GTM Performance Engineering 370Z SUPERCHARGER KIT PRESS RELEASE

NYBladeZ · 03-13-2010, 03:31 PM

CBE+LTH+GTM supercharger tuned=500whp and that gentlemen is fkin awesome!

Phimosis · 03-13-2010, 03:49 PM

Quote:

Originally Posted by LiquidZ

CARB people

Don't need a CARB expemtion order for cat-back-exhaust. You do need them for hi flow cats and headers though.

Another side note: CBE exhaust are only good for about 5hp based on dozens of before and after dyno results. An yeah, I get that a SC engine will flow more exhaust and be more restrictive, but it's going to be how much, 7hp difference?

Another side note: There's no way to know which kit is making more power without running them back to back on the same dyno. I have seen as much as 40hp difference in readings on my own car based on temp, alt and dyno manufacturer differences. One of my dyno guys says you can tinker with the settings to get the dyno to read higher or lower as well.

Phimosis · 03-13-2010, 03:55 PM

Quote:

Originally Posted by Togo

Wow I didn't realize they did that with a CBE on. Personally the low end TQ on the Stillen wasn't that great, i thought. Looked nearly stock in the low RPMs.

Nearly stock torque #'s at low rpm is typical for centrifugal supercahrgers. The faster you spin them, the more boost they make. Positive displacement superchargers, on the other hand, reach maximum boost at roughly 1/3rd of maximum operating speed, meaning you have full boost at 2,500 engine rpm.

The torque curve that the GTM kit makes looks typical for a positive displacement supercharger and I'm amazed that they are getting that out of a centrifugal charger.

Togo · 03-13-2010, 04:01 PM

Quote:

Originally Posted by Phimosis

Nearly stock torque #'s at low rpm is typical for centrifugal supercahrgers. The faster you spin them, the more boost they make. Positive displacement superchargers, on the other hand, reach maximum boost at roughly 1/3rd of maximum operating speed, meaning you have full boost at 2,500 engine rpm.

The torque curve that the GTM kit makes looks typical for a positive displacement supercharger and I'm amazed that they are getting that out of a centrifugal charger.

Oh I'm aware of the TQ characteristics with a Centrifugal SC, but was just shocked to see such results from the GTM. Personally, I think the low end TQ would be more fun to have. I mean top end HP is great and all but when you are already at 400+ HP what's another 20 over some serious TQ 500-1000 RPM sooner in the powerband. Thats just my opinion though.

Togo · 03-13-2010, 04:02 PM

It's unfortunate though that the Dyno for the GTM and STILLEN do not start at the same RPMs. One starts at roughly 3k and the other at 3.5k.

If they both started at 3k that would make for a great comparison.

Edit- Comparison in positive gains not in overall peak number. Different dynos etc but they both did baselines so a overall gain can be determined.

Zsteve · 03-13-2010, 04:25 PM

Quote:

Originally Posted by Phimosis

Don't need a CARB expemtion order for cat-back-exhaust. You do need them for hi flow cats and headers though.

Another side note: CBE exhaust are only good for about 5hp based on dozens of before and after dyno results. An yeah, I get that a SC engine will flow more exhaust and be more restrictive, but it's going to be how much, 7hp difference?

Another side note: There's no way to know which kit is making more power without running them back to back on the same dyno. I have seen as much as 40hp difference in readings on my own car based on temp, alt and dyno manufacturer differences. One of my dyno guys says you can tinker with the settings to get the dyno to read higher or lower as well.

A CBE is more like 15 hp on a stock engine, atleast thats what FIs and Berks and allo them dynos show. HFCs installed after a CBE is about 5 hp.

agree about the dyno, Ive been trying to get an answer on what dyno GTM used.

LiquidZ · 03-13-2010, 04:38 PM

The torque curve of the GTM kit is great. I want to know how the torque curve changes, if at all, with the other stages.

Chris@FsP · 03-13-2010, 04:44 PM

GTM uses a dynojet, I believe.

This isn't directed to anyone in particular, but these dyno comparisons are getting silly. There are simply too many variables involved when comparing dyno numbers. Correction factors, boost pressure, ambient temps, baro pressures are just a few of the factors involved. Not to mention, the two kits have entirely different tunes and are on entirely different sides of the country. To accurately compare the two, they need to be installed on bone stock cars, same types of transmission, same dyno, same conditions.

G Fo12ce · 03-13-2010, 04:58 PM

Agree for the most part, except both companies are in Southern CA.

