Doug71zt Posted June 27, 2003 Share Posted June 27, 2003 With the Dawesdevice MBC , the spike is quite small - maybe 1 or 2 PSI. It happens quite fast - I couldn't see it on the gauge but my computer's boost cut was set about 1.5 psi above the WG setting and it spiked to the boost cut a couple times if I really rammed the throttle to it.I don't think its a problem because it isn't sustained and it isn't that big of a spike. Some electronic ricer boost controls don't control as well as a ballcheck valve style manual one. Boost creep is something that happens most often with an internal WG that's too small - It won't bypass enough exhaust flow around the turbine wheel. As the engine RPM climbs, the boost climbs also as the turbine is being overdriven with the WG fully open. Only way to get around this is make the WG bypass hole larger or go to a larger external WG assy. I guess you could go to a higher flow turbine wheel but your spoolup may suffer. Hope this makes it a bit clearer for you. Good luck on your hybrid! - Doug Quote Link to comment Share on other sites More sharing options...
Guest bastaad525 Posted June 27, 2003 Share Posted June 27, 2003 Is the stock T3 on an L28 turbo internal or external wastegate? Quote Link to comment Share on other sites More sharing options...
Jersey Posted June 27, 2003 Share Posted June 27, 2003 internal Quote Link to comment Share on other sites More sharing options...
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