GTM Performance Engineering: MHI Twin Turbo Official Release

SPOHN · 11-09-2013, 05:52 AM

Dyno jet would be about 295. Tuned maybe as high as 310. But all that doesn't matter.

Alstann · 11-09-2013, 07:17 AM

Hopefully we get an update on if the casting parts will be still arriving on time, and the bender is running full tilt?

SPOHN · 11-11-2013, 09:33 PM

F'ing frustrated.

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?

megalapagas · 11-12-2013, 08:16 AM

Post a vid?

Dzel · 11-12-2013, 08:29 AM

vids man we need vids

SPOHN · 11-12-2013, 09:40 AM

At least one person is happy. I've yet to get four promised phone calls back. Getting super pissed. I'm really sick of this. I get treated good but damn.

SPOHN · 11-12-2013, 10:27 AM

I'm at the point of building my short block. Get some H beam rods and pistons. Rebalance the crank.

Alstann · 11-12-2013, 11:18 AM

Spohn going hard!

I'm just hoping for a update and a ship date before this month.

SPOHN · 11-12-2013, 11:21 AM

^ me too brother.

Infidel · 11-12-2013, 11:41 AM

I should of just got the 1.5 SC, I would be back from my trip to Georgia/Z1 by now and having fun with my non-nutless Z

Chuck33079 · 11-12-2013, 11:51 AM

Quote:

Originally Posted by Infidel

I should of just got the 1.5 SC, I would be back from my trip to Georgia/Z1 by now and having fun with my non-nutless Z

Will they not let you change your order?

Dzel · 11-12-2013, 12:16 PM

I'm getting ready to get my money back trade In the z and get something with more hp

Sent with TapAhoe

SPOHN · 11-12-2013, 12:21 PM

Quote:

Originally Posted by Dzel

I'm getting ready to get my money back trade In the z and get something with more hp

Sent with TapAhoe

Ok Baer. Lol

11-09-2013, 05:52 AM	#1891 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	Dyno jet would be about 295. Tuned maybe as high as 310. But all that doesn't matter. __________________

11-09-2013, 07:17 AM	#1892 (permalink)
Alstann Track Member Join Date: Oct 2011 Location: South Florida Posts: 882 Drives: 12 PW 370z 6MT Sport Rep Power: 14	Hopefully we get an update on if the casting parts will be still arriving on time, and the bender is running full tilt? Mkai0 likes this. __________________ 2012 Pearl White 370Z GReddy Twin Turbo

11-11-2013, 09:33 PM	#1893 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	F'ing frustrated. Footloose301, elperuano, Alstann and 1 others like this. __________________

11-12-2013, 07:43 AM	#1894 (permalink)
Wattles Base Member Join Date: Jul 2012 Location: California Posts: 57 Drives: 2012 G37 IPL 7AT TT Rep Power: 12	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 fuct, Mkai0, Dzel and 1 others like this. __________________ 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

11-12-2013, 08:16 AM	#1896 (permalink)
megalapagas Enthusiast Member Join Date: May 2013 Location: McAllen,TX Posts: 457 Drives: '10 370Z Tour A/T Rep Power: 12	Post a vid? Dzel likes this. __________________ 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 \|

11-12-2013, 08:29 AM	#1897 (permalink)
Dzel A True Z Fanatic Join Date: May 2011 Location: Midland, TX Posts: 3,884 Drives: 11 370Z PW M6 Rep Power: 23	vids man we need vids __________________ 10secWS6 IF YOU CAN'T SWING IT THEN DON'T BRING IT! Check out Domestic Performance C.C.

11-12-2013, 09:40 AM	#1898 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	At least one person is happy. I've yet to get four promised phone calls back. Getting super pissed. I'm really sick of this. I get treated good but damn. Dzel and elperuano like this. __________________

11-12-2013, 10:27 AM	#1899 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	I'm at the point of building my short block. Get some H beam rods and pistons. Rebalance the crank. __________________

11-12-2013, 11:18 AM	#1900 (permalink)
Alstann Track Member Join Date: Oct 2011 Location: South Florida Posts: 882 Drives: 12 PW 370z 6MT Sport Rep Power: 14	Spohn going hard! I'm just hoping for a update and a ship date before this month. __________________ 2012 Pearl White 370Z GReddy Twin Turbo

11-12-2013, 11:21 AM	#1901 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	^ me too brother. __________________

11-12-2013, 11:41 AM	#1902 (permalink)
Infidel Enthusiast Member Join Date: Mar 2013 Location: Central Florida Posts: 457 Drives: 2013 GM 6MT Rep Power: 14	I should of just got the 1.5 SC, I would be back from my trip to Georgia/Z1 by now and having fun with my non-nutless Z

11-12-2013, 12:16 PM	#1904 (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'm getting ready to get my money back trade In the z and get something with more hp Sent with TapAhoe Footloose301, Mkai0, DEpointfive0 and 1 others like this. __________________ 10secWS6 IF YOU CAN'T SWING IT THEN DON'T BRING IT! Check out Domestic Performance C.C.

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