[Lex2021]

Its not just Project Farm.

https://bobistheoilguy.com/air-filtration-test/

"That said, both the cotton gauze type (K&N) and foam filters (Amsoil & Jackson Racing) showed the same levels of filtration. Both performed poorly compared to the fiberous or paper filters (Napa, Baldwin, and Mazda)."

I don't know if this one is properly peer reviewed but there are SAE references to refer to if you're so inclined.

https://pdf.sciencedirectassets.com/...qa&type=client


"The filtering efficiency test conducted on OEM and K&N air filter shows that OEM air filter exhibits superior air filtering qualities compared to K&N filter. It should also be noted that the actual filtering efficiency of K&N air filter will be greater than obtained from the test. This was because in real life condition the actual air filter surface area exposed to dust is higher compared to that exposed during the test."

https://www.project200.com.au/dm-iso5011/

"A filter with a 98% efficiency rating would pass roughly twice as much dust as a filter with a 99% efficiency rating, so what seems like a small difference is actually quite a large one"

[NotFast]

I'm just here to hear what the other dealer says when you take in it for the 'free' tune.

[Lex2021]

Indeed, sorry to hijack your thread fine sir. I will desist.

[UnknownJinX]

The GM CAI filter looks like a cotton unit to me, albeit a dry one. I wonder about the filtering efficiency, then, especially since it's a factory part.

Originally Posted by Petrol Head

Our cars already have a cold air intake from the factory. In fact, all modern cars do. They’ve been running the air intake tubes to open ports in the fender liners or to the core support above the radiator on cars from the factory since the 80s once fuel injection took over from carburetors.

The GM CAI does have a straighter flow, though.

If you take the OEM one apart, you will see that the air enters through a small opening in the airbox, goes up through the filter, then turns and enter the intake accordion tube, and another turn into the throttle body. With the GM CAI, the air enters through the cone filter and enters that bend into the throttle body. It provides a much less convoluted path.

I do generally agree that an intake doesn't do much for an NA car, though. On my old RX-8, I never bothered with an aftermarket intake as the factory intake is already really, really good. The flow path is very simple to begin with for that car.

[Invertalon]

Damn, it crazy how people become so selective/judgemental on how others spend their money.

Yet those same people who criticize a CAI doing nothing will install side skirts, splitters, fancy gas cap covers and engine bay plaques and other cosmetic only mods that do absolutely nothing, too.

Arguing about what the CAI does is not even on topic with what the OP was asking Plenty of other CAI topics that have gone over that over and over.

[Lex2021]

It's just a discussion. Its fun. Not meant to be judgmental. Car talk, shop talk.

[Wobble Goat]

Originally Posted by FarmerFran

10,000µm? that is almost a half inch - that is not a particle anymore

You are correct, that was incorrect math. I meant 127 microns which = .005 inch


That said, intake looks good.


Personally I embrace this formula. DIY = Budget > Function > Form

Hence I put a $75 TBSS intake on my GTO rather than a $800+ FAST.

[FarmerFran]

At dealer now. Took a copy of the certificate page, took the car and said be right back. Did not even flinch.

[Paintslinger16]

]Dealer is to charge reflash to labor code to 0601558 according to shopChevyparts.com

[FarmerFran]

Originally Posted by Paintslinger16

]Dealer is to charge reflash to labor code to 0601558 according to shopChevyparts.com

Yep, right on the cover of the directions.

[FarmerFran]

Any reason for them to do a raod test?

[Lex2021]

Joy ride...shameful use of your gasoline.

[LT4Greg]

Originally Posted by FarmerFran

Any reason for them to do a raod test?

No way!

[ZED SLED]

Originally Posted by FarmerFran

Any reason for them to do a raod test?

Probably smell like McDonalds when you get it back.