My GTM Supercharger Review

Buddy Revell · 12-23-2010, 09:36 PM

After having GTM's SC kit on my G37 6MT for over 4,000 mi, I just wanted to give my 2 cents about it. In short, it's everything I wanted in a supercharger system for my Infiniti. Significant power throughout the rev-range, factory-smooth driveability, great price, clean looks, refined sound, everything: I give this kit two thumbs up.

Now, I will say that I can only give it a 99 out of 100 and not a perfect score because I'm not putting up as much peak power as others with this kit (about 400 to the wheels on 91 octane but a great 340 ft-lbs. of torque). However, my main goal with my G wasn't peak hp. I was more interested in torque and useable power, something that I was totally unsatisfied with when I only had bolt-on mods. A peak hp increase that's only available at 6-7k rpms wasn't cutting it. I wanted to have as much low-end and mid-range grunt as possible (which makes the biggest difference for my daily-driver) but also have enough top-end power to spank M3s and IS-Fs when I feel like it. I have all of that and then some.

Since I was an early adopter, I did have to deal with the flutter and boost taper issues. I waited to post a review until I got those solved and until I could get a better feel about how the SC kit performed day in and day out. Idle in all temperatures has been rock solid. Power has improved greatly but is still smooth and linear throughout the rpm range. No detonation problems with the crappy Cali gas regardless of the weather. I don't have the dynos to post, but Sam has 'em if you guys wanna ask him about them.

The customer service I received from Sam and the guys at GTM has been absolutely top-notch as well. They did definitely take their time when working on my ride, but I'd rather have that than have them rush everything and not do the job right. Finally, I want to add that I'm no fanboy with a blind allegiance to any one brand over another. I live 5 min. from Stillen, have been to their headquarters many times, have bought parts from them for my past two cars, and will probably buy stuff from them in the future. However, when GTM released their SC kit, it was exactly what I was looking for. After finding out first-hand how it has performed for months now, I can honestly say that they have absolutely delivered.

One_Quick_Z · 12-23-2010, 10:26 PM

Congrats and nice write up!

You should post some pictures when you get a chance.

DAN

Mr.Squeeze · 12-24-2010, 12:13 AM

Congrats good review great right up

Chris_1 · 12-24-2010, 01:49 AM

Good review, how about a pic of under the hood and the total car so we can all envy you just a little haha.

Buddy Revell · 12-24-2010, 03:38 AM

I've always been lazy about taking pics of my car. Here are some pics Sam took a while back when the kit was first installed. I went with black piping and intercooler for a clean, subtle look.

One_Quick_Z · 12-24-2010, 07:31 AM

Thanks for the pictures, Looks great!

DAN

Q8y_drifter · 12-24-2010, 09:55 AM

Thanks for the review!

car looks good. I just saw the two videos Sam posted on YT.

SAM@GTM · 12-24-2010, 10:15 AM

Dembflyr · 12-24-2010, 10:34 AM

Sam, you are successfully feeding my need to BOOST!!

And reinforcing my choice to go with a GTM kit when I do.

I will be calling you sometime after the new year.

SAM@GTM · 12-24-2010, 10:37 AM

Quote:

Originally Posted by Dembflyr

Sam, you are successfully feeding my need to BOOST!!

And reinforcing my choice to go with a GTM kit when I do.

I will be calling you sometime after the new year.

Glad to hear that it is working on you

Sam

SAM@GTM · 12-24-2010, 10:40 AM

Quote:

Originally Posted by Buddy Revell

After having GTM's SC kit on my G37 6MT for over 4,000 mi, I just wanted to give my 2 cents about it. In short, it's everything I wanted in a supercharger system for my Infiniti. Significant power throughout the rev-range, factory-smooth driveability, great price, clean looks, refined sound, everything: I give this kit two thumbs up.

Now, I will say that I can only give it a 99 out of 100 and not a perfect score because I'm not putting up as much peak power as others with this kit (about 400 to the wheels on 91 octane but a great 340 ft-lbs. of torque). However, my main goal with my G wasn't peak hp. I was more interested in torque and useable power, something that I was totally unsatisfied with when I only had bolt-on mods. A peak hp increase that's only available at 6-7k rpms wasn't cutting it. I wanted to have as much low-end and mid-range grunt as possible (which makes the biggest difference for my daily-driver) but also have enough top-end power to spank M3s and IS-Fs when I feel like it. I have all of that and then some.

