GTM supercharger DYNO

KaienZ34 · 12-14-2010, 03:14 PM

This is looking so good ...

toner123 · 12-14-2010, 03:17 PM

I think tomorrow I will go dyno my car. I have yet to do that since Sam sent me my new tune a while back. I am interested to see what it does.
Frank

puckshaw · 12-14-2010, 04:26 PM

Awesome results! Glad to hear the fluttering has been resolved. I'm real close to putting money down on this kit...

wishihadnav · 12-14-2010, 04:36 PM

^^dooo it..you wont be disappointed.

Kastley85891 · 12-14-2010, 04:51 PM

I wanted TT from GTM, but now... looks very attractive

Jamaica · 12-14-2010, 05:11 PM

Quote:

Originally Posted by theDreamer

I believe the big tubro project right now is using a FCON by HKS so that might be what they end up testing with initially.

you are correct.

puckshaw · 12-14-2010, 05:45 PM

Quote:

Originally Posted by wishihadnav

^^dooo it..you wont be disappointed.

Yeah I'm about to be getting back home from a work assignment in Europe. There's a chance I'll have to go back for a few more months so I need to see how that pans out first.

SAM@GTM · 12-14-2010, 06:33 PM

Quote:

Originally Posted by Nixlimited

You mentioned you have test cars at the shop. Do you have a S/C and TT test car? I would love to get a feel for these both as I am trying to decide what car to get this spring and a GTM'ed 370Z is in a dead-heat with an EVO X.

It could be arranged we just need to know ahead of time. This guy here got lucky and we were able to accomdate him when he stopped by .

Quote:

Originally Posted by Aldweik

In California for a couple of days, I stopped by GTM to check out their go-fast goods for the Fairlady. I was lucky enough to find Sam available to chitchat and not busy solving the world's Z ailments over the phone or otherwise.....

I got to

the stg1 supercharged and stg1 twin turbocharged shop-monster back to back around the block and WoW!!! Be warned, you will hate your stock car.......

Both cars are very tidy under the hood with a seamless integration of electronics, they could have come from Nissan that way, both idle well, quiet, tame and civilized in traffic.... The S-charged car delivers the power in a very linear fashion resembling the stock power curve but higher and significantly better up top.... a lot more power on demand. This bolt-on setup is very livable for daily use and a ton of controlled fun, as if you dropped a V8 in the Z, a serious transformation guaranteed to keep you grinning

The Turbo is a hooligan, especially in the low gears, the VDC will completely cut you off at WOT and if you turn it off without the GTM-tuned traction control system, you better know what you're doing!!! Guaranteed to satisfy any mad power craving if the supercharged doesn't do it, either way, you would have to relearn how to drive your car... the character and limitations change.

I'm gonna hold off on discussing my plans for the Z until they become a reality, thanks GTM

Nitex · 12-14-2010, 07:03 PM

Damn Sam, i think you just made my mind up for me! Great work and congratz to the op. Ill be in contact next month or so sam

SAM@GTM · 12-14-2010, 07:04 PM

Quote:

Originally Posted by One_Quick_Z

This looks like its going to work great! Nice video there is no Apache sound anymore.... Sam you never stop outdoing yourself.

DAN

The credit really goes to the whole team at GTM. We all work very hard to deliver the best possible product. All the way from our parts department to our research, development, and design department, to our tech support department to tuning department.

This is a concerted effort between many people with various skills to make this whole thing possible. We would also like to thank our loyal customers who have helped us with their feedback to further refine our products to deliver the absolute best that money can buy.

So congratulations to everyone for making the GTM Supercharger Kit #1!!!

christian370z · 12-14-2010, 07:34 PM

Quote:

Originally Posted by SAM@GTM

So congratulations to everyone for making the GTM Supercharger Kit #1!!!

The hard work pays off eh? The proof is always in the pudding!

SAM@GTM · 12-14-2010, 07:58 PM

Quote:

Originally Posted by Fezzik

Yeah I figured I'd go ahead and create a new thread with for the dyno since So many people are asking for it well here it is
First 2 runs are in 4th gear
Second run is in 3rd gear
Forth run is in 5th gear
62.7 F
29.7 in Hg
Dynojet AWD dyno not the 2wd only done at P&L motorsports here in Chicago
EDIT: NO MODS THIS IS STOCK EXHAUST (no cats removed) and also the wideband was place in the rear.

And to compare with the before.

David,

Thank you for posting this information up and being part of the solution.

I'd just like to make some comments on your graphs. Your power and torque look outstanding, but the afr looks odd. The target afr is to be 11.8 on average from the point the car goes into open loop. I did notice on your graphs the afr on each run got progressively worse toward the top end. Usually that is an indication that the exhaust sniffer coming off the tailpipe was being pushed backwards. It is very difficult to secure the sniffer in the factory tip. Ideally, it is best to collect afr data right before the cat. Collecting after the cat is ok, so long as you realize that it will read leaner than it actually is. Based on the logs I have from you from the factory widebands right before the cats, the afr was on target (11.8) all the way to redline, which is exactly where we want it to be.

