Re: 3 angle valve grinding??

Posted by buickanddeere on November 13, 2004 at 04:03:04 from (192.75.48.150):

In Reply to: 3 angle valve grinding?? posted by Lynn Kasdorf on November 12, 2004 at 13:03:22:

The gradual angle before and after the valve sealing area reduces turbulance so flow is increased.
It also helps un-shroud the valve.
A nail head shaped intake valve takes up less room in the flow path vs; a tulip shaped valve. Matching the manifolds to ports reduces restriction and turbulance. So does grinding off rough casting flash and sharp/abrupt machined edges around the valve guides.
All this adds a little more "free" HP even in the most modest of engines. No rebuild should ever be done without doing a fresh re-grind on the cam to true it and the lifters up as well. A wee bit of a custom cam grind can really wake up some engines.
As previously stated the old suction cup and lapping compound is only a trouble shooting tool. Square true seats/valves cannot be made with lapping compound.

Follow Ups:

Post a Followup Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]