Nissan 370Z Forum  

GTM 370z supercharger 550bhp/400 ft of Torque: The Masterpiece

Firstly let me just say that from what I have seen on here for the past 18 months, I'm a big fan of GTM. Just 2 questions out of curiosity

Go Back   Nissan 370Z Forum > Nissan 370Z Tech Area > Engine & Drivetrain > Forced Induction


Reply
 
LinkBack Thread Tools Display Modes
Old 03-07-2011, 02:28 PM   #1 (permalink)
Base Member
 
GUTCH's Avatar
 
Join Date: Jun 2010
Location: Australia
Posts: 134
Drives: 2018 Audi TT RS
Rep Power: 15
GUTCH is on a distinguished road
Default GTM 370z supercharger 550bhp/400 ft of Torque: The Masterpiece

Firstly let me just say that from what I have seen on here for the past 18 months, I'm a big fan of GTM.

Just 2 questions out of curiosity in relation to the car in these videos.

1. Why was there no build thread for this car?
2. Why have these figures not been repeated on other stage 1 builds?

YouTube - GTM 370Z SUPERCHARGER 550BHP/400 FT OF TORQUE 460 RWHP 360 RWTQ.THE MASTERPIECE

YouTube - GTM 370Z SUPERCHARGER STG1 8PSI 550BHP/400 FT OF TORQUE 460 RWHP 360 RWTQ. TEST DRIVE
GUTCH is offline   Reply With Quote
Old 03-07-2011, 02:59 PM   #2 (permalink)
Not an active Vendor. DO NOT BUY
 
Join Date: Sep 2009
Location: California
Posts: 391
Drives: '13 Hot Lava FR-S
Rep Power: 17
Mike@GTM is a splendid one to beholdMike@GTM is a splendid one to beholdMike@GTM is a splendid one to beholdMike@GTM is a splendid one to beholdMike@GTM is a splendid one to beholdMike@GTM is a splendid one to beholdMike@GTM is a splendid one to beholdMike@GTM is a splendid one to behold
Default

I would be happy to address your questions.

1) There is in fact a build thread for that exact car: GTM Performance Engineering 370Z SUPERCHARGER KIT PRESS RELEASE

2) This was part of the R&D process. Those numbers were made with a one-off race intake, GTM 2.5" cat-back exhaust and STOCK CATS. It is also an extremely aggressive tune on 93 octane gas. Mainly this was to demonstrate the supercharger's capability. Our off the shelf tune is conservative to ensure that everyone that buys and installs it will be able to achieve the advertised 500bhp (or very close to it depending on many variables) without undue risk to their engines.

The other main reason why we are showing such a graph is because we were able to achieve those numbers with this supercharger unit. Also, this is a strong validation that the supercharger unit is capable of more power with a better tuned VVEL tuning solution.

Here is the same supercharger unit making 490whp on a 350Z (VQ35HR with tuned dual CVVT) with 100 octane gas:


This shows very clearly how VVEL adversely affects power output with a supercharger. I cannot overstate that enough.

Again, we were able to make 460whp on the 370Z with STOCK CATS. The reason for that is because, quite simply, the back pressure generated by the stock cats keeps air from blowing through the engine. This means more air stays in the cylinder to be combusted. Once we are able to tune VVEL, we will be able to reduce the overlap and thus make more power on supercharged cars.
Mike@GTM is offline   Reply With Quote
Old 03-07-2011, 03:22 PM   #3 (permalink)
Base Member
 
GUTCH's Avatar
 
Join Date: Jun 2010
Location: Australia
Posts: 134
Drives: 2018 Audi TT RS
Rep Power: 15
GUTCH is on a distinguished road
Default

Thanks for the quick and detailed answer, much appreciated.

GUTCH is offline   Reply With Quote
Old 03-07-2011, 04:08 PM   #4 (permalink)
Base Member
 
Join Date: Apr 2010
Location: at Shop
Posts: 19
Drives: 2010 370Z
Rep Power: 15
EXTREME is on a distinguished road
Default

i need one
is there a kit ready for shipping
__________________
something is cookin
EXTREME is offline   Reply With Quote
Old 03-07-2011, 06:49 PM   #5 (permalink)
A True Z Fanatic
 
Jordo!'s Avatar
 
Join Date: May 2010
Location: nirvana
Posts: 6,394
Drives: 2023 NATM
Rep Power: 418
Jordo! has a reputation beyond reputeJordo! has a reputation beyond reputeJordo! has a reputation beyond reputeJordo! has a reputation beyond reputeJordo! has a reputation beyond reputeJordo! has a reputation beyond reputeJordo! has a reputation beyond reputeJordo! has a reputation beyond reputeJordo! has a reputation beyond reputeJordo! has a reputation beyond reputeJordo! has a reputation beyond repute
Default

Quote:
Originally Posted by Mike@GTM View Post
Once we are able to tune VVEL, we will be able to reduce the overlap and thus make more power on supercharged cars.
And probably NA too.

