GTM Performance Engineering 370Z SUPERCHARGER KIT PRESS RELEASE

LiquidZ · 03-13-2010, 11:49 AM

Quote:

Originally Posted by Mike

and really, have you ever heard of anyone who went forced induction and kept the stock exhaust?

CARB people

Zsteve · 03-13-2010, 02:10 PM

Quote:

Originally Posted by LiquidZ

CARB people

which is why GTM did thiers that way, now we need a new dyno with CBE

Phimosis · 03-13-2010, 02:49 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.

Zsteve · 03-13-2010, 03:25 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.

MMC Racing · 03-13-2010, 10:30 AM

I can't believe people are going back and forth over maybe a 5% difference in numbers. The same person didn't tune these cars and that right there can be the difference. GTM may tune more aggressively based on their experience while Stillen may be more conservative. The kits are so darn close, it is like the margin for error in polling.

Buddy Revell · 03-13-2010, 11:07 AM

Quote:

Originally Posted by MMC Racing

I can't believe people are going back and forth over maybe a 5% difference in numbers. The same person didn't tune these cars and that right there can be the difference. GTM may tune more aggressively based on their experience while Stillen may be more conservative. The kits are so darn close, it is like the margin for error in polling.

Agreed. The power differences look pretty close to me, and will be even more similar once GTM dynos with an aftermarket cat-back.

Brazilbro · 03-13-2010, 10:36 AM

there are only 2 big differences in theses 2 kits that i can see..
1. One is 800 bucks more
2. Other wants full deposit
---------------------------
I like the looks and price of the GTM just dont like being without my 5gs untill whereever the kit shows up.. but I'm going to to pay it anyway.

NYBladeZ · 03-13-2010, 02:31 PM

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

Togo · 03-13-2010, 03:02 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.

LiquidZ · 03-13-2010, 03:38 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, 03:44 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, 03:58 PM

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

Buddy Revell · 03-13-2010, 03:59 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, 04:05 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, 04:44 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

03-13-2010, 10:36 AM	#7 (permalink)
Brazilbro A True Z Fanatic Join Date: Mar 2009 Location: Indianapolis, IN Posts: 1,131 Drives: Juke/240Z Rep Power: 849	there are only 2 big differences in theses 2 kits that i can see.. 1. One is 800 bucks more 2. Other wants full deposit --------------------------- I like the looks and price of the GTM just dont like being without my 5gs untill whereever the kit shows up.. but I'm going to to pay it anyway. __________________ Juke AWD/240Z SR20 08 Evo 10(Stage 2) SOLD Fastest Sport 6spd 370Z 11.8 @126.5SOLD

03-13-2010, 02:31 PM	#8 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 21	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, 03:02 PM	#9 (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, 03:38 PM	#10 (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 03:41 PM.

03-13-2010, 03:58 PM	#12 (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, 10:30 AM	#5 (permalink)
MMC Racing Track Member Join Date: Jun 2009 Location: San Diego Posts: 661 Drives: 2015 GT-R Rep Power: 17	I can't believe people are going back and forth over maybe a 5% difference in numbers. The same person didn't tune these cars and that right there can be the difference. GTM may tune more aggressively based on their experience while Stillen may be more conservative. The kits are so darn close, it is like the margin for error in polling.

03-13-2010, 03:44 PM	#11 (permalink)
Chris@FsP Enthusiast Member Join Date: Dec 2009 Location: Tulsa, OK Posts: 430 Drives: 2008 350Z TT Rep Power: 369	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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