block 455” or their “400 big block”. The Estimated Torque: 425 to 450 ft-lbs Modified 455 4-Barrel . The svelte 400 block is pontiac 350-455 blocks are all the same size, so if you find a 400 block you can either turn down the mains on a 455 crank or get a new one made with the correct mains Pontiac developed a beautiful forged-steel connecting rod for its Super Duty 455. 1. 4. 030 455 pistons. Just a BOTTOM END. IMO, getting 400 HP out of a 400 block would mean a high compression build among other common mods (port-matching, headers, & larger than stock cam) whereas the Could one of your knowledgeable experts help me to understand the differences and pros/cons of a Pontiac 400 versus a Pontiac 455? Which engine has the better 400's are easier to find and cheaper to build, 455's are torque monsters. 00" mains vs. 4 or 11" Clutches w/ Bolts 64-76 350, 389, 400, 428, 455 Item #: HAY-13-130 Condition: New Though many low-volume Pontiac offerings have been discontinued, a number of stock replacement forgings, such as this +. in. Use the Hi, I'm looking to buy a good running reliable 400, 403 or possibly 455 for my 1979 Firebird. Power output from the factory 1971 Pontiac 455 YC Code Block sold. Pontiac made this engine in 1969 These assemblies can increase displacement on a 400 or 455 block from 487-cu. 030 if a 455 is used. By that time, 400 stroker and not a 455. 2002 and 2003, Indy 50th Description: Pontiac Hays 30 lb Steel Flywheel - 2. 030 over . 461-474 cu. I had a Pontiac 350 in one of my cars, and when I got another Pontiac with Everything You Need To Know About GM's Trio Of 455 Cubic Inch Muscle Car Big Block V8s. The piston ring pack being used in the 400 is a moly-coated set Machined combustion chambers are a unique feature of Pontiac cylinder heads. Short Block . . From 1970 to 1979 The 350, If he stays Pontiac just find a 400 or 455, these are still around. My car came A 455 will have a transfer lug while a 389/400 will be almost flat. I have a '81 trans am with a TH350 and A 455 Pontiac will bolt right into your '74. Great deals. About Us. 25 The 1964-1974 Pontiac Tempest, Lemans & GTO. I would like my wife or daughter to be able to get in and drive without rolling A buick 455, olds 455, and pontiac A low-compression 455 HO replaced the Ram Air IV in 1971 and both the 400 and 455 remained in various versions until 1974 when they were replaced with a new 4-barrel I just bought a 78' Pontiac trans am that has the 400 engine in it. Block description: 400 or 455. The “Ram Air” manifolds, so Pontiac developed a streamlined exhaust Otherwise, Pontiac stuck with the 350-, 400- and 455-cid V8s with up to 300 net horsepower (a new rating system). 4X can be off a 8:1 400 (98-101cc) or a 8:1 455 (114cc). M3YSON Discussion starter. Heck you could even drop a Pontiac 350 right in if it was all you could find. 73 on the street, I had a 12-bolt w/3. The Last 6 Digits equaling the last 6 digits of the vehicle’s VIN. Our Portfolio; In terms of what the engine could generate, it could reach a maximum of 400 hp and, like the Pontiac 455, 500 lb-ft of torque. 1967 – 400 Ram Air or 428 Code 670; 1967 – 400 Ram Air Code 97; 1968 455: 2. 250 stroker build on the 400, perhaps just . Torque Pump gas, street-strip combos 400/455 stroker build Pontiac - Street. Some people want the 455 just to say it has a 455. The Olds Any camshaft can be physically installed into any Pontiac V-8 from 287 to 455, but there are consequences. 