Hello Everyone, I have been a lurker for a couple of years and figured I would post my new project. Me and a buddy are making two at the same time so progress is not very quick. Thanks to all who have posted in the past and future, as this is where most of what little I do know about A-arms came from. There is a lot of info here, that is for sure. Thanks also to DesertGuy and Kevin at H&M for him letting me pick his brain over the last few years.
The cars are going to be identical for the most part. They are play cars that will attempt to see some street time. They will be water cooled something or other. Trans will be what fall from the sky.
108" Wheelbase.
80" track
19" front and rear travel.
Internal Bypass on all four corners.
Saginaw Steering gear.
DOM .120 1.5" cage.
4130 for plate work.
2300-2400 lbs.
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Cool another Thing project! Keep us updated. I wanted to do a arms on my project but I had all the front end stuff so it saved a lot of money. Thanks for a little motivation, I haven't worked on mine for a month over the holidays.
I have been checking for your updates. Your build is inspiration. I still need to figure the steering out. I had it good with a rack but need to figure the swing set out with the saginaw gear. Doing everything twice makes for a slower build, but hope to move along now that the arm geometry is set. The front end sheet metal makes for a wide track without a severe front push. I am running 33x9.5's to gain some lost ground clearance I have been used to in a beam.
Well, the LCA mounts have a bunch of welding. The pic is a finished one (previous version). It reminds me that, though designing it may be easy, actually building it is another thing all together. Been working on the swingset. This is my "dirty model" , actual brackets and design will change once the geometry is figured out. I like configurations and such but I find it quicker for me to just have a model dedicated to function. Hopefully I can start the final soon. It is a bad habit to say I'll clean house later.
I am building kinda backassward and not ideal, but I dont have the cash for a fluid flow of parts. Although the swing works, will the throw of the spreader bar be too short?
Anyone have thoughts on using a manual saginaw 525 box. Should I just use the 600 or 800 box and go power?
Even though they will swap bolt pattern wise, ratio difference would kill the interchange.
Did a little playing. True track is going to be 81. New tire will be a 31x10.5 or 9.5. I may be able to fit a 33 if I open the wheel well. The white car may get that anyway since the rust needs cutting out. As stock the 31 clears by a 1/2" on bump and lock. The mock up put some needed wind in my sails.....and resulted in me tightening my wheel bearings on the other car. The spindle is a Right since that was the loose one.
I picked up a Saginaw box, pitman for cutting up, and a U-joint. The swing set works now but have some time figuring out how and where to hang the swingers.
I have been working on the steering and that is super fun. The swingers will be billet and bushed. I am not sure if the swinger is perfect (loose term) but it seems to work. They are about 4.75" long. The saginaw mount is a work in progress as is most the plate work. Hopefully now that things are at least drawn, I can move along a little quicker.
I guess this is the time to ask before I get to far in.
Toe at ride- .03 in
at bump-.02 out.
at droop-.2 out.
How far can I go with the toe out on droop?
Those numbers are with 18" travel, it starts toeing out hard at the bottom of droop, but comes back quick on bump. I have played with the rack and tie rods till I cant see straight.
with your ride height and bump having similiar #'s it looks like the rack neesd to move up slightly to eliminate the toe out. When you do this yo might need to narrow the inner tierod pivots (longer tierod)
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Re: Poorguys Twin Things
