ORIGINAL: ericheller
how hot is it geting and what engine do you have? you could go to maybe 20% nitro, that should cool it down a little and give you more horse power.
If he is in Saudi Arabia, he cannot get 20% - the highest allowed by law is 16%.
It might just be damn hot there too, lol. I would richen the HSN a good 1.4 turn and see what happens. Which truck is this, and did you properly break it in? An engine that wasnt broken in will produce the exact symptoms you mention.