The Alchemist

iTrader: (19)

Here's my dyno graph... blue = current s2 heads, TR224 cam, MAC headers with a crappy y-pipe.


So my question is this.... if I kept my same top end package, I'm adding QTP race headers and y-pipe, what type of numbers would I get with a 383 4.0" stroker setup?

I know its not going to be a maximized drag setup, but what I'm looking for is 400 ft/lb of torque at 3000 - 3500 rpm and topping out the torque at 450 ft/lb by 5000 rpm.

I'm not really concerned about how my hp it will make since I would rather drive and shift the car in the sub 4000 rpm range and I'm looking for more usable torque on a respectable budget.

Thanks.

XTrooper

I'm not really sure, but with the extra cubes you should definitely move up a few notches with your cam. Because of the larger displacement, you'll be able to do this with no effect on driveability or idle quality.

KCFormula

iTrader: (4)

Xtrooper is right. You can go bigger with the cam and not mess with driveability. The extra cubes really need more cam to get the same VE in a larger motor. But just as a rule of thumb bottom end makes TQ and top end makes HP.

The Alchemist

iTrader: (19)

I totally understand that I would need to go with a larger cam, and I also know that horsepower is simply a mathematical derivative of torque at a specific rpm.

The reason I posted my question the way I did, was that most people will post that a 382 all bore will make more horsepower than a stroker will, but that's not what I'm interested in.

I have no interest in shifting this thing at 7000 rpm or to run a cam as big as my thigh. If I went with a larger cam, it would stay around a .560 - .570 lift so I wouldn't have to worry about springs or valvetrain problems.

Thanks guys.

Wet 1

iTrader: (4)

I always figure adding 1 ci will add about 1 hp/tq...