GMMG dyno results within..
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From: Anaheim Hills, CA
GMMG dyno results within.. Well ive had the system for a year and I love the sound. BUT ive always been worried that the system is restrictive due to the curves..
Well last week I had a 3" cutout put in the intermediate pipe. The theory is that most people get 4rwhp from uncapping their cutout on the dyno.. If I were to uncap and get more than 4hp then the GMMG is more restrictive than most.. if I uncap and get less than 4hp then its less restrictive..
Run capped = 330.6rwhp & 337.8rwtq
Run uncapped = 333.7rwhp & 339.7rwtq
So thats only a gain of 3rwhp and 2rwtq from bypassing the GMMG.. needless to say im VERY happy with that.. These numbers are all corrected and were done on a recently calibrated Dynojet.. <img src="gr_stretch.gif" border="0">
Funny thing is that the car isnt much louder with the cutout open.. lol
Well last week I had a 3" cutout put in the intermediate pipe. The theory is that most people get 4rwhp from uncapping their cutout on the dyno.. If I were to uncap and get more than 4hp then the GMMG is more restrictive than most.. if I uncap and get less than 4hp then its less restrictive..
Run capped = 330.6rwhp & 337.8rwtq
Run uncapped = 333.7rwhp & 339.7rwtq
So thats only a gain of 3rwhp and 2rwtq from bypassing the GMMG.. needless to say im VERY happy with that.. These numbers are all corrected and were done on a recently calibrated Dynojet.. <img src="gr_stretch.gif" border="0">
Funny thing is that the car isnt much louder with the cutout open.. lol
Launching!
Joined: Nov 2001
Posts: 238
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From: Milwaukee Area, WI
Re: GMMG dyno results within.. Excellent info! <img src="gr_grin.gif" border="0"> Been waiting for true dyno #s for a while. Nice to see actual numbers.
Hopefully the exhaust can keep flowing well when around 400rwhp.
Thanks again.
[ February 17, 2002: Message edited by: Brownie ]</p>
Hopefully the exhaust can keep flowing well when around 400rwhp.
Thanks again.
[ February 17, 2002: Message edited by: Brownie ]</p>
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Joined: Nov 2001
Posts: 554
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From: Ontario Calif.
Re: GMMG dyno results within.. I did the same test on my GMMG as Steve did. I was 2 cars ahead of him dynoing.
Capped=312.2rwhp 333.0 rwtq
Uncapped=316.3rqhp 338.4rwtq
For me a difference of 4rwhp and almost 5.5rwtq.
Capped=312.2rwhp 333.0 rwtq
Uncapped=316.3rqhp 338.4rwtq
For me a difference of 4rwhp and almost 5.5rwtq.
Launching!
Joined: Nov 2001
Posts: 238
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From: Milwaukee Area, WI
Re: GMMG dyno results within.. [quote]Originally posted by JS:
<strong>Thats great info but try this on a car with 400+ RWHP and see what kind of loss u see?
JS</strong><hr></blockquote>
Have you seen anyone do this? I would love to know the answer to this.
Thanks,
Mike
<strong>Thats great info but try this on a car with 400+ RWHP and see what kind of loss u see?
JS</strong><hr></blockquote>
Have you seen anyone do this? I would love to know the answer to this.
Thanks,
Mike
