Originally Posted by
Corse-R
Adding a straight 10% of castor oil to a regular fuel is a lot of oil that will not be burnt and leave a lot of oil deposits on the engine.
The fuel I use (Runnertime) has 12% oil to start with, adding the 10% isn't a problem at all
This is a very bad advice, with such rich adjustment of the carb, engine will not reach never their operating temp and the work done with the hairdryer will be futile.
WOT + Fourstroking create a lot of stress on the conrod and crank and is a sure recipe for a short living engine due to excessive wear on the upper side of the sleeve and the crown of the piston, just where the most pinch is.
Is better to go with a rich setting that allows the car to move but not shift (if is equipped with a 2speed trans) or do it very late, not allow to wind it and have the engine at about 90-100ºC.
Pre heating is because the engine doesn't have the continues lubrication from the fuel while starting it and you don't want it getting stuck at tdc.
The first couple of tanks aren't about heat/ engine temperatures, but about lubrication.
If you have a lot of heat in your engine and less fuel/oil chances are that the little metal particles coming from the piston/sleeve start creating scratches.
This ruins the engines performance.
Only when the engine has gone through the first part of break in and starts going faster and faster without leaning it and actually starts shifting you are creating the fit which depends on how hot the engine is.
The loads a crankshaft ( and every other part of the engine) has to endure on 40000 RPM are a lot higher as the loads seen at WOT break in.
Breaking in an engine on low temperatures for too long will ruin an engine, but at the start surely doesn't.