Keeping my motor cool advice needed

[Jamie.T]

So, first day back indoors yesterday with my 511, small tight medium grip track and i was running an LRP X12 7.5t motor.

Started out on 17t, then tried 16t and then went the other way to 18t but could not get the motor cool at all. Motor was coming off boiling hot after each run and wont last long running at those temps.

Belsten and Griff were also coming off boiling hot and was wondering how to keep it cooler. Ive ordered a heatsink and fan which should help, and drilled some extra holes in the shell, but is there anything else i could do like knock the timing back or similar, or perhaps run a 10.5t instead.

Any help appreciated, cheers.