Apexi SAFC2 Knock Sensor

[got2b240]

I own one of these and my knock starts out cold as 25-30, then after driving or even warmed up well for 1/2 hour the knock displays over 50 to about 75. Is this normal? I am just curious, also when I checked my ecu last time the knock sensor code was thrown. I reset and drove for a month till now. Any opinions?

[got2b240]

Bump for some help?

[mynismo]

don't worry there's nothing wrong with your car. the knock feature on the safc is a joke. there's phantom knock all over the place. i wouldn't pay too much attention to it.

my raw knock data on both of my cars was above 150. i don't think apex knows how to tap into the knock sensor or not...

[kota2240]

Hey chris when is the bracket coming in? You still have not sent you car pics to me, lazy ***

[SRdave240]

don't worry there's nothing wrong with your car. the knock feature on the safc is a joke. there's phantom knock all over the place. i wouldn't pay too much attention to it.

my raw knock data on both of my cars was above 150. i don't think apex knows how to tap into the knock sensor or not...

Actually it works great, Apexi just does a crappy job of relaying info to you about the readout scale. My personal opinion is b/c they don't want to be liable by telling you your engine is same at certain knock levels.

1. Make sure you have no exhaust leaks or other noises that can throw out some false noise readings. Remember the knock sensor is basically a microphone2. Calibrate it! Follow their procedures on a warm engine on a day of average temp (not too hot or cold)3. Understand that some backgrond noise is normal. My calibrated knock sensor readout will get as high as 40 or so just idling on a hot day.4. Audible knock is heard around 175-200. I learned this the hard way - no damage done thoguh. My peak knock was 230!!! 5. I try to keep it tuned so that it is less than 100 under WOT and boost.

Hope this helps!!