Hey All, Below is a graph of my before and after measurements.

The truck only has 700 miles on it and I think it'll pick up some more power after everything seats better. My timing seems awfully low IMO... I'm not sure what it's supposed to be? (maxxing at 17.5 at 5000rpms)

Anyway, A few quick notes and another mod I believe is NEEDED to make this kit shine it's best.

1) Both pulls were made in very close density altitudes.. including ambient temps. (36F & 34F)

2) I'll be adding a outerwear prefilter very soon to extend it's cleaning intervals.

3) Engine room heat is an issue for this K&N kit!
The stock air box supplied air that was only 2-3 degrees higher than ambient at all times. Even when parked and idling.

The K&N kit does NOT do this! I had it fully warmed up and when driving 70mph it was 8-10 degrees above ambient. Park the truck and within one minute it was seeing 70 degree temps while it was still only 34F outside. This is hurting power.

During my graphed 2nd gear pulls the IAT measured temp started out at 52 and dipped to 41. As soon as I backed off at 5600rpms the temps start to climb again. Engine room heat is an issue for this kit to say the least. However it does'nt look to be any big deal to seal it off.. which I'll do here soon.

4) Noise. It's quieter than I thought it was going to be. I'm supprised at this.

5) The butt-o-meter tells me it's making a difference. Both in mid-range - top end power.. and also in tip-in while driving down the hwy. You can feel the difference, but it's not that noticable down low.

6) Peak power gains. 11hp at 5025rpms and TQ is best judged by the graph.

Note: The graph is not a perfect overlay. But it's pretty close to get a good feel for some real world "on the road" results.

Rich

 

i know i can probably guess, but which lines are whch...

 

If you look on the right side of the graph there is a legend.

Rich

 

Not too bad...11 hp with a stock truck/stock programming. Im suprised really, i was thinking more like 3-5 HP. Just too bad that TQ cant match the HP gain.

 

whoops, i didnt scroll...

 

Not too shabby

 

IMO it pretty much backs up thier claims on the K&N web site. I think with a better sealed off filter area it would see 13-14hp like they claim.

One thing to keep in mind for those of you with 5speed autos. When we go WOT the rpms stay high til we let off. This is where this kit does it's best. So.. those of you who either are 16yrs old.. or act like your 16. this is a kit you just might like.

Rich

 

wait what is you sign on name? lol

 

The plots show that the two systems have virtually identical torque from 2700~3200 RPM. If anything, the K&N is averaging slightly lower torque there than the stocker. In the same region, the K&N shows a consistent 3~5 HP gain over the stocker. This is mathematically impossible.

So, when you say that it is not a perfect overlay, does that mean that the K&N curves are shifted only to the left compared to the stocker's? Or are there errors in placement relative to both the x- and y-axes?

 

this was the whole kit, and not the drop in filter?

 

I can't make this overlay perfectly because autotap uses timestamps vs other types of data for each data point.

My best compromise is to line up rpms, avg. the two, and plot the respective points accordingly. It's the best I know how to do anyway. Besides.. this is just a reality check for a public forum.

Don't pick apart the graph too much.. it's not perfect. Rpms vary by 50-100 at each point. Also, the more data I measure at one time.. the less points in each area I can record during a log.

And yes it's true that at lower rpms the torque is nearly identical. But also keep in mind the air temp reaching the intake valve. With the K&N the air at first WOT is at least 25 degrees higher. When I seal it off better I'd expect to see a 1%-2% gain in power.

My name.. well it is true. But the days of me driving like that on the street were over long ago. Shoot, I did'nt bust 2500 rpms on the way in to work this morning.

bumpin.. this is the $300 kit #63-1108

Rich

 

My intent was not to pick it apart, just trying to make some sense of it.