That was the LS7 version, which supposedly never made it into production. IIRC it had aluminum heads and a different intake. I remember reading an article about it in Hot Rod when I was a kid. I think it dyno'd at 600 hp.
Negative. The LS7 never came in a production car. It was an over the counter only engine. The LS6 was the 450/460 HP engines. The LS6 had iron heads.
Negative. The LS7 never came in a production car. It was an over the counter only engine. The LS6 was the 450/460 HP engines. The LS6 had iron heads.
Not mopar related....
True, but that was the intended engine, that never went into production. And yes, they were offered over the counter.
http://www.ehow.com/list_7617778_gm-1970-ls7-454-specs.html
Several stories as to why they weren't produced, one being they had a problem with the aluminum heads, others because of insurance, and emissions. I remember reading an article in Hot Rod about both engines when I was a kid.
The 390 horse motor in the '70 Corvette was the hydraulic lifter LS 5.They didn't have the LS 6 emissions certified in the Corvette in time for production,or something like that,so the Corvette didn't get the LS6 till '71.Actually, when looking the cars up, the Corvette seems to have not been offered with the 450 OR 460 HP engines. The highest HP rating I can find was the 425 HP LS6 454 in 1971.
Funny that in 1970, the 454 in the Corvette was rated at only 390 HP, but the Chevelle LS6 was rated at 450 HP. Now that I think about it, I know why. The Corvette's hood could not clear the Chevelle's high rise intake. I don't know what changes were made in 71, but obviously there were some.
True, but that was the intended engine, that never went into production. And yes, they were offered over the counter.
http://www.ehow.com/list_7617778_gm-1970-ls7-454-specs.html
Several stories as to why they weren't produced, one being they had a problem with the aluminum heads, others because of insurance, and emissions. I remember reading an article in Hot Rod about both engines when I was a kid.
Rusty, you are 99% correct.1970 was a gray area with insurance companies and what not.So automakers bent the truth with specs. My brother has a 70 LS6 Chevelle bought new.It came with a "Low Rise" aluminum intake with a 780 Holley.His car is a "Day 2".On the second day after you brought the car home you changed the intake, carb, removed the smog pump,installed headers and Cragar SS wheels.With the Edelbrock "High Rise" and 850 double pumper you no longer could use the stock cowl induction air filter housing.My understanding is the same as yours that the Corvette's advertised HP was 10 more than the Chevelle even though the engines were the same.Not that this has anything to do with the discussion,,Another strange thing about Corvette is in 1973, Black paint was not available.
The 390 horse motor in the '70 Corvette was the hydraulic lifter LS 5.They didn't have the LS 6 emissions certified in the Corvette in time for production,or something like that,so the Corvette didn't get the LS6 till '71.
Sure it went into production. Just not in a car. I remember WELL into the 1980s that you could still buy one from PAW. They musta had a boatload of engines, because they offered all kinda cool stuff. Even with aluminum blocks. I am quite sure there are still some untouched LS7 engines in crates out there.
so...what was the real horsepower of the famous L88 ?
..i have read 500+
not as much as the real horsepower of a Boss 429, I'll bet.
429 was a dud street engine rated at 375 HP easily had more but not very streetable ...428 much better street engine .. it was never intended to be any good on the street it was their NASCAR engine and they needed to build production cars to satisfy NASCAR race rules .. worth a lot of money today for there rarity