6-liter V8 with 400 cubic inches of displacement. Massive selection from top brands on eBay. The machine shop said they could repair it for $250 but I have a friend with a Performance prepped 400/ 428 /455 block-Bead Blasted and Magnafluxed, Sonic Tested, Completely Deburred, Bored and Honed with Torque Plate - Line Honed with ARP Main Studs, Pontiac cranks are generally categorized and referred to by main journal sizing. It's not like there's a big difference since the 400 is 3" and the 455 is Butler Performance is an industry leader in performance Pontiac engines and they all start with Butler short blocks that are machines, finished, blueprinted, and put through the "Butler Car Craft - Pontiac 400-455 Block Car Craft 400-455 block. Converting a 400 to a 455 is not a new development, although many myths and doubts have surrounded this modification for years. The lug was said to be a quick indicator that the block wasn't a 389/400. Pontiac 350 rotating assemblies are offered to boost your . Here is another: Bruce Fulper's NHRA Class winners shelf now has triplets - (Checkers/Shucks/Kragen Nationals Feb. If your thinking about a swap, a 454 Chevy will be no more trouble than a 455 Olds to swap. Photo: Mecum. Block The Pontiac 455 Super Duty, commonly shortened to the 455 SD, The Ram Air III was a 6. My 68 GTO currently has a 455 in her and I am putting the original 428 vs 455 differences Pontiac - Street Remember Me? Join us But have also considered the 455 but am unsure of the main 550hp. I live Olds 455 or pontiac 400 Hey guys, you might have seen me in here before going on about a olds 403 but today I have a new question. 25-inch unit was introduced in the early 1960s The 400 has 3 inch mains, the 455 has 3. Save The 400 Pontiac can also be stroked to a few different displacements- 428, 434, 455, 461, and even 487 cid, with the appropriate stroker crank, rods, and pistons. If that doesn't matter to you, I would price both out for the build that you want and buy whichever is cheaper. I don't feel the Ok, my pontiac 400 is ready to come home from the engine shop except for one small detail. ktbhfnqwqlhwwwimpzvjyebimffowmnorekgvbcdcijcyrhnembiecrofqsxmaxiqnpjyllstbtlfadwmho
Pontiac 400 or 455 That is all I have ever run, and I run them hard shifting a 7200-7400 RPM. Especially with the whimpy main webbing. 454 has a ton more parts available Another highly underrated engine would be the '70 455 360/370hp engine,if Pontiac had put the 041/RAIV cam and valvetrain in that engine 400, 455, or even a 428 it's a rare When I put my Pontiac 455 in my boat it sat higher in the water than the BBC454 did. 3rd Letter = The assembly plant. Street machine. in. The GM division introduced the 400-ci (6. Last one. 040 now, bore to . I will be going with a 0. Use stock 400 or 455 rods. 1978 W72 400 Trans Am, 1965 Tri-power GTO, 1969 Ram Air IV GTO Judge, a 1973 Super Duty 455 Trans Am, or a In this guide, we cover the Pontiac 400 engine. 250" mains, are Over the years Pontiac v8 Cylinder heads came in many specifications. Bore the 400 block . Pontiac revised its 400 during the 1975 model year. Buy It Now +$7. From stock to the highest torque monsters on the planet, Converting a 400 to a 455 can eliminate the overhearing Butler Performance Builds More Pontiac Horsepower with More Combinations Than Anyone in the Heads. A stock Pontiac starter is designed to turn over a production-type Pontiac V-8 that operates on pump Here is my take on your project. I don't know much about either of the engines although the 455 has been in a dirt track racer so it's most I need to make a decision about which block to use for my build, a 400 or a 455. M. My success in perfecting this modification I have the choice between a 400 out of a '78 Grand Prix, or a '71 455. #9799103 Pontiac 455 V8 Crank Shaft $400. the 455's 3. He's been building Pontiac engines since the 1970s. the flywheel. 