nitro rejet chart

[morris]

i had a hard time trying to figure out where to put it, so hope this is right place, if not go ahead and move it. my friend has a door slamer drag race car. uses methanol. but is wanting to turn the wick up a little. thats right nitro. i think he couldent stand that my radio control car runs 30%. i need to find a chart that shows how much to increase fuel with a certen amount of nitro added to methanol. thanks a lot

 

[morrison250r]

The max power air-fuel ratio for methanol is 6:1
Nitromethane is 1.7:1
6-1.7=4.3
4.3x.3(30%)=1.29
6-1.29=4.79 (new a/f ratio an increase 20%)
You may want to start with less (5 or 10%)then work up.
Optimum ingition timing will change.
Sound about right?

 

[o2man98]

Just pick up some VP M5 fuel.

 

[morrison250r]

VP M5 has no nitromethane content.