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11-09-2009, 09:06 PM
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Hummer Expert
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Join Date: Feb 2008
Location: Portland, OR
Posts: 948
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Intake / Exhaust for better mileage
Will standard K&N intakes work as good as a cold air setup to improve gas mileage?
RE: the exhaust....
I will purchase one for the same reason, to help a tad with mileage (God I love it when I have good excuses to buy something!)
What is exhaust flows well but isn't that loud? I've come to really like the quieter cabin.
Will doing a cat back only help with the gas mileage?
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11-10-2009, 12:16 AM
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Hummer Expert
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Join Date: May 2007
Location: PHOENIX AZ
Posts: 681
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Re: Intake / Exhaust for better mileage
This has been covered many times ,the stock setup works just fine. if you want to see for yourself . dyno your stock setup and then buy the K&N and cat back . dyno that ,and compair the 2 . you may find 1 or 2 HP above 3500 rpm ,but that's it . do you drive in that rpm range ? as far as mpg ,at 1800 to 2200 there is no differance.
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11-10-2009, 02:44 AM
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Hummer Expert
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Join Date: Feb 2008
Location: Portland, OR
Posts: 948
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Re: Intake / Exhaust for better mileage
Quote:
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Originally Posted by IRA51
This has been covered many times ,the stock setup works just fine. if you want to see for yourself . dyno your stock setup and then buy the K&N and cat back . dyno that ,and compair the 2 . you may find 1 or 2 HP above 3500 rpm ,but that's it . do you drive in that rpm range ? as far as mpg ,at 1800 to 2200 there is no differance.
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Thanks for the reply....much appreciated! |
11-11-2009, 05:08 AM
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Hummer Authority
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Join Date: Nov 2004
Location: Little Rock, Arkansas
Posts: 1,784
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Re: Intake / Exhaust for better mileage
IRA is correct, go with his advice. You would gain some torque with catback but, not great. You would need long tube headers to go with them to get most out of both.
TAZ
__________________
05 H2 SUV cus. paint, Magnuson SC 6/12lb boost, cowl hood scoop, 12" dash touchscreen, GM elec. fans, HPTuners.com tuning soft., Dynatech headers dual catback exhaust Jet Hot chrome front to back Flowmaster Super 40's, Diamo 8 Karat rims & 325X60-20" Toyo, 4 OEM Captain seats Katzkins leather, rear console computer inside running all AV/NAV etc., Infinity component system 3 amps Tsunami Caps, rear flip down 12" monitor, headrest monitors, overhead console boost, fuel pressure, & A/F ratio gauges
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11-11-2009, 05:16 AM
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Hummer Expert
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Join Date: Feb 2008
Location: Portland, OR
Posts: 948
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Re: Intake / Exhaust for better mileage
Thanks TAZ!
I did go with his advice... I didn't order either one, cold air OR exhaust.
For now I'm just going to get used to the H2 mechanicals... and work on the cosmetics..
Thanks again!!!  |
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