It isn't going to pull at all without changing the gearing. You could put a 500hp supercharger on the car and it would still be sluggish without the gears.
Adding 100hp to this setup won't even show in 1/4 mile times.
How much does the car weigh?
what I'm thinking is that you really need 4.33:1 rear gears with an overdrive transmission so you can cruise reasonably with it.
I'd take a guess and say you probably have something around a 3.00:1 rear ratio now? With that it is a 16 or 17 second 1/4 mile car and won't embarrass a Ferrari unless it is Uncle Luigi Ferrari (no relationship) and he is pushing a gellato cart?
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