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My GTM Supercharger Review

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

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Old 12-24-2010, 01:47 PM   #16 (permalink)
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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.
Did you remove the cats for performance purposes?
I am starting to save for the stage II kit and I love the way my car sounds with HFC's. I'd hate to lose them but if the supercharger kits perform better with the stock cats then I'd just have to deal.
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Old 12-24-2010, 02:10 PM   #17 (permalink)
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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
No it is the same pulley as before, The car was making 8 psi on the dyno and it made little a little more on the road. also the boost did not change wither we had test pipes or factory cats. although i did tighten the bypass valve as much as possible to give the car a better boost response and maybe that 's what did it .

And yes you are correct the beauty about this set up is that you don't have to red line the car to get all the performance out of it.

Sam
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Old 12-24-2010, 02:15 PM   #18 (permalink)
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How much boost are you running? What was the base line before the SC?
Will post the dyno graph's shortly .

Sam
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Old 12-24-2010, 02:19 PM   #19 (permalink)
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Originally Posted by Dembflyr View Post
Did you remove the cats for performance purposes?
I am starting to save for the stage II kit and I love the way my car sounds with HFC's. I'd hate to lose them but if the supercharger kits perform better with the stock cats then I'd just have to deal.
I'm posting a supercharged 370Z Nismo shortly with HFC that made 420 rwhp and 350 rwtq on 91 octane . So the system is working well with both setups, The only problem with after market HFC is that they wont survive an FI system for more the six month .

Sam

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Old 12-24-2010, 02:35 PM   #20 (permalink)
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Sam did you get my email about the sedan SC kit?
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Old 12-24-2010, 03:18 PM   #21 (permalink)
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Originally Posted by SAM@GTM View Post
I posting a supercharged 370Z Nismo shortly with HFC that made 420 rwhp and 350 rwtq on 91 octane . So the system is working well with both setups, The only problem with after market HFC is that they wont survive an FI system for more the six month .

Sam
I see. So test pipes it is then.

I saw that video of the SC Nismo. That sounds SICK!! I love it.
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Old 12-24-2010, 03:39 PM   #22 (permalink)
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Nice work Sam ...... me likey
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Old 12-24-2010, 04:21 PM   #23 (permalink)
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No it is the same pulley as before, The car was making 8 psi on the dyno and it made little a little more on the road. also the boost did not change wither we had test pipes or factory cats. although i did tighten the bypass valve as much as possible to give the car a better boost response and maybe that 's what did it .

And yes you are correct the beauty about this set up is that you don't have to red line the car to get all the performance out of it.

Sam
Nice!

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Old 12-24-2010, 04:57 PM   #24 (permalink)
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Originally Posted by SAM@GTM View Post
I'm posting a supercharged 370Z Nismo shortly with HFC that made 420 rwhp and 350 rwtq on 91 octane . So the system is working well with both setups, The only problem with after market HFC is that they wont survive an FI system for more the six month .

Sam
Poor Cats
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Old 12-24-2010, 09:30 PM   #25 (permalink)
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Merry Christmas to everyone and longlive to GTM!
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Old 12-24-2010, 10:24 PM   #26 (permalink)
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You must love your car that much more , OP. Nicely done Sam! Thanks for posting the videos. How long did the install and tuning take?
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Old 12-24-2010, 11:09 PM   #27 (permalink)
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Quote:
Originally Posted by SAM@GTM View Post
I'm posting a supercharged 370Z Nismo shortly with HFC that made 420 rwhp and 350 rwtq on 91 octane . So the system is working well with both setups, The only problem with after market HFC is that they wont survive an FI system for more the six month .

Sam
Sam what are your thoughts on resonated test pipes? Will they eventually blow out the packaging because of the increased hot exhaust gasses? I've had mine on my car for about a year now without any issues with exhaust mods.
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Old 12-26-2010, 02:33 PM   #28 (permalink)
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Quote:
Originally Posted by Dembflyr View Post
Did you remove the cats for performance purposes?
I am starting to save for the stage II kit and I love the way my car sounds with HFC's. I'd hate to lose them but if the supercharger kits perform better with the stock cats then I'd just have to deal.
I removed the HFCs for money and sound reasons. Wanted some extra cash and I wanted to quiet down my car. I used to have a full Fast Intentions setup: HFCs and cat-back exhaust. But I sold all those pieces to go with the more conservative y-pipe back GReddy exhaust. I may go back to a full catback sometime in the future, but I'd want to look for the quietest catback exhaust I could find. Also, Sam said that HFCs wouldn't last too long w/ forced induction.
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Old 12-26-2010, 05:37 PM   #29 (permalink)
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Just curious why would aftermarket HFC's not last long when going FI? I have a set of Fast Intention HFC's, and I would sure hate to get rid of them because of boost.
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Old 12-26-2010, 07:46 PM   #30 (permalink)
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Just curious why would aftermarket HFC's not last long when going FI? I have a set of Fast Intention HFC's, and I would sure hate to get rid of them because of boost.
Because HFC were never intended for FI use, not strong enough to take the heat of the EGT on an FI car. On average it will take 3 to 5 months before they melt down .

Sam
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