Newby thread Highjacked - Lets talk about filters!

[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.

[Viet Nam Vette]

I like the ones that are considered underhood bling, at least there is some truth in that.

[Huck BB62]

Originally Posted by 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.

My point on the MAF sensor is that it gets to stay the same size. I looked at my system this afternoon and can't find anything significantly smaller in diameter than the MAF. At 6000rpm, you MAY get some benefit from a smoother aftermarket, but you gotta go through that diameter of restriction, the MAF.

I'd like to hear from anyone that's dynoed their H3 with both stock and aftermarket intake system.

[raptorman53]

Originally Posted by Huck BB62

My point on the MAF sensor is that it gets to stay the same size. I looked at my system this afternoon and can't find anything significantly smaller in diameter than the MAF. At 6000rpm, you MAY get some benefit from a smoother aftermarket, but you gotta go through that diameter of restriction, the MAF.

I'd like to hear from anyone that's dynoed their H3 with both stock and aftermarket intake system.

Huck I understand what your saying about the MAF sensor. That being the diameter that the MAF is, it will only allow a certain volume of air. What we don't know is if the volume of air coming into the intake is the maximum volume the MAF sensor can allow.

[ChevyHighPerformance]

Don't loose sight of other sources of dirt in the engine. For those of you with the stock intake, stock filter, and stock exhaust - rub your finger around the inside of the tailpipe. That black soot came from the combustion and made its way past the cat in the exhaust manifold, past the main cat, past the resonator, and past the muffler. This is just what made it through all these barriers - think what got trappped. The size of the particles in this soot ranges the gambet in sizes. Some of this soot gets trapped in the oil, somes makes it past the oil filter, gets pumped through the bearings, etc.

Clean the tail pipe and drive through a tank of gas and see what soot came back. I'll bet that this is more dirt that gets past the K&N in that same amount of time.

There's junk in the fuel that gets past the fuel filter too.

[Xotik H3]

Originally Posted by ChevyHighPerformance

Don't loose sight of other sources of dirt in the engine. For those of you with the stock intake, stock filter, and stock exhaust - rub your finger around the inside of the tailpipe. That black soot came from the combustion and made its way past the cat in the exhaust manifold, past the main cat, past the resonator, and past the muffler. This is just what made it through all these barriers - think what got trappped. The size of the particles in this soot ranges the gambet in sizes. Some of this soot gets trapped in the oil, somes makes it past the oil filter, gets pumped through the bearings, etc.

Clean the tail pipe and drive through a tank of gas and see what soot came back. I'll bet that this is more dirt that gets past the K&N in that same amount of time.

There's junk in the fuel that gets past the fuel filter too.

That black soot is called exhaust. It has nothing to do with external dirt, that soot is Hydrocarbons as a by product of combustion.

[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?