and thats the trouble with mfi. its so old 9 out of 10 the fuelling goes out of sync on a weekly basis. efi is the way forward, my next job. i guess im lucky in that mine is in good nick up to now.

re the turbo, are you 100% it runs at 8psi? sounds like a low boost pressure to cause excess heat like that. what spec is your turbo and where did you get it from?

i ask about rain as moisture can enter the dizzy and cause loud backfires at full load.