Hot ESC, But Apms Are Below Rating?

[jhautz]

Last night I took out the E-revo. Running 540C 9XL, Quark Monster 125, and a 4s Lipo setup on 24/66 gearing. I was running it in a open flat short grass field.

I put the Watts Up meter in line with one of the battery packs. I was just trying to get a feel for the amp draw. I was actually surprised at how many amps it was pulling. In first gear I was pulling like 89 amps on a fast start and full throttle puch all the way to top speed. In second gear I was pulling 115 amps! I was really surprised that it would be that high. My question is, the Quark esc was getting really hot after only a couple passes on the speed run, I was not exceeding the 125A constant/300A peak rating on the esc, Why would it be getting so hot. It didn't thermal, but it felt hotter than I was comfortable with. If I kept going Im sure it would have thermaled. The motor was warm, but no where near being hot and the battery packs were both not even warm yet. Bats are rated for 96A constant, 120 peak.

It just bugs me that the ESC is rated for 125A constant, 300A peak, and my set up peaks at 115A and it gets to hot. That burns my butt!!!:mad:1 (so to speak)

So my question is: If my peak amp draw is below the constant rating of the ESC why would it be getting so hot? Would a 5s Lipo be better as far as heat on the esc?

BTW: I just bought a little duratraxx temp meter today(I'm sick of guessing).