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Old 08-11-2007, 06:26 PM   #1
SubaruDriver502
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Default Not hitting target boost

Tuning my buddy's 02 with a tactrix cable. He just got a front mount, intake, TBE, VF39 and sti pinks (565cc) We are trying to get it to boost like my 06 at around 17 or 18 psi. The only thing is no matter how much we mess with the target boost values and WGDC, it still stays at stock boost.

Suggestions?
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Old 08-11-2007, 08:44 PM   #2
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1. Post in the right forum.
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Old 08-11-2007, 10:13 PM   #3
Master2192
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Cobb's instructions have a modified restrictor pill in the mix to get boost control. You can use a interrupt solenoid or try the T-flip mod to get boost up to where you want it. I had a similar issue when trying to get a VF39 to boost 21 psi and did the T-flip and was able to get that boost with about 75% duty cycle.

I can't find a thread on the t-flip right now, but pretty much take the hoses on the stock vacuum T on the boost control lines and make sure that the Solenoid line and Compressor outlet with resistor pill are in a straight line and the wastegate actuator is the one T'd off of that. Stock setup is actuator and compressor outlet are inline and the solenoid is T'd off.
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Old 08-12-2007, 02:46 PM   #4
AnthonyA182
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you can try adjusting your wastegate arm.
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Old 08-12-2007, 03:00 PM   #5
dkan
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+1 WG Arm
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Old 08-13-2007, 01:29 AM   #6
Master2192
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^^^You can't adjust the wastegate arms on IHI turbos fellas
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Old 08-13-2007, 12:08 PM   #7
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Sounds to me like you guys need to verify a few items on the setup.
First you should verify the restrictor is in between the compressor outlet and the "t" in the boost control system. Along with that, make sure you have the right restrictor.
If that is correct, check your IAM. If you experienced some heavy knock events, your IAM can drop rapidly and disable your boost control system reverting you to minimum boost.

If you still have an issue, check for a boost leak. Are your AFRs very rich or MAF voltages unusually high? If so, that is indication of a boost leak.

Lastly, if everything seems to be in order, it's very possible you have a faulty component. Could be the solenoid, could be the turbo, could be a massive up pipe leak (that should be pretty obvious)...

-Dominic
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Old 08-16-2007, 01:17 PM   #8
EdWRX
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What about the solenoid, the stock one is crap, in stg II maps with stock BCS you almost have to max it out to reach 17psi.

Buy the GM one and probably ur problems will be solved.
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