Alphabettispaghetti
Club Member
Compression alone won’t be the reason for running on, there must be other factors at play. Interesting that you both went to hotter plugs. The higher octane fuel must help lower chamber temps also?
Interesting you say BP6ES to BP6ES , I have swoped to a hotter BP7ES plug in mine because the plugs were getting to hot.
Never had a problem with mine running on, it was about 210 when we tested it on the dyno a while back and I run it on shell V power or the tesco 99 octane
Compression alone won’t be the reason for running on, there must be other factors at play. Interesting that you both went to hotter plugs. The higher octane fuel must help lower chamber temps also?
Interesting - what carbs?
Dyno guy looked at mine and said to go to 7 , my understanding from it was the hotter the combustion chamber temps i'e from high compression you use a colder plug which gets the heat away from the tip quicker to stop it burning out, that's if i understood it right,
weber 40 DCOE 151
This Thread is confirming that very high compression with SUs results in 'running on' which is what my engine builders have said.
Franky is that a Datsun?