Originally posted by rodrigo1508
Well since no one answers my question in the engine forum although it has 53 views I will ask you guys.
"I normally use 30% from powermaster because thats what my LHS carries but now they got some 40% odonnel and I already bought it so what can I expect from going from 30% to 40%. Also how good is this engine I am planning on using it in my new NRS-RR12L5. Or should I stick with the 30% I havent opened it yet so I can always change it."
I would say stick with 30%. No reason to go with 40% nitro. More wear and tear. Of course the car goes faster when tuned right.
With 40%, you need to add 0.1 mm copper shim to the stock 0.3 mm silver aluminum shim.
I can't remember but I read an article of XTreme RC magazine and they were comparing low and high nitro content fuel in terms of laptimes and their engine temperatures. One is when tuned properly and the other is when you do not. I'll dig it out and see.