Gsr engine with victor x manifold , turbo and hondata , 3 inch downpipe , which throttlebody should i use in trms of size. I'm getting an STR but not sure which size to get . Im getting spoolinperformance 2.5" charge pipes so im thinking of using the 688 mm since its about 2.6" but i have heard of poeple using up to a 74mm . Which is best to use, i still wanna drive this thing on the street .

Thanks

 

how much HP do you plan on puttin out?

 

Is your motor built?

Since you have the JG IM the smallest you should put on is 65mm...but that's overkill if your puttin under 300whp IMO

 

i say to stay with stock TB and put the $$ into other areas where u will gain more.

Chris

 

This is exactly where you need to look ......... http://www.maxbore.com/