I just got my plog in an still see a peak of 6*kr and 2-3* at part throttle, and its about 89 out right now at 7pm what could i do to lessen this i have a 3.6 i wanna install but would rather fix my kr first. i have 605's in could i do 104s without the pulley? or give me some ideas.. Once i save up im gonna do water/meth but it not in the budget yet

MODS:::: PLOG & rear pem, 3in dp highflow cat, 3in catback, a k&n cai and 605's

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04 Comp G... ON METH 3.5-3.6, Headers, intake, Overkill/street tune, gxp brakes, and every suspension do-dad lol
OLD PB 1/4mile in 14.07 at 98mph!! 2.0 60ft

Sounds like you are in need of a tune

sent from my driod x, via my fingers through tapatalk

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2001 white gt coupe with enough crap to make it run mid 13's with 3 bad pistons
2002 40th GTP sedan mostly stock

does it still have the KR with the S/C belt off

easiest way to find out if it's false KR beofre you start trying to diagnose it

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92 LeBaron Convert: Turbo 3L 97 Grand Prix GT 4dr "Frankenstein": L67 4t65 swap
97 Grand Marquis: Summer DD 99 Grand Prix GTP: Top Swap Beater

If you plan on going far enough into modding which includes adding methanol injection down the road, you should have just gotten headers in the first place.

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'04 GP CompG - 2.6" junk

Are you getting KR at FULL throttle or just PART throttle? Part throttle KR is a common problem with 04+ models. No one has really been able to sucessfully get rid of it. The torque convertor doesn't unlock fast enough when you make slight excelleration changes which causes the car to bog and create KR. Many people on the DHP forum have tried to tune it out, but what worked for some didn't have any affect for others. I even tried changing the TQ settings but all that did was screw up my gas mileage and the KR was still there. The only way I'm am able to avoid it is to lift off the throttle for a second and then punch it. Plogs, injectors and all the other mods will reduce full throttle KR which is most important. However, those mods have no affect on part throttle KR. I'll see 7-8*KR at part throttle with my mods, but 0*KR at full throttle.

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3.5" MPS, 1.84 Rockers, 3" DP, Frt PEM, 39lb Injs., PowrTuner, Wizair
14.07@ 98.85mph 2.180 60'

At wot the KR will be around 2*to 4* an will jump to 5-6 at shift points ill try an get a video of my scan gauge since Idk how to get scan online..

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04 Comp G... ON METH 3.5-3.6, Headers, intake, Overkill/street tune, gxp brakes, and every suspension do-dad lol
OLD PB 1/4mile in 14.07 at 98mph!! 2.0 60ft

WOW! A post finally showing similar symptoms to what is going on with my car! At around 1-2k RPM when I first start the car get around 6-7* of knock that spike (sometimes up to max amount of KR on guage), but eventually all goes away. When I WOT once car is warmed up I get 0* KR. I had the car tuned and we could not figure out what that was. It would happen to same even from 3.8" pulley to 3.6" pulley and with downpipe on car, same thing would happen.

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Yep, from stock to the way it sits now (minus the freshly blown transmission) the part throttle KR has never changed. Also, every so often I get a bad start cycle. Most of the time I have no KR, but every so many start cycles, I get tons of KR for no particular reason. Then after a couple of times of stopping and restarting the car, it will be clear again.

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3.5" MPS, 1.84 Rockers, 3" DP, Frt PEM, 39lb Injs., PowrTuner, Wizair
14.07@ 98.85mph 2.180 60'

Same thing im going through. I can see up to 15* some start ups when I leave it sit. Other times it is 1-2* or 0*. It's pretty stupid, but I just wait for it to clear before I try to launch, because if I do the PCM pulls so much back and takes enough ponies away that you can feel the life sucked out of it.
I tested the SC belt, was getting same part throttle knock as before. At WOT in 50 degree weather with the 3.6 it gets 0* KR and getting about 10 PSI. Screams and pulls hard but can't get rid of part throttle KR.

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Im guessin ill try taking the supercharger belt off, an am i looking for no kr? cause if i do then what?

An i havnt changed my pcv in ah while either, try that an new plugs? at what gap on 605's?

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04 Comp G... ON METH 3.5-3.6, Headers, intake, Overkill/street tune, gxp brakes, and every suspension do-dad lol
OLD PB 1/4mile in 14.07 at 98mph!! 2.0 60ft

Try running 104 copper cores at like .060 gap, maybe that will get rid of some of this knock you are seeing. You are probably better off selling your PEM's and going with speed daddy headers or a nice pair of headers, you will lose a lot of KR. I saw high spikes at WOT when I ran a 3" downpipe (on stock manis) but I know that PEM's arnt that much improvement for supercharged set ups.

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I have a plog as well.. but i may try the 104 here soon. i need to do some front end maintenance as well got bad wheel bearings, tie rods have ah lil slop an might as well do control arm bushing an maybe ball joints, with engine & tranny spacers

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04 Comp G... ON METH 3.5-3.6, Headers, intake, Overkill/street tune, gxp brakes, and every suspension do-dad lol
OLD PB 1/4mile in 14.07 at 98mph!! 2.0 60ft

I really think the 104's will help ya. Are you also running a 180 tstat and tuned for it?


Something to think about is, your motor isn't able to breathe very well with the plog and downpipe, it still is restricted (even with the plog) in the front manifolds. If you really wanna stand a chance of not seeing knock with the 3.6 get headers and do your wallet and your car a favor. Even with a tune, and 104 plugs, 180 tstat and all your mods I was seeing 3-4* KR at WOT with a 3.6.

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If you use the 104's, gap theam at .052-.055. Make sure the gap is consistent!

-- 02 Jun 2011, 11:30 --

If you use the 104's, gap theam at .052-.055. Make sure the gap is consistent!

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One Big Ass Mistake America