GTM Performance Engineering: MHI Twin Turbo Official Release

Chuck33079 · 07-10-2013, 09:29 PM

Iwg works, but it can be prone to boost creep on smaller turbos with engines that pump a lot of air. Ewg always allows better boost control. Boosting the 7at has its own issues which have been well documented at this point.

megalapagas · 07-10-2013, 09:36 PM

I have looked into it and I am going to purchase a boost controller for the same reason but just wanted to clear that out from experience turbo users.

Chuck33079 · 07-10-2013, 09:49 PM

A boost controller will have no effect on boost creep. That's a mechanical issue. No guarantee it'll happen, but its possible.

Alkatraz · 07-10-2013, 09:53 PM

Quote:

Originally Posted by megalapagas

I ordered the IWG and I have a 7AT, any downside to that?

Downside is the extra cost to keep the 7AT alive.

Just make sure that you get a transmission cooler and either the Transgo or GTM valve body upgrades and you should be fine.

Alkatraz · 07-10-2013, 10:11 PM

Quote:

Originally Posted by Chuck33079

A boost controller will have no effect on boost creep. That's a mechanical issue. No guarantee it'll happen, but its possible.

Correct.

I would also suggest that anyone who is going with a much larger exhaust, ie. 3" would probably be more prone to boost creep with IWG's. I haven't run a search but has there been much of a history of boost creep with 370Z/G37 TT installs? I don't remember seeing mention of it.

OP, make sure that you install a good boost gauge and set alarms. If you find that the boost is creeping consistently then you can look at either porting or swapping to EWG.

I have a feeling that once everyone starts their GTM installs and run them for a few months, we will start to see what issues are common across the setups. If 50 kits are installed then we should have several thousand miles worth of 'real world' testing done within just a few weeks.

Chuck33079 · 07-10-2013, 10:15 PM

There's not a history of boost creep, but the 16g is the smallest turbo I've heard of being used so far.

Alkatraz · 07-10-2013, 10:39 PM

Quote:

Originally Posted by Chuck33079

There's not a history of boost creep, but the 16g is the smallest turbo I've heard of being used so far.

Glad I chose to go with the 18G then!

megalapagas · 07-11-2013, 12:03 AM

Yea I went with the 18Gs for the same reason haha, but yes I already have a Tranny cooler, VB, and workin on getting my gauges to have prepped before I get my kit...and yes I didn't go 3" on my exhaust seeing as you still get pretty solid numbers with 2.5"

But thx for the info guys I just have a quick question though, have any of yall looked into Zeitronix Dash Daq XL?? Or should I stick to regular Gauges?

Dzel · 07-11-2013, 08:32 AM

I was just going to go regular but I saw a parrot system on here with a GTR your load out.

Sent with TapAhoe

Dzel · 07-11-2013, 08:41 AM

Type*

Sent with TapAhoe

COSMO · 07-13-2013, 05:06 PM

Anyone know the turbo size the gtr?

G37Sam · 07-13-2013, 05:39 PM

Copied from GTRlife

Quote:

R35 GT-R turbos - IHI RHF55 same as MY06 STi Impreza
Turbocharger Type RHF55
Turbine Blade no. 11
Compressor Blade no. 6 + 6
Turbine Rotor Size 53mm / 48mm
Compressor Rotor Size 60mm / 46.5mm
Max. Turbine Speed 165000 rpm
Wastegate Open Press. 78 kPa
A/R Ratio 15
Compressor seal material Synthetic mica + Teflon
Bearing Type Floating Metal Bearing

GT-R Turbos

Smaller than say a 2530 turbo on the compressor side, a little bigger than a 2530 on the outlet.

Chuck33079 · 07-13-2013, 05:41 PM

I had no idea it was a pair of 2006 Sti turbos. That's kinda cool.

Dzel · 07-13-2013, 06:06 PM

That is crazy I thought they would be a Garrett type or something.

Sent with TapAhoe

Chuck33079 · 07-13-2013, 06:10 PM

Isn't the hot side cast into the manifold?

07-10-2013, 09:29 PM	#1111 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	Iwg works, but it can be prone to boost creep on smaller turbos with engines that pump a lot of air. Ewg always allows better boost control. Boosting the 7at has its own issues which have been well documented at this point. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

07-10-2013, 09:49 PM	#1113 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	A boost controller will have no effect on boost creep. That's a mechanical issue. No guarantee it'll happen, but its possible. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

07-10-2013, 10:15 PM	#1116 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	There's not a history of boost creep, but the 16g is the smallest turbo I've heard of being used so far. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

07-11-2013, 08:32 AM	#1119 (permalink)
Dzel A True Z Fanatic Join Date: May 2011 Location: Midland, TX Posts: 3,884 Drives: 11 370Z PW M6 Rep Power: 23	I was just going to go regular but I saw a parrot system on here with a GTR your load out. Sent with TapAhoe __________________ 10secWS6 IF YOU CAN'T SWING IT THEN DON'T BRING IT! Check out Domestic Performance C.C.

07-11-2013, 08:41 AM	#1120 (permalink)
Dzel A True Z Fanatic Join Date: May 2011 Location: Midland, TX Posts: 3,884 Drives: 11 370Z PW M6 Rep Power: 23	Type* Sent with TapAhoe __________________ 10secWS6 IF YOU CAN'T SWING IT THEN DON'T BRING IT! Check out Domestic Performance C.C.

07-10-2013, 09:36 PM	#1112 (permalink)
megalapagas Enthusiast Member Join Date: May 2013 Location: McAllen,TX Posts: 457 Drives: '10 370Z Tour A/T Rep Power: 12	I have looked into it and I am going to purchase a boost controller for the same reason but just wanted to clear that out from experience turbo users.

07-11-2013, 12:03 AM	#1118 (permalink)
megalapagas Enthusiast Member Join Date: May 2013 Location: McAllen,TX Posts: 457 Drives: '10 370Z Tour A/T Rep Power: 12	Yea I went with the 18Gs for the same reason haha, but yes I already have a Tranny cooler, VB, and workin on getting my gauges to have prepped before I get my kit...and yes I didn't go 3" on my exhaust seeing as you still get pretty solid numbers with 2.5" But thx for the info guys I just have a quick question though, have any of yall looked into Zeitronix Dash Daq XL?? Or should I stick to regular Gauges?

07-13-2013, 05:06 PM	#1121 (permalink)
COSMO A True Z Fanatic Join Date: Dec 2012 Location: FL Posts: 1,816 Drives: 2012 Touring GTM TT Rep Power: 19	Anyone know the turbo size the gtr?

07-13-2013, 05:41 PM	#1123 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	I had no idea it was a pair of 2006 Sti turbos. That's kinda cool. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

07-13-2013, 06:06 PM	#1124 (permalink)
Dzel A True Z Fanatic Join Date: May 2011 Location: Midland, TX Posts: 3,884 Drives: 11 370Z PW M6 Rep Power: 23	That is crazy I thought they would be a Garrett type or something. Sent with TapAhoe __________________ 10secWS6 IF YOU CAN'T SWING IT THEN DON'T BRING IT! Check out Domestic Performance C.C.

07-13-2013, 06:10 PM	#1125 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	Isn't the hot side cast into the manifold? __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

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