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View Full Version : Is a little boost spike when setting the gain on boost contoller (Profec B) normal?


Vamp
11-03-2006, 05:51 AM
While my boost settings are working just fine on my Profec B II, I still see some boost spike no matter what. It's usually only 1/2 - 1psi. If I turn the gain down, then my boost will start to drop off at higher RPMs. I've even turned my set gain (when the wastegate starts to open) down so I'm only relying on my wastegate spring (7psi rate). I don't see the boost spike on the controller when it's happening until the last boost display kicks in when I let go of the gas. Is this normal, and if so, how much boost spike is acceptable?