yeah there right heat can be a problem... that's why I run paddel's it pushes the truck foward alot faster and keep's it cooller.I just don't stand on the throttel for verry long and my temp stay's around 240f the 18tm seam's to take the heat realy well.I also run sidewinder 20% it has after run oil in the mix with LC3 hot glow plug so I can run richer for cooling seam's to help