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

thinking on JD G build up

Welcome Guest, Log in or Register
Author 
north east pull

12-29-2004 12:20:24




Report to Moderator

Thinking of motor build for 1949 John Deere G I want to get to gas specks at the very least .I plan on pulling in low gear or three mph class 6500lbs class I think. I do not have a endless check book but am not on a limited budget either. I have to pull motor apart waiter in the oil. It has 65psi now and is tight .
I want go to MW type piston probable not over 90 over unless I have to clean things up. I want to have the head gone thru to make it breath .I thought I would go with Jerrys manifold ,a Crum exhaust and maybe a Roberts pulling cam and if it needed and could take more fuel I might have the big nut 51 re jetted.It has a electronic ignition as well as dry air cleaner now. I am trying to buy road wore 15/5/38 field an roads for it or will buy new 14/9/38 field and roads for it .
My question is will this work will it be in the 60 to 70 hp range and dependable solid build for this type class or should I just find the waiter leak and stay on the porch with the small dogs. As always all thought and comments well come thanks, in advance north east puller

[Log in to Reply]   [No Email]
nc jd guy

12-29-2004 19:37:51




Report to Moderator
 Re: thinking on JD G build up in reply to north east puller, 12-29-2004 12:20:24  
I think the first thing I would do is get her down 1000 pounds. Most of the guys that I have pulled against at 6500 pounds have BIG motors...



[Log in to Reply]  [No Email]
JLG

12-29-2004 13:30:57




Report to Moderator
 Re: thinking on JD G build up in reply to north east puller, 12-29-2004 12:20:24  
I put M&W's in my "G" last year. I was told they make 50-55 hp, guess it depends on the dyno. I also put on the LP manifold you mentioned, was told 2-3 more hp. I think there are two of those, one ported out big, and one regular, and unless you stroke it the standard one is fine. I cant verify all these numbers unfortunatly because I havnt had it on a dyno since I rebuilt it. I do know it definitly has more power than before. Used to run out of power in 1st gear, but now I only have trouble when I pull 7500 farm stock on tight tracks. I found a used set of hard, 14.9 tires and put them on 14" rims, and when you get the air pressure and balance right it's like the thing is on tracks, definitly have traction, at least for the power I have. I still want to put on a dry air cleaner, like you have, and I'm also thinking about Crum's 3" exhaust, and the cam, they are supposed to make a noticeble difference. But right now I'm competitive in the 6000, and 6500 stock, and it still runs on 87 octane and pulls the hay wagons in from the field, so I'm satisfied. The next step is to find a head off an unstyled G. You have to work a little to get the compression where you want it, and will probly have to run 100+ octane, but it's supposed to make 70+ hp. G's like this pull in 2nd gear when I go in 1st, but I can still sneak by them every now and then. Hope this helps, I'm curious to see what others say too.

[Log in to Reply]  [No Email]
Deere G Puller

12-29-2004 18:17:50




Report to Moderator
 Re: thinking on JD G build up in reply to JLG, 12-29-2004 13:30:57  
If you're not going to stroke it, don't bother with doing any port work to the head or carburetor. They both flow plenty for a stock motor and extra work to the head will just cause you to lose torque. I actually prefer the styled head over the flat head, just shave the styled head down to the eyebrow that is between the valves and you won't have that much less compression than an unstyled head. The styled head swirls the fuel and gives more torque than an unstyle head will. Your stock manifold or the smaller LP style is also your best bet. Jerry's big manifolds are made for huge motors that need a ton of air. Unless you're getting up to 9+ inches of stroke, you really won't see any difference. My G is about 550 cubes, 95 hp and I have the styled head, factory gas manifold, and big nut carb all with minor flow work done to them and they do fine. Stock head, manifold, & carb will flow up to nearly a 500 cube motor just fine.
The cam change isn't a bad idea...you might gain a horse or two...again, with a pretty much stock motor like you're building you're not going to notice much change with all the extra add-ons. Stock stroke, M&W pistons, & an unstyle head or shaved style head will get you 60+ horsepower. Some people may tell you 70+ but I think it's just the difference in dynos as I have seen them vary 10 horsepower on the same tractor. I would go for the used tires you're looking at.
Hope I helped!

[Log in to Reply]  [No Email]
Prairiedeere

12-29-2004 20:35:46




Report to Moderator
 Re: thinking on JD G build up in reply to Deere G Puller, 12-29-2004 18:17:50  
What do you think about a G with .125 over M&W pistons, cam work, flat head with 3angle grind port and polish gas manifold, suped up 51 carb, and staying with the stock stroke? Do you think that is not going to but much different than what you said above. That is what I had in mind doing on mine. Thanks



[Log in to Reply]  [No Email]
Deere G Puller

12-30-2004 05:01:28




Report to Moderator
 Re: thinking on JD G build up in reply to Prairiedeere, 12-29-2004 20:35:46  
I think that would be a good setup. I've pulled one with a similar setup to that. Horsepower was in the mid-60's.



[Log in to Reply]  [No Email]
big jugs

12-29-2004 18:35:30




Report to Moderator
 Re: thinking on JD G build up in reply to Deere G Puller, 12-29-2004 18:17:50  
He's right. You can't make mountains out of molehills...so to speak.



[Log in to Reply]  [No Email]
mbptractor

12-30-2004 15:38:18




Report to Moderator
 Re: thinking on JD G build up in reply to big jugs, 12-29-2004 18:35:30  
I have a 47 j.d.G that i pull. Bored .125 over with M&W Pistons. The cam has been reworked for low end torqe. Works ok in 2nd gear 6500. works real well in 1st gear in 7500.Have even pulled 8500 in 1st gear.and even placed 3rd. Nothing else done to the motor.and i am very happy with my setup. I have had it on 2 different dyno's 1 was 56 hp and the other 57 hp. the tractor also NEW 45deg 15.5 by 38"tires works well for me.

[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