GTM Performance Engineering: MHI Twin Turbo Official Release

megalapagas

Mike told me it was fine to pair up the internal wastegate setup with my F.I 2.5" Non- Resd T.P and CF CBE butI'm afraid of boost creep so idk if I should upgrade to 3" exhaust or go external with my exhaust setup????? Some Info would be appreciated, Thanks!

puckshaw

Did Mike think boost creep would be an issue with that setup? I'm planning on running basically the same thing:

GT2860RS 0.84 A/R
Internal wastegates
GTM test pipes
FI 2.5" CBE (12" res)

megalapagas

Mine Non Resd straight through from T.P through CBE that's why I chose the exhaust for this turbo setup but Im still in that debate because NUNBERS is important and mating a 3" downpipe from EW to a 2.5" cbe wont that restrict flow/power? (Or whatever its called)

*also mike told me that wasn't gonna be an issue with the "18G" turbos and I'm assuminh neither with those but I rather want to avoid it if I can no?

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GTM 34 Row Oil Cooler | K&N Drop Ins w/ Z1's Post MAF Tubes | F.I Non-Res'd 2.5" T.P w/ CF CBE | Axis Wheels | Piecing together My Own Custom T4 Top Mount Single Turbo Kit *Still in the works* |

esfourteen

you wont get boost creep with the .86 AR (stage 2). originally I had .64 AR (stage 1) with internal wastegates and I had trouble running less than 13psi, I got custom 2" restrictor plates made up to put in my exhaust at the time and it worked great, basically adding back pressure prevented exhaust gasses from bypassing the small wastegate opening. I was able to run 10psi on that setup. Now i'm trying to dial in 17psi

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Alkatraz

Sounds like you are going with the exact same setup as myself

Is anyone else here going to need to have the BOV's recirculated (plumbed back)?

I know that I mentioned this to Mike a while back and he said that they would have an option for it because others had already asked about it but he didn't elaborate on what it would be. I don't believe that the standard Tial Q or Turbosmart Raceport BOV's can be recirculated so I would assume that they will send either the Tial QR or the Turbosmart Plumb Back.

Does anyone know more about this?

BlkNismo

will there be boost creep issues with the .64ar running 2.5" all the way back, no cats?

Chuck33079

It's entirely possible if you're planning on using internal wastegates. Either go external or step up a turbo size and you won't have to worry about it.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

megalapagas

By step up a turbo size your reffering to like from .64 to .84?? Don't flame me I'm still in the learning process lol

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GTM 34 Row Oil Cooler | K&N Drop Ins w/ Z1's Post MAF Tubes | F.I Non-Res'd 2.5" T.P w/ CF CBE | Axis Wheels | Piecing together My Own Custom T4 Top Mount Single Turbo Kit *Still in the works* |

Chuck33079

That's correct.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent