-31 half hole preload std jet in c port nothing in return..

You really need it to hold 22psi and spike around 26 psi but please be warned as Tony as said there are many factors involed and you really need a wide band afr gauge to check to be safe.

344 bhp was on a std engine escos with a T34/63
347 bhp was on a std engine using a T34/48 (on the limit of injectors)
333 bhp on my std 110k engine T34/48

All dyno'ed on the same rolling road(flywheel figures)