is bypassing the knock sensor safe.
Thread Starter
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Joined: Jun 2011
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From: Va
is bypassing the knock sensor safe. im running a 93 z28 ( 93 cars have ecm ) thats getting some timing knocked off ny the knock sensor. about 5 degrees. im thinking about doing the 3.9k resistor in line to bypass it and was wondering how safe it is. i only run 93 octane and i more or less just want one or two good runs at the track. its obd1 so i cant use a lt4 km
Last edited by 93z28ltfun; Jul 30, 2011 at 07:33 AM.
Lol...
Nothing is "safe". With that attitude you should put it back to stock.
Disabling the knock hardware instead of properly tuning it and eliminating false knock is retarded.
And who said you cant use an LT4 KM on OBD I....? You can
Nothing is "safe". With that attitude you should put it back to stock.
Disabling the knock hardware instead of properly tuning it and eliminating false knock is retarded.
And who said you cant use an LT4 KM on OBD I....? You can
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Joined: Jun 2007
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From: centerville, ohio
im running a 93 z28 thats getting some timing knocked off ny the knock sensor. about 5 degrees. im thinking about doing the 3.9k resistor in line to bypass it and was wondering how safe it is. i only run 93 octane and i more or less just want one or two good runs at the track. its obd1 so i cant use a lt4 km
Thread Starter
Registered User
Joined: Jun 2011
Posts: 31
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From: Va
obd1 one uses an ecm and in which the knock module is soldered inside it. the lt4 wasnt even used in 93 in the vettes yet. there is alot of differences between 93 lt1's and 94-up. ecm, speed desity, 22lbs injectors ect. now if there is some secret that you know about them im all ears.
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I know full well the 93 PCM is different and can't use the LT4 KM, but that's not what he said.
Don't want someone reading later on thinking you can't use an LT4 KM with OBD I because you can. Just not a 93
No Im not, period. He said OBD I can't use an LT4 knock module. Which is not correct.
I know full well the 93 PCM is different and can't use the LT4 KM, but that's not what he said.
Don't want someone reading later on thinking you can't use an LT4 KM with OBD I because you can. Just not a 93
I know full well the 93 PCM is different and can't use the LT4 KM, but that's not what he said.
Don't want someone reading later on thinking you can't use an LT4 KM with OBD I because you can. Just not a 93
Thread Starter
Registered User
Joined: Jun 2011
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From: Va
ok well i guess ill give it a shot. if i does work really good maybe ill wire up a toggle switch so i can use it when driving normal and bypass it when racing. ill let you guy know what happens.
I have a 93 and desensitized it myself through the tune, and my tuner said I did it perfectly. The knock sensor still functioned, and didn't pick up false knock.
It may help on some or most, but I am living proof that not all of them get it right.
You have to gradually get more and more aggressive until you just barely remove the false knock. Too much desensitizing and your KS won't pick up REAL knock, so just like with fueling and timing a mail order tuner will be conservative.
Ohh the HORROR. I have noticed how sensitive people are to this issue. I am truly debating if the benefits of the knock sensor outweigh its annoyance.