Re: F-20 Engine Assy with Pictures!!

Posted by the Unforgiven on March 13, 2007 at 13:35:04 from (66.146.249.116):

In Reply to: F-20 Engine Assy with Pictures!! posted by SproutW on March 13, 2007 at 07:09:33:

Okay, here goes. The pressure of compression and combustion is equal everywhere ABOVE the top ring. That high crown on Sprout's pistons do nothing to make a seal in the head, nor do they seal ANYTHING while it is still in the cylinder, that is the primary job the top ring. Since the top of the piston is smaller than the cylinder, the gasket does not care where the top of the piston is, because the sealing ring is still below it. The high crown only occupies more space in the combustion chamber than a lower crown, less open space at TDC means a higher compression ratio and more power. I think you could set the rocker gear on and push the rocker down with the heel of your hand and get a good idea of how much valve travel you have available at TDC. I would bet that your spring will be coil bound before you hit the piston, or at least very close. If someone showed me that picture of most any engine, I would say that it almost certainly would not work. But the 20 does have a huge true open chamber, and I have used these pistons myself. Is that a narrow tread?

Replies:

• Re: F-20 Engine Assy with Pictures!! SproutW 17:00:52 03/13/07 (0)

Add a Reply 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 ]