K&N Typhoon Vs. Stock Intake

[socalsilverRL]

^my car has been in the shop since the beginning of the month. ill do the tests as soon as possible.

Originally Posted by eco

I guess I see how your numbers work, but I do not believe that the stock air box flows better than the K&N. The BIG red flag to that from my experience is the 1-2.5psi gain in boost following install w/ the only weather condition change was 1 degree in ambient temp. I also noticed a drop in IAT1, contributing to a drop in IAT2, even if it was only 2-6 degrees. Like stated previously, I think that the data you collected is skewed by the diameter and change in the air turbulence with a larger, smoother intake tract.

exactly, the stock intake tubing is larger and flows just as well. You have an interceptor. Go ahead and try it yourself.

[Eco-Mod]

Originally Posted by socalsilverRL

exactly, the stock intake tubing is larger and flows just as well. You have an interceptor. Go ahead and try it yourself.

No, what I meant was the K&N has a larger and smoother inner diameter, so there is a higher volume in which the air can move, as well as a less turbulent path. Because of that larger area in which the air can move, and not having a larger MAF sensor to compensate, the results are only speculative unless a full bodied MAF sensor is used such as one from a GM V8.

What I have seen using my interceptor is an increase in MAF frequency, increase in boost pressure, and decrease in SCIP at WOT(lower number = less intake restriction). These along with dyno numbers support my case. I'm not by any means discrediting you or saying you are wrong, just pointing out variables along with what I've seen with my car.

[socalsilverRL]

^measure the stock intake tubing, then measure the K&N...im not joking, when i say the stock intake tubing is 1/16 to 1/8" larger. the numbers on my graph dont lie. I was only trying to say that the Stock intake flows as well (if not better) than the K&N

who knows for sure...i still ahve to re-test my hypothesis...this time with HPT...

[Pierre]

Originally Posted by Eco-Mod

I guess I see how your numbers work, but I do not believe that the stock air box flows better than the K&N. The BIG red flag to that from my experience is the 1-2.5psi gain in boost following install w/ the only weather condition change was 1 degree in ambient temp. I also noticed a drop in IAT1, contributing to a drop in IAT2, even if it was only 2-6 degrees. Like stated previously, I think that the data you collected is skewed by the diameter and change in the air turbulence with a larger, smoother intake tract.

Hmmm...

For that 1 degree drop was the air density the same? From what I can gather the stock systems AIT1 is ony 3-5 degrees higher than ambiant. Given that the air intake on the stock system and the K & N sit in the same place I would say there is limited room for drop in AIT1 over ambiant.

Keep in mind that the intercooler efficiancy is the dominant factor for AIR2 temperatures. A 5 degree drop in AIT1 will equal less than 2 degrees AIT2 given the same ambient temperature.

Pierre

[socalsilverRL]

^when i measured the ambient temp the second time, the temp was waivering between 48-49°...it was later in the evening, and there was NO wind at all...i dont think the humidity would have changed too much in the hour that it took to install the stock box. Both runs are at the same altitude, on the same stretch of road, through the same gears at WOT.

I tried to keep all the variables as similar as possible.

Originally Posted by eco

The BIG red flag to that from my experience is the 1-2.5psi gain in boost following install

and again, if you want to test the theory yourself, you can, just use the interceptor, and try to repeat the same tests...

[RL_Clark]

I'm just wondering whether or not you had a chance to retest your intake variables. I bought a K&N drop-in that should get here today. BTW, you can get it on AutoAnything.com for $41.99 and free shipping. I don't have an interceptor, but I'll check it with the butt dyno and hopefully it will not have been a waste of money.

Thanks again socal.

[socalsilverRL]

no worries...

...i havent been able to re-test this, as my car has been in and out of the shop for the last 3 months...

...and i may have valve damage from the clogged cat...

[RL_Clark]

I'm sorry to hear that.
Good luck with it all

[dewalt06]

so a question to all!!!! what intake should i go with..... the k-n, weapon R, or the drop in?????

[socalsilverRL]

^what ever makes you happy...thats the one to go with. there is no real data on whice one is best...i have the drop in running right now. I like the quietness...i can now hear my exhaust again...lol