Technical Model A on 32 chassis, rear subrails.

Well this is nothing new but just a slightly different way of doing what has been done several times before. While researching the many different ways to do the rear subrails of my 31 Model A coupe on 32 rails I finally had a game plan. Allot of guys have used Rolf's method of using rectangular tubing and cutting several relief cuts to get the rear profile. As they say there is more than one way to skin a cat, I basically used the same method but took a slightly different approach.

I started out with a flat piece of 14ga steel cut 4" wide and bolted and clamped it to the top of the frame rail to get the profile.
Then I marked and cut out a 1" piece to weld to the outside edge to weld the inner wheel well to.
Then welded the whole edge and smoothed it all out.

This piece basically is only to help with mounting to the outer wheel well but it also helps blend into the model a subrail.

 

Thanks for posting ideas, we need more of that.

 

Well I'm not sure how to get rid if the dreaded red X so I will try this.


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Then I took a piece of 1x3 rectangular tubing and cut it in half horizontally with a cut off wheel in my 4 1/2" grinder. And put some relief cuts in only the sides and started clamping it to the frame rail.
I would clamp it and weld up the relief cuts as I moved back. I found if you weld the inside of the tubing and use a copper welding spoon on the outside there is allot less clean up.
Once the bottom was made I just did the same with the top and closed it back up.




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Then I lined everything back up and got the holes drilled and got them bolted in. I ran a few small beads along the outside and did a few plug welds on the bottom side to tie the two pieces together.

Then I wanted to build a piece to go on to of the rail to help blend it in with the stock rail.


Anyways nothing too fancy but I was happy with how it turned out and thought it might be helpful to somebody doing a similar job.





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Wow. Nicely done!

 

Wow, as I heard someone say onetime, that's as smooth as a Moose's root.

 

Also:
That's "finer than frog hair" - per my shop teacher 1989

 

looks great

 

Thanks guys!


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looking good.....nice work !

 

Nicely done. Thanks for posting.
I'll be doing the same thing on my '28/'32 soon.

 

Nice! Thanks for posting that. Bob

 

Really nice work, I like how you tapered the original rails into the new ones, really finishes it off well.