Mazdaspeed2oo35
600whp - 600wtq at 30 PSI
normal vac is 20-22. I dont see how all that would would make less vac cause its supposed to be sealed, yea it might have more space to fill with the pnp stuff in the mani but i would think it should remain the same vac. sounds like you have a leak, especially where its hissing. but thats just a guess on where it is. see if u can do the smoke test. that works alot better than the carb stuff, i never got the carb thing to work for me.
Yeah, i might have to remove my Intake Manifold to check if i have something wrong with it. i don't know a crack, bad gasket or anything else, if the gasket is good, can it be reused ? i hope i can because i don't feel like waiting to get one from US, if i have a leak in the intake manifold, what do you think it might be Terbow ? the sound is very strong in the last 2 runners, to the right side of the manifold