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09-21-2007, 07:18 PM
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Elcova Newbie
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Join Date: Sep 2007
Location: Portland, OR
Posts: 3
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H3 Engine Performance Up-grades
I just purchased a 06 H3 and love the rig, but like most wanted more power. I just installed a K&N cold air intake (dyno claims 18.7 HP) I also put a flowmaster muffler and removed the stock exhaust resinator with a straight pipe. I noticed a nice increase in power, but wanted more.
I am interested in the: JET Performance Chip. The stage 1 dyno claims 15HP, the stage 2 I have not seen any dyno claims. Has anyone done the JET chip?
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09-21-2007, 09:31 PM
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Hummer Veteran
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Join Date: Mar 2007
Posts: 51
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Re: H3 Engine Performance Up-grades
Check the intake snorkel, the pipe that goes to the fender. It has only an 1.8 inch inner diameter. This forms a restriction because the diameter of the rest of the intake piping is 3 to 3.5 inches.
Replace it with a 3" short pipe or similar. Just remember to seal it right.
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Victory Red 2006 H3 Luxury, Automatic, OEM steps, Sunroof. MODS: Torsion bars 4X, Front Bilstein shocks, Front adjustable swaybar links, Rear Rancho shocks, rear 6.5 inch shackles, Rear Quick disconnects swaybar links, Black rims, Hidden hitch, Husky mud flaps, Trasko spin on filter, No intake resonator, Enlarged 3" snorkel opening, No muffler
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09-21-2007, 10:33 PM
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Hummer Guru
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Join Date: Dec 2005
Location: In a FREE U.S.A. where Marxism, Socialism & Communism is not allowed !
Posts: 5,485
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Re: H3 Engine Performance Up-grades
Quote:
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Originally Posted by Jim Klee
I just purchased a 06 H3 and love the rig, but like most wanted more power. I just installed a K&N cold air intake (dyno claims 18.7 HP) I also put a flowmaster muffler and removed the stock exhaust resinator with a straight pipe. I noticed a nice increase in power, but wanted more.
I am interested in the: JET Performance Chip. The stage 1 dyno claims 15HP, the stage 2 I have not seen any dyno claims. Has anyone done the JET chip?
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Ain't NO WAY !!!!
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REMEMBER
History, be it in 1 Year, 10 Years, a Hundred Years or One Thousand, will show that those people who voted for John McCain in the United States Presidental Election of 2008 were true patriots...
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09-21-2007, 10:43 PM
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Hummer Expert
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Join Date: May 2005
Location: Southern California
Posts: 829
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Re: H3 Engine Performance Up-grades
Can you say Alpha?
If you really want more HP save your money and put it toward a V8 Alpha
There is no substitute for cubic inches.
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Desert Dan
H3 2006 Adventure/Lux/5-speed/sunroof/rock rails/underbody skids/block heater/Boulder Grey/ Defender Roof Rack
Jeep TJ Rubicon 2003
1988 Jeep Cherokee
Gone - But- Not Forgotten 4x4's
1994 Jeep YJ
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1970 Jeep CJ-5
1962 Willys Wagon
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09-21-2007, 11:24 PM
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Hummer Authority
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Join Date: Aug 2006
Location: Oregon
Posts: 1,055
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Re: H3 Engine Performance Up-grades
According to JET's website they don't make a chip for the H3. Just the throttle body spacer.
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06 Slate Blue, manual, Adv. Pkg., Monsoon, sunroof, brushguard, rock rails, ucp, tow pkg, K&N intake, underhood air compressor, Warn Lights, Spider rear Diff. cover
Black Sheep Hummer Squadron
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09-22-2007, 01:50 AM
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Elcova Newbie
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Join Date: Sep 2007
Location: Portland, OR
Posts: 3
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Re: H3 Engine Performance Up-grades
The JET chip is for the Chevy Canyon P/U with the same engine. I was told it would work with the 3.5L in the H3
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09-22-2007, 01:52 AM
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Elcova Newbie
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Join Date: Sep 2007
Location: Portland, OR
Posts: 3
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Re: H3 Engine Performance Up-grades
Regarding the K&N cold air-intake:
The 18.7HP gain is the dyno sheet that came with the K&N kit. This not my dyno, but what K&N is marketing...
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09-22-2007, 11:33 PM
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Hummer Authority
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Join Date: Aug 2006
Location: Oregon
Posts: 1,055
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Re: H3 Engine Performance Up-grades
Quote:
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Originally Posted by Jim Klee
Regarding the K&N cold air-intake:
The 18.7HP gain is the dyno sheet that came with the K&N kit. This not my dyno, but what K&N is marketing...
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Look at what rpm they got that gain. At 6000 rpm. How often are you running your engine at 6000 rpm?
You will definitely hear a difference, which will lead you to drive different, which will make you feel like there is a difference with the new intake.
Don't get me wrong, I like the idea of a high flow intake, but I don't like having an exposed air filter in an engine bay that gets pretty dirty from offroading. Some people have reported issues with their mass flow air sensors from the oil that comes off the filter.
When I had my K&N installed I heard a noticeable difference, but the air resonator was removed to put on the intake. Now that I have gone back to the stock air intake, I don't feel a difference between the two.
__________________
06 Slate Blue, manual, Adv. Pkg., Monsoon, sunroof, brushguard, rock rails, ucp, tow pkg, K&N intake, underhood air compressor, Warn Lights, Spider rear Diff. cover
Black Sheep Hummer Squadron
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09-23-2007, 03:58 PM
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Hummer Veteran
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Join Date: Aug 2006
Posts: 26
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Re: H3 Engine Performance Up-grades
I have the K&N kit and feel the difference. I have a 5 speed and yes the difference is only at the high end of the tach. I keep it revved and it is noticable between 4-6000.
Very annoying vibration at idle and I have to feather the throttle at a stop sign.
Does anyone know if idle can easily be raised a couple hundred RPM to make this go away?
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03-09-2011, 07:48 AM
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Elcova Newbie
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Join Date: Mar 2011
Posts: 1
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Re: H3 Engine Performance Up-grades
Quote:
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Originally Posted by Jim Klee
I just purchased a 06 H3 and love the rig, but like most wanted more power. I just installed a K&N cold air intake (dyno claims 18.7 HP) I also put a flowmaster muffler and removed the stock exhaust resinator with a straight pipe. I noticed a nice increase in power, but wanted more.
I am interested in the: JET Performance Chip. The stage 1 dyno claims 15HP, the stage 2 I have not seen any dyno claims. Has anyone done the JET chip?
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Did the air intake and the new muffler reduced your miles per gallon? |
04-07-2011, 11:13 AM
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Hummer Novice
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Join Date: Apr 2011
Posts: 10
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Re: H3 Engine Performance Up-grades
i would go by the book. the added power comes at the maximum rpm limit. but one doesn't normally race at that kind of torque, so just check if adding JET is worth it or not.
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