Posted: Sun Feb 24, 2013 2:49 pm Post subject: lowering KR
So, my mods to date are:
ZZP 3" down pipe with cat
Dynomax muffler in place of resonator
Dynomax 2 1/4 piping from Res to mufflers
Flowmaster 40 series mufflers and tips
PRJ plug wires
Autolite 605s tapped at .056
I'm still getting around 4-5* KR. Most of my KR seems to be at lower RPMs when going up a hill or something. I'm still getting a few blips here and there while acellerating usually around 1/4 throttle. I don't run the car hard. I haven't even opened it up since putting the flowmasters on yesterday. Before the downpipe I was getting around 7-8* KR, once even going above 9*.
Any chance some of this is false KR since happening in the lower RPM ranges where the engine is vibrating more? I do suspect I need motor mounts, as the engine does have some vibration to it and if I rev it in park the car moves forward just slightly.
I'm not looking to drop pulley sizes or anything. Just wanting a reliable daily driver. Is 4-5* KR acceptable? Should I have disconnected my battery for awhile after installing the new down pipe? I'm not throwing any codes yet. I'm still thinking about getting the overkill PCM though, just to help all my mods come together and let the car run more efficiently.
Will old spark plugs cause KR? These autolites have about 10k miles on them. Planned on changing them next week when I do my oil.
I finally got a chance to go WOT last night from 60 to 110. KR spiked up to about 4.7 then began dropping off before I let off the throttle.
I definitely don't want to go headers after spending the money on the down pipe. I also have emissions inspections to worry about annually, so the cat is something else I have to have. Really considering an overkill or intense pcm. I really want the overkill, but haven't made up my mind.
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