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

powerblock puller

Welcome Guest, Log in or Register
Author 
Cliff D

08-06-2006 18:36:57




Report to Moderator

hello, i have a 51' jd "a" with a 6-3 power block. im 17 and have got the fever! i need more power and have herd about people boaring out powerblocks with 6" boars and punching them out .125 and putting stock 6.125 "g" pistons into these powerblocks. what other modifications would i need to do becides milling off the top of the piston because the wrist pin sits 1/8 of an inch farther forward then an "a"s pin. LOOKING FOR SOME ADVICE FROM THE EXPIERIENCED PULLER BUILD A CHAMP!!

[Log in to Reply]   [No Email]
Cliff D

08-07-2006 15:52:05




Report to Moderator
 Re: powerblock puller in reply to Cliff D, 08-06-2006 18:36:57  
SO WHAT WVERYONE IS SAYING I SHOULD INDEED STROKE MY ENGUINE(AROUND 8 1/2" - 9"), BUT KEEP THE 6" BOAR WITH HIGH COMPRESSION PISTONS. THE HEADWORK MAY NOT NECESSARLY DONE WITH MY STOCK "A" HEAD BUT A 60'S HEAD IS COMPATTEBLE AND THAT WOULD WORK AND GIVE ME MORE POWER. ANYTHING ELSE???
KEEP WRITING!! KNOWLAGE IS POWER..... WELL POWERBLOCK...
-CLIFF



[Log in to Reply]  [No Email]
jdlover

08-07-2006 09:14:09




Report to Moderator
 Re: powerblock puller in reply to Cliff D, 08-06-2006 18:36:57  
75 h.p. without stroking an A?youre nuts get into the crankcase young man and you wont be happier.



[Log in to Reply]  [No Email]
Kevin

08-07-2006 11:36:11




Report to Moderator
 Re: powerblock puller in reply to jdlover, 08-07-2006 09:14:09  
Let me clear that up, it not in an A, its with a 60 with a 6-3 power block. I am going to go for it this winter, i have been garenteed to get real close to 75 hp with no extra stroke if not right at 75 hp. I know the extra .125 of piston osnt going to be were the power comes in, its going to be the way these pistons are designed and all the head work that is going to bring in the big power. Right now my 60 is old and worn out with a 6-3 power block that is totaly stock and original never been rebuilt and it has alot of blowby and i am still seeing 55-60hp out of it. Maybe i should be keeping this set up a secret. If you want a real good set of pistons try calling Bob at Tripple G 1-888-720-0830

[Log in to Reply]  [No Email]
sorry....

08-07-2006 11:52:22




Report to Moderator
 Re: powerblock puller in reply to Kevin, 08-07-2006 11:36:11  
sorry..but you are goin to bite the bullet if you think jsut that is going to give you 75 hp. we got an A with a 6-1 powerblock and 60 head and 8" stroke and it is only seeing 72 hp..... sorry to burst ur bubble...



[Log in to Reply]  [No Email]
Kevin

08-08-2006 06:52:42




Report to Moderator
 Re: powerblock puller in reply to sorry...., 08-07-2006 11:52:22  
Im not going to sit here and argue about the situation. You could posibly be right. I will let you all know when i get it on the dyno after we build it, thats the only sure way to find out.



[Log in to Reply]  [No Email]
deere puller man

08-07-2006 14:40:19




Report to Moderator
 Re: powerblock puller in reply to sorry...., 08-07-2006 11:52:22  
high compression and big time head work may give you the horsepower but you'll sacrifice torque and the tractor won't lug near as well. Look at it like this: Say you've got two engines from the same model tractor. Both have 75 horsepower, but one has been stroked to get the 75 and the other has done it through high compression and headwork. The stroked motor will consistently outpower the non-stroked motor on the track because it will have a lot more torque.

[Log in to Reply]  [No Email]
Cliff D

08-07-2006 08:52:18




Report to Moderator
 Re: powerblock puller in reply to Cliff D, 08-06-2006 18:36:57  
KEVIN and DSK,where do i order these pistons and cranks, also what type of headwork would i need to do. bigger valves and guieds....?? milling..
i appreciate the feedback! -CLIFF



[Log in to Reply]  [No Email]
DSK

08-07-2006 12:12:08




Report to Moderator
 Re: powerblock puller in reply to Cliff D, 08-07-2006 08:52:18  
There are many good crank builders throughout the country. Opinions of them will vary depending on each individuals experience with them. It is my opinion that you should choose a builder that can put together a complete package with compatible components and stick with them. You can check with Keith Merfeld in Peosta Iowa, (563)582-8710, or Al Schooler in Princeton, Mo. (660)748-4475. At any rate, don't expect to see your crank for 90-120 days, so send it out early or get yourself another crank so you can still play with your tractor until the job is done.

[Log in to Reply]  [No Email]
DSK

08-06-2006 23:13:59




Report to Moderator
 Re: powerblock puller in reply to Cliff D, 08-06-2006 18:36:57  
The time and money it will take to go to 6.125 will not be worth the small HP gain you'll get. If you're looking for the most bang for your buck, stroking is the way to go. If you stay under 9" you should be able to use the stock Powerblock pistons. By going to an 8.5" crank in that A, you'll gain about 99 cubes, which should get you about 75 HP. By going to 6.125 bore,you will only gain 16 c.i., you might see a 5HP gain or less with the stock PB c.r. of 6.5-1.

[Log in to Reply]  [No Email]
John179

08-07-2006 09:19:39




Report to Moderator
 Re: powerblock puller in reply to DSK, 08-06-2006 23:13:59  
How can you bore out 70 power block. or whats the largest piston you have herd of going into a 70 power block



[Log in to Reply]  [No Email]
DSK

08-07-2006 11:44:47




Report to Moderator
 Re: powerblock puller in reply to John179, 08-07-2006 09:19:39  
If you want to save a lot of headaches and money by not resleeving, the 6.675 bore pistons from Murphy's Motor Service are a good way to go. (see website) They will build a set to your specs. This is about as far as you can go in the stock PB sleeve and maintain some durability.



[Log in to Reply]  [No Email]
Kevin

08-07-2006 06:06:14




Report to Moderator
 Re: powerblock puller in reply to DSK, 08-06-2006 23:13:59  
DSK, i know of a custom piston setup that is 6-1/8" and extensive head work that is seeing 75hp with no stroking. This is not using stock G pistons, these are custom high compresion aluminum pistons.



[Log in to Reply]  [No Email]
JDGnut

08-06-2006 19:48:06




Report to Moderator
 Re: powerblock puller in reply to Cliff D, 08-06-2006 18:36:57  
If you machine the G pistons.. you have to turn the diameter of the tops down.. not just cut the top off.. So the top of the piston enters the smaller counter bore.. Giving you more compression... Or you could go to a set of custom pistons... JDGnut



[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