Originally Posted by PA/XFIRE
Hey 240 nice run, do you think not going over the 18 psi is the reason you didn't go lean or is there another fix ? When i was running stacked, above
19 psi is when all my f/a leaning problems would start. ILLCYA
In a nutshell, yes. I have noticed a correlation with exceeding 18 psi and getting the lean issue. The cold always makes it worse. Its always in the upper rpms. It happens on the street NOT on the dyno. I cant recall anyones car running lean at 17psi, but i might be wrong. This is why no one complains about lean issues with the code 3 pulley.
I think the answer lies in the fuel pump, injectors, and tune. I might add a second walbro(this would be a 1000hp setup) just to eliminate the first part.