02 GMC D/A Hypertech What air cleaner for max air.

http://dieselplace.com/forum/forum_posts.asp?TID=10642&KW=study


lota reading and alot of bickering but some good info in here

Don't waste your money. The thread that ratlover posted is a must read, and of particular relevance a posting from Diesel Tech:

"Well I've run 12.36 at the track with a stock AC filter that had about 10,000 miles on it and was pretty dirty. Some of the guys were busting my balls at the track because of it so I pulled it out and cleaned the surounding area of dirt and closed the airbox with nothing in it. Next pass was 12.38 same mph! So I stuck the dirty filter back in."

Less air slowed you down?http://www.dieselplace.com/forum/smileys/Ermm.gif


Geno

Start from the back of the tread, working forward.

Condensed.........GM, Baldwin good. Aftermarket performance bad.

I think the air cleaner tube is the issue. I don't think the air cleaner itself is. I run the K & N kit and love it. I had a 01 with 175,000 miles on it and the K & N was on it for most of those. It blew a head gasket and the dealer said the motor was perfect inside.


The kit definately helped my mileage and I think a little on power. GM makes the tube more restrictive to deaden sound. There is a company out called True Flow that might have what you need. Just do a search for them.

I've researched the True Flow filter systems, and the results are pretty conclusive against K&N and Airaid. The stock system performed better at stopping dust and dirt over these two. True Flow uses foam as a filter element, and it does a pretty good job. The box is the same as the OEM, but the tube is straighter and larger. No engine code problems like with the others. The box makes sure you don't pull in hot compartment air. Some discussion on pulling oil into the MAP sensor, but this is usually caused by too much oil used in the filter. Aftermarket sytems can help, but you got to weigh the cost. True Flow states that a LLY motor will gain an honest 19 HP. Mine runs pretty damn good now, with only a moster exhaust. I'm averaging 19.5 mpg, highway and around town, with 8,000 miles recorded.


2004 Sierra SLT 2X4

True Flow states that a LLY motor will gain an honest 19 HP. Mine runs pretty damn good now, with only a moster exhaust. I'm averaging 19.5 mpg, highway and around town, with 8,000 miles recorded.


2004 Sierra SLT 2X4

I state that I gained an honest 25 HP on my stock air intake. So there, the stock intake is better. You know until someone gets a truck and runs all the aftermarket stuff on a dyno you will be at the mercy of the marketing suits. Disel Tech ran the same times with a dirty filter as without. Nothing wrong with the stock filter and I strongly suspect that there is nothing wrong with the stock intake. Go read spicer's thread on air filters. GM, Baldwin good, Wix not to shabby, aftermarket junk.

But it sounds like you got your mind made up. So enjoy your new toy.

Jim

jholly


Hmmmmmmmmmmmmm how an what you do to your stock intake to gain 25 hp. Fill us in let us know or is this a high tech secret.


Geno

jholly


Hmmmmmmmmmmmmm how an what you do to your stock intake to gain 25 hp. Fill us in let us know or is this a high tech secret.


Geno

Well, Geno, I don't need to do a thing. I just need to make the claim. Simple, isn't?

Jim

What I thought


Geno

Jim,


I then can simply state that my stock filter and stock fuel in my truck give me an extra 26HP and some extra torque like stuff...


and I am having the as seen on TV guys promo it soon

What I thought


Geno

Well, Geno, I didn't want to let the cat out of the bag, but alright, I'll let you in on my secret ... promise you won't tell.

I wipe the inside of my stock intake with rain-x. Makes it so slick the air pracatically goes in there by itself.

Jim

Jim; are you trying to hi jack my Rain X thread?




http://www.dieselplace.com/forum/smileys/Big Smile.gif

P.S. the only benefit of after market filters is to lower Exhaust Gas Tempseratures.

No real proof on increases in H.P.

Jim; are you trying to hi jack my Rain X thread?

No, but Geno wanted to know my secret. http://www.dieselplace.com/forum/smileys/Smile.gif

And for lowering EGT's, I'd just work on the exhaust side. Now there I think you could get a few HP. My feeling on the air intake is the big three always want to one-up each other on HP, so they aren't going to leave 15-20 HP on the table with bad air intakes. They are going to have an effecient intake. The exhausts they are probably more tied to a quite exhaust because most don't want the flowmaster growl, so some gain can be made there.

Jim

"P.S. the only benefit of after market filters is to lower Exhaust Gas Tempseratures."

Max Owner, Please explain this to me, because I don't believe it. I suppose one could claim that by changing air filters and air flow / restriction, one would would change air / fuel ratio and therefore change exhaust gas temperatures, but that skips the fact that with our trucks flow with the stock air filter was effectively the same as no air filter for somebody's drag strip times (real world dyno.) I've have never heard anyone demonstrate that changing air filters alone did anything to EGT, yet it is a commonly accepted fact that changing exhaust systems to a larger, more free flowing design will help lower EGT.


Just looking to learn something new, but a skeptic at heart!

Well, from my understanding.......more airflow allows more air in, creating cooler temps for intake. Exhaust creates less back pressure and also allows heat to get lost quicker.
Cooler temps comming in, keeps combustion temps down.

Maybe all ad hype, for all I know.Edited by: Max Owner

"P.S. the only benefit of after market filters is to lower Exhaust Gas Tempseratures."

Max Owner, Please explain this to me, because I don't believe it. I suppose one could claim that by changing air filters and air flow / restriction, one would would change air / fuel ratio and therefore change exhaust gas temperatures, but that skips the fact that with our trucks flow with the stock air filter was effectively the same as no air filter for somebody's drag strip times (real world dyno.) I've have never heard anyone demonstrate that changing air filters alone did anything to EGT, yet it is a commonly accepted fact that changing exhaust systems to a larger, more free flowing design will help lower EGT.


Just looking to learn something new, but a skeptic at heart!








I did numerous back to back tests between a stock box, stock box with K&N, and a full AFE set up. End result was always 100 degree drop in max egts (edge box records), about 2 psi more boost, and a slight increase in track et and mph (over 5 runs recorded for each set up). I'm happy to see the egts drop, period.

I saw the exact same PSI and track times with a swisscheesed stock box and a uni as I did with a stage 2 afe running a hot OJ. Need more track testing but I havent seen a gain yet. only did 3 runs with the afe. same day btw.


The above filter study tested just the filters, not intakes. Anyway you look at it K&N was bad compared to everything else. But is it bad enough to cause damage? Maybe maybe not depending on the conditions and its all relative and debateable.

duramaxtom, are you saying that you saw equal improvements with either the K+N in the stock box OR the AFE intake / filter? Both were dramatically better than the stock filter?