Porting BB heads

The MP engine manual doesn't even say anything about a 3 angle valve job. All it says to do is just knock that one corner off the back side of the valve. Not that the multi angle valve jobs don't have their place. In most instances though, 3 or more angles on the valve faces and seats will only net results above 5500 RPM. Most street engines are operated well below that over 90% of the time. Sinister, you did say you could do the 3 angle yourself.......I would do that as well if I had the equipment. It certainly won't hurt a thing.

I correct myself.....the MP manual does discuss multi angle valve jobs but in more of a "race only" type discussion.