Tuning Question with 33% Fuel

cobaltleo said:

so i've been trying to tune my revo latley but getting wierd results. i'm following a guide in july issue of rc car action mag. which actually helped me a lot better than the tuning guide that came with my revo (2.5r) i think I'm about at the right point on my lsn as I'm now getting good takeoff but if i go full throttle it just boggs down and in some cases stops all together. I'm pretty sure I'm running on the rich side cause I'm getting a lot of blue smoke but my temps are high when i lean the hsn 311 degrees. but still getting good smoke. i read somewhere that's its impossible to tune with 30% or higher fuel, is this true? I'm using the Byron originals premium 33% fuel (the red color one). temps say that i should be richer so I'm not sure if the problem is the fuel or if I'm missingg something else. btw it idels just fine.

Click to expand...

Snook Man said:

It’s not impossible to tune with 30% or higher. I and many others I know have run 50% in pulling trucks with big block engines and they purrrr like a big kitten. You can tune just about any nitro engine with 33% however; the tuning window gets smaller when nitro % increases and some engines will require an additional head shim with higher nitro %.

Bogging at full throttle is almost always a lean condition whether it is from an incorrectly adjusted carb or a leak in the engine, fuel or exhaust system.

Click to expand...