GTM Performance Engineering: MHI Twin Turbo Official Release

SPOHN · 10-30-2013, 05:06 PM

It should be posted this week

Mike@GTM · 10-30-2013, 06:04 PM

Update: Things are moving along. Some of our guys are in Detroit for training on the mandrel bending machine this week. We anticipate the dies being shipped sometime early next week so we'll have them in hand within a week and a half or so. Once we have the dies, then BLM will be sending a tech out to get our bender up and running so we can start bending some pipes.

Also, our casting company assures us that they are on schedule.

As for the other thread on the initial test car, we have that on our "to do" list and will be releasing that as soon as Sam and I have some time to focus on it.

BlkNismo · 11-05-2013, 02:09 AM

question regarding the tuning aspect.....the base tune that comes with the turn key kit, is this only set for default wastegate pressure, assuming aprox 6psi?

i plan on running a ebc around 7 or 8psi. does this require the tune to be refined?

esfourteen · 11-05-2013, 08:34 AM

Quote:

Originally Posted by BlkNismo

question regarding the tuning aspect.....the base tune that comes with the turn key kit, is this only set for default wastegate pressure, assuming aprox 6psi?

i plan on running a ebc around 7 or 8psi. does this require the tune to be refined?

GTM tunes the way most do for these cars using the MAF, so turning up the boost a few psi will not require a retune. fuel will adjust based on maf flow and timing shouldn't need to be retarded until you're running much higher boost levels

BlkNismo · 11-05-2013, 03:58 PM

Quote:

Originally Posted by esfourteen

GTM tunes the way most do for these cars using the MAF, so turning up the boost a few psi will not require a retune. fuel will adjust based on maf flow and timing shouldn't need to be retarded until you're running much higher boost levels

Thanks buddy.

Dzel · 11-05-2013, 08:54 AM

You said retarted! Lol

Sent with TapAhoe

m3chhawk · 11-05-2013, 08:57 AM

Quote:

Originally Posted by Dzel

You said retarted! Lol

Sent with TapAhoe

Actually he said retarded....

Dzel · 11-05-2013, 10:48 AM

Lmao I love this forum sometimes

Sent with TapAhoe

Tb09z · 11-05-2013, 11:02 AM

Good stuff lol

Dzel · 11-07-2013, 09:34 PM

Soooooo.... yup.

Sent with TapAhoe

Alkatraz · 11-07-2013, 09:48 PM

Pre TT Kit Dyno Day tomorrow......

3 power runs for $30

It's going to be a long gap between these dyno runs and the post TT install runs but it will at least give me some ballpark idea of the gains.

Wattles · 11-12-2013, 07:43 AM

The car is running strong at 550+ WHP.

I got the car back and have been driving around with tons of power. Did my first oil change at 1k miles. The engine is strong. I can burn the tires at 60 on the freeway.

The stage four transmission shifts like a dream. Hard shifts at full throttle and softer with regular driving. I feel like it can handle the power that the engine puts out now. The stock Trans with valve body upgrade always felt like it was slipping in higher gears (3rd - 5th). I was afraid the stage four would hit like-a-truck in 1st to second transition, but it really is firm, but smooth.

The engine rebuild (stage 1 GTM long block) seems to have added roughly 100whp and runs super-strong. The drivability is really nice.

I am really hopeful that I am going to get 10s of thousands of trouble free miles out of the new setup.

One or two minor issues (which I think are bein worked out in the production setup).
1) the driver's side air return (from the Tial blow off valves) is rubbing slightly on the wheel well at full throttle (max power). This is annoying, but seems to be fairly cosmetic/annoying. I think the only fix for this is a redesign/shortening of the pipe.
2) I have developed a whistle/whine at boost. This sounds like a full ballon being pulled tight while letting air out (the sound your kids love to make with a ballon as they let air out). I'm not noticing loss of boost, but I fear a fitting or line to/from the boost controller has a leak.
I'll have to do a line pressure check.

All in all I am prety happy with the power (having upgraded to the Garett turbos) and (unfortunately) having to build the engine.

Takeaways:
When all is said and done,
- the engine is super powerful.
- The craftsmanship is amazing,
- the drivability is superb,
- the car is a blast to drive,
- the project always seems "almost complete" (If I can solve the rubbing and whistle it will be show ready - it's hard to take someone for a ride and have to explain noises

)
- expect MANY delays and at least double your original budget
- your car will forever be a project car (have a backup)
- the stage 4 transmission is quite good
- wives have about 1/4 the patience you have

puckshaw · 11-12-2013, 07:50 AM

Quote:

Originally Posted by Wattles

The car is running strong at 550+ WHP.

I got the car back and have been driving around with tons of power. Did my first oil change at 1k miles. The engine is strong. I can burn the tires at 60 on the freeway.