It has been our experience as well that the bends right before the tip on the factory muffler significantly throw off the readings at higher power levels.

At stock power levels, the exhaust gas velocity is low enough to make the turn and still flow somewhat evenly (at least unnoticed by the sniffer). However, as exhaust gas velocity increases at higher horsepower levels, the exhaust gas has more momentum and therefore, doesn't flow through the bend evenly. Therefore, at higher power levels, the sniffer is reading a small quantity of fresh air that fills the low pressure zone created on the inside of the bend between each pulse of exhaust gas.

We've tuned hundreds of Z's and witnessed this phenomenon, time and again.

Here are some visual aids to help you guys understand what we're saying here:

toner123 · 12-14-2010, 08:13 PM

hey sam on a car with after market exhaust and test pipes is it ok to go from the tail exhaust then or will that also cause to have a lean apearance. Also I would imagine that the 11.8 is the same for both TT and S/C cars. So at what point does the AFR start to become not so optimal to you guys? Finnal question when running data logs I know you mentioned before that they tend to read a little higher then what it really is, so does the little higher varry between each car or is there a set formula you guys use once you get the afr off the ECU. Sorry for all the questions but found this to be a great opertunity to educate my self. Thanks
Frank

Fezzik · 12-14-2010, 08:13 PM

Awesome clarification Sam. I would like to thank the whole team at GTM for a wonderful job and the wonderful product I have. I have to recommend to anybody the customer support is awesome. If I ever had a question, they were there to answer it. A good product is nothing without customer support and this company has both!

NYBladeZ · 12-14-2010, 08:42 PM

Quote:

Originally Posted by SAM@GTM

We will be testing across the board, N.A, SC.TURBO and big Turbo set up "cough cough " white dragon project .

Sam

This news definitely made my day, VVEL has greatly limited tuning and I'm blown away by this news. My only question/concern is that will it be via uprev or will those already with uprev be forced to opt for a completely new possibly standalone setup. While I want vvel cracked standalone engine management is $$$$.

12-14-2010, 03:14 PM	#91 (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	This is looking so good ... __________________ *"These Violent Delights Have Violent Ends"* http://www.the370z.com/members/kaienz34-albums-z34.html

12-14-2010, 04:51 PM	#95 (permalink)
Kastley85891 A True Z Fanatic Join Date: Nov 2009 Location: ATX 370 - Sold Posts: 1,149 Drives: 2003 Wagon Rep Power: 18	I wanted TT from GTM, but now... looks very attractive __________________ Boosted V8 hunter 2850 lbs and 375WHP

12-14-2010, 07:03 PM	#99 (permalink)
Nitex Track Member Join Date: Jan 2010 Location: Seattle Posts: 848 Drives: '13 GTI Stage 2 UNI Rep Power: 16	Damn Sam, i think you just made my mind up for me! Great work and congratz to the op. Ill be in contact next month or so sam __________________ 2013 Drivers ED GTI \| Stage 2 Unitronic

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12-14-2010, 03:17 PM	#92 (permalink)
toner123 Track Member Join Date: May 2010 Location: chesapeake va Age: 39 Posts: 823 Drives: TT 370z Touring/SP Rep Power: 16	I think tomorrow I will go dyno my car. I have yet to do that since Sam sent me my new tune a while back. I am interested to see what it does. Frank

12-14-2010, 04:26 PM	#93 (permalink)
puckshaw Track Member Join Date: Nov 2009 Location: Charlotte, NC Posts: 620 Drives: 09 PW 370Z Touring Rep Power: 17	Awesome results! Glad to hear the fluttering has been resolved. I'm real close to putting money down on this kit...

12-14-2010, 04:36 PM	#94 (permalink)
wishihadnav A True Z Fanatic Join Date: Nov 2009 Location: 90090 Posts: 1,851 Drives: Force Fed Nismo Rep Power: 183	^^dooo it..you wont be disappointed.

12-14-2010, 08:13 PM	#103 (permalink)
toner123 Track Member Join Date: May 2010 Location: chesapeake va Age: 39 Posts: 823 Drives: TT 370z Touring/SP Rep Power: 16	hey sam on a car with after market exhaust and test pipes is it ok to go from the tail exhaust then or will that also cause to have a lean apearance. Also I would imagine that the 11.8 is the same for both TT and S/C cars. So at what point does the AFR start to become not so optimal to you guys? Finnal question when running data logs I know you mentioned before that they tend to read a little higher then what it really is, so does the little higher varry between each car or is there a set formula you guys use once you get the afr off the ECU. Sorry for all the questions but found this to be a great opertunity to educate my self. Thanks Frank

12-14-2010, 08:13 PM	#104 (permalink)
Fezzik Base Member Join Date: Jun 2010 Location: Chicago Posts: 182 Drives: G37 Vert 6mt White Rep Power: 15	Awesome clarification Sam. I would like to thank the whole team at GTM for a wonderful job and the wonderful product I have. I have to recommend to anybody the customer support is awesome. If I ever had a question, they were there to answer it. A good product is nothing without customer support and this company has both!