ZR-1 Net Registry Forums - View Single Post - Is you Knock sensor taking performance down for the count?

XfireZ51 · 05-12-2012

Paul,

We'd need to determine if the EST module in the ZR is specific to the motor(which I suspect due to the completely different motor architecture)
or it works w another KS. Perhaps Marc H. or Jerry could shed some light on that. The knock strategy in the stock calibration is pretty aggressive and clearly designed for better safe than sorry. Knock parameters deal w amount of retard,
Duration and decay rates. These can be reduced typically. If you've data logged a dyno tuning session, you'll see that the LT-5 isn't prone to knock at the top end. Knock shows up right around torque peak, between 4-5500 rpm. In my last tuning session I had 34d for top end advance w no knock. However, power was down. So no sense in keeping it there.
Proper installation of the KS is important(ie overtightening) to avoid false knock.

05-12-2012	#7
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: Is you Knock sensor taking performance down for the count? Paul, We'd need to determine if the EST module in the ZR is specific to the motor(which I suspect due to the completely different motor architecture) or it works w another KS. Perhaps Marc H. or Jerry could shed some light on that. The knock strategy in the stock calibration is pretty aggressive and clearly designed for better safe than sorry. Knock parameters deal w amount of retard, Duration and decay rates. These can be reduced typically. If you've data logged a dyno tuning session, you'll see that the LT-5 isn't prone to knock at the top end. Knock shows up right around torque peak, between 4-5500 rpm. In my last tuning session I had 34d for top end advance w no knock. However, power was down. So no sense in keeping it there. Proper installation of the KS is important(ie overtightening) to avoid false knock.