Yesterday's Tractor Co. Parts for Farm Tractors - Compare our Prices!
Click Here or call 800-853-2651 
   Allis Chalmers Case Farmall IH Ford 9N,2N,8N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   Traditional YT Forum ViewClassic View   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

3 in journel on a stroker crank hold togeather

Goto page 1, 2  Next
 
Post new topic    
View previous topic :: View next topic  
Author Message
big G puller
Guest






Report to Moderator

PostPosted: Tue Jan 29, 2013 8:41 am    Post subject: 3 in journel on a stroker crank hold togeather Reply to specific post Reply with quote

will a 3 journel on a 9.5 stroker crank with a 7 3/4 bore hold togeather or break?
 
Back to top
Lynerd
Regular


Joined: 10 Jan 2010
Posts: 58


Report to Moderator

PostPosted: Tue Jan 29, 2013 9:20 am    Post subject: Re: 3 in journel on a stroker crank hold togeather Reply to specific post Reply with quote

Yes Lynn
 
Back to top
View user's profile
Josh Blackburn
Long Time User


Joined: 28 Dec 2009
Posts: 553


Report to Moderator

PostPosted: Tue Jan 29, 2013 9:28 am    Post subject: Re: 3 in journel on a stroker crank hold togeather Reply to specific post Reply with quote

Why risk it. 5020 3.5 journal. You can still fit 9.5 in easy.
 
Back to top
View user's profile
Mike N Mo
Long Time User


Joined: 20 Aug 2004
Posts: 1224


Report to Moderator

PostPosted: Tue Jan 29, 2013 9:34 am    Post subject: Re: 3 in journel on a stroker crank hold togeather Reply to specific post Reply with quote

You'll be better off with a 3.375-3.5" journal size. The 3" will hold for a while, but the bigger ones will last a lot longer.
 
Back to top
View user's profile
big G puller
Guest






Report to Moderator

PostPosted: Tue Jan 29, 2013 9:34 am    Post subject: Re: 3 in journel on a stroker crank hold togeather Reply to specific post Reply with quote

josh how much to do a 9.5 or 9.75 with 3.5 journels
 
Back to top
Brent50G
Regular


Joined: 20 Jun 2008
Posts: 44


Report to Moderator

PostPosted: Tue Jan 29, 2013 1:45 pm    Post subject: Re: 3 in journel on a stroker crank hold togeather Reply to specific post Reply with quote

Yes for a couple years as long as u keep it from detonating
 
Back to top
View user's profile
blackangus
Regular


Joined: 27 Oct 2010
Posts: 27


Report to Moderator

PostPosted: Tue Jan 29, 2013 7:58 pm    Post subject: Re: 3 in journel on a stroker crank hold togeather Reply to specific post Reply with quote

Ive got a3.5/8 with 3.5 journal in my 70 very tight
 
Back to top
View user's profile
Josh Blackburn
Long Time User


Joined: 28 Dec 2009
Posts: 553


Report to Moderator

PostPosted: Wed Jan 30, 2013 4:25 am    Post subject: Re: 3 in journel on a stroker crank hold togeather Reply to specific post Reply with quote

1500 includes flywheel-crank-driver assembly balanced as one unit.
 
Back to top
View user's profile
Tree Topper
Guest






Report to Moderator

PostPosted: Wed Jan 30, 2013 11:10 am    Post subject: Re: 3 in journel on a stroker crank hold togeather Reply to specific post Reply with quote

I have a 9.75 stroke, 6.375 bore, about 9 to 1 compression. Been running since 2004 with no problems yet. Has been pulled pretty hard in 10,200 lb. class many times. Works real well.
Oh yes it has a 3 inch journal!
 
