Regany New Member 22 Member For: 5y 6m 10d Posted 22/05/20 04:12 AM Share Posted 22/05/20 04:12 AM Hi guys, cars been at the tuners for a over 2 weeks now the car is having a problem with over boosting we have taken off the turbo (3582r) and have got the turbo ported and new flapper but it's still boost spiking we have tried all the obvious reasons and have no idea why it's doing it the actuator is a 12psi turbosmart any information would be greatly appreciated cheers Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 29,031 Member For: 16y 8m 1d Gender: Male Location: Melbourne Posted 22/05/20 04:33 AM Share Posted 22/05/20 04:33 AM swap out the actuator to a stock one and see if it continues to overboost. Link to comment Share on other sites More sharing options...
Regany New Member 22 Member For: 5y 6m 10d Posted 22/05/20 04:40 AM Author Share Posted 22/05/20 04:40 AM We did that before we ported out the turbo and it spiked. next thing we are going to try is different springs but I doubt that'll change it the springs it has in it equal to 12psi but arnt the combination that are on the chart turbo smart give you as a combination for 12psi so I'm not sure if it's that or not Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 29,031 Member For: 16y 8m 1d Gender: Male Location: Melbourne Posted 22/05/20 04:44 AM Share Posted 22/05/20 04:44 AM if it spikes on the stock actuator with the boost solenoid bypassed, then you have a mechanical problem... the wastegate is either getting stuck closed (or not opening correctly) the actuator isn't setup correctly (pre-load etc). Link to comment Share on other sites More sharing options...
Regany New Member 22 Member For: 5y 6m 10d Posted 22/05/20 04:55 AM Author Share Posted 22/05/20 04:55 AM Waste gate definitely wasnt getting stuck we made sure of that and they have made sure the preload is right bloody pain in the ass Link to comment Share on other sites More sharing options...
gaz097 Bronze Donating Members 1,752 Member For: 13y 4m 20d Posted 22/05/20 08:17 AM Share Posted 22/05/20 08:17 AM Is it a GTX or just the stock turbo. What's it spiking too in psi? Link to comment Share on other sites More sharing options...
JETURBO ...JD TUNING ADELAIDE... Gold Donating Members 23,708 Member For: 16y 6m 10d Gender: Male Location: Adelaide Posted 22/05/20 09:31 AM Share Posted 22/05/20 09:31 AM You need a new tuner ... Two weeks was only acceptable back in 2008 Link to comment Share on other sites More sharing options...
Regany New Member 22 Member For: 5y 6m 10d Posted 22/05/20 09:37 AM Author Share Posted 22/05/20 09:37 AM It's the factory turbo not gtx, was spiking to 21psi Was only making about 330kw at 4500rpm spiking to 21psi boost curve isnt very nice though staggers up and the fuel was rich as Link to comment Share on other sites More sharing options...
JETURBO ...JD TUNING ADELAIDE... Gold Donating Members 23,708 Member For: 16y 6m 10d Gender: Male Location: Adelaide Posted 22/05/20 09:48 AM Share Posted 22/05/20 09:48 AM See above post 1 Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 29,031 Member For: 16y 8m 1d Gender: Male Location: Melbourne Posted 22/05/20 09:51 AM Share Posted 22/05/20 09:51 AM just put the stock actuator back on and check it with a compressor to ensure it opens the flap completely at about 10-12psi or so, then plumb the actuator directly to the front of the turbo and see if it overboosts. If it still overboosts in that sort of situation, the only way for it to happen is for your wastegate to be stuck closed mechanically in some way shape or form. Link to comment Share on other sites More sharing options...
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