How is the progress coming on this project? Any updates?
__________________
Enjoy it. Destroy it.
Jordo! is offline   Reply With Quote
Old 03-13-2011, 04:00 PM   #6 (permalink)
NOT AN ACTIVE SPONSOR. DO NOT BUY
 
Join Date: Dec 2008
Location: CALIFORNIA
Posts: 913
Drives: 370Z
Rep Power: 17
SAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to behold
Default

Quote:
Originally Posted by Jordo! View Post
And probably NA too.

How is the progress coming on this project? Any updates?
We are making great progress so far, Also we are applying everything we have learned from stage 1 to the stage 2 so we can utilize all the 91 potential. The 91 supercharger has been on and off the car hundred times do far. It is a very time consuming process ...

Sam
SAM@GTM is offline   Reply With Quote
Old 03-13-2011, 04:19 PM   #7 (permalink)
Track Member
 
Dembflyr's Avatar
 
Join Date: Feb 2010
Location: Indiana
Posts: 886
Drives: G37S Sedan
Rep Power: 16
Dembflyr is a name known to allDembflyr is a name known to allDembflyr is a name known to allDembflyr is a name known to allDembflyr is a name known to allDembflyr is a name known to all
Default

Any estimate on a release date for stage II?

I've got the money just burning a hole in my pocket!!
__________________
2012 G37S Sedan 6MT - Project Practicality

2009-6MT-Sport/Touring-Dembflyr's Journal-TT Build Thread-CAR IS SOLD
Dembflyr is offline   Reply With Quote
Old 03-13-2011, 04:43 PM   #8 (permalink)
NOT AN ACTIVE SPONSOR. DO NOT BUY
 
Join Date: Dec 2008
Location: CALIFORNIA
Posts: 913
Drives: 370Z
Rep Power: 17
SAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to behold
Default

Quote:
Originally Posted by Dembflyr View Post
Any estimate on a release date for stage II?

I've got the money just burning a hole in my pocket!!
We should be done by the end of this month, FYI we could have been done much sooner if we stuck to just fitting the bigger charger instead we are focusing on maximizing the potential of the 91 with this engine .

Sam
SAM@GTM is offline   Reply With Quote
Old 03-13-2011, 04:52 PM   #9 (permalink)
Track Member
 
Dembflyr's Avatar
 
Join Date: Feb 2010
Location: Indiana
Posts: 886
Drives: G37S Sedan
Rep Power: 16
Dembflyr is a name known to allDembflyr is a name known to allDembflyr is a name known to allDembflyr is a name known to allDembflyr is a name known to allDembflyr is a name known to all
Default

Quote:
Originally Posted by SAM@GTM View Post
We should be done by the end of this month, FYI we could have been done much sooner if we stuck to just fitting the bigger charger instead we are focusing on maximizing the potential of the 91 with this engine .

Sam
Thanks for the update. If I recall correctly that's about when you said it would be done when I spoke to you a few weeks ago.
I have no doubt that you are going to make sure it is the best it can be.
I wouldn't want it any other way.

Once it is released, how long will it take to ship from when the order is placed?
__________________
2012 G37S Sedan 6MT - Project Practicality

2009-6MT-Sport/Touring-Dembflyr's Journal-TT Build Thread-CAR IS SOLD
Dembflyr is offline   Reply With Quote
Old 03-13-2011, 05:24 PM   #10 (permalink)
NOT AN ACTIVE SPONSOR. DO NOT BUY
 
Join Date: Dec 2008
Location: CALIFORNIA
Posts: 913
Drives: 370Z
Rep Power: 17
SAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to beholdSAM@GTM is a splendid one to behold
Default

Quote:
Originally Posted by Dembflyr View Post
Thanks for the update. If I recall correctly that's about when you said it would be done when I spoke to you a few weeks ago.
I have no doubt that you are going to make sure it is the best it can be.
I wouldn't want it any other way.

Once it is released, how long will it take to ship from when the order is placed?
We are hoping right away, We already have a good size list of people that have prepaid and have been waiting for a while for the stage 2, so those order will be shipped out first.

