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#1
03-23-2007, 12:35 PM
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KR woes....help please
well i finally bought a scanner(LS1m), and i have been scanning alot. well at WOT the kr spikes up to about 3.8* then goes right back down. but last night i scanned a 60-115mph run, and once i hit like 90 the kr help steady b/t 3*-5*. any ideas to get rid of this farely inexpensively? thank you.
mods: -slp headers -zzp pcm -3.4 pulley -FWI -ubend delete -flowmasters
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2001 Grand Prix GTP(daily driver) -cold air intake -slp headers -u-bend delete -reprogrammed pcm -autolite 104's -3.4 ZZP 1988 Chevrolet S10<--4-SALE PM me> -H.O. 305 -crane cam(272 dur. .454 lift) -570 street avenger -th350 with shift kit and hurst floor shifter -edelbrock performer rpm intake -double roller timing chain -hedman headers -true dual 2.25" with dynomax mufflers 15.1 @ 98 mph  <-- lol i need traction(factory one wheeler peeler)
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#2
03-23-2007, 12:39 PM
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Re: KR woes....help please
oh i also have autolite 104's and a 180 stat, thanks again.
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2001 Grand Prix GTP(daily driver) -cold air intake -slp headers -u-bend delete -reprogrammed pcm -autolite 104's -3.4 ZZP 1988 Chevrolet S10<--4-SALE PM me> -H.O. 305 -crane cam(272 dur. .454 lift) -570 street avenger -th350 with shift kit and hurst floor shifter -edelbrock performer rpm intake -double roller timing chain -hedman headers -true dual 2.25" with dynomax mufflers 15.1 @ 98 mph <-- lol i need traction(factory one wheeler peeler)
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#3
03-25-2007, 01:19 AM
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Re: KR woes....help please
Inexpensively? Probably not. What brand gas are you running? Spark plugs seem cold enough. And are you sure it is not false knock?
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'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8 '02 Oldsmobile Alero GL2 - LA1 3400 V6 '99 Buick Regal LS - L36 Series II 3800 V6 '03 Honda CR250R MX - 2 Stroke 250cc '97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold) Timeslip 08/12/06 AF Community Guidelines
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#4
03-25-2007, 07:03 PM
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Re: KR woes....help please
Judging by the mods in your sig, you should be seeing no KR. Headers help greatly, most of the time they will reduce it fully. To accurately see how much KR you are getting, you need to do a WOT run from a dead stop. If you go from a roll, torque management will give you false readings. If you still have stock gearing, at 90mph, the car will be just about to shift into 3rd, and will be at about 5500-6000rpm. You need to find out if the KR is occuring at higher rpms, or right at the shift point. If the KR occurs right at the shift, chances are it is also torque management. Torque management is the PCMs way of protecting the tranny. It will retard the timing at shift points a few degrees to help the transmission from going out early. So, if the knock you are seeing is at, or right before the shift, and it is only a spike for a quick second, it is torque management, and there is nothing you can do about it unless you have a Powertuner and feel like tuning it out. I know ZZP rewrites the TM tables, but they don't get rid of it fully. If the knock isn't spiking and is there at the higher rpms, then it is actual knock and more supporting mods like rockers or a cam or an intercooler are the only way to kill it.
You can test for TM by adding race fuel (110 octane) and running the car WOT from a stop. If you see the same spike of KR, it is TM. Good Luck.
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#5
03-26-2007, 12:32 PM
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Re: KR woes....help please
well i run 94 octane when i can get to sunoco, but otherwise i go to bp or shell only and get 93. how can i find out if its false knock?
__________________
2001 Grand Prix GTP(daily driver) -cold air intake -slp headers -u-bend delete -reprogrammed pcm -autolite 104's -3.4 ZZP 1988 Chevrolet S10<--4-SALE PM me> -H.O. 305 -crane cam(272 dur. .454 lift) -570 street avenger -th350 with shift kit and hurst floor shifter -edelbrock performer rpm intake -double roller timing chain -hedman headers -true dual 2.25" with dynomax mufflers 15.1 @ 98 mph <-- lol i need traction(factory one wheeler peeler)
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