Like last year, I might be taking the 5020 with the 8v-71 to a tractor pull. What is the max rpm I could semi-safely run with? I heard 4000 would be fine. It had the overhead ran a year ago and runs smooth. It has the variable speed governor and I have a book for these motors but could use some advice on adjusting the high rpm. I will have an air stop available to prevent a possible runaway.

On a side note, do these 2 cycles respond well to an addition puff of propane while pulling? It is supercharged but not turboed. It weighs about 20,500 pounds and has duals full of fluid and a cab. It pulled good in fourth last year but didn't quite have enough grunt in fifth. Thanks