Chassis twist, Weak spots Options

[r_towle]

Hi there,

So over the years I have seen all sorts of ideas, lots of products etc..

Seems like we are chasing our tails.

Here is my dilema, and I would like to get some input.

Take a 34 year old chassis, fix the rust.
Add super stiff suspension.
Bearings, bars etc.
add really sticky rubber.

Now, what gives in the chassis...where is the weak spot.
Say I seam weld the suspension console.
What next...something needs to flex, or it seems to me that something will break instead.
I ahve seen pics from McMark of a cracked long inside, and in the miidle of the span..not a rust issue per se, but a fatigue issue.

So, where can I engineer in flex, so the chassis wont crack, or break a weld.

No Cage allowed.
Just the chassis.
Currently there is not inner long kit, or outer...just good repair work on the rust to date...
Nothing is cracked yet...but something will have to give..
I just put in roller bearings....now its really smooth, but now more of the forces are put directly into the chassis...

Rich

[woobn8r]

If you look at many newer cars that have been engineered for ease of assembly with parts/systems/assemblies sourced from all over the world you see sub frames that bolt to the chassis with 4 - 6 big bolts...from these sub frames, all the suspension is hung.....and maybe a shock mount on the unibody...

Are you looking for this type of solution? Say you cut off the rear suspension console and fabricated a sub frame to accept the trailing arms...this may isolate the forces being transferred and possibly reduce the stress on the unibody, but there is alot of engineering, testing and fabrication here...ultimately I believe you would be adding substantial weight and changing the chassis dynamics....basically building your own car using a 914 for a starting point.

I'm with ya...no roll cage here either...I'd love an easy solution, but I think you have to work with what you've got...I don't want a miata!