GTM Performance Engineering: GTM TD05 16G Test Results 91 Octane 7AT

sloboi · 07-07-2012, 03:56 AM

Quote:

Originally Posted by SAM@GTM

Awesomecakes. Looking forward to getting this on my car!

Scribe · 07-18-2012, 11:29 AM

I'm super excited to see such a well matched kit for the stock VQ37 and happy that GTM didn't nerf the results in order to prevent cannibalization of their larger turbo kit. I was also concerned by the idea of cutting costs, but GTM have shown they don't cut corners and it is encouraging to see the results.

Some smaller turbo or supercharger kits exclude blowoff valves. Running 10 psi I'm happy to see they are present. But that leads me to ask about running 10 psi on the stock rods, especially on 91 which detonates almost as soon as you put it in your gas tank.

Some people seem to be finding the upper limit of these rods to be around 550whp and I would have concerns about longevity. Are there any concerns from you guys at GTM? I live the in the land of 93, and probably wouldn't want to run more than 9 psi, but could see an issue where people tune their cars to run 11-12 psi on 93 octane and then throw a rod through the side of their block.

FPenvy · 07-18-2012, 11:39 AM

Quote:

Originally Posted by Scribe

I'm super excited to see such a well matched kit for the stock VQ37 and happy that GTM didn't nerf the results in order to prevent cannibalization of their larger turbo kit. I was also concerned by the idea of cutting costs, but GTM have shown they don't cut corners and it is encouraging to see the results.

Some smaller turbo or supercharger kits exclude blowoff valves. Running 10 psi I'm happy to see they are present. But that leads me to ask about running 10 psi on the stock rods, especially on 91 which detonates almost as soon as you put it in your gas tank.

Some people seem to be finding the upper limit of these rods to be around 550whp and I would have concerns about longevity. Are there any concerns from you guys at GTM? I live the in the land of 93, and probably wouldn't want to run more than 9 psi, but could see an issue where people tune their cars to run 11-12 psi on 93 octane and then throw a rod through the side of their block.

I'm interested in this too since I only have ran 93 octane through my car and plan on continuing to do that after I would do a TT kit

Scribe · 07-18-2012, 01:15 PM

Quote:

Originally Posted by FPenvy

I'm interested in this too since I only have ran 93 octane through my car and plan on continuing to do that after I would do a TT kit

My comment below isn't directed at you specifically, but is more of a generalization.

Running 93 won't be an issue as long as you are willing to keep the boost down to safe levels. The advantage you will see with 93 octane is a safer margin against detonation which is well worth losing a few inches in the pissing contest of dyno numbers. Just because you can turn the boost way up doesn't mean it makes sense. That's why I dislike the larger turbo kits for an unmodified VQ37. I don't need a huge turbo since I can't push more than 550whp anyway. I'll take the quicker spool all day over bragging rights about how much power two giant turbos could make.

Now if you are looking to future-proof your build, buying the larger kit may make sense. I would still argue there's tons of usable power left on the table with these turbos if you threw in beefier rods and lowered the compression.

FPenvy · 07-18-2012, 01:26 PM

Quote:

Originally Posted by Scribe

My comment below isn't directed at you specifically, but is more of a generalization.

Running 93 won't be an issue as long as you are willing to keep the boost down to safe levels. The advantage you will see with 93 octane is a safer margin against detonation which is well worth losing a few inches in the pissing contest of dyno numbers. Just because you can turn the boost way up doesn't mean it makes sense. That's why I dislike the larger turbo kits for an unmodified VQ37. I don't need a huge turbo since I can't push more than 550whp anyway. I'll take the quicker spool all day over bragging rights about how much power two giant turbos could make.

Now if you are looking to future-proof your build, buying the larger kit may make sense. I would still argue there's tons of usable power left on the table with these turbos if you threw in beefier rods and lowered the compression.

lots of good info

i agree with what youre saying. the main problem i'm running into right now is not only comin up with the money for the TT kit but also the transmission upgrades since i would really like to be able to have a fully functioning car rather than losing the higher gears just for high HP numbers lol

this new kit is amazing though. lots of power in a small package.

Scribe · 07-18-2012, 01:35 PM

Quote:

Originally Posted by FPenvy

lots of good info

i agree with what youre saying. the main problem i'm running into right now is not only comin up with the money for the TT kit but also the transmission upgrades since i would really like to be able to have a fully functioning car rather than losing the higher gears just for high HP numbers lol

this new kit is amazing though. lots of power in a small package.

Don't forget to factor in a very nice boost controller. Speaking of which, I don't remember seeing anything about whether this car had one or not. I'd be interested to see both the boost and afr overlays for the dyno pulls.

I know that turbos work off of the pressure differential between the exhaust manifold and exhaust and that the best exhaust for a turbo is no exhaust. Still I would like to see what high flow cats and a straight-through style exhaust can achieve.

I also am curious if there is a divider within the down-pipe to keep some separate of the exhaust from the internal wastegate.

FPenvy · 07-18-2012, 01:42 PM

Quote:

Originally Posted by Scribe

Don't forget to factor in a very nice boost controller. Speaking of which, I don't remember seeing anything about whether this car had one or not. I'd be interested to see both the boost and afr overlays for the dyno pulls.

I know that turbos work off of the pressure differential between the exhaust manifold and exhaust and that the best exhaust for a turbo is no exhaust. Still I would like to see what high flow cats and a straight-through style exhaust can achieve.

