WTF? super-duper high speed spring perches?!

i've seen my fair share of aftermarket parts, but these perches are really throwing me for a loop. I don't think I have ever seen a pair like this- they're m***ive! I took pictures of them next to a stock set of 1932-1934 perches and a set of So-Cal perches. The So-Cal perches are a pretty standard in size and style for after-market perches.
The brown ones in the middle are the ones I am curious about. Can anybody enlighten me?







-Rob

 

Look into the Gene Scott place, Vintage Ford, PSI, etc. in Rosemead...I think they were the first to start reproducing this stuff. Looks like it is proportioned as much as possible to add material to compensate for beigng cast--? rather than being weakened by impersonating a forged piece. Just guessing, and I do not know where my olde catalog from them is at the moment.

 

I don't think so, Bruce. What makes me wonder about this piece is the taper. It's got so much more height that I ***ume the axle (female end) would have to be deeper (wider at the top) as well.

 

Definitely cast, look at that skinny little parting line across the top. Just because the taper is larger doesn't mean it has to be completely seated to the hilt I guess... in fact if it did, I don't think you'd have room for the shackle to articulate before hitting the top of the axle. They look narrower as well... which would mean model T maybe?

 

I think the long taper just compensates for the heavy top, allowing taper to get down to right size for the actual seat without having to weaken the top with a heavy undercut.

 

Bruce nailed it first post! Been going through a Gene Scott "Boss T" catalog for the last couple of days getting some inspiration, and that is where they came from.

 

Wow, I wouldn't have imagined they'd continue the taper so much.

Good memory, Bruce.

 

Damn Bruce, I was going to say that those were special perches for '32 heavy axles.

 

Thanks guys! I did some more looking and this is what I have found out:
-The width is 1-3/4" which is standard for 1928-1934 perches.
-The ID of the bushing hole is 3/4", which is standard for 1932-1934 perches.
-Cast into them is what looks like a 'D' on the bottom and another insignia on the top which I can't quite make out.
-It looks as though they were made in two pieces and pressed together. They look like they are cast, but I also know that you can run into serious trouble while press-fitting into cast.

This picture was taken of the perch on an early V8 wishbone to see the taper:


The casting marks:



What seems to be a seem for a press-fit:

 

Do you have any pictures from the catalog?

 

I'll dig them out later, IF I can get my scanner to cooporate again... It's starting to go rouge again. But, ya Gene Scott made those all through the sixties and up into the mid seventies, along with most of his kits. I even remember seeing them in a Rod&Custom Quartely ch***is buyers guide as late as '78 or '79.

 

that would be awesome. i can't seem to find anything online about the catalog.

 

yep, right when i seen them i said PSI, they made some really neat and nice stuff.

 

Looking at the pics I can why you would think "press fit", but that doesn't seem mechanically strong enough for a joint on this part.

I'm wondering if the upper part was cast onto the lower tapered shaft? That way, the shaft could have a shape that both prevented it from turning in the shackle bracket, as well as pulling out of it. In addition to which, the tapered shaft would be made of a malleable material, since it gets put in tensile load whent he nut is tightened. Does that make sense?

Ray

 

That makes a lot of sense. If the lower 'rod' was mushroomed or tapered out at the top it would make sense. It would prevent the shaft from being pulled out of the bottom and it was also make press-fitting into a cast piece unnecessary. Otherwise, I can't imagine that they wouldn't crack every other one!

Thanks guys!!