MoTeC Global Forum

Is there any point in wiring up the stock pair of knock sensors to my M800 ECU on a race Nissan RB26 engine? I believe the current software will not allow timing or other parameters to be ALTERED by knock readings, but will only log readings, am I correct? Will the logging work from the stock sensors, or do I need to buy specific ones? is it worth bothering.... ?

Thanks, great forum!

Hi Chris,
Knock sensors by them selves put out very little voltage and need to be amplified. We are currently working on a knock solution but have to be careful how we release it to the unsuspecting public.

I am not sure it would be that worthwhile to log the raw voltage value from the knock sensor because detonation is more about frequency (many 1000's of cycles per second) rather than overall voltage. You really need a dedicated signal conditioner to make proper use.

OK, I'll leave this out of the loom for now, thanks. Any opinions on a product called "Knock Box", a standalone knock monitor, which I think hails form Oz, too? More for initial reassurance during and soon after mapping, rather than long term usage. The possibility of using it on other engines appeals.

Better stay away from that OZ product.
It's not very useful.
Motec's SKM is far better. Dealer installation is a must though.