Quote:
Originally Posted by Ktucky1LE
I went on GPI website and thought I saw they offer a ported TB? Said only for NA applications? Or maybe that was literally the rod mod you were mentioning... I will look again.
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If i had to do a ported throttle body right this second I would pick the Katech OEM one. Its absolutely not because I have insight on whos porting is better but solely because I can see in pictures that Katech trims the throttle blade down. Bo deleted the front blade on his stage 2 and on his stage 3 significantly took material off the back. So me recommending Katech is because its the most similar to what I know and am used to. The reason it probably says NA applications only is the 90mm TB sometimes has issues where the blade will flutter under boost and make the car very unhappy. BUT as I stated im running a ported tb with no front blade and the car makes 9.5psi. So take that "only for NA applications only" with a grain of salt.
https://katechengines.com/i-30497835...ttle-body.html
Rod mod manifold
https://gwatneyperformance.com/ls3-intake-manifold-mod/
For the manifold I used Rick Crawford but GPI copied his research and started doing it. Rick ports out the center posts and GPI is an option to do that. I dont know how much this mod picked up but I did it in conjunction with longtubes and drove it across FL to the other coast and got it tuned. As far as boost goes, Rick told me theres a number of his manifolds seeing 20+PSI with no issues.