I never used to think small temperature differences made much of a difference with knock. My thinking was due to the hundreds of degrees generated by the motor, why would and extra 10 or 20 degrees make a big difference? But when my IATs and BATs are running 40 and 50 degrees (usually 30s and 40s), I notice a lot more KR at the low and mid ranges.
Yesterday I switched over to Denso 1 step colder and cleaned my MAF, and while it's too early to tell, I haven't had a single warning of KR since. Previously I would get at least one warning of KR per drive. I've got my Dashhawk setup to beep over 1.0, 2.0 and 3.0 KR.
I'm pretty sure my old plugs were one of the contributors to knock in my car. Looks pretty black and I'm not liking those pink spots. My car has done only 8200 km (still new!).
http://i29.photobucket.com/albums/c2...r/IMAG0077.jpg
http://i29.photobucket.com/albums/c2...r/IMAG0078.jpg