stripping my engine down

Anonymous · Post by **Anonymous** » Wed Sep 27, 06 11:42 pm

you been round my garage today,as I have stripped my 383 this afternoon & have one ex valve the same colour as yours.Isn't that strange

Dave-R · Post by **Dave-R** » Thu Sep 28, 06 10:05 am

That is pretty normal. In fact that should all be a little like that. The ones that are black have been running too rich.

Anonymous · Post by **Anonymous** » Thu Sep 28, 06 3:42 pm

Strange that some can run richer than others,considering the air & fuel comes from a common source for all cylinders

Unless the inlet manifold is smoother on some ports than the others.

Ivor · Post by **Ivor** » Thu Sep 28, 06 4:08 pm

Check out the casting numbers on the heads to find out what you've got for a start...then you can look at a few tweaks to suit the rest of your engine set up...no good having beautifully ported big valve 906's if you are running a two barrel!

Funny that just those two inner exhaust valves seem to be running right and the ones on the outside are sooty...are you running cast iron exhaust manifolds?

Dave-R · Post by **Dave-R** » Thu Sep 28, 06 5:06 pm

BTW I was guessing you were using a flash on the camera? It makes the "buff" exhaust valves look brighter than in real life. If they are too bright in colour then the engine could be too lean. A nice tanned flesh colour is about normal on a correctly tuned engine.

Adam68 said.

Strange that some can run richer than others,considering the air & fuel comes from a common source for all cylinders

Not on a dual plain manifold it don't.

Anonymous · Post by **Anonymous** » Thu Sep 28, 06 5:24 pm

Dave,this is exactly what I had on two of the exhaust valves when I pulled the heads.The intake was a factory 383 4 barrel.Just curious as to why this would happen.