The stage four transmission shifts like a dream. Hard shifts at full throttle and softer with regular driving. I feel like it can handle the power that the engine puts out now. The stock Trans with valve body upgrade always felt like it was slipping in higher gears (3rd - 5th). I was afraid the stage four would hit like-a-truck in 1st to second transition, but it really is firm, but smooth.

The engine rebuild (stage 1 GTM long block) seems to have added roughly 100whp and runs super-strong. The drivability is really nice.

I am really hopeful that I am going to get 10s of thousands of trouble free miles out of the new setup.

One or two minor issues (which I think are bein worked out in the production setup).
1) the driver's side air return (from the Tial blow off valves) is rubbing slightly on the wheel well at full throttle (max power). This is annoying, but seems to be fairly cosmetic/annoying. I think the only fix for this is a redesign/shortening of the pipe.
2) I have developed a whistle/whine at boost. This sounds like a full ballon being pulled tight while letting air out (the sound your kids love to make with a ballon as they let air out). I'm not noticing loss of boost, but I fear a fitting or line to/from the boost controller has a leak.
I'll have to do a line pressure check.

All in all I am prety happy with the power (having upgraded to the Garett turbos) and (unfortunately) having to build the engine.

Takeaways:
When all is said and done,
- the engine is super powerful.
- The craftsmanship is amazing,
- the drivability is superb,
- the car is a blast to drive,
- the project always seems "almost complete" (If I can solve the rubbing and whistle it will be show ready - it's hard to take someone for a ride and have to explain noises

)
- expect MANY delays and at least double your original budget
- your car will forever be a project car (have a backup)
- the stage 4 transmission is quite good
- wives have about 1/4 the patience you have

Why did you have to build the block? How much boost are you running? IWG?

Wattles · 11-13-2013, 06:55 AM

Quote:

Originally Posted by puckshaw

Why did you have to build the block? How much boost are you running? IWG?

Some issues with internals developed. Nothing catostophic, but required engine crack open, so I chose to build the block with the ank cost of cracking the engine anyway.
Originally was at 11psi. After the build I'm running 13psi.

Current results:

Mkai0 · 11-12-2013, 01:55 PM

I completely understand where you are coming from. After working out all of the kinks with my Stage 1.5 SC and finally getting everything perfect, I am slightly apprehensive about doing a full engine build and TT kit. A lot of things to account for when doing massive builds like this. Did you upgrade your Mass Airflow Sensors for your build?

Quote:

Originally Posted by Wattles

The car is running strong at 550+ WHP.

I got the car back and have been driving around with tons of power. Did my first oil change at 1k miles. The engine is strong. I can burn the tires at 60 on the freeway.

The stage four transmission shifts like a dream. Hard shifts at full throttle and softer with regular driving. I feel like it can handle the power that the engine puts out now. The stock Trans with valve body upgrade always felt like it was slipping in higher gears (3rd - 5th). I was afraid the stage four would hit like-a-truck in 1st to second transition, but it really is firm, but smooth.

The engine rebuild (stage 1 GTM long block) seems to have added roughly 100whp and runs super-strong. The drivability is really nice.

I am really hopeful that I am going to get 10s of thousands of trouble free miles out of the new setup.

One or two minor issues (which I think are bein worked out in the production setup).
1) the driver's side air return (from the Tial blow off valves) is rubbing slightly on the wheel well at full throttle (max power). This is annoying, but seems to be fairly cosmetic/annoying. I think the only fix for this is a redesign/shortening of the pipe.
2) I have developed a whistle/whine at boost. This sounds like a full ballon being pulled tight while letting air out (the sound your kids love to make with a ballon as they let air out). I'm not noticing loss of boost, but I fear a fitting or line to/from the boost controller has a leak.
I'll have to do a line pressure check.

All in all I am prety happy with the power (having upgraded to the Garett turbos) and (unfortunately) having to build the engine.

Takeaways:
When all is said and done,
- the engine is super powerful.
- The craftsmanship is amazing,
- the drivability is superb,
- the car is a blast to drive,
- the project always seems "almost complete" (If I can solve the rubbing and whistle it will be show ready - it's hard to take someone for a ride and have to explain noises

)
- expect MANY delays and at least double your original budget
- your car will forever be a project car (have a backup)
- the stage 4 transmission is quite good
- wives have about 1/4 the patience you have

10-30-2013, 05:06 PM	#1 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 47 Posts: 14,844 Drives: Waiting on next Z Rep Power: 223	It should be posted this week __________________

11-05-2013, 08:54 AM	#6 (permalink)
Dzel A True Z Fanatic Join Date: May 2011 Location: Midland, TX Posts: 3,884 Drives: 11 370Z PW M6 Rep Power: 25	You said retarted! Lol Sent with TapAhoe __________________ 10secWS6 IF YOU CAN'T SWING IT THEN DON'T BRING IT! Check out Domestic Performance C.C.

