33drifta Posted April 20, 2009 Share Posted April 20, 2009 ill keep this short and easy to follow/read car= r33 gtst (drift car) problem= only 200rwkws when should have at least 240 (really need the extra 40 for my drifting). on the dyno it shows 18 psi then drops down to 13 around the 6000rpm mark. things we (tuner) have tried = made all new cooler pipe, took front facing plenum off and machined it to make it fit nice and tight, tried 3 dif boost controllers 2 ebc and one bleed valve boost controller, i know the turbo is good cuz it came off my mates car working perfect giving him 240rwkws at 16psi with same set up as my car. my tuner said it might be leaking boost from the head or something i have no idea and this is giving me the shits. my car has been like this for over a year now, please help me, im almost ready to give up!!! Link to comment https://www.sau.com.au/forums/topic/266307-need-help/ Share on other sites More sharing options...
33drifta Posted April 21, 2009 Author Share Posted April 21, 2009 any one?? Link to comment https://www.sau.com.au/forums/topic/266307-need-help/#findComment-4547021 Share on other sites More sharing options...
Jet 20 Posted April 21, 2009 Share Posted April 21, 2009 exhaust restrictions?? Are you running a cat converter?? Link to comment https://www.sau.com.au/forums/topic/266307-need-help/#findComment-4547840 Share on other sites More sharing options...
33drifta Posted April 22, 2009 Author Share Posted April 22, 2009 (edited) we took the exhausted off on the dyno, gained the usual 5 or so kws. got a highflow cat yeh Edited April 22, 2009 by 33drifta Link to comment https://www.sau.com.au/forums/topic/266307-need-help/#findComment-4549646 Share on other sites More sharing options...
R33GOD Posted April 22, 2009 Share Posted April 22, 2009 (edited) weak actuator spring.... plenum gasket leak..... and if ur running an aftermarket bov. depending on brand, it could be weak Get a boost leak test done whilst uunder load on the dyno. tuner should have thought of that... good luck Edited April 22, 2009 by R33GOD Link to comment https://www.sau.com.au/forums/topic/266307-need-help/#findComment-4550321 Share on other sites More sharing options...
33drifta Posted April 22, 2009 Author Share Posted April 22, 2009 tried 2 actuators, he machined the plenum incase it was the gasket, he installed a stock plumb back bov so could be that but doubt it cuz it was doing the same thing when i was running no bov. yeh i need to get him to do the boost leak test for sure, this has got me stumped. thanx for the replies Link to comment https://www.sau.com.au/forums/topic/266307-need-help/#findComment-4550576 Share on other sites More sharing options...
blind_elk Posted April 23, 2009 Share Posted April 23, 2009 ... on the dyno it shows 18 psi then drops down to 13 around the 6000rpm mark.And what happens to the torque / power curve? Link to comment https://www.sau.com.au/forums/topic/266307-need-help/#findComment-4551110 Share on other sites More sharing options...
33drifta Posted April 23, 2009 Author Share Posted April 23, 2009 just flattens off at around 200rwkws from about 5000rpm Link to comment https://www.sau.com.au/forums/topic/266307-need-help/#findComment-4552063 Share on other sites More sharing options...
33drifta Posted May 19, 2009 Author Share Posted May 19, 2009 did a leak down test and the tuner said it was leaking heaps sometimes, then not at all other times. now he is saying could be the cams . any thoughts????? Link to comment https://www.sau.com.au/forums/topic/266307-need-help/#findComment-4604379 Share on other sites More sharing options...
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