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nitro20%

A-Arm suspension tube size?

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ITS TIME! A-Arm Suspension.

I am learning that i have no idea what the fk i am looking for, and is compiling into "i dont have a clue what im doing."

i have a very light weight mid engine vw sand rail, im sure one of you remember me from a few years ago, the rails name is Freshly Squeezed, its an orange Prowlers Sand Sprite 3. 

it weighs no more then 7- 800#s if that, i can pick the front end up with one arm, with some effort, of course.

i want to use:

chromoly 4130, 1" od x.095" wall

5/8 hiems and reduce to 1/2 inch x 5/8 

im fabricating my own spindles with 1 -1/4 tube, 1/2 inch bolt size bungs at both ends, with a spindle attached to one side and a boxed steering arm that welds around the tube and onto the spindle. im pretty confident on this idea

#1. i am having problems finding weld inserts to fit 1' OD x .095,  so do i reduce the OD to 7/8 od x .095 wall which i am able to to find 3/4 ID pipe bungs easliy and use the 5/8 male end?

Any suggestions i am open to. using 1 inch male end heims, etc 

#2 am i even starting out with the right idea on the tube size? strong but no need to make it stronger then the frame, lite, but not to build it so it fails. 

I started out with 1'" OD x .120" wall but i really thing that is going to be WAY to much and really heavy, then theres 1"ODx .065 wall but the threaded bung thing and will that be to weak?

 

Edited by nitro20%
' to "

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Some related info here:

 

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1 hour ago, nitro20% said:

ITS TIME! A-Arm Suspension.

I am learning that i have no idea what the fk i am looking for, and is compiling into "i dont have a clue what im doing."

i have a very light weight mid engine vw sand rail, im sure one of you remember me from a few years ago, the rails name is Freshly Squeezed, its an orange Prowlers Sand Sprite 3. 

it weighs no more then 7- 800#s if that, i can pick the front end up with one arm, with some effort, of course.

i want to use:

chromoly 4130, 1' od x.095' wall

5/8 hiems and reduce to 1/2 inch x 5/8 

im fabricating my own spindles with 1 -1/4 tube, 1/2 inch bolt size bungs at both ends, with a spindle attached to one side and a boxed steering arm that welds around the tube and onto the spindle. im pretty confident on this idea

#1. i am having problems finding weld inserts to fit 1' OD x .095,  so do i reduce the OD to 7/8 od x .095 wall which i am able to to find 3/4 ID pipe bungs easliy and use the 5/8 male end?

Any suggestions i am open to. using 1/inch male end heims, etc 

#2 am i even starting out with the right idea on the tube size? strong but no need to make it stronger then the frame, lite, but not to build it so it fails. 

I started out with 1' OD x .120 wall but i really thing that is going to be WAY to much and really heavy, then theres 1'ODx .065 wall but the threaded bung thing and will that be to weak?

 

It's  0.92lbs (0.095 wall) vs 1.12lbs (0.120 wall) per foot (DOM).  Even centermount, you're talking 3-ish lbs per arm difference?  Overthinking it I think. :bigrin 

Edited by Rockwood

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i believe mine are 1 1/4 4130 tubing on my uppers. dont recall wall thickness, but they really arent that heavy in weight.

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3 hours ago, nitro20% said:

ITS TIME! A-Arm Suspension.

I am learning that i have no idea what the fk i am looking for, and is compiling into "i dont have a clue what im doing."

i have a very light weight mid engine vw sand rail, im sure one of you remember me from a few years ago, the rails name is Freshly Squeezed, its an orange Prowlers Sand Sprite 3. 

it weighs no more then 7- 800#s if that, i can pick the front end up with one arm, with some effort, of course.

i want to use:

chromoly 4130, 1' od x.095' wall

5/8 hiems and reduce to 1/2 inch x 5/8 

im fabricating my own spindles with 1 -1/4 tube, 1/2 inch bolt size bungs at both ends, with a spindle attached to one side and a boxed steering arm that welds around the tube and onto the spindle. im pretty confident on this idea

#1. i am having problems finding weld inserts to fit 1' OD x .095,  so do i reduce the OD to 7/8 od x .095 wall which i am able to to find 3/4 ID pipe bungs easliy and use the 5/8 male end?

Any suggestions i am open to. using 1/inch male end heims, etc 

#2 am i even starting out with the right idea on the tube size? strong but no need to make it stronger then the frame, lite, but not to build it so it fails. 

I started out with 1' OD x .120 wall but i really thing that is going to be WAY to much and really heavy, then theres 1'ODx .065 wall but the threaded bung thing and will that be to weak?

 

If I remember right you had the sand sprite arm front end?

I may have some pictures of a couple conversions saved if you'd like to see them. I may have sent them to you 5 years ago too.....

