Building A Domestic RWD V8 Roll Race Monster

greasy

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If you had to build a roll race monster out of a domestic RWD V8, what would you focus on? I'm just curious with the popularity of roll racing, seeing that 5.0 Novi doing work, and how bad my car is at roll racing. What is ideal for transmission gearing, rear end gearing, NA/Turbo/Nitrous/Supercharger??? I'm interested in what everybody thinks.......
 

Mook

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Buy a C6Z.

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Turk

Lt. Ron "Slider" Kerner
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To be honest, any car can be good at roll racing. You need to have a power band that makes power at high rpms and at least a 6 speed transmission. What type of gearing you want depends a lot on what speeds you actually plan on roll racing from. The end of the day, it's all physics. The car making more HP/Weight will win, unless the other car has a much better trans.
 

Rent Free

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For roll racing specifically if that's the target here I don't see how it would be hard to go wrong with a high rpm V8 in a light car that has a few stages of nitrous.

Nitrous has always seemed like some magic sh1t that everyone is always hush hush on or no one uses it at all.

Plus a built nitrous car seems like a good way to keep the weight down too. :dunno:

Like for example a 600hp NA LSwhatever and 2 stages of bottle on top of that. Rest would come down to gears, and weight.

Nitrous cars have always impressed the shit out of me. Just looks like a NA LS engine until you find out its making 8-900 or more with a few stages......
 

jason05gt

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To be honest, any car can be good at roll racing. You need to have a power band that makes power at high rpms and at least a 6 speed transmission. What type of gearing you want depends a lot on what speeds you actually plan on roll racing from. The end of the day, it's all physics. The car making more HP/Weight will win, unless the other car has a much better trans.


Aerodynamics play a bit part too especially above 100 mph.
 

Typhoon

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I think aero's play more of a factor than weight in this case. If weight and power were all that mattered then bikes would absolutely dominate. Yet we still videos of "only" 800ish HP supras and heavy GTR's blow by them on the top end. Not saying it doesn't matter, I just think it matters less when your already moving and only going in a straight line.
 

greasy

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Jim, why didn't you go 4.56?

I am entertaining a steeper gear in the future, but that all depends on what trans I will be putting in the car. I was speaking with BottleFed, he runs a 4.30 in his car and loves it. If stay with the T45 5 speed and have it built, I will stick with the 4.10's. It will not only be a smoother shifting trans, but much cheaper as well.

I have been thinking a bunch about a 6 speed swap, just not sure I want to go that route for better gas mileage and highway gearing.
 

Turk

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I think aero's play more of a factor than weight in this case. If weight and power were all that mattered then bikes would absolutely dominate. Yet we still videos of "only" 800ish HP supras and heavy GTR's blow by them on the top end. Not saying it doesn't matter, I just think it matters less when your already moving and only going in a straight line.

Well technically speaking, F=MA so weight matters just as much from 0 as it does at 100mph. The difference is that aerodynamics doesn't matter at all at 0, and a lot at 100mph. Unfortunately, power and weight are a lot easier to change/upgrade than aerodynamics.
 

Turk

Lt. Ron "Slider" Kerner
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So I see a lot of talk about types of forced induction......what about rear end gearing transmission gearing?

This is impossible to say, because it depends on motor, trans and rear end. For instance, the R8 has a 3.09 rear end but shifts at the same MPH as the M3 which had something like a 4.00.

Here's what the R8 has which I feel is pretty good for roll racing, gives you about 30mph per gear.

1st - 4.37/13.46/(8700) 48mph
2nd - 2.71/8.35/(8700) 77
3rd - 1.93/5.94/(8700) 109
4th - 1.50/4.62/(8700) 140
5th - 1.24/3.82/(8700) 169
6th - 1.04/3.20/est (8400) 196
 
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