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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

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Old 12-23-2010, 08:36 PM   #1 (permalink)
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Default 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.
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Old 12-23-2010, 09:26 PM   #2 (permalink)
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Congrats and nice write up!

You should post some pictures when you get a chance.

DAN
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Old 12-23-2010, 11:13 PM   #3 (permalink)
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Congrats good review great right up
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Old 12-24-2010, 12:49 AM   #4 (permalink)
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Good review, how about a pic of under the hood and the total car so we can all envy you just a little haha.
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Old 12-24-2010, 02:38 AM   #5 (permalink)
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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.



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Old 12-24-2010, 06:31 AM   #6 (permalink)
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Thanks for the pictures, Looks great!



DAN
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Old 12-24-2010, 08:55 AM   #7 (permalink)
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Thanks for the review!

car looks good. I just saw the two videos Sam posted on YT.
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Old 12-24-2010, 09:15 AM   #8 (permalink)
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Old 12-24-2010, 09:34 AM   #9 (permalink)
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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.
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Old 12-24-2010, 09:37 AM   #10 (permalink)
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Quote:
Originally Posted by Dembflyr View Post
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
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Old 12-24-2010, 09:40 AM   #11 (permalink)
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Quote:
Originally Posted by Buddy Revell View Post
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
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Old 12-24-2010, 10:08 AM   #12 (permalink)
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I can't watch the video! Damn phone video stream sucks!
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Old 12-24-2010, 10:42 AM   #13 (permalink)
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How much boost are you running? What was the base line before the SC?
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Old 12-24-2010, 12:24 PM   #14 (permalink)
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Quote:
Originally Posted by Z eliminator View Post
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.
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Old 12-24-2010, 12:45 PM   #15 (permalink)
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Quote:
Originally Posted by Buddy Revell View Post
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
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