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Crazy spiking after MP install

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Old 09-19-01, 01:28 AM
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Crazy spiking after MP install

Man.. i guess my weird boost patterns is solved with the MP install. now i have a full upgraded exhaust. Before i was seeing 10-6 patterns. now i get 11 on primary and spike dramatically when secondaries kick in to 13psi. Of coarse i quickly let go of the throttle. BUt still can't really tell for sure if i have steady patterns. anyway to fix this spike?
Old 09-19-01, 01:42 AM
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I'd get a boost controller or enlarge your wastegate. Or put your cat on until you upgrade your ECU. I don't want to hear about another FD with a blown motor.
Old 09-19-01, 01:50 AM
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what about cheap preventions to regulate boost? Bleed valve mod? and how much would porting the WG cost? Also i heard about a pop off valve but not sure how u tune it to the boost u want it to release? is it setup like a *** like a manual or is there actual dials for certain psi?
Old 09-19-01, 12:17 PM
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ok what ecu are u running....u have an ecu dont u......

ok options
if u have pfc it can tune out the creep
bleed valves may help but if its creep. ull have to enlarge the wg....

enlarger the wg...if u do it ur self it will take basic tools..abt 4 rs to pyll and dissasemble the turbos from their manifold..then abt 1-2-3 hrs with a die grinder with a carbide de-buring bit...


fab a plate that goes in the exhaust..but only has a 2 1/2 hole in it...
Old 09-19-01, 12:53 PM
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I have a few plates available that I used in the exhaust system with 2 1/2 and 2 1/4 cut outs made of stainless steel.

Anyone interested?


Mike

p.s. I ported the wastegates and no longer need them.
Old 09-19-01, 01:20 PM
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Bigger and better things

 
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READ HIS WORKS BEFORE YOU COMMENT PLEASE

He said spike. To fix spike you either need a new pill on the precontrol line or an adjustable valve in its place!
Old 09-19-01, 01:59 PM
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well since he hasnt run it to redline...he may be creeping......
Old 09-20-01, 01:04 AM
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Most likely creeping. Try the www.dawesdevices.com boost controller.
Old 09-20-01, 03:25 PM
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i just pulled the pills off today... now i'm not getting crazy boost readings. i'm running at a very safe boost level...actually too safe =(. running 8 psi all the way. i might put in the bleed valve and hope to raise it back to 10...would u guys reconmend going back to 10. would the Dp/mp/catback affect the fuel carve at 10 to be in danger of detonation?
Old 09-20-01, 03:44 PM
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leave it at 8psi an ecu is a hell of alot cheaper than a new engine
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