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

Shop Now

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

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

Tractor Pulling Discussion Forum

How much stroke for John Deere G ?

Welcome Guest, Log in or Register
Author 
JD720

11-19-2003 16:14:52




Report to Moderator

Just how much can you stroke a G before you get into too many problems.I dont mind cutting the back out of the crankcase and grinding notches in the cam but I just dont want to have to move the cam or anything like that.What is the best way to cut the back out of the crankcase ? Thank you




[Log in to Reply]   [No Email]
Jeremy Brault

11-20-2003 06:34:35




Report to Moderator
 Re: How much stroke for John Deere G ? in reply to JD720, 11-19-2003 16:14:52  
I went 9" in my 42 A JD. it was very tight. we had to grind the cam to make it fit. then the cam broke, so i have to start over again. I had it ground perfectly round, bad idea. The best way to cut the back of the crankcase out is to use a cut off wheel on a 4/1/2" die grinder. that worked good for us on the A. Jeremy



[Log in to Reply]  [No Email]
1950JDG

11-20-2003 06:25:24




Report to Moderator
 Re: How much stroke for John Deere G ? in reply to JD720, 11-19-2003 16:14:52  
Hey 720;
My Dad and I have a 9.250" crank in our '47 G, and it is only bored .125" over witha few other gadgets, and it pulls great. To cut the back of the case, RENT A PLASMA CUTTER for a few days, as I have cut a few cases with the die grinder, and unless you have a sadistic side and want to empty the transmission to clean all of the gears and bearings, the plasma cutter is the only way to go, as it cuts so clean. Tyler hit it right on the head, you are not really gaining anything going much bigger. As for the rods, go with the back half of a 4020 gas rod, and the front half of an "A" rod, but try to keep the compression below 10:1 or as it has been stated many times before, the lugging power of the Deere goes away. Just my .02 cents
R/
Eric

[Log in to Reply]  [No Email]
Tyler Neff

11-19-2003 19:16:38




Report to Moderator
 Re: How much stroke for John Deere G ? in reply to JD720, 11-19-2003 16:14:52  
I ran a 9.75 in a G for a year or two. I also ran a 9.25.Both of these require you to romove some of the back wall in the crankcase. I can honestly say that the horsepower between the two were about the same.They both had 6.75 bore and Jerrys heads and manifolds.I truly believe it was a waste of time putting the extra half inch of stroke in compared to the amount of HP I gained . The amount of grinding is alot different between those two strokes. I didnt think it would make that much of a difference but it does. Im running a 9.5 in my 70 gas right now and it fit just right. I guess Im trying to say 9.25 or 9.5 would be plenty. Have FUN. TYLER

[Log in to Reply]  [No Email]
JD720

11-20-2003 21:57:59




Report to Moderator
 Re: Re: How much stroke for John Deere G ? in reply to Tyler Neff, 11-19-2003 19:16:38  
Thank you all.I think I will take your advice and go with a 9 3/8 and be done with it.It sounds like that is about the best way to go.



[Log in to Reply]  [No Email]
Flogger

11-20-2003 04:47:49




Report to Moderator
 Re: Re: How much stroke for John Deere G ? in reply to Tyler Neff, 11-19-2003 19:16:38  
Do you have to do anything special to the block to run a 6.75 bore?



[Log in to Reply]  [No Email]
like Tyler said...

11-19-2003 20:15:26




Report to Moderator
 Re: Re: How much stroke for John Deere G ? in reply to Tyler Neff, 11-19-2003 19:16:38  
I would stick in the mid to low 9's. 9.375 seems to be a popular stroke in the G's right now, so I'd aim for that area. It's reliable too.



[Log in to Reply]  [No Email]
crkw2 pulling team

07-19-2005 21:31:22




Report to Moderator
 Re: Re: Re: How much stroke for John Deere G ? in reply to like Tyler said..., 11-19-2003 20:15:26  
idd like to say that i know where there is one thats 10" one and 2 that are 9.75 and they are still goin fine.



[Log in to Reply]  [No Email]
buickanddeere

11-19-2003 20:04:28




Report to Moderator
 Re: Re: How much stroke for John Deere G ? in reply to Tyler Neff, 11-19-2003 19:16:38  
Which rods are/were the tractors using?



[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