fast spool on light throttle=leak?

[ballr858]

Every now and then when I give it 20-30% throttle i hit full boost real quick. Would that mean I have a leak? It doesn't stumble at all. It seems like the boost is escaping, but wouldn't that cause some hesitation? I haven't checked it out yet but where would be a good spot to check first? I'm thinking it might be the elbow. Anybody else experience this?

[nrg]

um.. size of your turbo and at what rpm? If the motor holds boost then there isn't a leak; or shouldn't be. Boost = pounds per square inch.

at 3600 RPM i can fully spool 12psi with 30% throttle. It doesn't hold it there unless i open the throttle more.

[ballr858]

t-25. i'm currently running 11 lbs of boost. when i'm cruising on the freeway at around 3000 RPM giving maybe 15% throttle (according to safc2) and boost at 0, giving a little bit more gas around 20% will spool all the way up. it doesn't do it all the time so i'm gonna continue monitoring it.

[Jung918]

So your having partial throttle full boost? Do you have a manual boost controller?

[ballr858]

yeah pretty much. and i have a hallman's manual boost controller.

[Jung918]

On the wrx a lot of people would complain that with the manual boost controllers they would get full boost on partial throttle. I would suggest a electronic one so you wont be running too lean and it should be more linear.

[Taiden]

How would an electronic boost controller be any different than a MBC? If anything, a leaking MBC would keep the w/g open more = less boost everywhere. Makes no sense to me. :(

crap! holy thread resurrection, batman!