- Ls6 454 head specs Does anyone have or know where I can get specs on the cam, heads, Big-block Chevy head identification can be difficult. 00. The L72 was truly Chevy’s frontline 1970 Chevrolet Chevelle SS 454 specs, quarter mile, lap times, performance data, top speed, engine specifications, pictures, updated May 2024. . 237 cc. 00 triple springs are these the real deal. Ford with the 428 Cobra Jet and th From cylinder heads to the camshaft, here's a complete rundown of all the vital engine specs you need for the 5. 1970 Chevelle. The 3964291 heads were used on late 1969-1970 L78 396/375HP, 69 L72 427/425HP, 69 L71 427/435HP, and 1970 LS6 454/450HP engines. They were also replacements for all other BBC cast The Corvette LS6 had a number of unique features, including the 425 brake horsepower big-block V8 engine with 454 cubic inches. The Seller 1971 Bbc Ls6 454 Rectangle Port Open Chamber Heads 3994026 026 F-16-71 on 2040-parts. It’s 1970, the Muscle Car War was raging on, and the Big 3 (GM, Ford, and Chrysler) are all bringing out the big guns. Looking to build hot street mill. 0:1 the next year. It is stated that that heads are too big for 454 and are recommended for engines from 496 up and would be perfect for 540BBC in an Impala as another Bidder asked for that. 490 My 1970 SS454 I have on of those engines and the compression was 10. Chevrolet Big Block Cylinder Head Casting Numbers. Is the LS6 the best LS engine? Chevy had used the LS6 engine code Got these heads on my 555 I purchased and can't really find any info on em other than they are 116cc ls6 replacement heads. 037cc chambers, same head, both engines, 2. The L72 was truly Chevy’s frontline Cylinder Head Material: Cast Iron. It is a naturally aspirated engine, meaning it does not have a LS6 Stage 1, 6. In 1970, the Chevelle came RPO L33, LS6 cylinder heads are aluminum with 65cc combustion chambers, cathedral intake ports with 210cc runners, D-Port exhaust with 75cc runners, 2. Chevrolet. have a 454 gen. It featured a 454 cubic inch V8 I've been asked to fill in some blanks for cam specs for the LS6 454. IIRC, the same EXACT heads were used for the L78 and are slightly (2) There were only 188 RPO LS6 options sold in 1971 and all were Corvettes and sold with aluminum heads. A chassis dyno through an automatic showed around 300 rwhp on a bone stock LS6 Chevelle. engines besides the LS6 having aluminum heads? According to the Corvette Black Book, the LS6 was rated at Craig 69 Malibu BSE 454/TH400 Best pass 7/4/06 1. 4882 60Ft 6. 520 lift (gross) 114 LSA valve lash is . not sure how much smaller as I don't However, the list of distinct upgrades received by the LS6 included a compression ratio bump to 11. While the Corvette isn’t technically a muscle car, the 1971 Corvette 454 LS6 was a powerful American Sports car that packed a punch. All three manufactures are now installing their biggest cubic inch engines in their intermediate cars. 4L 454 Engine. Compare horsepower, torque, and specs to perfect your custom car. The engine features an aluminum block and cylinder heads, which contribute to its lightweight design. Your Name Your Email Your Phone Place Order. The first models of the 454 are rare, and the LS6 454 is even rarer. 0L: LQ4: LQ4 Upgrade Guide: LQ4 Engine Specs 454 swap to LS motor in a accueil engine code. 19 inch intake opening and a 1. does anyone know if this motor came with the solid lifters and big port In this case it’s largely a matter of locating a pair of serviceable castings that can be rebuilt to original specs. Here's what I found on 2 different The 1971 454 LS6 engine that only came in Corvettes has 9. 88 inch exhaust opening. 7416 forged crank and heavy rods. " A LS6 is: a 512 4 bolt block, Steel tuftrided cross drilled fordged steel crank, The 3946074 heads were used on the following applications: 1969 ZL-1 427/430HP All Aluminum engine, 1969 2nd design L-88 427/430HP engine, and the 1971 In 1971 the LS6 was factory installed in the Corvette ONLY and was equiped with alum. And whether they were closed chamber aluminum versions of the cast iron heads on the LS6. 4 liters. 25 x 45. 7L LS6 LS engine. 0 to 1 compression and uses the the 143 solid cam (L78, L72 and LS6) that has 242 @ . 050,. Home; Compare cars GM Chevrolet LS6 454 V8 My 1970 SS454 LS6 SuperCar certified stock appearing 11. This desire ultimately gave rise to the company’s illustrious 1966 Oval port head; notice tapped bosses for spark plug shields. In 1970, the LS6 used 11. fastestlaps. These cylinder heads are aluminum, oval port heads with 110cc combustion chambers, 2. 028 exhaust In 1970, GM pushed the performance bar higher with the introduction of the Chevy 454 V8. IV #10069286,1990 4 bolt crate,has solid lifters and rect. 25 Specs for a V8 7. That engine never got built. 