Newby thread Highjacked - Lets talk about filters!

I'll accept the carefully GM engineered (at considerable expense) intake system on my H3. But I will risk moding the intake on my lawn mower .

[Viet Nam Vette]

Originally Posted by Steve - SanJose

I'll accept the carefully GM engineered (at considerable expense) intake system on my H3. But I will risk moding the intake on my lawn mower .

X2.....

[Xotik H3]

Originally Posted by Steve - SanJose

I'll accept the carefully GM engineered (at considerable expense) intake system on my H3. But I will risk moding the intake on my lawn mower .

I love that response!!

[HUMTECH]

To add to xotik's post, more air flow into the combustion chamber the computer will add more fuel when it senses A lean mixture, add A cold air intake and the air is more dense again allowing more air molecules into the combustion chamber again more fuel will be added. Now you need to get it out for it to be truly efficient which will require exhaust upgrades.

[RubHer Yellow Ducky]

Originally Posted by HUMTECH

To add to xotik's post, more air flow into the combustion chamber the computer will add more fuel when it senses A lean mixture, add A cold air intake and the air is more dense again allowing more air molecules into the combustion chamber again more fuel will be added. Now you need to get it out for it to be truly efficient which will require exhaust upgrades.

for the past year thread after thread has talked about cold air intakes...

AND

for the past year I and others have told people the H-3 comes from the factory with cold air intake. Take a couple of minutes and trace it while looking under the hood. It feeds from (within) the right front fender, not from under the hood.

RYD

[Huck BB62]

Originally Posted by RubHer Yellow Ducky

for the past year thread after thread has talked about cold air intakes...

AND

for the past year I and others have told people the H-3 comes from the factory with cold air intake. Take a couple of minutes and trace it while looking under the hood. It feeds from (within) the right front fender, not from under the hood.

RYD

Exakry!

One other thing that people aren't considering with all their high dollar "less restrictive" systems: The MAF sensor is the same diameter.

All this talk means squat. Dyno sheets are the only thing that I believe and if you're only talking a few horsepower at the sake of dirt ingestion, well, that's a decision that people have to make.

Yea but think of the obscene profit margins on those aftermarket intake systems, and without any real R&D spending. Nice short term business model for some. I like the ones that are considered underhood bling, at least there is some truth in that.

[HUMTECH]

Was talking in general about cold air intakes, not just an H-3 which I realize is cool air fed, just meant in general if your intake air is not cool air fed, modifying this can improve your air density. As for flow through the MAF sensor? Don't get what your saying. The maf sensor is A screen which the diameter is approx the same as the throttle body. No restriction there whatsoever.

[ChevyHighPerformance]

Originally Posted by Huck BB62

Exakry!

One other thing that people aren't considering with all their high dollar "less restrictive" systems: The MAF sensor is the same diameter.

All this talk means squat. Dyno sheets are the only thing that I believe and if you're only talking a few horsepower at the sake of dirt ingestion, well, that's a decision that people have to make.

The 06 H3 has an intake nozzle of about 1.8 inches ID which is the smallest diameter portion of the stock intake which gets eliminated with an aftermarket system like K&N, AEM, Volant,etc. The MAF ID is larger than 1.8 inches.

[Huck BB62]

Originally Posted by ChevyHighPerformance

The 06 H3 has an intake nozzle of about 1.8 inches ID which is the smallest diameter portion of the stock intake which gets eliminated with an aftermarket system like K&N, AEM, Volant,etc. The MAF ID is larger than 1.8 inches.

Now you got me wanting to dissassemble the whole thing and measure stuff.

By the way, ever 10 degrees drop in engine IAT = about 1 percent increase in power output. The best vehicles to put a cold air intake on were the older vehicles that had the breather horns under the hood. I made a huge cold air intake for a Scout one time and it made a huge difference on the trail when crawling. Before the cold air intake, it got hotter and hotter, even though I had a big custom four core radiator.

How'd you modify your intake to make it a true cold air intake? On our Denali, the intake also takes from the fenderwell. The plastic and foam, believe it or not, did not even line up correctly. I took it all apart, carved out the metal with a die grinder to match the plastic's opening making it much larger. I picked up almost a 1mpg increase in fuel economy. Pretty good for free fixin's!

The exhaust system on the H3 looks pretty clean. I'm not fond of the squashed area under the floorboard but it looks pretty smooth. I've often wondered how well the exhaust ports meet up with the header and if they could be opened up. There's no doubt that some improvements could be made, but at what cost?

[ChevyHighPerformance]

Originally Posted by RubHer Yellow Ducky

for the past year thread after thread has talked about cold air intakes...

AND

for the past year I and others have told people the H-3 comes from the factory with cold air intake. Take a couple of minutes and trace it while looking under the hood. It feeds from (within) the right front fender, not from under the hood.

RYD

It's not true cold air but does not directly breath warm engine compartment air. On an 80 F day, measure the air inlet temperature (IAT) with an OBDII scanner after pulling out from a 1 minute red light and you see the IAT reach 105 F or so. While you are moving the IAT will cool down but will still be +10 F above outside air.

GM tries to breath from a fendewell, or duct air from outside on mostly all their vehicles.

If you have a dark color H3 like black, the fenderwell area will get a little warmer.

Aftermarket systems tend to breath in more warm engine compartment air. You have to analyze the impact of a higher volume of warmer air on the otto cycle PV cycle to see if you gain or lose.

I've modified mine to truly breath outside air. My IATs are about 2-3 F warmer than the outside air.