Buddy Revell · 03-13-2010, 04:59 PM

Quote:

Originally Posted by G Fo12ce

Agree for the most part, except both companies are in Southern CA.

Yup. I live like 5 min. away from Stillen.

G Fo12ce · 03-13-2010, 05:05 PM

Quote:

Originally Posted by Buddy Revell

Yup. I live like 5 min. away from Stillen.

I'm about 15

Chris@FsP · 03-13-2010, 05:44 PM

Quote:

Originally Posted by G Fo12ce

Agree for the most part, except both companies are in Southern CA.

Gosh dangit, for some reason I had AAM's location in my mind, on the East coast. I'll take my licks for that one

CGMobile370Z · 03-13-2010, 06:18 PM

I have seen the question asked atleast six times and still have not seen an answer yet, or may be I just read over it. I will ask it again: How long will the introductory price last? What will the price be for the stage 1 kit after the introductory price ends? Thanks

SAM@GTM · 03-13-2010, 06:35 PM

Quote:

Originally Posted by CGMobile370Z

I have seen the question asked atleast six times and still have not seen an answer yet, or may be I just read over it. I will ask it again: How long will the introductory price last? What will the price be for the stage 1 kit after the introductory price ends? Thanks

Sorry about that. and the answer is to to the end of the month .

Sam

SAM@GTM · 03-13-2010, 06:39 PM

Quote:

Originally Posted by Zsteve

So where is GTM? They have a few questions they need to answer.

Just need to finish few things on the dyno and will be here to answer them all, including your other thread.

Sam

03-13-2010, 03:31 PM	#286 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 20	CBE+LTH+GTM supercharger tuned=500whp and that gentlemen is fkin awesome! __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

03-13-2010, 04:02 PM	#290 (permalink)
Togo A True Z Fanatic Join Date: May 2009 Location: E. Northport, NY Posts: 7,597 Drives: Stuff Rep Power: 657	It's unfortunate though that the Dyno for the GTM and STILLEN do not start at the same RPMs. One starts at roughly 3k and the other at 3.5k. If they both started at 3k that would make for a great comparison. Edit- Comparison in positive gains not in overall peak number. Different dynos etc but they both did baselines so a overall gain can be determined. __________________ This will decimate all after you put about fifteen grand in it or more, and if we have to, overnight parts from Japan. Joe Clem and Koeppel Nissan

03-13-2010, 04:38 PM	#292 (permalink)
LiquidZ A True Z Fanatic Join Date: Nov 2008 Location: Columbus, OH Posts: 1,940 Drives: Mag. Black 2009 370Z Rep Power: 705	The torque curve of the GTM kit is great. I want to know how the torque curve changes, if at all, with the other stages. __________________ Last edited by LiquidZ; 03-13-2010 at 04:41 PM.

03-13-2010, 04:58 PM	#294 (permalink)
G Fo12ce Premium Member Join Date: Nov 2009 Location: Socal Posts: 996 Drives: Sold! Rep Power: 52	Agree for the most part, except both companies are in Southern CA. __________________ Nismo Suspension: New Owners Check Here!

03-13-2010, 06:18 PM	#298 (permalink)
CGMobile370Z Base Member Join Date: Sep 2009 Location: Miami, FL Posts: 144 Drives: 2009 Nissan 370Z Rep Power: 16	What will the price be for the stage 1 kit after the introductory price ends? I have seen the question asked atleast six times and still have not seen an answer yet, or may be I just read over it. I will ask it again: How long will the introductory price last? What will the price be for the stage 1 kit after the introductory price ends? Thanks __________________ 370Z Touring/ Sports Package/ Stillen Gen3 Intake/ Stillen HFC/ NST Underdive Overdrive Pulleys/ FI Cat Back Exhaust/ Custom Headlights

03-13-2010, 04:44 PM	#293 (permalink)
Chris@FsP Enthusiast Member Join Date: Dec 2009 Location: Tulsa, OK Posts: 430 Drives: 2008 350Z TT Rep Power: 368	GTM uses a dynojet, I believe. This isn't directed to anyone in particular, but these dyno comparisons are getting silly. There are simply too many variables involved when comparing dyno numbers. Correction factors, boost pressure, ambient temps, baro pressures are just a few of the factors involved. Not to mention, the two kits have entirely different tunes and are on entirely different sides of the country. To accurately compare the two, they need to be installed on bone stock cars, same types of transmission, same dyno, same conditions.

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