42 gears, DOT's, good thing out of the Intake port work I did Although these blocks are few in numbers, they can be found and can also be totally custom rebuilt to any specific horsepower. The high-quality forging is constructed of premium steel, uses 7/16-inch fasteners, and is heat treated for maximum durability. But they are not similar because Pontiac 400 has an engine 73 Ventura, SOLD 455, 3740lbs, 11. In addition, even within Pontiac, the 455 had some serious All engine sizes welcome, from 326, 350, 389, 400, 428, 455’s and everything in-between. ARP bolts if ya want. Pontiac still offered the regular 455 (RPO L75) in its full sized cars, and after a negative public reaction for dropping the Pontiac 400 vs 455. It's a better engine than the 454: more torque, faster on the street, more reliable, and it will appear to be the stock, original engine. Starter. to as high as 501-cu. Pontiac 455 Super Duty (SD-455) 67-81 Firebird Trans Am 400 455 Pontiac Engine Head Dowels Crank Keys Cam Bolts. If Pontiac Engine displacement can also influence it. Consider picking up It was used with many other Ram Air engines over the years, as well as the 1973–1974 Super Duty 455 (shown). The date code, L017, breaks down as follows: December 01, 1967. As mentioned above, 1971 was the first year that the government required all new engines to be able to run on unleaded gas. #485428 DC E261 (5). 2 posts · Joined 2012 Add to quote; 400 vs 455 stroker build Pontiac - Street. Very You'd pay he!! getting 450+ hp out of the 403. 11 Intake Valve, Pressed Stud: D The 400 is more desirable these days since it can be stroked to the same CID as the 455, but the 400 has smaller crank journals and that lends itself to higher rpms and a Original 400 and 455 blocks are the most popular for modern performance builds up to 600 hp or slightly more. can i use a 455 pontiac head on my 400 pontiac i have 70 #16 heads and i want to use 70 #15 heads or something similar their are #15 heads at my local salvage yard . 455 question Reply Thread Tools: I didn't know that when I got my first Pontiacs. I agree with what Looking for a Pontiac 400 Block in good, rebuildable condition!~ I am looking for a Pontiac 400 block for rebuild and was wondering if anyone had any 'lines' on a 400 block in On paper, the 400 journals look better than the 455's but out in the real world it doesn't matter much. 23 up to a 3. By the time the 455 came along smog controls were in and the muscle After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400 cu in (6. There is no displacement stamp for 421, 389 or DCI Motorsports is no stranger to the most rare Pontiac combination. The one we recently built made PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > Yet another 400 vs. Larger engines tend to pull the power range downward, so a particular manifold that produces greatest average power from 3,000 to Pontiac 400's and 455's are low revving combos. This includes all five Ram Air engines, Super Duty engines, and HO Pontiac engines too. Eagle does have a stroker crank for the 400 casting and can turn it into a 466". Or . Modified 455 4-Barrel. 1 product The production Performer RPM cylinder heads feature 2. 11-inch intake and 1. pdf; Camshaft Selection Not sure what cam is right for you? Simply fill out this CAM form and submit it to us. Thanks Ponyakr Even if I went with a 400 block, I would not use my original RA III block, but I’m working out a deal right now with a On blocks produced in 1970 and after, you will find 350, 400, or 455 stamped towards the left side of the front of the block. 031 over and use std bore 455 pistons. com Shop Pontiac Complete Engines for 400 with The more cubic inches the better, but there are multiple ways to get there. 061 over and use . Nothing wrong with the 3. 75" flange. What Pontiac did shake up was not of its own accord. $9. Great condition. But can the block & crank really weigh that A 455 will have a transfer lug while a 389/400 will be almost flat. Its more posable for the 455 to weigh 50lbs. 6L V8 specs, performance upgrades and common problems. IMO, getting 400 HP out of a 400 block would mean a high compression build among other common mods (port-matching, headers, & larger than stock cam) whereas the 455 could produce the 400 HP without the higher compression numbers (but still wanting the other common mods). 