getting some KR on takeoff??
Thread Starter
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
getting some KR on takeoff?? went out for a ride tonight and i noticed in the log i got some KR in forst gear when taking off, looked like the speed was spikey so i figured it has something to do with wheel spin. traction was turned off so i dont really know what the deal is with this. i got it 2 times and it was on 1st gear take off, not really even that hard, and i noticed mph fluctuating a good bit.
i dont know if this has something to do with the timing tables or not, but this is the second run after the cam and heads have been installed so im just wondering if maybe it could be VE related becuase its really rich, or if its just from the quick changes from wheel spin to hook up. dont know if i should adjust the burst knock up at all or not. what do you guys think?
i dont know if this has something to do with the timing tables or not, but this is the second run after the cam and heads have been installed so im just wondering if maybe it could be VE related becuase its really rich, or if its just from the quick changes from wheel spin to hook up. dont know if i should adjust the burst knock up at all or not. what do you guys think?
Thread Starter
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
thats what i was thinking, maybe just rapid map changes from wheel hop or somethign? how would i go about adjusting this, i have never had to deal with this
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It is pretty easy to set off the knock sensors. I wouldn't be surprised to see a hard launch do it; your motor torques over pretty hard with the initial tire hit. All kinds of stuff sets off the sensor: wheel hop, rough road, exhaust rattle, etc....
An easy way to tell if it was just an initial shock that upset the knock sensors is to log and trend it. If it just a spike which continues to 0 with a steady linear trend, then most likely it is just the launch jarring the motor.
An easy way to tell if it was just an initial shock that upset the knock sensors is to log and trend it. If it just a spike which continues to 0 with a steady linear trend, then most likely it is just the launch jarring the motor.
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