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Old 02-20-2014, 10:10 AM   #1
whitedog76
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Anti-wrap spring perches

Are anti-wrap spring perches worth it?

Will they affect ride quality on the street?

http://www.barnes4wd.com/Anti-Wrap-L...a-70_p_84.html
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Old 02-20-2014, 11:52 AM   #2
Keith Seymore
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Re: Anti-wrap spring perches

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Originally Posted by whitedog76 View Post
Are anti-wrap spring perches worth it?

Will they affect ride quality on the street?

http://www.barnes4wd.com/Anti-Wrap-L...a-70_p_84.html
"Worth it" in what way?

For $26 bucks they look like a nice, robust spring perch. If I needed perches they would probably be a good deal.

Will they affect spring windup? No. They spring will wrap from acceleration/braking forces just like it would with any other perch.

Will they affect ride? Nope. There is no change in the way the spring is constrained in its vertical travel.

K
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Old 02-20-2014, 02:43 PM   #3
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Re: Anti-wrap spring perches

^^ x2
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Old 02-20-2014, 07:22 PM   #4
whitedog76
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Re: Anti-wrap spring perches

I guess the idea behind the longer perches is that they will bottom out on the springs when you get on the gas, helping to limit some of the axle wrap. Kind of the same principle as a traction bar.

My concern is when loaded or flexing over a bump. Will they limit some of the spring travel or cause unneeded strain on the springs?

My last truck had Leafs that were fairly flat. In fact the bottom spring was actually bent backwards. I can see perches like these being a problem in that situation.
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Old 02-21-2014, 01:28 AM   #5
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Re: Anti-wrap spring perches

Those look to be good quality for the price.
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Old 02-21-2014, 09:04 AM   #6
Keith Seymore
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Re: Anti-wrap spring perches

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Originally Posted by whitedog76 View Post
I guess the idea behind the longer perches is that they will bottom out on the springs when you get on the gas, helping to limit some of the axle wrap. Kind of the same principle as a traction bar.
My assumption as well - and there is no way that slight additional length will counteract the forces causing spring windup. That's why people control the windup with traction bars (or by adding extra leaves to the spring pack).

Quote:
Originally Posted by whitedog76 View Post
My concern is when loaded or flexing over a bump. Will they limit some of the spring travel or cause unneeded strain on the springs?

My last truck had Leafs that were fairly flat. In fact the bottom spring was actually bent backwards. I can see perches like these being a problem in that situation.
Again - that additional length is so insignificant as to have no measureable affect. The perches will cause the same amount of stress as the production versions; only in a slightly different spot on the spring.

K
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Old 02-21-2014, 11:13 AM   #7
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Re: Anti-wrap spring perches

I guess, I'm over analyzing things.

My plan is to use them on my 54. It's not even a 4x4. I just figured the 4x4 guys would have more insight on an axle swap.

I'm going to be bolt up a 14B in place of the Eaton. I'm also planning on using springs that are 10" longer than stock. Primarily for ride quality. Being longer than the oem, I'm betting they will flex more, which made me think of the anit-wrap perches.

Like I said, I'm probably over analyzing things. I'm not going to run big horsepower, or big rubber, so it's probably not a big deal at all.
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Old 02-21-2014, 12:46 PM   #8
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Re: Anti-wrap spring perches

If I needed to change spring perches on a 14-bolt I'd buy these because they are built heavy. Axle wrap is the warping of the spring due to being the point to absorb the torque between the tires (bolted rigid to the axle) grabbing traction and the vehicle. These will have a negligible affect on that,if any at all. They re still attached to the axle and don't span the spring length enough to have any affect. Figure the flex in the spring is greatest at the mid point between eye and axle. Traction bars form a rigid link between the axle and frame as far as axle rotation goes
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