Another cold weather tuning question.

[stealth2669]

Coming from tuning a turbo car I understand cold temps will lean out an engine but from reading several posts regarding cold weather tuning I have some unanswered questions. I heard due to the dense air mix by running richer it could actually create higher engine temps? I was recently trying to tune my 3.3, about 45 degrees, and with the high speed needle about 4.5 turns out and solid smoke off a start then diminishing a lot as I gained speed I found my engine temps as high as 260. The truck would occasionally cut out or shut off per say then come back on too. Is this because its too lean? Engine rpms would hang after I lift on the throttle even at low rpms just before idle it would hang then finally come down. Any help is appreciated, Thanks in advance! (Sorry I'm a noob)

 

[RC Addict]

260 isn't hot at all. In fact that is where you "ideally" should be. It doesn't sound too lean nor too rich. As for the "hanging" throttle, maybe try a return spring. In the cooler temps it is possible things are just hanging up on you.

I will be interested in seeing what some of the more experienced guys will have to say on this one. Bryan???

 

[stealth2669]

I'm concerned about the occasional cut out(for lack of a better term.) Occasionally when I would make a full throttle pull just as the truck would come into the power band it would just shut off then come back on and might be fine for a few more passes then suddenly again do it. When at full speed their was very little smoke but off the start their is LOTS. I thought 260 was hot for body off and ambient temp? I can't imagine how hot it would be if it was summer and 80 or is that a misperception?