Okay I will tell you, and Scotty correct me if im wrong, Because you tuned my car so much. Ive blown 2 D15b7s, (This is not cuz of Scotty,I have a led foot and I push my car to the limits.I love you Scotty) Stock internals. I run a T25. The car ran well at 10 pounds, and you can tickle 11 pounds sometimes... Never do 12. If you want a quick spool but around 300 and not worrying about boost falling off, I suggest the gt28R BB. That will be in the range. No lag all boost. The D15 is meant to be under 250. Dont make the same mistake that I did.
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