How do you know if you are getting real knock vs false knock?
04-01-2006, 01:18 PM
#6
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If you know its false knock and its isolated, I would probably take out 25% and see how it looked. If the knock was gone, I'd try 15%. Just narrow it down by trial and error.
Is it isolated or is it all over the place?
Is it isolated or is it all over the place?
04-01-2006, 02:33 PM
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Originally Posted by 98Z28CobraKiller
Thanks. So how do you know how much to turn the sensor down if it is false?
I think you may have a combination of two issues that are making it hard for you to pinpoint the true cause of the KR. The inherent false KR issue for the 98 LS1's and running stock LS1 knock sensors on a LS2 block and location.
1) The 98 LS1's seem to always have 4.0 degrees of false KR at WOT. Mine did stock and with a heads/cam setup. It took the tuner a couple of attempts to tweak it to the 1-2 degree range. But it was still always there.
2) Using stock LS1 knock sensors on a LS2 block and location. Even though the LS1 sensors work in the LS2 location, they are not designed for that specific location and so the possibility they are 100% accurate seems unlikely.
Last edited by DrkPhx; 04-01-2006 at 02:58 PM.
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04-01-2006, 04:15 PM
#10
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Weather here in MN is finally getting decent. I have already put about 800 breakin miles on my setup, but my tranny went completely dead when driving about a month ago, so I just received a brand new new Stage 4 FLT transmission. It's going in next weekend. Man, what a f-ing money pit this thing has turned into.
04-01-2006, 04:29 PM
#11
Don't I know it. When I installed my clutch I didn't get it aligned just right (i let it rest on the alignment tool when I tightened it all down) and when I tried to slip my tranny in it wouldn't go in. Ofcourse, rather than loosening the pressure plate, I just kept trying to jam in the tranny. I think that in banging the shaft against the pilot bearing (I was admittedly in a rage) I may have tampered with the plug behind the pilot bearing. To make a long story short, I have a nasty oil leak. I refuse to take it apart until I have the car tuned correctly though so, here I am.
04-01-2006, 04:40 PM
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Don't feel bad. When I first installed the trans to the engine I didn't properly seat the converter to the trans input shaft, so when I bolted the two together I unknowingly crushed the front pump. So after I rushed (haste makes waste sound familar?) to get it started it wouldn't go in any gear. So the trans had to come back out. Ugh. I just want to put some worry free miles on the damn thing.
04-01-2006, 05:20 PM
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Originally Posted by 98Z28CobraKiller
I refuse to take it apart until I have the car tuned correctly though so, here I am.
04-01-2006, 06:35 PM
#14
Originally Posted by SMOKINV8
If you get oil on that clutch you're going to be replacing more than just the rear seal.
It's already too late for that now. If that is where the oil leak is coming from, then the 1000 miles that I have put on it have already ruined the clutch and if it isn't then i don't have to worry about it. So either way, i'm not worrying about it till it's dialed in. I tend to believe that the clutch is slipping under hard acceleration in 2nd gear and up. I think that I should be blowing the tires off when I nail it in 2nd at 3500 with bald hard old crappy tires and that is not happening. I do feel hard acceleration (much harder than my 04 GTO on the bottle) though.
Now back on topic. I still have my rev limiter set to 6200 so I did some pulls up to that and I found that I had between 1-3* of KR from 5000-6200 and I believe that it should make power to like 6800 or a little more based on my setup. Should I sweat it? Should I reduce sensitivity? Is this just a fact of having 98 Knock sensors?
