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."
Good choice on the engine !!
Just beware the CAR number (comp. ratio if Im not wrong) is quite big for that engine.
This is my experience on last race, using RR12L3 and byron 16%
(ambient temp is about 32-33 C, track temp almost 65C, humid is very high)
Since this is a new engine for me ,im having a trouble to tune it right on 3x heat.
On the final I decide to reduce the head shim to .25 mm (stock is .3mm) and it blast everything in front of it.
So if I were you, and had to use 40% nitro... I will put .5 shim first and then reducing it by .05 mm
Just my 2cents
(Guys..pls explain to me what this 2 cents means? I keep seeing it and I thought it very cool so I keep writing it..)