|
Tractor Talk Discussion Board |
Re: Re: Re: Re: Lead substitutes and old tractors?
[ Expand ] [ View Follow Ups ] [ Post Followup ] [ Return to Forum ]
Posted by Steve - IN on August 31, 2003 at 13:14:36 from (12.222.30.13):
In Reply to: Re: Re: Re: Lead substitutes and old tractors? posted by paul on August 31, 2003 at 12:30:53:
Paul is right about the valve seats.
Old tractors don't have nearly enough compression ratio to required higher octane gas (which once used lead to achieve higher octance). The only benefit to lead additives is to reduce the temperature between the valve and the valve seat to prevent "micro welding" which wears down the seat in old cast heads. As Paul says, don't spend your money on lead additives, hardened seats are a much more certain fix. One more trick to forestall the head work of installing hardened valve seats is to run a turn or two rich -- thereby lowering ignition temps at the sacrifice of a bit of performance -- to save the seats. Along with that trick you have to move up a heat range or two in plugs to avoid plug fouling. Other guys will say you get the same effect by pouring in 2 stroke oil in a 60:1 or 80:1 ratio to cool the exhaust valve to valve seat contact area, while running leaner to get a bit more performance at normal plug heat ranges. Don't know if anyone has any conclusive A/B comparison results on the above -- but you should have enough enough info to avoid wasting money on lead subs, and to give you some idea of tradeoffs involved.
Follow Ups:
Home
| Forums
| Order Support
Today's Featured Article -
Talk of the Town: Trailerin a Tractor, Chains or Straps? - by Staff. Another great discussion from the Tractor Talk Discussion Forum. The discussion started out with the following post: " I bought a trailer and plan to take my CASE VAS to some shows. I don't yet have anything to secure it to the trailer. So which is better to buy and use; the ratchet-type straps or binders and binder chains?
... [Read Article]
Latest Ad:
For sale Farmall super A tractor is complete and has just been setting for awhile,it was running when pulled out of the barn,shouldn’t take to much to get it going asking 1100.00
[More Ads]
Copyright © 1997-2026 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 HeadquartersWebsite Accessibility Policy |
|
