I have an opportunity to get a PT-76 kit for a good deal. what is everybodies thoughts on this turbo? I want about 450ish hp on 15-16 psi pump gas and would like 15 psi no later than 4.5k. will this turbo do it or is it too big? street ported 13b

 

well that is a big turbo... 76 mm I hope you have a full bridge port

 

I believe most people with 76mm inducer-sized turbo's don't make full boost until upwards of 5000rpm. It's quite a large turbo, and is capable of over 600rwhp. If you're looking for "just" 450hp @ 15psi, try the PT67GTQ. You should get full boost at or sooner than 4500rpm depending on manifold and turbine housing among a couple other factors.