(quoted from post at 18:41:04 11/13/14) Mostly because it is a straight bore, no moving the center line. I would have liked to go 4 7/8 but it would have required more issues than I wanted to deal with, including Welding up the water ports in the head so the head gasket would have a sealing area.
Don't let welding the water port be the deciding factor if you really want an optimum combination. 4 years ago, I wanted to use the Chevrolet Bowtie Vortec head for our circle track engines, raised narrow runner and better combustion chamber. But, the water port lies right beyond the combustion chamber and wouldn't let the head be angle milled (rolled over) to get the comp ratio up beyond about 11:1. So, I had the water port milled out, approx. 3/8" wide, heads sent to Indy for gas welding and we haven't had any problems. Except for some very slight porosity at the ends of the weld, there was no hardness or color variation from the original cast iron base metal. The last set probably has well over 1,500 laps, no leaks or cracks. I would imagine a pulling tractor would never see that much time, so it should work OK. The Sharpie outline on the head in the picture is the location of the original water port. Original comb chamber was 64cc now 50cc. My 2 cyl putt putt is a flat head, no welding required.(quoted from post at 18:41:04 11/13/14) Mostly because it is a straight bore, no moving the center line. I would have liked to go 4 7/8 but it would have required more issues than I wanted to deal with, including Welding up the water ports in the head so the head gasket would have a sealing area.
(quoted from post at 18:49:10 11/14/14) My sleeves have a nice counter bore on
them so they will lock everything in place
plus I made a 3/8 steel plate in place of
the tin water jacket plate. Don't think
the deck of this block will move. This
will be stronger than the smaller bore
that the walls are starting to get thin
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.
Copyright © 1997-2024 Yesterday's Tractor Co.
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy