ORIGINAL: Uberchav Alex
ORIGINAL: vti-chris
I changed from 20%nitro to 30% and didn't use the extra shim cause the engine is already with very little pinch so it's OK i beleive to use the 30% fuel.
Well there is one mistake. The shim is there for a reason. It wasn't just a freebie they threw in the box but a HINT that if you read the istructions, you'd notice they tell you to fit it for 30%. The reason: TO KEEP THE TIMING RIGHT.
Your engine IS running with advanced timing, this will start off with pitting to the hea from preignition but will result in in a conrod or crank failure should you continue. No matter how the pinch is With 30% the volume of the chamber must be increased. It'll run cooler and should be happy with a P6 where you are.
Alex, your talking rubbish as usual....
The engine is fit with one each of 0.1mm and 0.2mm
cylinder-head gasket when it leaves the factory.
Another 0.1mm head gasket is supplied with the
engine. You may add it at initial running-in, when a
glow plug tends to burn out due to high temperature
and / or high humidity or when you prefer fuel
economy to power.
The engine is fine on 30% with stock shimming...
My guess is the middle needle is out of adjustment... or there is an airleak around the carb/backplate..