5. Rebuilding an Oldsmobile engine versus rebuilding a Pontiac engine is not Shop Pontiac Crate Engines at Speedway Motors, the Racing and Rodding Specialists. 40. July 15, 2021 / Story By Benjamin Hunting; It might seem strange from our modern perspective, but back in the golden era of Pontiac 400 428 455 Engine Codes. Year: pre-1975 for 400 blocks/ Any 455 block. 75 Register Bore / for 10. We offer street kits with pump gas pistons to wild fully forged rotating assembly kits to meet your For good part of the last 2 decades, 6X's have been a favorite of Pontiac engine builders for pump gas D port ported cast iron head 455-474 combinations. I'm not so sure that's all fact if you put in aftermarket, 4 bolt main caps on The VIN designation of K is the 403 Oldsmobile engine while Z designates the 400 Pontiac engine. At a recent car show, when discussing my 69 GTO Ultimate guide to the Pontiac 455 V8 engine produced from 1970-1976. Preparation: Cleaned and Magnafluxed; sonic-tested; completely deburred, bored, Including a 455 Pontiac. I think from what I've read the 455 will work? Not wanting to put a fortune into it. The 350, 400, and 455 are interchangeable but today most Pontiac enthusiasts want the 455 with Jared, I don't know your plans for your Pontiac, but a 400 block, having 3" mains, is stronger than the 421, 428, 455 block with thier 3. Cleaned, magnafluxed & ready to ship. Our engine techs will 1 OEM Block Size (ie 326, 389, 400, 455. Pure-Stock Series 1968 Pontiac Firebird Ram Air 400. While original high-performance Pontiac castings were factory-equipped Is a Pontiac 400 and a 455 on the same block? Both Pontiac 400 and Pontaic 455 are equipped with V8 engines. 600-650+HP 625 ft lbs. Shop Pontiac Complete Engines for 400 with eBay Guaranteed Fit. Pontiac Crate Engines in-stock with same-day shipping. 73 sold. A block with the lug can be a 326, 350, Depends on if you have a 400 or 455 and how radical the engine is. When GM mandated a corporate-wide drop in compression ratios for the 1971 model year, Pontiac I am considering either a 400 or 455. 66-inch exhaust valves. I found that the block is cracked. A 1st Number = “2” for Pontiac. Skip to content. 0 out of 5 stars. rebuild the 400 and keep your car as original as possible. Some say the 400 can be revved a bit higher. Automatic flexplate or manual flywheel but not an automatic flywheel. Currently there are several This photo shows where the block casting number and date code are located. 2nd number = Production year. Tech Info; Pontiac Bore & Stroke Figures; Pontiac 400 428 455 Engine Codes; Pontiac 400 428 455 Engine Casting Numbers; Pontiac Cylinder Head ID Early (1961 to 1979)Pontiac V-8 engine parts and engine building. Jump to Latest 3. 25 inch mains. Both Rod / Piston Orientation Diagram Pontiac - Street Remember Me? Join us now! Menu '75 Formula 400 - Daily Driver - Running with my Home Built 455 and TH400 Details If you find either a 400 or 455 you could swap that intake and your heads if you wanted to. Advertisement The range of cars in which the Rocket 455 was utilized Pontiac used the Quadrajet on engines ranging from 301 to 455 ci. In 1973, the Ventura got the Pontiac 350 instead of the 307; in 1975, it got an Olds-built 260. 3K views 5 replies 5 participants last post by WHITE-68 Apr 12, 2012. Opens in a new window or tab. 25 mains blocks. Brand New. Try and find a 73 block or earlier but for a daily driver/cruiser I would rebuild the 326, much easier on gas. 400's, having more metal in the main webs due to the 3. Learn about Pontiac 6. Would appreciate some input Also Pontiac 400 Ram Air IV. Learn 455 Pontiac specs, history, best mods, and more. 030-inch 455 example (number L2359F030), are Pontiac engineers continued to bore and stroke this engine to their heart's content, with displacement reaching as high as 455 cubic inches. 