84rzv500r

Found a few more Pics to post...

Twin_Turbo

nice! love the 12 pnt nuts..quality fasteners

MEGALADON

Very cool

SmokedTires

Great job

shafrs3

Those are nice, ditto on the 12 points.

sting66cp

Who makes these?

turtlevette

what's the cross shaft made of?

Twin_Turbo

Looks like stainless

panic

aren't these the vansteel stuff?

turtlevette

Is that going to be strong enough? In my opinion the upper and lower front cross shafts are the most important pieces of the suspension and thus require a lot of strength and fatigue resistance. Evey time you hit a pothole these pieces take a pounding placing many tons of shear impact loading on them.

Seems like i remember someone talking about aluminum cross shafts. That seems crazy to me.

Twin_Turbo

they are impala arms I think. IMO alu arms are not a good idea for a street driven vehicle, for a race car..yes, street no.

Pacha

The front susp on C3 was taken from an Impala, I think a '63. I wonder if we can just buy Impalas a arms and fit them with no mods.

Pacha

big_G

Except when used on C-4's, 5's and 6's, of course. BTW, turtle, they also have aluminum cross-shafts. (All pieces forged, I believe)

Twin_Turbo

yes but no one makes forged alu arms for our cars and those C4 ones... they are pretty easy to snap, it doesn't take a whole lot of abuse to rbeak one (esp. the uppers)

84rzv500r

316 Stainless....

There you go again Turtle... Now I need to build an ANSYS model and run a couple million cycles to see what happens...

You sure know how to spoil a party....

turtlevette

are you serious or just making fun of me? I'd be interested in your results. I have aluminum caliper brackets i'm worried about.


This kind of in depth analysis is what i envisioned in the tech section when we started it.

Twin_Turbo

Doing a FEA isn't that hard however those should be strong enough, the upper arm doesn't nearly see the loads that the lower one does.

84rzv500r

I was poking some fun kinda...

I was gonna make them from 7075-T651 its about as strong as 316 stainless but I felt like the stainless would fail in a more graceful manner.

I have the geometry of the part already, We know the material properties, and I'd bet we could get some good estimates of the loads on the members with a little work.

That said I had a 6' long 1" bar setting there and it will work.

Static loads are pretty easy.... It's dynamics and fatigue that'll get ya. I switched from Engineering to Mathematics and now I'm working on Comp Sci.

comp

Nice

turtlevette

Go back to Engineering and get a real job.

Most of us see bent lower cross shafts when we rebuild the bushings and that's a pretty stout piece of steel so this is what worries me.

I was able to beat it straight with just a few blows from a hand sledge so maybe the stock cross shaft is not even that strong.

You gonna come run with me when you finally get that thing together? There has been a small resurgence of C3s in the COM club. I roped Restorod79 into the game although it looks like Scooter70 is retired.