Since I was an early adopter, I did have to deal with the flutter and boost taper issues. I waited to post a review until I got those solved and until I could get a better feel about how the SC kit performed day in and day out. Idle in all temperatures has been rock solid. Power has improved greatly but is still smooth and linear throughout the rpm range. No detonation problems with the crappy Cali gas regardless of the weather. I don't have the dynos to post, but Sam has 'em if you guys wanna ask him about them.

The customer service I received from Sam and the guys at GTM has been absolutely top-notch as well. They did definitely take their time when working on my ride, but I'd rather have that than have them rush everything and not do the job right. Finally, I want to add that I'm no fanboy with a blind allegiance to any one brand over another. I live 5 min. from Stillen, have been to their headquarters many times, have bought parts from them for my past two cars, and will probably buy stuff from them in the future. However, when GTM released their SC kit, it was exactly what I was looking for. After finding out first-hand how it has performed for months now, I can honestly say that they have absolutely delivered.

Thank you Nick, We are glad that we have met your expectation.

beautiful ride

Sam

weiboy718 · 12-24-2010, 11:08 AM

I can't watch the video! Damn phone video stream sucks!

Z eliminator · 12-24-2010, 11:42 AM

How much boost are you running? What was the base line before the SC?

Buddy Revell · 12-24-2010, 01:24 PM

Quote:

Originally Posted by Z eliminator

How much boost are you running? What was the base line before the SC?

I'm running the normal pulley for about 8 lbs. of boost (I don't have a boost gauge to give you the exact number). It dynoed at around 278, but my baseline was w/ a few different mods (motordyne xyz pipe, HFCs) that I ended up taking off my car and selling.

weiboy718 · 12-24-2010, 01:45 PM

Quote:

Originally Posted by Buddy Revell

I'm running the normal pulley for about 8 lbs. of boost (I don't have a boost gauge to give you the exact number). It dynoed at around 278, but my baseline was w/ a few different mods (motordyne xyz pipe, HFCs) that I ended up taking off my car and selling.

I'm really curious cuz the video are showing close to 8psi of boost at about 6k-6.5k

I was thinking that maybe you have a smaller pulley. I like it that way better rather than always redlining just to reach 8psi of boost

12-23-2010, 09:36 PM	#1 (permalink)
Buddy Revell Enthusiast Member Join Date: Mar 2009 Location: So Cal Posts: 303 Drives: 08 Infiniti G37 Rep Power: 16	My GTM Supercharger Review After having GTM's SC kit on my G37 6MT for over 4,000 mi, I just wanted to give my 2 cents about it. In short, it's everything I wanted in a supercharger system for my Infiniti. Significant power throughout the rev-range, factory-smooth driveability, great price, clean looks, refined sound, everything: I give this kit two thumbs up. Now, I will say that I can only give it a 99 out of 100 and not a perfect score because I'm not putting up as much peak power as others with this kit (about 400 to the wheels on 91 octane but a great 340 ft-lbs. of torque). However, my main goal with my G wasn't peak hp. I was more interested in torque and useable power, something that I was totally unsatisfied with when I only had bolt-on mods. A peak hp increase that's only available at 6-7k rpms wasn't cutting it. I wanted to have as much low-end and mid-range grunt as possible (which makes the biggest difference for my daily-driver) but also have enough top-end power to spank M3s and IS-Fs when I feel like it. I have all of that and then some. Since I was an early adopter, I did have to deal with the flutter and boost taper issues. I waited to post a review until I got those solved and until I could get a better feel about how the SC kit performed day in and day out. Idle in all temperatures has been rock solid. Power has improved greatly but is still smooth and linear throughout the rpm range. No detonation problems with the crappy Cali gas regardless of the weather. I don't have the dynos to post, but Sam has 'em if you guys wanna ask him about them. The customer service I received from Sam and the guys at GTM has been absolutely top-notch as well. They did definitely take their time when working on my ride, but I'd rather have that than have them rush everything and not do the job right. Finally, I want to add that I'm no fanboy with a blind allegiance to any one brand over another. I live 5 min. from Stillen, have been to their headquarters many times, have bought parts from them for my past two cars, and will probably buy stuff from them in the future. However, when GTM released their SC kit, it was exactly what I was looking for. After finding out first-hand how it has performed for months now, I can honestly say that they have absolutely delivered. __________________ '08 IP G37S/GTM Supercharger/20" DPE SP-5 Wheels/ARK GRIP Exhaust

