07-07-2019, 05:32 PM | #1 |
Drives: 2014 2SS/RS L99 Join Date: Aug 2015
Location: Chicago,IL
Posts: 372
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2014 Camaro SS twin turbo boost issues
I’m having problems with my setup. I had the 10lb springs in the wastegates, the over boost on my GoFastBits III was set to 10.5 #’s, and my car would only boost 7lbs. I cut the wastegate spring pressure in half, now it will only boost 3lbs!!! What the heck am I doing wrong? Can someone please help? I need to see 10lbs of boost.
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2014 2SS/RS AGP Twin Turbo
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07-08-2019, 10:14 AM | #2 |
I would say you’re waste gate isn’t as described. It may say 10 lbs but it’s obviously not and it’s opening soon. I would try another waste gate and see what happens .
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07-08-2019, 10:16 AM | #3 |
Drives: 2014 2SS/RS L99 Join Date: Aug 2015
Location: Chicago,IL
Posts: 372
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I have two 38mm tial wastegates, which came brand new with my AGP kit. I’m going to put the 13# springs in and cross my fingers I hit 10lbs. I’m also going to double check my couplings in case one popped slightly off. I don’t know what else to do at this point
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2014 2SS/RS AGP Twin Turbo
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07-08-2019, 01:37 PM | #4 |
Check your gaskets on your BOV's .
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07-08-2019, 04:32 PM | #5 |
8.60 @ 157 @ 4200lbs
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If your running a 10lbs in your blow off valve and 10lbs waste gates I'd say your blow off valve is being pushed open
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07-08-2019, 04:52 PM | #6 | |
Drives: 2010 Camaro SS Join Date: Jan 2015
Location: Valencia
Posts: 1,305
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Quote:
example 10psi spring with a good boost controller should make up to 20psi. That all being said the PSI rating of the waste gate spring is an estimate, I run 14psi spring and my setup makes 13psi. I normally see 1-2 psi difference from the stated PSI rating. As for your over boost setting, that's only going to come into play when your using the boost controller to raise the boost. So if your running a 10psi spring and say you make 10psi of boost if the boost controller saw an over boost condition it would not be able to dump the boost because your waste gate spring is controlling the boost not the boost controller. |
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07-08-2019, 07:16 PM | #7 | |
Drives: 2014 2SS/RS L99 Join Date: Aug 2015
Location: Chicago,IL
Posts: 372
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Quote:
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2014 2SS/RS AGP Twin Turbo
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07-08-2019, 07:30 PM | #8 |
Served USN - Atomic Chimp
Drives: 2021 Camaro ZL1 1LE A10 Join Date: Jul 2012
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Ya, a little loose fitting can wreak havoc on boost. Check tight is the first thing to do.
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07-09-2019, 04:46 PM | #9 |
Drives: All things Turbocharged Join Date: Dec 2010
Location: AZ
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Tial's spring chart shows a higher PSI listed for each springs than you'll usually get. This is because the listed pressure is measured as the gate is open ____mm on a test bench with no exhaust pressure pushing on the valve to push it open. In application you usually get a lower PSI. And it also depends how the vacuum lines are run to the gates, from a higher or lower pressure part of the system. You are reading intake manifold pressure, that is where the 'BOOST' is the lowest. The pressure at the turbos is usually a couple PSI higher.
Last thing, set your "Over Boost" function at least 1psi higher than your target boost or it's going to keep hitting it for a split second and dropping you down to spring pressure. |
07-09-2019, 07:44 PM | #10 | |
Drives: 2014 2SS/RS L99 Join Date: Aug 2015
Location: Chicago,IL
Posts: 372
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Quote:
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2014 2SS/RS AGP Twin Turbo
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07-09-2019, 09:02 PM | #11 |
Drives: All things Turbocharged Join Date: Dec 2010
Location: AZ
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The rubber vacuum line out of your GFB is going to the plenum? Or do you mean the electronic solenoid is on the plenum pressure?
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07-10-2019, 10:13 AM | #12 |
Drives: 2014 2SS/RS L99 Join Date: Aug 2015
Location: Chicago,IL
Posts: 372
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The solenoid!!! Not the vacuum line lol sorry I should have been more clear.
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2014 2SS/RS AGP Twin Turbo
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