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ImPrOvIsE
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My boost jumps to around 13psi then constantly tapers off to about 7psi by the time I get to 6500rpm. Obviously I have a bleed valve but was wondering if there is something I can do to maybe make it sit on 11psi after the initial spike. I have already placed the valve in the airbox but this didnt fix the problem.

Suggestions?

cheers

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hey Improvise ,

Could be a few things , including stuffed wastegate spring , but most common is how it's(the boost controller that is) plumbed up.

Make sure that there is nothing else inline with the boost control.ie: hose straight from the pressure side of the inlet to the boost control ,to the wastegate.

Block off the factory boost soleniod & unplug the electrical connector.

Having said that , all bleed style boost controls will "spike" a little , especially in low gears

& most stock turbos aren"t that efficient high up in the rev range.

I use a "Gated" Turbosmart boost control , & have done for years , with no probs ;)

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