Ultimatedsm
15+ Year Contributor
- 823
- 27
- Apr 20, 2005
-
Scarborough,
Ontario_Canada
You are hitting full boost at 4000 RPM with a big 16g? Definetly there is something wrong man. Bypass your MBC and see if that helps, check if your flapper is not off centered (this happend to me when I got a jDM engine and the turbo spooled lower). Another problem was my MBC which made the lag inbetween shifts horrible, my 14B would hit full boost at 3000 RPM in the intial gear, but if I upshifted fast and punched it, it took forever to get full boost.