Xcelorin overheating in Lazer ZX-5 SP

[zeno]

Hi all!

Perhaps this is best posted in the Team Losi Xcelorin-thread.
But I thought I'd give it a go here first...

I got the Team Losi Xcelorin 7500kv sensorless combo fitted in my dear Lazer ZX-5 SP.
Used the pinion provided with the kit (17t) and I can run for about 5 minutes (using 5s Intellect 4600mAh battery packs) then it quits on me and I have to wait for 20 second or some, then I can get going again only to get a couple of laps before it quits on me again. Typical overheating.
So I tried using a 16t pinion instead, its the smallest one I could find for the Lazer. I also cut up two small scoops so the ESC and motor could get some more cold air.
But I still have the same problem with overheating.
I took a closer look at the gearing chart provided with the motor. And it says "14,4". Guess I'm a bit off
But the smallest pinion gear Kyosho supply is the 16t. And I don't really want to go down in speed...

Anyone else running a similar configuration??

Also the, absolutely beautiful, body is really, really tight.
The fan sometimes scratches it.
So I got a theory here. That sometimes the body get wacked and keep the fan from rotating. So I removed the fan today and fitted it with straps on the side instead. Gonna give it another go tomorrow.
But if this doesn't do it... Any suggestions?
Did I get the wrong motor for this car?
Should I try and get an even smaller pinion and add another cell to my 5s battery packs?


Oh, forgot to mention that I've tried different timing-settings. Normal, High and now for the last run, Low.