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Old Sep 9, 2006 | 08:03 PM
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Default Engine set back

anyone set a smallblock back 1-2" in a stock frame/ body vet?
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Old Sep 9, 2006 | 08:16 PM
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No but if your going to go to the trouble think more then 1 to 2
vettes have a good front to rear balance from the factory.
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Old Sep 9, 2006 | 08:21 PM
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was thinking of minimal fire wall modifications. I know that this has been done on novas etc. with minimal work. plan on lifting the body in 2 wks...
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Old Sep 9, 2006 | 09:12 PM
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If you lighten the engine, there really is no need on a C3 to need to move it back. I've installed alot of aluminum components (ie. heads, water pump, manifold, etc.) and when I weighed my 76, it had a 50/50 weight bias without me in it. I would actually like to have it more like 52/48 to help reduce oversteer.

Of course if your drag racing it, I could see the reasoning.
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Old Sep 9, 2006 | 09:20 PM
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i've put about alum. everything on the front end, never wt. scaled the car, but do have an eye toward drag racing...
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Old Sep 9, 2006 | 10:05 PM
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Originally Posted by Jason Staley
If you lighten the engine, there really is no need on a C3 to need to move it back. I've installed alot of aluminum components (ie. heads, water pump, manifold, etc.) and when I weighed my 76, it had a 50/50 weight bias without me in it. I would actually like to have it more like 52/48 to help reduce oversteer.

Of course if your drag racing it, I could see the reasoning.
Adding (or changing to) front weight bias is a poor way to reduce oversteer. Increasing your front roll stiffness (or reducing your rear roll stiffness) will reduce your oversteer.
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Old Sep 9, 2006 | 10:17 PM
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Originally Posted by 73C34me
i've put about alum. everything on the front end, never wt. scaled the car, but do have an eye toward drag racing...
Cheating in stock classes will get you tossed. If it`s not for stock classes, why stop at 1-2 inches.
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Old Sep 9, 2006 | 10:50 PM
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Originally Posted by 73C34me
was thinking of minimal fire wall modifications. I know that this has been done on novas etc. with minimal work. plan on lifting the body in 2 wks...
As an example a 69 camaro with a small block no a/c no power stearing
had 55 percent front 45 percent rear. One of my old rags shows
a 70 LT1 vette no a/c or power stearing 49 percent front 51 rear.
I don't even one to look at what a camaro or novas weight dist.is if it had a big block a/c power stearing it would be to scary to look at. my guess would be
around 58 front 42 rear. hell pickups are around 60 front 40 rear.

Last edited by Little Mouse; Sep 9, 2006 at 10:53 PM.
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Old Sep 10, 2006 | 05:03 PM
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Originally Posted by 69427
Adding (or changing to) front weight bias is a poor way to reduce oversteer. Increasing your front roll stiffness (or reducing your rear roll stiffness) will reduce your oversteer.
I have been playing with the roll stiffness and when I get the time, I am going to investigate improving the camber curves & bump steer issues on the both ends of the car. It's just that with me in the car, it actually is rear end biased (like old Porshes) making it a little tricky when running hard. The last time out at the track (not racing, just having fun), I could see where the rear tires were rolling over a bit even at 40 psi. Maybe after I get all the camber/toe/bump-steer curves figured out, it will handle the way I want.

I figure that once I put A/C back in it (it is a street car), this should bring me back closer to a 50/50 with people in the car. I've also debated about trying to lighten up the rear end a bit more .... just not sure how at this point.
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