I also am curious if there is a divider within the down-pipe to keep some separate of the exhaust from the internal wastegate.

all questions someone from GTM will have to answer but i'm interesting in for all those answers too.

personally i wouldnt mind running no exhaust since the turbos are kinda mufflers already. then again i just like very loud and mean sounding exhaust on cars hence my non-res set-up which still isnt as loud as i'd like.

Wattles · 07-20-2012, 08:44 AM

Quote:

Originally Posted by Scribe

Don't forget to factor in a very nice boost controller. Speaking of which, I don't remember seeing anything about whether this car had one or not. I'd be interested to see both the boost and afr overlays for the dyno pulls.

it's a Blitz SBC with remote control on the steering wheel.
Fun stuff

KaienZ34 · 07-18-2012, 11:40 AM

Yeah there is nothing but 89 and 93 here.

XwChriswX · 07-20-2012, 01:23 AM

Will you see a performance loss from using the 2 coolers and the crash bar blocking them vs one single cooler without the crashbar as in the previous kit? Although I do really like the idea of retaining the crash bar for safety purposes.

KaienZ34 · 07-20-2012, 07:59 AM

Quote:

Originally Posted by XwChriswX

Will you see a performance loss from using the 2 coolers and the crash bar blocking them vs one single cooler without the crashbar as in the previous kit? Although I do really like the idea of retaining the crash bar for safety purposes.

Plus keeping the tow hook.

Dembflyr · 07-20-2012, 02:25 PM

Do you have pricing for this kit yet? I am in the process of selling my Z and am thinking a nice TT G sedan would be fun.

TrinityRacer · 07-25-2012, 09:06 PM

Updates? I'm looking forward to the official release with pricing etc.

ZtoG37 · 07-26-2012, 12:59 AM

I spoke to them about the release date , looking like end of August or September.

Nixlimited · 07-27-2012, 01:46 PM

Quote:

Originally Posted by ZtoG37

I spoke to them about the release date , looking like end of August or September.

Aren't they working on an 18G kit too? Can't wait to see pricing on these kits.

07-18-2012, 11:40 AM	#9 (permalink)
KaienZ34 A True Z Fanatic Join Date: Oct 2009 Location: LA. not L.a. Posts: 21,652 Drives: Z34 Tour/Sport Rep Power: 178	Yeah there is nothing but 89 and 93 here. __________________ *"These Violent Delights Have Violent Ends"* http://www.the370z.com/members/kaienz34-albums-z34.html

07-20-2012, 01:23 AM	#10 (permalink)
XwChriswX WFLYIDNNE Join Date: Jul 2009 Location: In The Fastlane Posts: 50,648 Drives: 02 GDB WRX Rep Power: 452	Will you see a performance loss from using the 2 coolers and the crash bar blocking them vs one single cooler without the crashbar as in the previous kit? Although I do really like the idea of retaining the crash bar for safety purposes. __________________ Bonnie - Stage 2, Audio build coming this fall! R.I.P. Abby 3/29/10 - 3/30/14

07-20-2012, 02:25 PM	#12 (permalink)
Dembflyr Track Member Join Date: Feb 2010 Location: Indiana Posts: 886 Drives: G37S Sedan Rep Power: 17	Do you have pricing for this kit yet? I am in the process of selling my Z and am thinking a nice TT G sedan would be fun. __________________ 2012 G37S Sedan 6MT - Project Practicality 2009-6MT-Sport/Touring-Dembflyr's Journal-TT Build Thread-CAR IS SOLD

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
GTM Performance Engineering:PROJECT: VQ42VHR S/C	SAM@GTM	Forced Induction	32	06-01-2012 11:38 PM
GTM Performance Engineering VQ45VHR-Our Journey to The 1000 HP and Beyond	SAM@GTM	Forced Induction	1588	08-20-2011 11:19 AM
GTM Performance Engineering Supercharger CARB kit Test Car Needed	SAM@GTM	Southern California Region	11	11-09-2010 07:02 PM
GTM Performance Engineering Supercharger CARB kit Test Car Needed	SAM@GTM	Forced Induction	26	10-14-2010 02:49 PM
GTM Performance Engineering & Forged Performance	azn370z	Forced Induction	59	04-14-2010 12:07 AM

07-18-2012, 11:29 AM	#2 (permalink)
Scribe Base Member Join Date: Jan 2009 Location: Houston, TX. Posts: 182 Drives: Touring-Sport-Manual Rep Power: 221	I'm super excited to see such a well matched kit for the stock VQ37 and happy that GTM didn't nerf the results in order to prevent cannibalization of their larger turbo kit. I was also concerned by the idea of cutting costs, but GTM have shown they don't cut corners and it is encouraging to see the results. Some smaller turbo or supercharger kits exclude blowoff valves. Running 10 psi I'm happy to see they are present. But that leads me to ask about running 10 psi on the stock rods, especially on 91 which detonates almost as soon as you put it in your gas tank. Some people seem to be finding the upper limit of these rods to be around 550whp and I would have concerns about longevity. Are there any concerns from you guys at GTM? I live the in the land of 93, and probably wouldn't want to run more than 9 psi, but could see an issue where people tune their cars to run 11-12 psi on 93 octane and then throw a rod through the side of their block.

07-25-2012, 09:06 PM	#13 (permalink)
TrinityRacer Base Member Join Date: Apr 2011 Location: NJ Posts: 34 Drives: 2011 MB Nismo 370Z Rep Power: 15	Updates? I'm looking forward to the official release with pricing etc.

07-26-2012, 12:59 AM	#14 (permalink)
ZtoG37 Base Member Join Date: Jan 2012 Location: East End Posts: 247 Drives: 2008 Infiniti G37S Rep Power: 14	I spoke to them about the release date , looking like end of August or September.