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Whats this for?


Guest Frank280z

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I looks like a good way to get hurt if you get near it!

 

Seriously, the pic is sooo small I can barely see it. I almost looks like a strange attempt to do an inboard suspension combination so unsprung weight is reduced. Again, the pic is too small for me to see. Maybe someone with a big monitor can do better.

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Guest MM_280Z

There's got to be some sort of rod going down to the wheel. Pretty trick looking setup though! You got a bigger picture?

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I've seen a bigger picture of this somewhere.. I believe it's a 93-95 RX-7 with an inboard shock setup. There's a rod that goes up and pivots that silver triangle around the bottom point, compressing the shock.. pretty trick.. i wonder if I could ever find the full-size pic...

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Interesting, seen that on some Pike's Peak modded cars as well as circuit-based cars in Japan. A couple had the assemblies mounted horizontally across the floor, what's the advantage to this? Maybe its lower ride height with increased shock stroke?

I hope someone knows the answer.

Owen

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That is very interesting, although I don't see the point - easier spring swaps?

 

The GP cars use pushrod susp. for aerodynamics - gets the "dirty" (aero-wise) springs and shocks hidden away behind farings.

 

I guess if the strut was replaced by a simple tube, it would allow more room for a deep offset, wider rim. That might actually be a cool way to get huge tires in the back of a Z. Those one piece coil overs can be had for $500/pr or so. Add another $3-400 for the hardwarefabrication - might be cost effective vs. flares and a new paint job....

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If you do this right and use a shock with the shaft attached to the arm at the top of the strut tower (as shown), you could lower the unsprung weight. That is IF you have the struts empty, and use a tube welded to the top of the strut tube to the rocker arm.

 

I doubt you'd get much more tire under the back of the Z - with coilovers and the perch above the wheel, etc. the tire is getting pretty close to the inner side of the wheel hose. You could put mini-tubs in of course.

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Guest Anonymous

Wow, thats cool. I've seen that done in the front of street rods, looked awesome, they had just chromemoly pipe for the a-arms and a couple running pipes inboard to the suspension like that under the hood. Really clean.

Far as the reasoning behind this, I guess I'd have to speculate like you others, probably simpler to flip the hatch up, change a spring rate, or make a ride height adjustment. Definately would stiffen the towers with that mount in there. I think using that method you can also effect the ratio on the shock by changing those bellcranks to different lengths on the end (although I doubt they do that on this setup.). Be real cool to have adjustable regular coil over shocks with a knob on the body, pop the hatch, give em a twist.

 

Lone

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Pretty neat! And yes, that's certainly a TT RX7, I recognize that dashboard icon_smile.gif Looks like it pretty much bolted in too, I'll bet we could do that if there was any benefit. You'd have to do some work on the strut tube obviously but it would give you SOME room. More suspension compliance and shock travel along wiht less weight on the wheels. Hrm! Kind of a neat setup IMO but keep the kiddies fingers away and hope nothing breaks to shoot a spring up front! Ouchie! icon_eek.gif

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Definately used to decrease unsprung weight. Thats one reason F1, CART etc. use an inboard setup. The other for them is that they can be much more aerodynamic without having springs and struts cutting through the air, instead replaceing it with a oval shaped carbon fiber rod. Not an issue on fendered cars.

 

Our F-SAE car will be an inboard setup, and I'm on the suspension design team. Hopefully I'll have some good insight at the end of the summer.

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