12-23-2010, 10:26 PM	#2 (permalink)
One_Quick_Z A True Z Fanatic Join Date: May 2009 Location: Seneca Il Posts: 1,374 Drives: 10 Civic EX Sedan Rep Power: 219	Congrats and nice write up! You should post some pictures when you get a chance. DAN __________________ -My BRZ with exhaust will decimate all if we overnight parts from Japan- 10 Civic EX Sedan- Current Daily

12-24-2010, 03:38 AM	#5 (permalink)
Buddy Revell Enthusiast Member Join Date: Mar 2009 Location: So Cal Posts: 303 Drives: 08 Infiniti G37 Rep Power: 16	I've always been lazy about taking pics of my car. Here are some pics Sam took a while back when the kit was first installed. I went with black piping and intercooler for a clean, subtle look. __________________ '08 IP G37S/GTM Supercharger/20" DPE SP-5 Wheels/ARK GRIP Exhaust

12-24-2010, 07:31 AM	#6 (permalink)
One_Quick_Z A True Z Fanatic Join Date: May 2009 Location: Seneca Il Posts: 1,374 Drives: 10 Civic EX Sedan Rep Power: 219	Thanks for the pictures, Looks great! DAN __________________ -My BRZ with exhaust will decimate all if we overnight parts from Japan- 10 Civic EX Sedan- Current Daily

12-24-2010, 09:55 AM	#7 (permalink)
Q8y_drifter Enthusiast Member Join Date: Mar 2010 Location: Kuwait Posts: 306 Drives: 08 Infiniti G35 5AT Rep Power: 15	Thanks for the review! car looks good. I just saw the two videos Sam posted on YT. __________________ 08 G35 5AT Sedan \| Stillen CBE \| Invidia HFC \| Injen CAI \| Uprev Tune \| Akebono BBK \| Tanabe Coilovers \| Hotchkis Sway Bars \| GTSpec FSB \| Black Headlights & Grille \| Volk GT-F Wheels \| Hankook V12 Evo Tires

12-24-2010, 12:13 AM	#3 (permalink)
Mr.Squeeze A True Z Fanatic Join Date: Aug 2010 Location: Keystone state Posts: 1,209 Drives: 2010 370z Rep Power: 20153	Congrats good review great right up

12-24-2010, 01:49 AM	#4 (permalink)
Chris_1 Track Member Join Date: Mar 2010 Location: Statewide Posts: 838 Drives: Nissan 370Z Roadster Rep Power: 16	Good review, how about a pic of under the hood and the total car so we can all envy you just a little haha.

12-24-2010, 10:15 AM	#8 (permalink)
SAM@GTM NOT AN ACTIVE SPONSOR. DO NOT BUY Join Date: Dec 2008 Location: CALIFORNIA Posts: 913 Drives: 370Z Rep Power: 18

12-24-2010, 10:34 AM	#9 (permalink)
Dembflyr Track Member Join Date: Feb 2010 Location: Indiana Posts: 886 Drives: G37S Sedan Rep Power: 16	Sam, you are successfully feeding my need to BOOST!! And reinforcing my choice to go with a GTM kit when I do. I will be calling you sometime after the new year. __________________ 2012 G37S Sedan 6MT - Project Practicality 2009-6MT-Sport/Touring-Dembflyr's Journal-TT Build Thread-CAR IS SOLD

12-24-2010, 11:08 AM	#12 (permalink)
weiboy718 Track Member Join Date: May 2010 Location: Bay Area Posts: 923 Drives: Infiniti G37 Rep Power: 16	I can't watch the video! Damn phone video stream sucks!

12-24-2010, 11:42 AM	#13 (permalink)
Z eliminator A True Z Fanatic Join Date: Jul 2009 Location: Ontario Canada Posts: 1,659 Drives: 370 Z 7AT Sports Rep Power: 19	How much boost are you running? What was the base line before the SC? __________________ 12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015.

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