Cold air intake

[Andrew2015]

Curious on any cold air intakes anyone has put on their pickup and seen better gas mileage and hp? Also if an aftermarket throttle body spacer?

2015 Chevy Silverado 5.3

[LS1CMR]

I installed the K&N cold air kit on my 2015 Denali. Noticed a little better mileage. You will hear the intake noise as well, slightly annoying in 4 cylinder mode and low rpms.

[1SLOW1500]

Tb spaceris a waste. 

[btj_z71]

Before and after with k&n intake.  Truck was better performing, but not much difference in mpg if any.  Been on my truck for 2 years now.

[Grumpy Bear]

Just took the K & N off mine (drop in) when UOA showed it wasn't filtering as it should. A filter needs to filter first. No it wasn't damaged and yes it was sealed. I've used them for about 40 years. Just never looked at the oil that hard before. 

[qwank]

42 minutes ago, 1SLOW1500 said:

Tb spaceris a waste. 

yup, if something so small really helped, GM would have just made the intake that much longer. 

[BigBlueLB756]

Your stock air box is sealed against under-hood hot air.  You can open up the fender opening of that box for more air intake for free.  The box-to-manifold tube can be replaced with an AirAid MIT and a dry replacement filter for smoother air flow and some "growl", if that's your thing.  Oiled filters may mess up your MAF.

 

 

 

 

[batman900]

15 hours ago, Grumpy Bear said:

Just took the K & N off mine (drop in) when UOA showed it wasn't filtering as it should. A filter needs to filter first. No it wasn't damaged and yes it was sealed. I've used them for about 40 years. Just never looked at the oil that hard before. 

What numbers were looking bad? Silicon? I have a k&n in the wife's RAV4 and now my truck just for the ease of cleaning and re-using. I've also used them for many years without issue but never did an UOA. Any chance you could post it up for us? Thanks man

[diyer2]

Grumpy,

Post up the numbers that had you concerned enough to remove your K&N drop in.

I have used them for years.

I know nothing about UOA's.

 

[pronstar]

Most scientific test of K&N (and other) filters I’ve seen:
https://nicoclub.com/archives/kn-vs-oem-filter.html


Sent from my iPhone using Tapatalk Pro

[Black02Silverado]

From the UOA's that individuals have run K&N air filters on, I have seen where the silicon has gone up do to the air filter not filtering out like it should.  Terry Dyson at dysonanalysis had hard data on this issue.  He sees where the K&N works just fine but then there are the ones where the silicon is high on UOA's running K&N air filters.  One just can't tell until they run a used oil analysis.

 

You also get issues if you do not oil it correctly to get a fine oil film on your mass air flow sensor.  So if you do run a K&N it is a good idea to get some cleaner made to clean the MAS each time you clean your air filter.

[Grumpy Bear]

1 hour ago, batman900 said:

What numbers were looking bad? Silicon? I have a k&n in the wife's RAV4 and now my truck just for the ease of cleaning and re-using. I've also used them for many years without issue but never did an UOA. Any chance you could post it up for us? Thanks man

 

1 hour ago, diyer2 said:

Grumpy,

Post up the numbers that had you concerned enough to remove your K&N drop in.

I have used them for years.

I know nothing about UOA's.

 

Sorry guys I wasn't following this thread so I saw it when it popped back up in the "Popular Now" area. 

 

11 ppm silicon and 24 copper. Dyson noted that the silicon is about double 'acceptable normal' for a daily driver and that copper "could be in part' abrasive wear of rod big end AND/OR reactive chemistry. 5-7 ppm is the silicon target. Silicon is also part of many antifoam additives so getting to zero is near impossible. Hope that is helpful. 

 

PS. I also had a mild fuel rich condition which traced to 'dust' on the MAF sensor. The filter on visual inspection looked okay but there were what could be called small, micro tears here and there almost like the weave wasn't tamped  during manufacture. 

[diyer2]

24 minutes ago, pronstar said:

Most scientific test of K&N (and other) filters I’ve seen:
https://nicoclub.com/archives/kn-vs-oem-filter.html


Sent from my iPhone using Tapatalk Pro

Thanks.

Interesting.

I have used K&N's for a lot of years.

 

[Grumpy Bear]

7 minutes ago, diyer2 said:

Thanks.

Interesting.

I have used K&N's for a lot of years.

 

X2. I was as surprised as anyone. I have them on everything they make them for. I'd still use them if I was still racing or I would find a way to double up on ACDelco element. We use to stack two back in the day. Lord I'm getting old 

 

I would have loved that link more if the advertising didn't take away about a quarter of every graph. I ever mention I hate GREED! 

[diyer2]

19 minutes ago, Grumpy Bear said:

 

Sorry guys I wasn't following this thread so I saw it when it popped back up in the "Popular Now" area. 

 

11 ppm silicon and 24 copper. Dyson noted that the silicon is about double 'acceptable normal' for a daily driver and that copper "could be in part' abrasive wear of rod big end AND/OR reactive chemistry. 5-7 ppm is the silicon target. Silicon is also part of many antifoam additives so getting to zero is near impossible. Hope that is helpful. 

 

PS. I also had a mild fuel rich condition which traced to 'dust' on the MAF sensor. The filter on visual inspection looked okay but there were what could be called small, micro tears here and there almost like the weave wasn't tamped  during manufacture. 

confused.

Where is the silicon coming from?