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

Farmall & IHC Tractors Discussion Forum
Order Farmall Cub Parts Online

Increase in cub power

Welcome Guest, Log in or Register
Author 
jdboy1

07-08-2004 19:32:49




Report to Moderator

Is it true that i can put cub 154 lowboy pistons in my 1948 cub to increase the power. If not, how can i increase the power. I am in the middle of a rebuild. Thanks




[Log in to Reply]   [No Email]
K- Mos

07-09-2004 17:22:47




Report to Moderator
 Re: Increase in cub power in reply to jdboy1, 07-08-2004 19:32:49  
The old Farmall Cubs ran at about 1700 RPM while the 154s (15HP) run at 2420 RPM. The 184s & 185s (18HP) run at 2510 RPM. There may some other differences such as carb but the most obvious is the RPM.

K-Mo



[Log in to Reply]  [No Email]
Rex

07-09-2004 07:22:47




Report to Moderator
 Re: Increase in cub power in reply to jdboy1, 07-08-2004 19:32:49  
You can use 154 pistons in a regular cub, I am going from memory here because I did it a few years back,bore your block 60 over, get the aluminum domed piston 60 over from CaseIH or Cub Cadet dealers can get them if they want to for you, have your valves reworked, get a good machine shop to do it for you, when you are working with small engines you do not want to give up any HP to valve troubles.Have your head smoothed out and get the bigger Zenith carb that went on the 185 Cub lowboys. Also if you can find the govenor for a 185 you will see a big differance( When you start with 9 and end up in the 18 range sounds close to double) I change a 1957 Cub with a middle blade dual rears and double weights she was still scratching for more

[Log in to Reply]  [No Email]
brianh

07-09-2004 06:42:10




Report to Moderator
 Re: Increase in cub power in reply to jdboy1, 07-08-2004 19:32:49  
Some time ago there was an article in Red Power about a guy that claimed he had "souped up" several Cubs. I believe the things he said he did were: 1. Bore the cylinders out to .060 over, which was the largest stock piston you could get; 2. Bored out the main jet in the carb; and 3. Bored out the passages in the intake manifold. I don't remember how much he said he got from these improvements, but it was significant. You can also get a high-altitude head for it, which would help also. I don't remember what year/serial # it took place at, but the later Cubs ran their engines faster (1800 RPM vs. 1600?) that also increased the power. Brian

[Log in to Reply]  [No Email]
Paul Campbell

07-08-2004 20:24:56




Report to Moderator
 Re: Increase in cub power in reply to jdboy1, 07-08-2004 19:32:49  
You can use the 154 pistons, but you have to check the clearance with the stock rods, they may be too long. You should see an increase in power of a couple of horse power if you also go to the larger, later carburetor for the 154. If memory serves, the 154 fielded 12 drawbar horse power and the original was around 9. The pistons will cost about $70 each plus rings and rods (if necessary). I looked at the upgrade on my rebuild, but did not actually get to the point of measuring the rod/piston combo for clearance. Original pistons are flat tops and cast iron, the 154's are round tops and aluminum. I believe that it is the round top that makes the clearance difference. In any case, the parts manuals I have seen and have call for rods with a different part number on the newer engines.

[Log in to Reply]  [No Email]
Bigdog

07-08-2004 19:49:18




Report to Moderator
 Re: Increase in cub power in reply to jdboy1, 07-08-2004 19:32:49  
It won't help a whole lot.



[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