Thread: The Roofus Special

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I currently have two Ford style front leaf spring packs in my stash. One is what I think is a stock model A spring pack. The other was sold to me as a Posies spring pack from a 34 ford (it does have reversed eyes on the main leaf).

Anybody have any guesses as to how close the spring rates might be between the two? ...and what the rates might be?

Anybody have a guess as to how much the spring pack will compress from free state to being on the ground with a 575 lb motor behind the spring?

I am going to use the transverse spring to hold up the IFS set-up and don't really know where to put the spring crossmember.

Actually started installing the boxing plates. I really want these things tied to the inner tubes. I am making plug welds to secure the plates near the inner horizontal edges of the tubes.



Drilled holes two inches apart and ground away the paint



Clamped in place to transfer weld spot to the 1.5" tube



Welded

The alxe I "remembered" being a model A....isn't. I think it is a 1940 unit



I think the spring will be better for this application anyways. The wider spring will put the load out farther on the a-arms.

Now I need to figure out what the crossmember needs to look like. Anybody have any guesses as to how much this spring will compress in this car? ...jag engine with a bunch of set-back vs. stock 40 ford ....I don't have a clue.

Spring will be on top of the lower arms ...I couldn't mock that up.

Today, I feeling like putting the crossmember under the spring and securing it with just two BEEFY u-bolts.

I've seen pics of similar set ups on cars in the past. They didn't exactly give me a warm and fuzzy feeling from a safety point of view.

Has anybody seen one actually fail when the front of the car is held up by the u-bolts?