Wanting to change your air intake system? Look at this first

[centurion]

This is from cayman forums:

ISO 5011 Duramax Air Filter Test Report

Teaser:

Accumulative Gain:
"Accumulative Gain" is the total amount of dirt that passed through the filter during the test.

(Note: The Purolator was reported to have a seal malfunction during the test and passed more dirt than it would have with a good seal.)

 

[phil]

Re: Wanting to change your air intake system? Look at this first

massive logic, more flow means more dirt passes through casue the filter isnt as dense.

so the UNI is the best flowing. They have always been good on motorcycles.

 

[centurion]

Re: Wanting to change your air intake system? Look at this first

how much dirt need to get in before engine gets affected, I wonder.

 

[Darth Vader]

Re: Wanting to change your air intake system? Look at this first

i thought dirt will be vapourised due to explosion in the cylinder ?

 

[phil]

Re: Wanting to change your air intake system? Look at this first

not much, hahah

look at any form of dirt racing. engines get rebuilt after 2 or 3 race meets, motocross almost after every meet. It would last longer for sure, but they never chance it.
I used to clean the filter after every ride, and new piston and rings maybe after every 6 rides. Trust me, filter is dirty. And one ride if you think about maybe 1 hour in total, the other 6 hours spent lying on the grass in exhaustion, haha

all the open pods people use really are crap, especially the foam ones, how often do you think they clean them?Like never i bet. Drop ins are the best with the stock or slightly upgraded cold air intake.

 

[phil]

Re: Wanting to change your air intake system? Look at this first

i thought dirt will be vapourised due to explosion in the cylinder ?

maybe, but on the downward stroke vefore the "explosion"what has the dirt done? made nice scores on your cylinder walls and nicked a few rings, swee

 

[centurion]

Re: Wanting to change your air intake system? Look at this first

Why people change oil every 10K km or even every track day but still use K&N??? Is it because they use K&N that's why have to change oil so often? LOL!

 

[phil]

Re: Wanting to change your air intake system? Look at this first

no, i understand that. oil gets stressed and loses viscosity.

on race stuff, gotta be anal. my bikes were pulled apart to the frame after every ride, hehe

 

[Herman]

Re: Wanting to change your air intake system? Look at this first

lol.
i actually wanted to get open pods.
but after hearing what phil said... i think i'll stick to my K&N drop-in.

 

[phil]

Re: Wanting to change your air intake system? Look at this first

get an open pod if ya want. but they really are for engines with lots of mods and can use the open pod effectively

even my wifes car has a drop in, but i drilled 4 inch holes in the airbox too, hehehe, sounds sweet.

 

[Darth Vader]

Re: Wanting to change your air intake system? Look at this first

maybe, but on the downward stroke vefore the "explosion"what has the dirt done? made nice scores on your cylinder walls and nicked a few rings, swee

i think 100,000km still ok.dirt that got into cylinder will be quite soft,light and small.
just like smashing eggs on a stone.stone may crack after a billion egg hits.

 

[phil]

Re: Wanting to change your air intake system? Look at this first

ok mate......

 

[Ahbengdriver]

Re: Wanting to change your air intake system? Look at this first

dirt get and end up where? In the engine oil? Is that why its black?

If so then simple, change oil every 5k km !

 

[centurion]

Re: Wanting to change your air intake system? Look at this first

dirt get and end up where? In the engine oil? Is that why its black?

If so then simple, change oil every 5k km !

ending up in engine oil is OK, but if it's significant enough to score the cylinder liners/walls then ... not OK.

 

[PerverTT]

Re: Wanting to change your air intake system? Look at this first

The rubbish that sucked into your air filter is, unfortunately, not harmless fluff that gets vaporised on combustion. A good part of what passes as "dust" is actually very fine particles of hard stuff like granite. The granite comes from stone chips used to make roads. There could well be other crap like fine silica and so on. These ultra fine particles can and do score the cylinder walls in your engine. I doubt if the metallurgical treatments used in modern engines is tough enough to resist this type of scoring in the long run. That's my take on the issue, but I would like to hear from others who know better.

 

[Darth Vader]

Re: Wanting to change your air intake system? Look at this first

The rubbish that sucked into your air filter is, unfortunately, not harmless fluff that gets vaporised on combustion. A good part of what passes as "dust" is actually very fine particles of hard stuff like granite. The granite comes from stone chips used to make roads. There could well be other crap like fine silica and so on. These ultra fine particles can and do score the cylinder walls in your engine. I doubt if the metallurgical treatments used in modern engines is tough enough to resist this type of scoring in the long run. That's my take on the issue, but I would like to hear from others who know better.

i am more worried about dirt getting into the turbochargers than the engine cylinders.the turbochargers will fail first.

 

[centurion]

Re: Wanting to change your air intake system? Look at this first

huh? Turbochargers are cheap to replace! It's not as if your turbos have very fine tolerances like a piston engine..... so they won't get affected.

 

[Darth Vader]

Re: Wanting to change your air intake system? Look at this first

huh? Turbochargers are cheap to replace! It's not as if your turbos have very fine tolerances like a piston engine..... so they won't get affected.

i thought they spin at 200,000 rpm.engine rev at 7000rpm.28 times the damage.

 

[phil]

Re: Wanting to change your air intake system? Look at this first

200000 rpm? not even a turbo molecular pump runs that hard.

at 200krpm, your turbo would be creating vacum mate. Like a black hole! it would suck the engine into itself.

 

[Darth Vader]

Re: Wanting to change your air intake system? Look at this first

200000 rpm? not even a turbo molecular pump runs that hard.

at 200krpm, your turbo would be creating vacum mate. Like a black hole! it would suck the engine into itself.

all right! the ultimate B*** Job.