H3 Engine Performance Up-grades

[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...

[H3slate]

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...

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.

[Kaiser Souza]

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?

[cdmintmi]

just got mg back from the dealer with same problem. tech says mustve gotten some "cheap" gas (although i dont see how thats possible these days) and had some carbon build up in the throttle body. they cleaned it and replaced a sensor (since im in the mountains of nc now) runs perfectly now.

[6pack]

With what I did in my sig, I noticed a nice improvement (prior to the 35" tires). The K&N without the resonator is quite loud, especially over 4k rpm's, and that's where you notice the power the most with my setup. Not to usefull for the trail, but nice on the highway. I had a Jet chip on a previous truck and didn't think it did anything. I wouldn't spend money on one of their products again.

[wpage]

With all due respect to the GM mark of excellence there are some things we mortals can do to enhance performance...
Hoping there are some Thomas Edison types out there to solve this oil mess we are in lets not close our eyes to even marginal ways to improve what we've got. Just like we wish we had better lungs for ourselves...
Enhanced respiration for the engine cant hurt...
There are some cold air intake mods that are out there for do it yourselves (do a google search) or for the lazy rich folks to buy from the usual suspects for over time will save you your investment dollars. Especially while fuel prices are rising.
On the back end there are header type exhaust systems to help folks that are listening to the mantra of a clean colon is the secret to long life... There is Magna Flo and other manufactures of oversize and over sounding exhaust systems for the rear end crew.
In the middle of the road there is the chip crowd that favors the electronic approach to saving the H3. Here we second guess the genius at GM to prove our equation is better than Poindexter's and spend $500.00 to some marketer who has better mpg religion than thou...
In summary go to the Home depot buy some black pipe and glue cut some holes in your intake manifold and hope for the best. Its a free country and your warren tee guy will surly not care that you have no concern for the structural integrity for his masters design

[TANDREW]

How about PCM for less? Whats the take on this? Ive heard a lot of people are happy with the tune. How about it guys.....