Common sense tells me its probably the timing thats too far advanced which leads me on to my next question what should the timing be set at and whats the correct way to do it ? Being a 2.1Mv am i right to assume its fine to run it on regular 95oct gas
Some common fallacies here... Retarded timing can create higher EGTs, over-advancing can mitigate towards pinking or detonation, but highly unlikely when idling with no-load, even then, . Yes 95 Ok for an MV but octane rating won't be an issue here either
Possible reasons:
Weak mixture/retarded timing (but would have to be quite severe and you'd hear it chuffing or it would hunt)
Cam timing wrong - again unlikely
Air bubble in heads/lack of bleeding - ?
Silencer or cat blocked?
Stainless exhaust better insulator than normal steel, so retains heat more
Lack of airflow around engine -
In short, this
might be expected after
protracted idling, which is never a good thing for an engine..
Is engine new, just setup, likely to have wrong timing, lambda sensor suspect etc.
PS. For English readers: Headers = manifolds, a rather nice old word,
A cylindrical pipe fitting, having a number of lateral outlets, for connecting one pipe with several others, Mmm, well worth hanging on to
