James & Son
Veteran Member
I posted this in the A5 thread and thought you guys may have may have not considered this. I was responding to a cam replacement( BRM or BEW) reduced mileage question.
Worth checking injector clearance setting. If you use Franko6 method there are no special tools needed.
Way back now in 2009 I had my cam replaced under warranty. For some reason i checked them in 2012 and instead of the 1/4 turn I only had 1/8 turn. I am sure now that the mechanic didn't bother checking the injector clearance to the new cam.
I have always wondered if I didn't get better fuel mileage at 1/8 turn though? I wonder if on the fuel mileage thread if they have not tried it? The concern I would have is what grows faster the injector or the cam tower? From my experience it would seem you can run it slightly tighter than 1/4 and possibly as tight as 1/8. What would happen if the clearance closed up??????