XS HEAD WORK

Julian · New Member Joined: Jan 25, 2009 Posts: 5

Okay, this is where we are at, need someone that'll recondition the head of our 650. Don't need a hot rod but would like a little performance. I don't mind shipping it, but would like to keep it close to Texas.

TwistedLeather · Posted: June 8, 2009, 6:03 pm Post subject: Re: XS HEAD WORK

Well, I live in Fort Worth TX and I'm quite familiar with what makes these old beasties breath better. I've got the equipment but I don't have a flow bench....what I normally do is polish out the exhaust runners and just clean up the castings on the intake side. Believe it or not, it makes a huge difference. Swirl Polishing the valve heads is also something I do to help get the gasses where they belong more efficiently.

dpmphoto · Posted: June 18, 2009, 1:10 am Post subject: Re: XS HEAD WORK

How do you swirl polish the valve heads,and what does it actually do

TwistedLeather · Posted: June 18, 2009, 2:36 pm Post subject: Re: XS HEAD WORK

Swirl polishing the valves involves chucking them up in a Mill and spinning them at a slow speed while polishing the inner surfaces with a medium grit polishing drum for the intakes and a fine grit polishing drum on the exhaust. The left intake gets a counter clockwise swirl and the right gets a clockwise swirl....It may not sound like much, but it makes a noticeable difference.

Butch.

dpmphoto · Posted: June 18, 2009, 3:12 pm Post subject: Re: XS HEAD WORK

Just started tearing down another one I'll have to give it a shot

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