- Thu Feb 14, 2013 7:15 am
#1805
Hey , I dont know how normal my carbon build up is but after 1000 miles I pulled my head off for a stripped rocker stud and could not belive how filthy my combustion chamber and exhaust port was . More soot than an old coal burning fire place .
Is it the dreadful fuel that is sold in Australia at the pumps ?
I know there are strange additives in it for the lack of lead but with 9:1 comp ratio , 535 forged piston racing valves and valve springs , high lift cams and a 32 mm Amal concentric MK2 carb that is as lean as it can go with out spitting and it's been ported right out as well .
It's a kind of sticky black soot that realy does stick to the metal fast .
I know Bullets are sooty but this is crazy , does anybody else get this ?
I can stop it by running on pure Ethonal or Methonal but I will have to buy big drums of the stuff for economic reasons .
Any hepful thoughts on this subject ?
Is it the dreadful fuel that is sold in Australia at the pumps ?
I know there are strange additives in it for the lack of lead but with 9:1 comp ratio , 535 forged piston racing valves and valve springs , high lift cams and a 32 mm Amal concentric MK2 carb that is as lean as it can go with out spitting and it's been ported right out as well .
It's a kind of sticky black soot that realy does stick to the metal fast .
I know Bullets are sooty but this is crazy , does anybody else get this ?
I can stop it by running on pure Ethonal or Methonal but I will have to buy big drums of the stuff for economic reasons .
Any hepful thoughts on this subject ?
