Subaru Enthusiasts Car Club of the Sierras - View Single Post - Exhaust cut-out & more on the road tuning.

Dean · 2005-08-12, 12:15 PM

I think the detonation on the Cobb forums is from people using maps that are not approriate to their mods, or have gone crazy with Street Tuner....

If I understand correctly, I think if the ECU can't stop the knock by grabbing timing, it should go into limp home mode, but I can't confirm this, and don't want to try.

In a modern knock sensor ECU car, I'd be surprised if you could ever hear the knock before the ECU takes it away. If you do, your tune is so far bad, the ECU can't compensate.

2005-08-12, 12:15 PM	#65
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	I think the detonation on the Cobb forums is from people using maps that are not approriate to their mods, or have gone crazy with Street Tuner.... If I understand correctly, I think if the ECU can't stop the knock by grabbing timing, it should go into limp home mode, but I can't confirm this, and don't want to try. In a modern knock sensor ECU car, I'd be surprised if you could ever hear the knock before the ECU takes it away. If you do, your tune is so far bad, the ECU can't compensate. __________________ I am a Commodore PET --- Now get off my lawn you kids...