Newby thread Highjacked - Lets talk about filters!

[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.

[Huck BB62]

Originally Posted by Xotik H3

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

And most of the soot that DOES build up is when the engine's cold. The I-5 is a tight, well built, modern, fuel injected engine. The oil is not getting contaminated that much, nowhere near as much as a carbed engine of yesteryear. It heats up very quickly, and has a top notch computerized, closed loop fuel injection system. When it's operating temperatures are up to normal, it has very little blow by contaminating the oil. Even in that event, soot contaminates are nowhere equal to silica contaminates (dirt, very HARD dirt, second only to diamonds on the hardness scale)

[ChevyHighPerformance]

Originally Posted by Huck BB62

And most of the soot that DOES build up is when the engine's cold. The I-5 is a tight, well built, modern, fuel injected engine. The oil is not getting contaminated that much, nowhere near as much as a carbed engine of yesteryear. It heats up very quickly, and has a top notch computerized, closed loop fuel injection system. When it's operating temperatures are up to normal, it has very little blow by contaminating the oil. Even in that event, soot contaminates are nowhere equal to silica contaminates (dirt, very HARD dirt, second only to diamonds on the hardness scale)

Blow-by is a different contamination. How about the dirt that comes from the fuel? I agree that silica is one of the worst contaminates.

[ChevyHighPerformance]

Originally Posted by Xotik H3

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

The point is that there are other sources of dirt in the engine - my first sentence.

What color is the oil when you change it? Where do you think this contamination comes from? Don't you think these suspended particles get pumped around the engine?

GM found that if you use company XXX's fuel you can go longer before oil changes because thier fuel burns cleaner and doens't contaminate the oil as much.