Originally Posted by hammertime
You should always be above that on the track also, somethng I see often when dealing with carb or injection is this, people complain of there cars gaining 50-60 degrees from burnout box to the end of the track. It usually ends up they are very cold in the burnout box and they do not run the fan or water pump because they think it'll keep it cooler. To start the day out ALWAYS get it to 170-180 with the water pump on and then let it heat soak in the engine for awhile. Then go into the burnout box around 155-160 with the water pump on, you should be around 160-170 when stagging, make the run and gain 10 degrees, in the shutdown area-turn on the fan to run along with the water pump. When it gets back to the 170 range shut the fan and water pump off.
Thanks for the good advice David. It makes sense to me. I probably wasn't paying enough attention to the temps. I will now.
I talked to Ron's and they said that for each nozzle change (ie: 39 to 40) the pill should change 15 sizes (ie: 80 to 95). I never knew the correlation before. He was amazed that the best dyno runs were 41 nozzle and 88 pill and 39 nozzle and 82 pill, because they should have been 30 pill sizes apart. 39 / 82 correlated to 41 / 112.