Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Discussion Forum
Order Ford 8N Parts Online

Big Bore 8N

Welcome Guest, Log in or Register
Author 
Ron Landrum

11-02-2000 10:14:01




Report to Moderator

Can someone tell me of any experience they have had honing the block and installing pistons to fit the block after removing the thin wall sleeves. What about power and reliability?

Thanks
Ron L




[Log in to Reply]   [No Email]
JHEnt

11-05-2000 16:13:42




Report to Moderator
 Re: Big Bore 8N in reply to Ron Landrum, 11-02-2000 10:14:01  
Years ago Ford offered .090 oversized pistons to put dirrectly into the bore of the engine as a cheaper overhaul. Today these engines are deeply cut into by the piston as the cast iron used in the engine block was a soft iron. To repair one of these tractors correctly today involves sending the block to a machine shop and getting it bored and custom made sleeves installed. This is very expensive. Since the N series engine does require overhauls fairly often compared to the later overheadvalve engines you could be looking at spending alot of money every few years just for trying to get a HP boost now.

[Log in to Reply]  [No Email]
bg

11-02-2000 13:12:51




Report to Moderator
 Re: Big Bore 8N in reply to Ron Landrum, 11-02-2000 10:14:01  
I agree with Dave. If you bore the block and run oversize pistons in the bare block, you can't rebuild it but once maybe. If you install the cast-iron sleeves you will be able to rebuild many times. The cast iron sleeves also seat the rings better and help in even heat transfer. The horsepower increase you might get is negligible, especially compared to loss of overall durability and longevity of the engine.

[Log in to Reply]  [No Email]
Dave Todd

11-02-2000 11:53:35




Report to Moderator
 Re: Big Bore 8N in reply to Ron Landrum, 11-02-2000 10:14:01  
Ron, Why not bore the block and install the thick sleeves. That way you don't wear out the block, and it's still good for later rebuilds. If you want more power, I think you can bore the thick sleeves and put oversize pistons in, without ruining the block. Just my opinion.
Dave



[Log in to Reply]  [No Email]
Tom VB

11-02-2000 14:53:06




Report to Moderator
 Re: Re: Big Bore 8N in reply to Dave Todd, 11-02-2000 11:53:35  
Dave you're correct. I have a 1950 8N which has had the 90 sleeves removed and larger pistons installed. I haven't decided what I'll do when I put it back together. My dad and many of the old hot rodders use to remove the sleeves and bore 100 ths. over then install Mercury pistons and therefore boost the power up. I've seen 100 thousands over sleeves also available.



[Log in to Reply]  [No Email]
JimTN

11-03-2000 03:31:15




Report to Moderator
 Re: Re: Re: Big Bore 8N in reply to Tom VB, 11-02-2000 14:53:06  
Mercury pistons would be no different than Ford when it comes to oversize, both were same bore as the 8N to begin with, 3 3/16". Difference in Mercury piston is stroke, they had a 4" stroke so if you put a 3 3/16" Mercury piston or larger in your 8n it would not come to the top of the bore, would be shy of the top.



[Log in to Reply]  [No Email]
Dave Todd

11-02-2000 19:54:17




Report to Moderator
 Re: Re: Re: Big Bore 8N in reply to Tom VB, 11-02-2000 14:53:06  
Tom, I would imagine there is a aleeve for just about every size hole. You might be able to find a sleeve to fit the hole and still use close to stock pistons. ??? The blocks are getting harder to find in good shape, so might as well try and save it if you can. At least you have one that can be fixed and used....I hope. Good luck!!
Dave



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


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 ]

Home  |  Forums


Copyright © 1997-2023 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