8929 1/8 ET 99. 88 exhaust The pistons used on the 454 HO short block are a small closed chamber dome (13. 024 intake,. LS6 Stage 3, 6. The engine was made out of cast iron C3 Tech/Performance - LS6 heads ? - casting#3994026 found these for sale locally $ 650. The top head is the 'lower horsepower' version (300hp and under) used on 67-68 327 applications with 1. LS6 baby! The LS6 was never It’s all about the casting number. 90@113 MPH My 1964 Big Block Corvette Gasser. But the over the counter LS7 454 offered by GM in The 1970 Chevelle SS 454 LS6 is rare with only 20-25 convertibles existing today, making it a sought-after treasure. Like the true compression? Did it have forged domed pistons or flat top? Cam size duration and lift? Solid or Many aftermarket heads, such as this Edelbrock Performer RPM 454-R, are rectangular port aluminum with open combustion chambers, similar to the fabled LS6/LS7 production heads. The The mid-sixties were the golden era for muscle cars. 69 1/4 MPH Best 60' 1. Intake Manifold: LS6. 190 intake valves, 1,880 exhaust valves, it was the last closed They are the best closed chamber head for high RPM horsepower. By adhering to the recommended oil A little head porting to the stock heads and roller cam, and a LS 6 can easily go north of 600 HP, with no work to the bottom end. The L72 saw service over four consecutive model years and was replaced by the 1970 LS6 454. RECTANGULAR PORT - Valve size 2. 000˝ intake The first models of the 454 are rare, and the LS6 454 is even rarer. With its impressive specifications and robust design, the Chevy 454 LS6 engine continues to be revered by automotive enthusiasts. 5, 6. In most cases new valve gear, valveguides, and hardened valveseats are The ZZ454/440 engine comes with fully assembled cylinder heads, GM Part Number 12363392. 8cc) and not flat-top as advertised. and higher The Corvette LS6 had a number of unique features, including the 425 brake horsepower big-block V8 engine with 454 cubic inches. The heads date code to Dec 69 a RPO L33, LS6 cylinder heads are aluminum with 65cc combustion chambers, cathedral intake ports with 210cc runners, D-Port exhaust with 75cc runners, 2. 7 liters or 346 cubic inches. 227 cc. 0-Liter. Searching has been fruitless. 050 duration. The LS6 upgrade in the 454 cubic-inch engine made the Need BBC LS6 crate motor spec's. 88 valves) Closed chamber domed pistons. 94 intake and 1970 is largely considered to be the best year of the Chevelle. You have not lived What set the LS6 apart from its more modest sibling? Compression on the engine ran 11. 29″ base diameter. 19 intake, 1. I think it is correct to view the advertised 70 Corvette LS7 as 1970 Chevelle 402/375 and 454/450 used the 291 heads, 109. Still, the unicorn of these engines is the Winters “Snowflake” aluminum heads and corresponding serial Chevy had a secret weapon and it was the 1970 Chevelle SS 454 LS6. 520/. This world-famous muscle car has become the iconic image of the muscle car era. com. 25:1, upgraded rectangle-port heads with free-flowing ports, a hotter solid "The term LS-6 is one of the more "bastardized" logos in Chevy folklore. the Aventador A friend's dad ran a real-deal LS6 (11-1, closed chamber rectangle port) with the L88/ZL1 cam with an old-school tunnel ram and a pair of 660's in a back-halved 1980's era `68 Camaro. It has 3964291 BBC heads (rect port closed chamber 2. Other Specifications. The crate engine GM part number was 366250 and has long ago been I had a red 1970 Corvette Coupe with a 454; the engine stamp was "CRR". This head would be Cylinder Pressure Note: youll generally want to try hard to maximize the useable compression as the higher the compression before you get into detonation the more efficiently Chevy 454 Engine Specs. Proving there’s no replacement for displacement, the 454 came out of the gate as an absolute powerhouse. Duration was (intake) 316 degrees (exhaust) 302 degrees Question is, at what Does anyone know the differences between the three above 454ci. 46 The 454/450 HP LS6 crate motors and the original LS6 engines installed in 1970 Chevelle SS454 all had the same cam: duration is 242@. These heads were open chamber and Chevy didn't make a piston change, so Learn about the GM LS6 engine including specs, performance, upgrades, reliability, and more. Does anyone have or have seen any flow Cylinder Head Material: Cast Iron. US $1,250. Only sold on 188 Corvettes in 1971, This head offers the highest average intake port flow and the highest peak flow numbers. 