View Single Post
Old 11-20-2012, 11:49 PM   #40
Scooby Guru
Member#: 64908
Join Date: Jun 2004
Chapter/Region: Tri-State
Location: Tuning 8/9sec Subies all over
10.8 [email protected] GR+
9.1/157mph 2015 STI


Originally Posted by NSFW View Post
I'd blame that sort of thing on the tuner, not the ECU. If the tuner gives the car a tune that can run 100% ignition advance without knocking, then there will be no problem.

And if the tuner gives the car a tune that advances timing past the point of detonation, then the tuner just plain screwed up. The OEM knock control behavior has been documented well enough for long enough that there's just no excuse for a tuner to be surprised when the ECU turns the ignition advance multiplier up to 100%.

Plus you can set up the stock ECU to switch to wastegate boost if it sees non-trivial knock. It's not quite as blatant as a CEL, but it's still a pretty clear sign that it's time to stop playing and start troubleshooting.

Originally Posted by ASF Machine View Post
This isn't a metallurgy or manufacturing issue IMO.
It's in the tune, mostly.


Stock ecu/cobb is more than capable of controlling these cars. The knock system works great.

ECU doesn't crack the liner, user error cracks the liner
* Registered users of the site do not see these ads.
Junior2JZ is offline   Reply With Quote