Technical Thoughts on this rear suspension setup

I would think shocks work better out by the wheels, but have no experience with them so far inboard

 

I agree I wonder if there would be a lot of body roll with the mounting points so close together.

Phil

 

For lack of a better term the coil overs are mounted *** backwards. I've done a few ch***is and never seen that before.

 

Backwards and looks weird too boot.

 

Mounting your coil overs like that will encourage body roll, rather than discourage body roll.

That needs to be cut apart and done over immediately.

 

Get new lower coil mounts, and mount them the same distance outboard of the vertical line drawn from the top mount as the current mounts are mounted in board. Well those on the axle and then cut off the ones that are on there now.

 

Pic is from a for sale ad. I had not seen this before and thought it looked wrong. But I haven't seen everything yet.

 

Looks like it was done for form rather than function.

 

If the form was Dysfunction he nailed it!

 

It depends on how much they are asking for the car. If it is cheap enough, it can be easily changed.

 

The closer the spring (any spring) is mounted on the axle out towards the wheel the better. There seems to be more than enough space to have set it up correctly, yet it has been done so wrong............

Motion ratio for a solid axle is usually taken as 1:1, but having the suspension arcing around such narrow mounting points will not do much to control body roll. Sea sick tablets might be in order.

 

I think this arrangement lessens your spring's leverage on the axle. The wider it is spread, the more stable the car is. There is probably an official term for how far the spring's mounts are apart. Anyone?

 

Looks totally counterproductive.

 

Belongs in the mickey mouse repair thread.

 

Extremely weird looking.

 

Not optimal but it'll work.

 

Read the above reply from Gimpy. This setup does the exact opposite of what you want a suspension to do.

 

That's a very loose use of the phrase "it'll work"..............

 

Holy ****. No.

 

Kind of like standing up with your legs crossed. Then some guy gives you a shove.

 

Somebody had the blueprint upside down!

 

That's brilliant. If basic suspension theory was presented like that, more people would understand, and far less stupid **** would be done.........

 

There are advantages of setups like that.....But not on a hotrod.

I've seen this type of geometry work very well on Off Road vehicles that need relatively stiff straight line suspension [for jumps]

 

Rite... Dyslexic comes to mind.

 

Buy it!

 

Yep, the wheels will go 'round so job done.

 

Depending on how well the front suspension is set up, and how heavy the engine and transmission is, this has the potential to be dangerous.

 

It has to be a clown car. The brake line looks like a 2 year old installed it and nobody in their right mind paints a rear axle white.

 

With conventional wisdom you are 100% correct. But there are some innovative designs that go against the grain.
Normally with laid down coil-overs , during body the outside spring becomes more perpendicular to the forces applied when it compresses more.
This is the principle behind "Rising Rate Suspension" that McLaren introduced [except they used rockers arms]
Honda also used these principles with their Pro-link

I've seen the above style on an off-road racer where they needed a very stiff wheel rate for straight line jumps but needed it to have soft roll stiffness to prevent oversteer. [decreasing rate suspension]

I've also seen a Left-Turn dirt car with only one rear coil-over . The Right Rear was totally removed.
It had so much L/H weight bias, that the RR wasn't needed. The LR was moved inboard [so basically it was a "tripod" with no rear roll stiffness]
All the weight jacking was done at the RF.

That car had a lot of corner exit lift on the RH side by setting the links with a lot of "anti-squat"

[The example the OP posted isn't any of these]

It would be interesting seeing how that fibregl*** body stood up when that landed. [especially with a ladder frame and no roll cage]