Sam

Last edited by SAM@GTM; 03-14-2011 at 01:21 AM.
SAM@GTM is offline   Reply With Quote
Old 03-13-2011, 07:26 PM   #11 (permalink)
A True Z Fanatic
 
Zat_Zuma's Avatar
 
Join Date: Nov 2008
Location: Edmonton, Alberta ...eh
Posts: 1,171
Drives: 2017 Touring auto
Rep Power: 19
Zat_Zuma is a glorious beacon of lightZat_Zuma is a glorious beacon of lightZat_Zuma is a glorious beacon of lightZat_Zuma is a glorious beacon of lightZat_Zuma is a glorious beacon of light
Default

__________________
[B]2009 & 2017 370Z Touring Sport Autos SOLD
Zat_Zuma is offline   Reply With Quote
Old 03-13-2011, 11:35 PM   #12 (permalink)
A True Z Fanatic
 
NewYorkJon34's Avatar
 
Join Date: Jun 2009
Location: Naples, Florida
Posts: 3,041
Drives: 09 Fairlady Z
Rep Power: 1065
NewYorkJon34 has a reputation beyond reputeNewYorkJon34 has a reputation beyond reputeNewYorkJon34 has a reputation beyond reputeNewYorkJon34 has a reputation beyond reputeNewYorkJon34 has a reputation beyond reputeNewYorkJon34 has a reputation beyond reputeNewYorkJon34 has a reputation beyond reputeNewYorkJon34 has a reputation beyond reputeNewYorkJon34 has a reputation beyond reputeNewYorkJon34 has a reputation beyond reputeNewYorkJon34 has a reputation beyond repute
Default

Reading this thread makes me want that Stg.2 even more than I already did
NewYorkJon34 is offline   Reply With Quote
Old 03-14-2011, 09:15 AM   #13 (permalink)
A True Z Fanatic
 
Z eliminator's Avatar
 
Join Date: Jul 2009
Location: Ontario Canada
Posts: 1,659
Drives: 370 Z 7AT Sports
Rep Power: 19
Z eliminator will become famous soon enough
Default

Waiting for the stage 2. " by the end of the month ?" Thats the best news i have heard yet. Can not wait to take it down the 1/4 mile.
__________________
12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015.
Z eliminator is offline   Reply With Quote
Old 03-14-2011, 09:06 PM   #14 (permalink)
BLM
Enthusiast Member
 
BLM's Avatar
 
Join Date: Feb 2011
Location: NJ
Posts: 342
Drives: 2011 Silver M6 sport
Rep Power: 14
BLM will become famous soon enough
Default

Can someone with engineering knowledge give a layman's explanation of how the VVEL hinders the power output and how "tuning" it will benefit both NA and SC cars? I have a vague understanding of it but I know VVEL tuning and "cracking" the ecu has been a hot topic
__________________
K&N // GTM // BERK
BLM is offline   Reply With Quote
Old 03-15-2011, 01:26 AM   #15 (permalink)
Track Member
 
Staples's Avatar
 
Join Date: Sep 2010
Location: Baltimore, MD
Posts: 546
Drives: '08 Infiniti G37s
Rep Power: 16
Staples is on a distinguished road
Default

Quote:
Originally Posted by BLM View Post
Can someone with engineering knowledge give a layman's explanation of how the VVEL hinders the power output and how "tuning" it will benefit both NA and SC cars? I have a vague understanding of it but I know VVEL tuning and "cracking" the ecu has been a hot topic
I've posted an explanation on another thread, can't find it... here's a brief copied and pasted explanation.

The VVEL system in our cars and extremely aggressive at about a 300 cam duration;

Valve Overlap

"The portion of the operating cycle of a reciprocating engine in which, when the piston is passing TDC (top dead center) on the exhaust stroke, both the intake and exhaust valves are open. Valve overlap increases the efficiency of the engine operation by allowing the low pressure caused by the exhaust gases leaving the cylinder to help the fresh charge of fuel-air mixture in the induction system to start moving into the engine."

When you're pushing so much air into a car (forced induction) with an aggressive cam - there's air that isn't going to be used and is just going to pushed out of the motor and wasted because both the intake / exhaust valves are open at the same-time. Drop the cam duration, you'll have more time between the valve overlap process so when the air enters the head it will give the bottom end enough time to use that air for the combustion process, building more psi, creating more power.

Let me know if there's anything I'm incorrect about, but that's what I've gathered.
__________________
'08 Infiniti G37s - Forced Induction Fed
Staples is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Which exhaust give highest Hp-torque for 370z OhYeah Intake/Exhaust 28 01-07-2015 06:48 PM
DDMotorsports Shop 370Z Baseline Dyno - UGLY Torque Curve M.Bonanni Nissan 370Z General Discussions 31 01-10-2011 09:58 AM
GTM TWIN TURBO kit: 2009 370Z 539WHP/490RWTQ-WATER INJECTED TORQUE MONSTER SAM@GTM Forced Induction 14 09-01-2010 04:21 PM
my 370z vs. 350z Supercharger S3 Snakes709 Track / Autocross / Drifting / Dragstrip 16 09-20-2009 04:53 AM
Jon Sibal masterpiece for 370ZTune 370Ztune 370Ztune 0 02-09-2009 03:47 PM


All times are GMT -5. The time now is 02:27 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2