K&N Drop-In = Performance Loss?

[rottone]

Recently I replaced my spark plugs and air filter at the same time with NGKs and a K&N drop-in. After, the performance was off - the engine hesitated and lugged, downshifting too late and upshifting too early. I thought it was the spark plugs so I re-gapped them. This helped, but not completely. So I put the stock air filter back in and the performance was restored. Does this make sense to anybody? Maybe these changes require the computer to be reset by disconnecting the battery? I would appreciate any advice / experience you can share regarding this.

[ptTurbo528]

i dont think i should make a diff...is the filter still in the car? if not reinsall and take the car out for a so called spirtied drive the computer may have to make some adjustments to compensate for the extra air intake...i put a short ram typhoon intake made by k+n and noticed a hell of a diff in performance... are plug wires new,old or orignal that maybe a possibility also. good luck keep me posted brian.

[Mean Green]

A drop in shouldn't hamper performance. I've never had that problem with any of the three PT's or my SRT-4.

A drop in is worth 2-3 hp and no loss of torque. An intake is worth 2-3 hp and loss of some torque. Seen it on the dyno. Sorry, you can't even feel a 2-3 hp gain. You'll notice the loss of torque at the track, though.

[rszappa1]

O I bet that someone on this forum can feel it....[]

[bobs turbo pt]

that is really strange !!

[Mean Green]

quote:Originally posted by rszappa1

O I bet that someone on this forum can feel it....[]

It's all felt in the mind. Have seen two different dyno's and open intakes suck. They do look cool though even though they rob performance. I guess if a person is not into performance and into it just for looks it would work for that person. I know with the AGP turbo upgrade you have to use an open intake because of the setup but in that case you are running such higher hp it won't matter if you lose some performance because of the open intake.

[sca037]

Did you take the K&N out of its plastic wrap before installation? [}] (J/K- I hope ;^)
They should be the same in the worst case, and more likely a new K&N would outperform a used stock filter element.
Our '03 GT is happiest with its copper Champions gapped at .038-.040", FWIW.

Brian

[rszappa1]

In the mind...you got that right....Just like the Iridium plugs...man i feel the difference...sure you do.....

[Mean Green]

quote:Originally posted by rszappa1

In the mind...you got that right....Just like the Iridium plugs...man i feel the difference...sure you do.....

Don't you just love butt dyno's?

[Wicked_PT]

quote:Originally posted by rottone

Recently I replaced my spark plugs and air filter at the same time with NGKs and a K&N drop-in. After, the performance was off - the engine hesitated and lugged, downshifting too late and upshifting too early. I thought it was the spark plugs so I re-gapped them. This helped, but not completely. So I put the stock air filter back in and the performance was restored. Does this make sense to anybody? Maybe these changes require the computer to be reset by disconnecting the battery? I would appreciate any advice / experience you can share regarding this.

I would disconnect the negative battery cable, wait a few minutes and then re-install it. Hoepfully it will cause your car to re-map the new air to fuel ratio. The K&N should be better than the stock filter.