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

Tractor Pulling Discussion Forum

Cylinder volume in a JD G

Welcome Guest, Log in or Register
Author 
Geewhiz

09-02-2004 09:29:43




Report to Moderator

What is or where can I find the volume in a JD "G" cylinder so I can figure compression ratio's.
1950 JD "G" stock equipment.




[Log in to Reply]   [No Email]
JDGnut

09-02-2004 11:13:21




Report to Moderator
 Re: Cylinder volume in a JD G in reply to Geewhiz, 09-02-2004 09:29:43  
The volume of the cylinder isn't the problem.. Its getting the volume of the head.. Usually about 300cc in a stock styled G that has not been milled.. the other problem is figuring the volume for the top of the piston if the piston is not flat.. (they can be CC'ed.. but I've never done one in a tractor..) I flip the crankcase up so the cylinders are point up..
Good Luck
JDGnut



[Log in to Reply]  [No Email]
Geewhiz

09-02-2004 12:26:39




Report to Moderator
 Re: Cylinder volume in a JD G in reply to JDGnut, 09-02-2004 11:13:21  
What is the volume of the cylinder? Thanks for the 300cc number,for the head? I'll use it in my clculations. I am doing rough math before I disassemble the engine. Do you have these other numbers I can work with?



[Log in to Reply]  [No Email]
JDGnut

09-02-2004 14:00:36




Report to Moderator
 Re: Cylinder volume in a JD G in reply to Geewhiz, 09-02-2004 12:26:39  
No I don't have the other numbers... because this will be different with each piston and if the block has ever been decked.. so it is different.. With a taller piston there will be less volume when it is at BDC.. (than a shorter piston.) The number you need is the distance from the top of the block to the top of the piston.. than you will be able to figure the volume for your bore.. Good Luck
JDGnut

[Log in to Reply]  [No Email]
fox

09-03-2004 05:30:49




Report to Moderator
 Re: Cylinder volume in a JD G in reply to JDGnut, 09-02-2004 14:00:36  
Do you know the bore and stroke? Is it stoke?

Bore x bore x .7854 x stroke = volume ( in cu in.
To convert to CC take it times 16.39.



[Log in to Reply]  [No Email]
G-MAN

09-03-2004 07:42:36




Report to Moderator
 Re: Cylinder volume in a JD G in reply to fox, 09-03-2004 05:30:49  
That formula will give you the displacement in cc"s, but to figure the compression ratio, you must know the volume of empty space above the piston at BDC compared to the volume of empty space above the piston at TDC. The only accurate way to figure that is by "cc"ing" the engine. Cubic centimeters are usually used because they"re handier to work with than fractions of cubic inches, and will provide the same ratio.

[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