Parry_10 Posted January 8, 2013 Share Posted January 8, 2013 As some of you know im in the process of doing a single build and have a couple of questions id like to get some answers to. 1) Is a 60mm wastegate too big for my set up? 2) I will have 3inch dp/mp and a 4inch cat back, is the 3" going to ristrict me in any way making 7-750fwhp, even if it doesnt will having a 4inch dp/mp make anymore power over the 3inch at this power level or just make more noise? It is going to be much easier and cheaper to stick with the 3" but if I have to go 4" I will. I must make 700fwhp lol. The turbo is 3"vband .81ar 6765 billet. The head ive rebuilt with brian crower ti springs and retainers so my rev limit will be 7500rpm (because I still have a stock bottom end- low mileage, perfect compression) Also cams will be 9.5mm lift. Quote Link to comment Share on other sites More sharing options...
Rob_Mitchell Posted January 8, 2013 Share Posted January 8, 2013 4" will definately flow better over a 3" but will also be louder. I would have gone 4" exhaust if i was you but im sure a 3" will be ok. water Pump is boxed and sending tomorrow morning with other packages! Quote Link to comment Share on other sites More sharing options...
Parry_10 Posted January 8, 2013 Author Share Posted January 8, 2013 4" will definately flow better over a 3" but will also be louder. I would have gone 4" exhaust if i was you but im sure a 3" will be ok. water Pump is boxed and sending tomorrow morning with other packages! Cheers Rob:) Quote Link to comment Share on other sites More sharing options...
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