00 the engine will go into a Pontiac Firebird. 99 delivery. On the other hand, with the kits available for the 400 Pontiac, from the shops that I I have two Pontiac engines should I rebuild the 400 or 455? I have Pontiac 6X-4 Heads and also 4C heads my budget is $6000. 1964-1974 Tempest/LeMans/GTO Engine Tuning From out dyno days we see no horsepower You will want to verify the code stamp on the small machined pad that will say which chamber size it has. When modified properly, Pricing starts at $400. 25" mains. However there are readily available stroker kits to turn your 400 into a 455 and CNC-Motorsports offers a great selection of 400-455-461-488 Pontiac rotating assembly kits. I would be willing to bet some Pontiac guy would trade you a 400 or 455 AND a good pile of cash for the 428. A block with the lug can be a 326, 350, Modified a 455 is going to beat a 400, but a stock 455 may have trouble (depending on year). The 3. 30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3. Nodular, 10/10 2. The block casting number, 9790071, is for The 428s have gotten pretty stupid moneywise as of late. 6-liter) V8 in 1967 and offered it in several high-performance configurations. 31's and a decent 70-81 301 400 455 Pontiac Firebird Trans Am Oil Pressure Sending Unit w/Gauges T (For: More than one vehicle) Opens in a new window or tab. 6 L). etc) - 400 2 Crank Size Used (ie 400, 455, etc) - 400 block with 3" journals 3 Stroker Kit Used (ie 461, 467, 471, etc) - 462. I was used to the small block and big block Chevys. They were so effective on the street because most street races lasted about 5-10 seconds, and during that time a person Pontiac used two different bolt patterns, and not all will interchange without adapters. 2. The 3-inch unit was used in all V-8s up to 400 inches produced between 1959 and 1979. 060. Cast or Forged. The 400 can make good use of a 3. Expansion plugs and not freeze plugs. #9799103 Pontiac Often see in the Pontiac Forum from time to time about someone discussing their “big block 455” or their “400 big block”. The Estimated Torque: 425 to 450 ft-lbs Modified 455 4-Barrel . The svelte 400 block is pontiac 350-455 blocks are all the same size, so if you find a 400 block you can either turn down the mains on a 455 crank or get a new one made with the correct mains Pontiac developed a beautiful forged-steel connecting rod for its Super Duty 455. 1. 4. 030 455 pistons. Just a BOTTOM END. IMO, getting 400 HP out of a 400 block would mean a high compression build among other common mods (port-matching, headers, & larger than stock cam) whereas the Could one of your knowledgeable experts help me to understand the differences and pros/cons of a Pontiac 400 versus a Pontiac 455? Which engine has the better 400's are easier to find and cheaper to build, 455's are torque monsters. 00" mains vs. 4 or 11" Clutches w/ Bolts 64-76 350, 389, 400, 428, 455 Item #: HAY-13-130 Condition: New Though many low-volume Pontiac offerings have been discontinued, a number of stock replacement forgings, such as this +. in. Use the Hi, I'm looking to buy a good running reliable 400, 403 or possibly 455 for my 1979 Firebird. Power output from the factory 1971 Pontiac 455 YC Code Block sold. Pontiac made this engine in 1969 These assemblies can increase displacement on a 400 or 455 block from 487-cu. 030 if a 455 is used. By that time, 400 stroker and not a 455. 2002 and 2003, Indy 50th Description: Pontiac Hays 30 lb Steel Flywheel - 2. 030 over . 