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-   -   K&N's Dyno chart (http://www.jeepgarage.org/f108/k-and-ns-dyno-chart-29274.html)

bigpanda 10-03-2011 09:41 AM

K&N's Dyno chart
 
1 Attachment(s)
So, some of you may have seen the dyno chart of K&N CAI kit for V6 on different thread.

I'm already using K&N OEM replacement filter(panel type) and do you think I should stick with current set-up or try new K&N CAI kit?

moosehead 10-03-2011 09:48 AM

Re: K&N's Dyno chart
 
hmmm. +10.75 hp and +10 ftlbs at circa 5300+ rpm's? let's just take it for face value. not bad for the pentastar.

they also seem to have been able to get a small heat shield around the intake filter and put 'er right up against the snorkle - see step 16 in attached:

http://www.knfilters.com/instructions/77-1560_inst.pdf

robpp 10-03-2011 10:21 AM

Re: K&N's Dyno chart
 
also remember that mods will NOT all add to HP increases. in toehr words if you have say a modded exahust that ALREADY increases Hp by a few.....the intake will not necessarily add 10.xx more.

last they did it on a dyno not on the street.....i DRIVE onthe street/

bigpanda 10-03-2011 11:05 AM

Re: K&N's Dyno chart
 
My biggest concern is that loosing some HP at lower RPM. OEM intake at least has air chamber to hold air to be used during kick-down. But K&N's has just straight tube.

Kev- 10-05-2011 03:28 AM

Re: K&N's Dyno chart
 
It appears to be a very significant loss of torque at lower RPMs. Dropping off steeply below 3100, and is nearly -40 lb/ft at 2600.

The gains are mostly above 4500. How often do you rev past 4500?

Also, their method of showing gain is based on whichever point in the curve had the greatest difference. This is not the same as having 10 more horsepower, as it's NOT +10 at the peak.

I looked up the actual chart on their site (higher resolution). The peak torque difference is about 3 lb/ft, with stock peak at 4500 and KN peak at a broader range of 4600-5300. The peak HP is difference is also about 3 hp at equal RPM (6300), with a difference of 2 or less until about 4900 rpm.

Some engines get a big boost from bolt on upgrades, but some either don't, or will have a significant trade-off at the low end like this one.

bigpanda 10-05-2011 04:33 PM

Re: K&N's Dyno chart
 
Quote:

Originally Posted by Kev- (Post 494311)
It appears to be a very significant loss of torque at lower RPMs. Dropping off steeply below 3100, and is nearly -40 lb/ft at 2600.

The gains are mostly above 4500. How often do you rev past 4500?

Also, their method of showing gain is based on whichever point in the curve had the greatest difference. This is not the same as having 10 more horsepower, as it's NOT +10 at the peak.

I looked up the actual chart on their site (higher resolution). The peak torque difference is about 3 lb/ft, with stock peak at 4500 and KN peak at a broader range of 4600-5300. The peak HP is difference is also about 3 hp at equal RPM (6300), with a difference of 2 or less until about 4900 rpm.

Some engines get a big boost from bolt on upgrades, but some either don't, or will have a significant trade-off at the low end like this one.

You got the point. When I went to a local shop to ask them to make a custom CAI, they suggested to integrate an air chamber with CAI due to possible loss of low end tourque.

So, I'm waiting for Mopar's to see how they do this.

edogg23 10-06-2011 02:23 AM

Re: K&N's Dyno chart
 
It's very possible they just didn't go wot as soon and that is what is causing the big torque difference on the dyno.

Kev- 10-06-2011 03:47 AM

Re: K&N's Dyno chart
 
Quote:

Originally Posted by edogg23 (Post 494868)
It's very possible they just didn't go wot as soon and that is what is causing the big torque difference on the dyno.

I was thinking about that, too, after I posted. Most dyno graphs don't show useful information below around 2500 RPMs. I just did some reading, and dynos apparently have trouble at lower RPMs, so the readings begin usually around 2500.

Therefore, what I said may or may not be true, it's not easily verifiable.

There must be some dynos out there which can measure it, though. Otherwise, how do they actually know that a giant diesel is putting out 1500 lb/ft at 800 RPMs?

Cherodude 10-06-2011 05:40 AM

Re: K&N's Dyno chart
 
Certainly in real world driving I have noticed no reduction in low end torque. The graph only indicates this below 1,000 rpm anyway. The slightest throttle puts you over that.

bigpanda 10-06-2011 09:24 AM

Re: K&N's Dyno chart
 
Quote:

Originally Posted by Cherodude (Post 494887)
Certainly in real world driving I have noticed no reduction in low end torque. The graph only indicates this below 1,000 rpm anyway. The slightest throttle puts you over that.

Did you have one installed for your WK2?

Cherodude 10-07-2011 05:52 PM

Re: K&N's Dyno chart
 
Sorry, my experience is with the K&N drop in filter, not the CAI. My bad.


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