heres my ******* heatsink/fan that i modified to fit the stampede 4wd. its also marketed as ezrun. both the ******* and ezrun can be found on ebay there the 36x55mm ones. some from hong kong and some are shipped from the us but cost a few bucks more.
did some testing of temps, useing my 9.9v lifepo and the stock 11 tooth pinion gear to make some more heat and more interesting (uselly run 9 tooth) and did an oval track in the front yard at mostly full throttle 1/3 on grass. ran stock 180 but then stopped after i relized it was that hot
integy heatsink 160
******* (this one im writing about) 140 degrees WINNER
the fan blows down i tried to turn it upside down but i went off a jump the fan hit the mounting peice and broke a few fins might try it with some spacers to see if its better.
WEAR YOUR SAFTY GLASSES i got a peice of aluminum stuck in my eye for 3 days
stock it will not fit but with a little dremeling it does.
cut 2.5mm of both sides (5mm total)
cut 11mm or 3 fins off the bottom
cut off the 7th and 8th (not including the 3 fins cut off) to acces the motor screw
cut out a little rectangle 17mm (6 fins) up and 13mm in to make room for the more wires
raptor body painted blue and black (looks real nice will post pics later)
king heads motor mount
teknos in rear with aluminum hex