Is it harder to tune a gt2 rtr when it is 35-40 degrees outside? My truck likes to run around 250 degrees with the shell off when I'm not pushing the engine. As soon as i start pushing the engine at all the temp creeps towards 300f really fast. My idle seems good and i have plenty of blue smoke during acceleration. when i top out the engine ( for a 2-3 seconds ) i have a thin stream of whitish smoke. Should I make the engine richer or will the engine run cooler when it warms up outside ( air is less dense so I assume it will richen all of my settings a tad ). I am currently afraid to put the shell on because the engine will get less air for cooling (yes i cut a large hole out of the windshield).

If i do richen the settings should it be the high carb setting? I richened my low setting today ( to try and cool the engine some ) and i had to back the idle off some to compensate.

On the bright side the differential i replaced last night worked great. It was a bit stiff at first ( truck didn't want to roll well ) but after running it for a minute or so it loosened up and ran great.

Thanks as always.

Richen the HSN a little 1/4 turn, thats should fix the problem. But as soon as the weather gets warmer you will need to lean it out again. But dont wait for the warmer weather to come to you if your still going to run it. Cause you will do a lot of damage to the engine....

Thanks, ill give that a try when i run it this week.