LS6 454 Chevelle gets a suprise
03-29-2004, 03:17 PM
#41
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Originally Posted by maddboost
in 1970 there were two SS models a 396ci which was I believe called the LS-5 and the 454ci which was the LS-6. Im not to familar with the 396 SS so im just trying to pull this stuff from memory. Plus the LS-6 came with disc brakes in the front, not bad for 1970.
03-29-2004, 04:00 PM
#44
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Ok, chevy's 450hp rating was a joke- like they all are, most would put down over 500hp and 470s to the wheels. also- a simple aluminum intake, 280g cam, new roller rockers, headers, and a 800cfm carb and a LS6 SS will run 11s.
remember carbureted cars run like raped apes for very little dough and are torquey *****!
remember carbureted cars run like raped apes for very little dough and are torquey *****!
03-29-2004, 04:11 PM
#45
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Originally Posted by Bowtiered
Ok, chevy's 450hp rating was a joke- like they all are, most would put down over 500hp and 470s to the wheels. also- a simple aluminum intake, 280g cam, new roller rockers, headers, and a 800cfm carb and a LS6 SS will run 11s.
remember carbureted cars run like raped apes for very little dough and are torquey *****!
remember carbureted cars run like raped apes for very little dough and are torquey *****!
800 cfm is a big carb. Stocker is a 650 cfm. I dont want to ruin the car by making it too crazy. Thats what my camaro is for. I might do the intake but im gonna stick with a small cam and keep the stock carb.
03-29-2004, 04:16 PM
#46
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Originally Posted by maddboost
800 cfm is a big carb. Stocker is a 650 cfm. I dont want to ruin the car by making it too crazy. Thats what my camaro is for. I might do the intake but im gonna stick with a small cam and keep the stock carb.
03-29-2004, 04:26 PM
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800 should be about stock because the 396 came with a 750 on it. 800 is not going to be to big with other mods like free flowing exhaust and a teamg intake or for more torque an rpm air gap. that will keep from killing any driveability but give it a big kick in the pants.
03-29-2004, 04:31 PM
#48
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Originally Posted by 68maro
800 should be about stock because the 396 came with a 750 on it. 800 is not going to be to big with other mods like free flowing exhaust and a teamg intake or for more torque an rpm air gap. that will keep from killing any driveability but give it a big kick in the pants.
03-29-2004, 04:32 PM
#49
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the 850 should not be that bad... i have a 650 for the time being on my fastback, and i will be moving to a 750 4bbl demon or something of that sort for when i start to spray on the stang
03-29-2004, 04:46 PM
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found this out for you
General Motors finally lifted the ban on engines larger than 400 cid in intermediate cars in 1970 and Chevrolet responded by creating two new 454 cid V8s, the LS5 and LS6, and stuffed them into their Chevelle and El Camino. The LS6 used the same block as the LS5 but added on a 800-cfm Holley four barrel on an aluminum manifold, 11.25:1 compression, solid lifters, four-bolt mains, forged steel crank and connecting rods, forged aluminum pistons, and deep-groove accessory pullies. No production engine ever had a higher factory horsepower rating. The LS6 would be a one year only engine as the GM mandated switch to Regular Unleaded in 1971 sealed its doom.
Ratings:
450bhp@5600rpm, 500lb-ft@3600rpm.
Installation:
1970 Chevrolet Chevelle SS454: ?.
1970 Chevrolet El Camino SS454: ?
Total Production: ?.
General Motors finally lifted the ban on engines larger than 400 cid in intermediate cars in 1970 and Chevrolet responded by creating two new 454 cid V8s, the LS5 and LS6, and stuffed them into their Chevelle and El Camino. The LS6 used the same block as the LS5 but added on a 800-cfm Holley four barrel on an aluminum manifold, 11.25:1 compression, solid lifters, four-bolt mains, forged steel crank and connecting rods, forged aluminum pistons, and deep-groove accessory pullies. No production engine ever had a higher factory horsepower rating. The LS6 would be a one year only engine as the GM mandated switch to Regular Unleaded in 1971 sealed its doom.
Ratings:
450bhp@5600rpm, 500lb-ft@3600rpm.
Installation:
1970 Chevrolet Chevelle SS454: ?.
1970 Chevrolet El Camino SS454: ?
Total Production: ?.
03-29-2004, 06:58 PM
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Originally Posted by maddboost
800 cfm is a big carb. Stocker is a 650 cfm. I dont want to ruin the car by making it too crazy. Thats what my camaro is for. I might do the intake but im gonna stick with a small cam and keep the stock carb.
I wasn't really talking to you, just chevelles in general. for a big block 800cfm will never be too big, not for a 454 anyway. with a 280g cam you could probably go 900 with good headers and an singe plane victor manifold. but to keep it tame go perfrmer dual plane. the performer air gap has the highest power band, so it's not the best for low end torque.
03-29-2004, 07:23 PM
#53
Originally Posted by Bowtiered
I wasn't really talking to you, just chevelles in general. for a big block 800cfm will never be too big, not for a 454 anyway. with a 280g cam you could probably go 900 with good headers and an singe plane victor manifold. but to keep it tame go perfrmer dual plane. the performer air gap has the highest power band, so it's not the best for low end torque.
Um.....actually there are a ton of variables that go into what makes a carberator too big or too small...vaccum secondaries, quadrajet(what is on our chevelle), double pumpers, and a list of other stuff that are options for carberator that make them respond differently to the change in size.....The idea of a carberator being too big or too small all has to deal with what kind of throttle response you want, where and how you want your power, and so on....
As for a LS-6 Chevelle against ANY car that runs 12.30's w/ a 2.4 60'.......NO WAY IN HELL MAN...unless you're hustling this somehow, you wouldn't have a chance. In our chevelle we have a 12 bolt w/ 3.73's, TH400 w/ a shift kit and a stall, and a k-block 454 punched out to a 468.....the motor isn't super extreme(show/street car), but it is definately more aggressive than a LS-6....when we line them up with my car(12.96 @108) i get him by about a car from 50-110........
So unless you've got something up your sleeve, i dont see it happening.....then again, from a dead stop, if he throws a 2.4 60' and your on some sticky stuff.....anything can and WILL happen!!
Good race either way
03-29-2004, 08:24 PM
#54
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bowtired what are you talking about the air gap having the highest power band. the performer is idle to 5500 the air gap is 1500 to 6500 how much driving are you going to do below 1500? it probably idles close to 1000 so what's the better choice the one that has a lower really unused powerband that falls off early or the one that starts at 1500 where you'll at least launch at and will pull to 6500plus and the air gap is a dual plane intake like the performer
the 2.4 was on my old tires 