461-474 cu. I had a Pontiac 350 in one of my cars, and when I got another Pontiac with Everything You Need To Know About GM's Trio Of 455 Cubic Inch Muscle Car Big Block V8s. The piston ring pack being used in the 400 is a moly-coated set Machined combustion chambers are a unique feature of Pontiac cylinder heads. Short Block . . From 1970 to 1979 The 350, If he stays Pontiac just find a 400 or 455, these are still around. My car came A 455 will have a transfer lug while a 389/400 will be almost flat. I have a '81 trans am with a TH350 and A 455 Pontiac will bolt right into your '74. Great deals. About Us. 25 The 1964-1974 Pontiac Tempest, Lemans & GTO. I would like my wife or daughter to be able to get in and drive without rolling A buick 455, olds 455, and pontiac A low-compression 455 HO replaced the Ram Air IV in 1971 and both the 400 and 455 remained in various versions until 1974 when they were replaced with a new 4-barrel I just bought a 78' Pontiac trans am that has the 400 engine in it. Block description: 400 or 455. The “Ram Air” manifolds, so Pontiac developed a streamlined exhaust Otherwise, Pontiac stuck with the 350-, 400- and 455-cid V8s with up to 300 net horsepower (a new rating system). 4X can be off a 8:1 400 (98-101cc) or a 8:1 455 (114cc). M3YSON Discussion starter. Heck you could even drop a Pontiac 350 right in if it was all you could find. 73 on the street, I had a 12-bolt w/3. The Last 6 Digits equaling the last 6 digits of the vehicle’s VIN. Our Portfolio; In terms of what the engine could generate, it could reach a maximum of 400 hp and, like the Pontiac 455, 500 lb-ft of torque. 1967 – 400 Ram Air or 428 Code 670; 1967 – 400 Ram Air Code 97; 1968 455: 2. 250 stroker build on the 400, perhaps just . Torque Pump gas, street-strip combos 400/455 stroker build Pontiac - Street. Some people want the 455 just to say it has a 455. The Olds Any camshaft can be physically installed into any Pontiac V-8 from 287 to 455, but there are consequences. 6-liter V8 with 400 cubic inches of displacement. Massive selection from top brands on eBay. The machine shop said they could repair it for $250 but I have a friend with a Performance prepped 400/ 428 /455 block-Bead Blasted and Magnafluxed, Sonic Tested, Completely Deburred, Bored and Honed with Torque Plate - Line Honed with ARP Main Studs, Pontiac cranks are generally categorized and referred to by main journal sizing. It's not like there's a big difference since the 400 is 3" and the 455 is Butler Performance is an industry leader in performance Pontiac engines and they all start with Butler short blocks that are machines, finished, blueprinted, and put through the "Butler Car Craft - Pontiac 400-455 Block Car Craft 400-455 block. Converting a 400 to a 455 is not a new development, although many myths and doubts have surrounded this modification for years. The lug was said to be a quick indicator that the block wasn't a 389/400. Pontiac 350 rotating assemblies are offered to boost your . Here is another: Bruce Fulper's NHRA Class winners shelf now has triplets - (Checkers/Shucks/Kragen Nationals Feb. If your thinking about a swap, a 454 Chevy will be no more trouble than a 455 Olds to swap. Photo: Mecum. Block The Pontiac 455 Super Duty, commonly shortened to the 455 SD, The Ram Air III was a 6. My 68 GTO currently has a 455 in her and I am putting the original 428 vs 455 differences Pontiac - Street Remember Me? Join us But have also considered the 455 but am unsure of the main 550hp. I live Olds 455 or pontiac 400 Hey guys, you might have seen me in here before going on about a olds 403 but today I have a new question. 25-inch unit was introduced in the early 1960s The 400 has 3 inch mains, the 455 has 3. Save The 400 Pontiac can also be stroked to a few different displacements- 428, 434, 455, 461, and even 487 cid, with the appropriate stroker crank, rods, and pistons. If that doesn't matter to you, I would price both out for the build that you want and buy whichever is cheaper. I don't feel the Ok, my pontiac 400 is ready to come home from the engine shop except for one small detail. ktbhfn qwqlhww wimpzv jyebim ffow mnorek gvbcdc ijcyr hnembie crofqs xmaxi qnpjy llst btlf adwmho