Cantilever on s197?

[KillrStang]

Has anybody tried to do a cantilever setup on a s197?

Second part of the question is it worth it to move all that unsprung weight?

 

[kevinatfms]

i cant imagine how expensive that would be, i think your talking $$$$$ in development alone, then factor in the $$$$$ to make certain components that may not benefit the chassis design.

 

[908ssp]

That black and green RTR car with the new old style body has one installed. I'd have to have someone prove otherwise but think it looks cool but does little else. Now if someone wants something really cool put a T56 transaxle in a S197 with a torque tube now we're talking.

 

[DILYSI Dave]

Cantilever?

 

[KillrStang]

That black and green RTR car with the new old style body has one installed. I'd have to have someone prove otherwise but think it looks cool but does little else. Now if someone wants something really cool put a T56 transaxle in a S197 with a torque tube now we're talking.

Your saying an AWD mustang? or are you talking torque tube like some porsche have?

 

[KillrStang]

here is the top side of the RTR cantilever set up

 

[DILYSI Dave]

Ah. I've always heard that called pushrod, not cantilever. It adds unsprung weight, and it moves weight up high. So from that perspective, it's a loss. The reason I'd be tempted would be if it was needed for tire clearance that wasn't available otherwise.

 

[Tay]

Your saying an AWD mustang? or are you talking torque tube like some porsche have?

I think he's saying torque tube like corvette with the transmission mounted in the back.

 

[KillrStang]

Ah. I've always heard that called pushrod, not cantilever. It adds unsprung weight, and it moves weight up high. So from that perspective, it's a loss. The reason I'd be tempted would be if it was needed for tire clearance that wasn't available otherwise.

I dont believe that is correct... i hope someone can chime in on this. My thought is that since the spring and strut is in the trunk its supporting its own weight, so reducing UNsprung weight. if that makes sense. Yes you are adding curb weight but reduce UNsprung weight

 

[KillrStang]

I think he's saying torque tube like corvette with the transmission mounted in the back.

That would be pretty cool.... Porsche actually started that i believe

 

[jayel579]

I think he's saying torque tube like corvette with the transmission mounted in the back.

Yeah and a LS# motor, you'll never have a power issue again...

As much as I love my mustang those bow ties make some stupid power but I am completely off topic of the OP with that, this is a whole another debate

 

[dontlifttoshift]

I dont believe that is correct... i hope someone can chime in on this. My thought is that since the spring and strut is in the trunk its supporting its own weight, so reducing UNsprung weight. if that makes sense. Yes you are adding curb weight but reduce UNsprung weight

At first glance you are right because it LOOKS like the pushrod weighs less than the coilover. However, as suspension travels so does the pushrod and so does the rocker arm and so does the coilover so in fact you did add unsprung weight.

That's the way it was explained to me.....I'm not smart enough to argue.

Donny

 

[KillrStang]

Haha me either donny im just stating what ive heard. Lol

 

[908ssp]

That would be pretty cool.... Porsche actually started that i believe

Actually it was done a lot farther back then that. I know for sure Alfa had it in the late 30's and it was probably around before that. My 1976 Alfa had a transaxle with inboard disc brakes and DeDion rear suspension [kind of a cross between independent and SRA.]

 

[KillrStang]

Man Learning all kinda of good trivia here

 

[908ssp]

There is always some debate on what percentage of some parts are to be considered sprung or unsprung weight. Usually in a push rod setup half the push rod itself is considered unsprung so the shocks and springs in the cantilever setup above would be considered sprung. In a convetional coil over the rod and piston are unsprung the shock body sprung and the coil half and half. With the push rod because of the pivot piece aka rocker the percentage after that pivot is much smaller unsprung and more sprung. Sometimes the advantage of setups like that are in packaging say in a formula car or replacing shock towers with a flat floor. With the RTR setup I think it is mostly because it looks so cool.

 

[Tay]

Has anybody tried to do a cantilever setup on a s197?

Second part of the question is it worth it to move all that unsprung weight?

I have thought about this too. I was thinking something like this
http://www.totalcontrolproducts.com/rpss_fd.html

 

[DILYSI Dave]

Anything that is between the spring and the ground is unsprung. Wheels, axle, and in the case of a pushrod setup, the pushrod and rocker. They can have some advantages, but reduction in unsprung weight generally isn't one of them unless you are talking a very large motion ratio rocker with a small, stiff, short stroke spring and shock (think indycar parts). Outside of something like a 5:1 rocker, with a spring that is 5X as stiff and a shock with 1/5 the stroke, you're going to gain unsprung weight.

 

[Sleeper_08]

The rear axle weighs a lot and it stays as sprung weight. Considering the relatively small amount of weight that would become unsprung and the complexity involved in designing and building the mounts so that they would not tear out of the body it hardly seems worth it.

 

[SilentScope]

you would benefit more from an IRS setup than the cantilever