11-05-2013, 10:48 AM	#8 (permalink)
Dzel A True Z Fanatic Join Date: May 2011 Location: Midland, TX Posts: 3,884 Drives: 11 370Z PW M6 Rep Power: 25	Lmao I love this forum sometimes Sent with TapAhoe __________________ 10secWS6 IF YOU CAN'T SWING IT THEN DON'T BRING IT! Check out Domestic Performance C.C.

11-07-2013, 09:34 PM	#10 (permalink)
Dzel A True Z Fanatic Join Date: May 2011 Location: Midland, TX Posts: 3,884 Drives: 11 370Z PW M6 Rep Power: 25	Soooooo.... yup. Sent with TapAhoe __________________ 10secWS6 IF YOU CAN'T SWING IT THEN DON'T BRING IT! Check out Domestic Performance C.C.

11-12-2013, 07:43 AM	#12 (permalink)
Wattles Base Member Join Date: Jul 2012 Location: California Posts: 57 Drives: 2012 G37 IPL 7AT TT Rep Power: 14	1,100 mile update The car is running strong at 550+ WHP. I got the car back and have been driving around with tons of power. Did my first oil change at 1k miles. The engine is strong. I can burn the tires at 60 on the freeway. The stage four transmission shifts like a dream. Hard shifts at full throttle and softer with regular driving. I feel like it can handle the power that the engine puts out now. The stock Trans with valve body upgrade always felt like it was slipping in higher gears (3rd - 5th). I was afraid the stage four would hit like-a-truck in 1st to second transition, but it really is firm, but smooth. The engine rebuild (stage 1 GTM long block) seems to have added roughly 100whp and runs super-strong. The drivability is really nice. I am really hopeful that I am going to get 10s of thousands of trouble free miles out of the new setup. One or two minor issues (which I think are bein worked out in the production setup). 1) the driver's side air return (from the Tial blow off valves) is rubbing slightly on the wheel well at full throttle (max power). This is annoying, but seems to be fairly cosmetic/annoying. I think the only fix for this is a redesign/shortening of the pipe. 2) I have developed a whistle/whine at boost. This sounds like a full ballon being pulled tight while letting air out (the sound your kids love to make with a ballon as they let air out). I'm not noticing loss of boost, but I fear a fitting or line to/from the boost controller has a leak. I'll have to do a line pressure check. All in all I am prety happy with the power (having upgraded to the Garett turbos) and (unfortunately) having to build the engine. Takeaways: When all is said and done, - the engine is super powerful. - The craftsmanship is amazing, - the drivability is superb, - the car is a blast to drive, - the project always seems "almost complete" (If I can solve the rubbing and whistle it will be show ready - it's hard to take someone for a ride and have to explain noises ) - expect MANY delays and at least double your original budget - your car will forever be a project car (have a backup) - the stage 4 transmission is quite good - wives have about 1/4 the patience you have __________________ 2012 G37 IPL 7AT \| GTM Stage 1 Long Block \| GTM Stage 1 Garett TT \| Blitz SBC typeR Boost Controller \| GTM Stage 4 Transmission \| Tial BOV \| Fast Intentions exhaust \| GTM 8qt Oil Pan \| 583whp/484trq @ 13psi

10-30-2013, 06:04 PM	#2 (permalink)
Mike@GTM Not an active Vendor. DO NOT BUY Join Date: Sep 2009 Location: California Posts: 391 Drives: '13 Hot Lava FR-S Rep Power: 18	Update: Things are moving along. Some of our guys are in Detroit for training on the mandrel bending machine this week. We anticipate the dies being shipped sometime early next week so we'll have them in hand within a week and a half or so. Once we have the dies, then BLM will be sending a tech out to get our bender up and running so we can start bending some pipes. Also, our casting company assures us that they are on schedule. As for the other thread on the initial test car, we have that on our "to do" list and will be releasing that as soon as Sam and I have some time to focus on it.

11-05-2013, 02:09 AM	#3 (permalink)
BlkNismo Track Member Join Date: Sep 2011 Location: USA Posts: 614 Drives: Nismo Rep Power: 16	question regarding the tuning aspect.....the base tune that comes with the turn key kit, is this only set for default wastegate pressure, assuming aprox 6psi? i plan on running a ebc around 7 or 8psi. does this require the tune to be refined?

11-05-2013, 11:02 AM	#9 (permalink)
Tb09z Base Member Join Date: Apr 2013 Location: Louisiana Posts: 190 Drives: 09-370-blue -m6 Rep Power: 14	Good stuff lol

11-07-2013, 09:48 PM	#11 (permalink)
Alkatraz Base Member Join Date: May 2013 Location: Perth Posts: 215 Drives: 2008 Skyline 370GT Rep Power: 14	Pre TT Kit Dyno Day tomorrow...... 3 power runs for $30 It's going to be a long gap between these dyno runs and the post TT install runs but it will at least give me some ballpark idea of the gains.

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