05-30-2006, 07:43 PM
I find that humidity causes more of a tuning headache than high ambient temps. Take 80% humidity with 75F temps and I have issues getting things running right. 95F and no humidity and I can run all day without shutting down or touching a needle.
Low ambient also causes tuning issues. Anything below 40F causes headaches. At least for me. I find it more difficult to tune my big blocks than my small blocks when it's cold out. More surface area to cool things off faster...
Anything between 210 and 275 and you should be safe. Some engines perform well on the cool side while others don't perform well until they hit 260. Could be the same brand/model of engine and you will still get different temps that make that engine run right.
Listening to the engine, feeling for power and looking for smoke are your best tuning tools. A temp gauge is good for break-in and periodic checks if the weather is fluctuating on you.
Low ambient also causes tuning issues. Anything below 40F causes headaches. At least for me. I find it more difficult to tune my big blocks than my small blocks when it's cold out. More surface area to cool things off faster...
Anything between 210 and 275 and you should be safe. Some engines perform well on the cool side while others don't perform well until they hit 260. Could be the same brand/model of engine and you will still get different temps that make that engine run right.
Listening to the engine, feeling for power and looking for smoke are your best tuning tools. A temp gauge is good for break-in and periodic checks if the weather is fluctuating on you.