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post #1 of 6 (permalink) Old 05-23-2015, 12:14 PM Thread Starter
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I have a stock set up with an aftermarket ballbearing turbo. Nothing crazy. How much boost should I be producing. At wot I'm only getting 10 and I feel like I should get more
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post #2 of 6 (permalink) Old 05-23-2015, 01:31 PM
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Re: Boost

Sounds like you have a boost leak with only 10 psi. I'd look into a leak tester to see if it's a clamp/hose etc.


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post #3 of 6 (permalink) Old 05-23-2015, 04:32 PM
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Re: Boost

Check all of your connections on the boost side. Your preload pressure on your wastegate needs to be at least in the 22-25 psi range. On my stock turbo and 38r, I tightened the WG all the way down so that it couldn't open. I didn't have enough injector for it to matter.

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post #4 of 6 (permalink) Old 05-26-2015, 01:32 PM
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Re: Boost

If you have the GTP38R BB turbo you need to be running a chip at least 50HP. Otherwise you'll actually see a drop in boost. I assume you are running a chip and are not stock?

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post #5 of 6 (permalink) Old 05-26-2015, 10:58 PM Thread Starter
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Re: Boost

yes I run a superchip on the lowest setting
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post #6 of 6 (permalink) Old 05-28-2015, 12:03 AM
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Re: Boost

10 psi is much too low. You should be around 26-28psi with a tune on there and stock injectors. In my stock tune with a 38R, I can hit 24psi.

Boost or drive pressure leaks for sure. Pressurize the system and spray soapy water on all connections to check for leaks. Take a look at the up-pipes for any soot at the connections.

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