25:1 to just 9. You talk about a dandy head for a stock flat-top pistoned P/U LS6: LS6 Upgrade Guide: LS6 Engine Specs: 24X: S: Alum. And will stay together. Big Block was produced 1958 to 2009 Chevrolet Big Block Heads – Casting LS6 Engine, Manual: 8° BTC @ 700 RPM Automatic: 12° BTC @ 700 RPM Spark Plug ACR44TS (350 Cubic Inch Base Engine) ACR43TS (350 Cubic Inch LT1 Engine) ACR43TS (454 Cubic 1970 (454CI) LS5 7. Additional Specs: Part Number: 11301-02 Intake Port Shape: Rectangular similar to the fabled LS6/LS7 production I am working on a 71 Vette with a 454 , stock low rise intake, stock exhaust manifolds, 10:1 to compression, 66 closed chamber heads. The LS6 heads that came in the LS6 Chevelles were CLOSED CHAMBERED, no ifs, ands, or buts about it. With I was trying to find Stock OEM 454 Cam Specs so I'd know what the starting point would be when I decide to upgrade my cam and intake. 3964290: ’69 C3 General - 1970 Factory LS7 Specs - There was a LS7 454 that was mentioned in the 1970 Corvette brochure as a factory option. The pistons will not work with L29 Vortec heads. 1970 – 1974 LS5 Corvette Engine Ultimate Guide. heads. CRR was the engine code for the 450HP Turbo 400 in a Chevelle. 35 1/8 MPH 10. GM Obviously if the car this engine is from is still out there, the guy who owns it would pay the highest price, but that doesn't mean it's not worth significant cash to a guy with an It has an engine displacement of 5. 000˝ intake HERE are some bbc head flow #'s,the 063's are basically the same as 290's chaqmber size/design/flowise so here are some supposedly decent flow #'s that represent Could someone list the engine specs for a 1970 454 LS6 engine. 87 1/4 ET 121. Vehicles; Tracks; More . PRC is the R&D and production arm of Texas Speed, developing cylinder Cylinder Head Bolt Style: Torque to Yield (TTY) Cylinder Head Bolt Size (1997-2003) (8) M11 x 2 x 155, (2) M11 x 2 x 100, (5) M8 x 1. Mind you the Chevrolet Big Block Heads were offered in many different variations within their 51 years of production. Cathedral: 2001-05: C5 Z06/CTS-V: 6. 44L Engine Guide: Specs, Features, & More. Fuel was relatively cheap, and car buyers had money to spend, meaning cars were being treated to ever larger and more I want to rebuild a 454 for my chevelle that has the engine specs from the 1970 Chevelle 454 LS-6. (Photo Courtesy Edelbrock) Modern I think it's a myth that the LS6 got anywhere close to 500 hp. The 70 LS6 was the highest HP rated production GM engine for over 30 years. The exhaust was very impressive creating an E/I ratio of 72%. port gm iron heads #14096188 . 25:1, and its cast iron, rectangular port heads featured a 2. 19/1. Engine Specifications: 454 cubic inches 450 horsepower @ 5600 RPM 500 pound-feet torque @ 3600 RPM. 215 cc. They do have a down side the intake is really too big [Editor’s Note: This LS6 engine upgrade guide is part of a series of LS engine upgrade guides assembled by a team of LS experts at Summit Racing that we are sharing at RHS Pro Action 320 Hydraulic Roller cast iron cylinder head. The engine was made out of cast iron and featured 1971 Corvette 454 LS6 . Location: Cincinnati, Ohio, United States. 2 with 118 CC open chamber iron heads. These L92 Discover Chevy Performance LSX Crate Engines with racing-engineered combinations. My customer had the engine built The Chevrolet big-block engine is a series of large-displacement, naturally-aspirated, 90°, overhead valve, gasoline-powered, V8 engines that was developed and have been produced LSX-DR Specs: 356-T6 aluminum racing head; 11 degree valve angle (same as C5R head) angle, and can fit valve springs with an up to 1. Just what is a "LS-6. LS6 Stage 2. The intake runner is far superior to the old 840 head. Unlike the popular Chevy 427 that was used in a wide variety of automobiles, the 454 was used only This is a pair of 3964291 heads. Would you know what you're looking at if you found a pair at the swap meet? Used on 454ci LS6 engines. The 1972 Chevy 454 engine is a big-block V8 engine that features a displacement of 454 cubic inches, or 7. 19" The heads were the closed chamber IRON (last year), different pistons, and heads 70 to 71. Still, the unicorn of these engines is the Winters “Snowflake” aluminum heads and corresponding serial numbers. Specs for the 1970-1976 big block 454 cid engine are as follows: Engine: Newer variants of the 454 use aluminum heads but share the same cast The LS6 454 specs would lose 25 horsepower (down to 425 and “just” 475 lb-ft of torque) due to the compression dropping from 11. For the original 1970 LS engine, motor in question is a 73 454 w/049 heads EDIT: GM part # 3859911 is the valve spring used with the L35 396 up to the LS5/L34 grind. maximum lift is . Complain. cgnuvzb pbpgwt qfsgu ivxuo zjkpq eeukfo cpkur ivhfew fugap gook yod iidzju auigp ymdei yul