Yet Another DIY GTM TT Install

Greedy · 05-14-2012, 10:39 AM

I have the Stage 1 GTM TT and opted to go with external gates. I still get about 1 psi over the EBC setting, but does not creep above that. I set the lower setting to 6 psi and it gets me about 7-7.5 psi. High setting is at 10 psi and it ends up hitting 11-11.5 psi. This is with the gain set at 100 - If I turn down the gain, it gets even closer to the actual setting, but it loses alot of TQ early in the curve...

esfourteen · 05-14-2012, 11:38 AM

Quote:

Originally Posted by Greedy

I have the Stage 1 GTM TT and opted to go with external gates. I still get about 1 psi over the EBC setting, but does not creep above that. I set the lower setting to 6 psi and it gets me about 7-7.5 psi. High setting is at 10 psi and it ends up hitting 11-11.5 psi. This is with the gain set at 100 - If I turn down the gain, it gets even closer to the actual setting, but it loses alot of TQ early in the curve...

yeah the externals have a bigger path for the exhaust gasses to flow. what exhaust do you have? I would advise anyone going with stage 1 turbos to only get the external wastegates for better low boost control.

I'm looking to have a machine shop fabricate some exhaust restrictors instead of going with HFC, hopefully that will keep me under 9psi with the controller off.

Greedy · 05-14-2012, 12:45 PM

I have the GTM 3 inch. More back pressure should help for sure, and I think the restrictors are the way to go, they don't have the same potential of failing or melting like the HFC's. Would be cool to have a modular section of exhaust that you can take out and change the amount of restriction (different baffles / perforated stainless disks etc..) so you can get it dialed in perfectly. - Hope it all works out.

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05-14-2012, 10:39 AM	#1 (permalink)
Greedy Base Member Join Date: Jun 2010 Location: Woodinville, WA Posts: 46 Drives: G37 Rep Power: 16	I have the Stage 1 GTM TT and opted to go with external gates. I still get about 1 psi over the EBC setting, but does not creep above that. I set the lower setting to 6 psi and it gets me about 7-7.5 psi. High setting is at 10 psi and it ends up hitting 11-11.5 psi. This is with the gain set at 100 - If I turn down the gain, it gets even closer to the actual setting, but it loses alot of TQ early in the curve...

05-14-2012, 12:45 PM	#3 (permalink)
Greedy Base Member Join Date: Jun 2010 Location: Woodinville, WA Posts: 46 Drives: G37 Rep Power: 16	I have the GTM 3 inch. More back pressure should help for sure, and I think the restrictors are the way to go, they don't have the same potential of failing or melting like the HFC's. Would be cool to have a modular section of exhaust that you can take out and change the amount of restriction (different baffles / perforated stainless disks etc..) so you can get it dialed in perfectly. - Hope it all works out.