Back to top
buickanddeere
Tractor Guru


Joined: 31 May 2003
Posts: 26922
Location: in front of computer

Report to Moderator

PostPosted: Wed Jan 30, 2013 12:20 pm    Post subject: Re: 3 in journel on a stroker crank hold togeather Reply to specific post Reply with quote

She has to last in order to place first
 
Back to top
View user's profile
Mike N Mo
Long Time User


Joined: 20 Aug 2004
Posts: 1224


Report to Moderator

PostPosted: Wed Jan 30, 2013 1:27 pm    Post subject: Re: 3 in journel on a stroker crank hold togeather Reply to specific post Reply with quote

Tree Topper, Your 3" journal should be very reliable at 622 cu in. We're running 3" journals on A's with more cubes than that, and just replaced a crank after 6 years (before it broke). The engine in question will have 896 cubes, almost half again more than yours, and needs the bigger journal to have decent reliability. Mike
 
Back to top
View user's profile
Big G puller
Guest






Report to Moderator

PostPosted: Wed Jan 30, 2013 3:41 pm    Post subject: Re: 3 in journel on a stroker crank hold togeather Reply to specific post Reply with quote

well iv been running this crank for 7 yrs with 3 in journels 7.5 block thats 832 cubes block went bad so if im gonna replace block to 7 3/4 im going with a new crank shaft befor it breaks
 
Back to top
buickanddeere
Tractor Guru


Joined: 31 May 2003
Posts: 26922
Location: in front of computer

Report to Moderator

PostPosted: Thu Jan 31, 2013 5:17 am    Post subject: Re: 3 in journel on a stroker crank hold togeather Reply to specific post Reply with quote

A 3.5" journal has 1.361 times more material than a 3.0" journal.
 
Back to top
View user's profile
Tree Topper
Guest






Report to Moderator

PostPosted: Thu Jan 31, 2013 9:54 am    Post subject: Re: 3 in journel on a stroker crank hold togeather Reply to specific post Reply with quote

Yes I know this is not a very big G as compared
to what is being built these days, but this set up has worked very well for me. Been very reliable. Don't use the engine up very often even in heavy classes. Lots of fun.
 
Back to top
Indiana Ken
Long Time User


Joined: 10 May 2011
Posts: 692
Location: Northern Indiana

Report to Moderator

PostPosted: Thu Jan 31, 2013 7:12 pm    Post subject: Re: 3 in journel on a stroker crank hold togeather Reply to specific post Reply with quote

buickanddeere wrote:
(quoted from post at 06:17:31 01/31/13) A 3.5" journal has 1.361 times more material than a 3.0" journal.


Yes, this would be correct for cross sectional area. The strength of the journal in tension is proportional to the cross sectional area. However, for a crankshaft, strength in torsion and strength in bending are more important than strength in tension.

If I could repeat your calculations for clarity: The cross sectional area is proportional to the diameter raised to the second power (diameter squared). For a 3" journal we have 3^2 = 9 and for a 3.5" journal we have 3.5^2 = 12.25. 12.25 divided by 9 = 1.361; increase in strength in tension.

The strength of the journal in torsion and in bending is proportional to the journal diameter raised to the fourth power. For a 3" journal we have 3^4 = 81 and for a 3.5" journal we have 3.5^4 = 150.06. 150.06 divided by 81 = 1.85; increase in strength in torsion and bending.

In conclusion the 3.5" journal is nearly double in stength for the more important torsion and bending modes.

With all respect - hopefully this adds to your post. Ken
 
Back to top
View user's profile
Display posts from previous:   
Post new topic    Yesterday's Tractors Forum Index -> Tractor Pulling All times are GMT - 8 Hours
Goto page 1, 2  Next
Page 1 of 2

 
Jump to:  
TRACTOR   PARTS TRACTOR   MANUALS
Same-Day Shipping! Most of our stocked parts ship the same day you order (M-F).  Expedited shipping available, just call!  Most prices for parts and manuals are below our competitors.  Compare our super low shipping rates!  We have the parts you need to repair your tractor.  We are a Company you can trust and have generous return policies!   Shop Online Today or call our friendly sales staff toll free (800) 853-2651.

YT Home  |  Forums Home

Copyright © 1997-2014 Yesterday's Tractor Co.

Powered by phpBB © 2001, 2005 phpBB Group

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