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Current ad I saw on Craigslist. Not a Sand Sprite, but similar frame and thought it was fairly well done:

0EB556C0-4132-468F-9489-29A91B6E9488.thumb.png.511c1b176f5406e66f3e7a039bc3aa01.png

F6514CBD-6D04-4D94-B587-96A00A771AFB.thumb.png.9a63bf98dac6371d99021ec933490746.png

CA863C10-C0E6-4E47-A962-DE6FDC0BF43C.thumb.png.790d049d0ef57a6cc6de0d2799955c10.png

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6 hours ago, Rockwood said:

It's  0.92lbs (0.095 wall) vs 1.12lbs (0.120 wall) per foot (DOM).  Even centermount, you're talking 3-ish lbs per arm difference?  Overthinking it I think. :bigrin 

yes sir i am when its put like that. thank you for the info.. dosnt really make a difference at 3#s.

Edited by nitro20%

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i know of some fab store web sites but is there a one stop shopping for tube, heim joints, and tube adapters/weld in bungs of ALL sizes. i think mostly what im looking for is a shop with good heims, medium duty but good quality, and bungs of all sizes with an option to get discounts on 10+ heims, nuts, bungs, bolts

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16 minutes ago, nitro20% said:

i know of some fab store web sites but is there a one stop shopping for tube, heim joints, and tube adapters/weld in bungs of ALL sizes. i think mostly what im looking for is a shop with good heims, medium duty but good quality, and bungs of all sizes with an option to get discounts on 10+ heims, nuts, bungs, bolts

FK is the only heims I’d run. RuffStuff has all of it, but their heims aren’t the best. Otherwise Barnes4WD stuff isn’t bad. 

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6 hours ago, nitro20% said:

i know of some fab store web sites but is there a one stop shopping for tube, heim joints, and tube adapters/weld in bungs of ALL sizes. i think mostly what im looking for is a shop with good heims, medium duty but good quality, and bungs of all sizes with an option to get discounts on 10+ heims, nuts, bungs, bolts

Chassis Shop  https://secure.chassisshop.com/

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14 hours ago, nitro20% said:

i know of some fab store web sites but is there a one stop shopping for tube, heim joints, and tube adapters/weld in bungs of ALL sizes. i think mostly what im looking for is a shop with good heims, medium duty but good quality, and bungs of all sizes with an option to get discounts on 10+ heims, nuts, bungs, bolts

https://www.ruffstuffspecialties.com/catalog/

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9 hours ago, sausage450r said:

I'm running some ruffstuff heims on my car until I can swap them all to fk, I've stuffed my front end pretty hard multiple times and they are just holding like a mofo. Very pleased this far. 

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On 2/14/2020 at 6:03 PM, Rockwood said:

FK is the only heims I’d run. RuffStuff has all of it, but their heims aren’t the best. Otherwise Barnes4WD stuff isn’t bad. 

so why do i want to use chromoly over regular steel?  my rig dosent weigh but 900#s. plus i have to fab the front a-arm mount from plate, and regular steel is way cheaper at that point? 

having to order all this metal has a huge shipping fee, ruffstuffspecialties has a great rate and i could get every thing i need but one piece for 1050.00 and 26$ shipping. thats shocks, heims, tube, and a piece of plate steel.

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I would do 1.20 wall 1 1/4 DOM tube for sure

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26 minutes ago, Chingon619 said:

I would do 1.20 wall 1 1/4 DOM tube for sure

thank you. definitely would be a plus to make the lowers a little beefier.

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On 2/14/2020 at 6:03 PM, Rockwood said:

FK is the only heims I’d run. RuffStuff has all of it, but their heims aren’t the best. Otherwise Barnes4WD stuff isn’t bad. 

FKs. i take it you want the 70$ ones? 

So many hiems on the interwebs. looking at price ranges around 30-45$.

 

 

 

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2 hours ago, nitro20% said:

so why do i want to use chromoly over regular steel?  my rig dosent weigh but 900#s. plus i have to fab the front a-arm mount from plate, and regular steel is way cheaper at that point? 

having to order all this metal has a huge shipping fee, ruffstuffspecialties has a great rate and i could get every thing i need but one piece for 1050.00 and 26$ shipping. thats shocks, heims, tube, and a piece of plate steel.

They last longer from a wear standpoint. That being said, 5/8” rod end is probably overkill, so I wouldn’t worry unless you went super cheap brand. 

No metal supply shops near you? Way cheaper to go to a local yard. 

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1 1/4 x .120 DOM would be my choice for front suspension on a lightweight car. I wouldn't use mild steel tubing it'll bend. 5/8 heims for the uppers at the frame are adequate, I wouldn't use anything smaller than 3/4 for the lowers and the spindles.  Do it once and be done with it too much work and expense to change it after the fact.

Edited by fortyfour

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