LegendsRacer - Legends & Bandolero Racing Forum

LEGENDS => Drivetrain & Gearing => Topic started by: Shawnben on December 30, 2007, 01:55:56 pm

Title: Single or double shear?
Post by: Shawnben on December 30, 2007, 01:55:56 pm

What is the difference between a single and double shear rear end housing?

Title: Re: Single or double shear?
Post by: thunder938 on December 30, 2007, 06:59:27 pm

The upper link mount is diff. Location is the same the double has two brackets one on each side of the joint.  The joint rides  between.  The single only has one bracket on the right / pass side of the joint.

Dave

Title: Re: Single or double shear?
Post by: gramps05 on December 30, 2007, 07:04:11 pm

More important than single or double shear, is the rear end STRAIGHT.......

Title: Re: Single or double shear?
Post by: justfreaky on December 31, 2007, 03:07:47 am

 As Dave said; Has brackets on both sides of the Rod End.
My oppinion; The only way to go on suspension mounts.

Steve

Title: Re: Single or double shear?
Post by: MegaMang on December 31, 2007, 11:35:46 pm

Yep.  When I stop being lazy, I'll be converting mine to a double shear.  With a double shear, the stresses are spread across two pieces instead of one.  Stands to reason that the linkage won't fall apart as easily with double shear.  The damage I had to fix this winter is mostly because I didn't have a double shear setup.  >:(  Now to get a look at someone's double shear setup to see what I need to fabricate to duplicate it.  I've looked at the Inex rules, but to be honest, their drawings need work.  They are too rudimentary sometimes, and I can't quite tell for sure if I've got it all figured out right.  I'd rather take a look at one personally and take some measurements, make my own sketches.  At least then I won't have to worry about being dq'd because I didn't read it right.

Mike

Title: Re: Single or double shear?
Post by: justfreaky on January 01, 2008, 02:09:42 am

Mike ,
 Duplicate the same bracket and mount it on the other side of the rod end. If necessary, flip it around.
You can make cardboard templates, if need be.

 Steve

Title: Re: Single or double shear?
Post by: gramps05 on January 01, 2008, 06:31:33 am

Double shear brackets can be had from a dealer or from INEX, don't know how much you know about welding but I can tell you that the axle tubes warp very easily when heated by welding.

Title: Re: Single or double shear?
Post by: MegaMang on January 01, 2008, 08:53:35 am

Ah...  That's the kind of warning I need.  I think I'll get some dry ice in for that welding job.  Luckily the side effect of creating gases for the welding trade is dry ice. :D

I'm thinking I'll also get a bottle and gauge for my brother's mig welder.  Right now it's a dry setup, no gas.  Lots of spatter.  I love how a nice mig welds.

Going to have to see if 600 racing can send me those.

Thanks guys,
Mike

Title: Re: Single or double shear?
Post by: justfreaky on January 02, 2008, 03:00:46 pm

Single Shear:

Double Shear:

Title: Re: Single or double shear?
Post by: qweedqwag on January 02, 2008, 10:04:47 pm

Double sheer is almost manditory on roadcousre racing, it is really hard on the front and rear suspension, especially on the training arms and the top link, be careful when you make double sheer mods yourself, I believe 600 has rules on the distance between the pickup points, pickey  track techs make bust you, especially at the Nationals. See the link here for the info on the spacing on the rear ends page 92-93-94-95

http://probld.600racing.com/documents/2007%20INEX%20Rulebook%20-%20Points%20&%20Appendix.pdf



Mike.
Cherokee Racing.

Title: Re: Single or double shear?
Post by: MegaMang on January 02, 2008, 10:58:13 pm

Thanks Mike.  I've seen this link before.  That's the part I'm afraid of misinterpreting and screwing up.

Steve,  thanks for the pics.  Looks like the double shear on that rear end is a bit thin.  According to Inex, you can go as 1/2 inch steel, that pic looks like it's 3/16 or 1/4"

You got yourself  a nice stash of axles?  Just feel free to throw one of those on a bus going my way.  I love christmas.  :D

Title: Re: Single or double shear?
Post by: justfreaky on January 03, 2008, 05:42:01 am

 Those rear end housings are the ones offered by 600 racing.
The brackets on my rear end are 1/4" and plenty stong.

Steve

Title: Re: Single or double shear?
Post by: qweedqwag on January 06, 2008, 10:35:01 pm

Steve,

That is plenty strong, there is no need to go any thicker, there several good rear end builders out there Jeff Jordan is one of the best .

Mike
Cherokee Racing.

Title: Re: Single or double shear?
Post by: MegaMang on January 07, 2008, 12:01:56 am

Thanks Mike.

Title: Re: Single or double shear?
Post by: qweedqwag on January 17, 2008, 11:24:19 pm

Sparky Grape is also a great rear housing builder, he made me one this week for 500 it is straight and very strong, I have heard that a straight true rear end can get you 3/10ths of speed.

Mike.

Title: Re: Single or double shear?
Post by: MegaMang on January 17, 2008, 11:29:39 pm

Nice to hear.  Of course it's all mystic legends until you prove it out with empirical evidence.   Let us know how it works for you.

Mike

Title: Re: Single or double shear?
Post by: ZForceRacing01 on November 30, 2015, 07:41:57 am

Sorry to dust off this old thread, but if its work a tenth or two its worth it.


Straight and True rear end means What?

I understand a bent rear end will hurt performance?

But are the stock Toyota rear ends  flawed where they should be trued?

Title: Re: Single or double shear?
Post by: VMS Motorsports on November 30, 2015, 01:53:38 pm

It has nothing to do with the Toyota parts, it has to do with who builds the housing. A straight rear housing is a good thing to have