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I am looking for some insight into how much tempature will affect a good tune. Been running a 500" BBC with 14:1 comp on a 275 tune with a big shot. 7 degrees out and 6lbs flowing on C16 with 3932 plugs. Tune up looks good and has worked well up to now. With the colder weather setting in What should I be doing to safe gaurd the motor? Been racing in 75-85 degrees and now its into the low 60's at night.
 

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Couple different ways to attack that. Personally, I jet the carb(s) up, everything else being equal. Timing and system fuel pressure can also be adjusted. If you are using stock NOS jet pattern, you are probably fat already though.
 
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