HyRev 7500 ECU box
Yes, and I do not know how to explain it any better. All but the gold box retards timing at high RPM. That hasn't a thing to do with "how hot" the spark is. The reason for it is so that timing will not advance too far resulting in detonation at high RPM. But, as I said in my earlier post, if you run race gas, or have a low enough compression, the retard feature is not needed.