So whats goin to work best with my project. Its goin to be a 355, SR, 195AFR, 224-230- 53*- 112 cam setup. Will a 52mm TB or 58mm TB work best on the motor?

 

That motor would definitely benefit from a 58 mm, probably to the tune of 10 hp at peak. However, it's not a deal breaker to keep the 52 mm; Unless you absolutely need that last .05 sec of ET right away, take your time in looking for a good deal on a 58.

 

perfect, thanks thats what i was lookin for! im still lookin for heads and just won a SR via ebay! ill have to keep my eye out for a deal on a 58mm

 

52mm tb will flow something like 800cfm, the 58mm tb will flow 1000cfm. i doubt your car will peak above 6000rpms with the SR. you should be fine with the 52 but u could go 58mm.
got my 58mm tb brand new from proffessional products for about 218$ shipped

 

I was going to suggest the 52mm would be better. You won't loose any power or topend but also you'll get better throttle response. 800cfm dry is quite a bit. the stock 48mm will run 400 horse or something close to that....the 52mm is suffecient. Stay with it.

 

48mmTB is fine upto 400hp with the addition of an air foil to smooth out the incoming air. but a 52mm would be fine.