so, my b18c11 only made 140 whp the other day on the dyno, i was confused and all. But i went and took it to a diffrent dyno today,m and we figured out what the problem is.

Before vtec, im boosting 8.5 psi....then when vtec kicks in my boost drops to 3.5psi! MY BLOWER BELT DOSENT dosent seem to be slipping or anything though. ill post my NeW dyno plot later when i can scan it. it was done on a diffrent dyno though, so it says 157whp

anyways, so, im leaking boost somewhere when vtec kicks in, and i dont think its a belt slipping. any other suggestions?

 

Check the bolts that attach the blower to the manifold: 2 inside, 2 outside. I've seen some people not use locktite on them and the torque and vibration cause them to loosen up quick. Definitely check the 2 inside the blower, don't wanna suck one of those inside your motor