exhaust

I currently have a 2 and 1/2 exhaust on my car. I am buying a 3" down pipe with no cat. Also a super 60 is going on the car. Will this size be ok or do I absolutely need 3" or split 2 and 1/2. I feel that the 2&1/2 would be fine. I expect that the car should go mid 14s and I am bell porting the exhaust side (.48 a/r) for better flow. I have read that some cars go slower if the exhaust is too big for what they are flowing!!! So anyone feel free to give me your 2 cents!!!

You *cannot* (i emphasize that because i don't want you to beleive anybody who tells you otherwise) have too big of an exhaust on a turbo car. Bigger is better, but 2.5" shouldn't hold you back enough to justify replacing it with a 3" exhaust.

------------------
Estoril blue 1987 TC 5spd, 146k miles, a237, Bailey BOV, rod's header, spec stg3 clutch, spearco FMIC, t3/t4 50 trim / stage III .63, 3" exhaust, eec-tuner, lm1 wb, 55pph injectors
Best 1/4 mile: 12.89 @ 106mph on 25psi, 1.78 60'