86 951 Driver

Can't you get those faster blocks from someone parting out their car?

YZ250

Control arm kit:
http://www.paragon-products.com/Cont....153d-race.htm

"... includes 2 steel arms, the front Racers Edge Delrin bushings and the rear Weltmeister polygraphite bushings."

Caster blocks:
http://www.paragon-products.com/Cont...77.407.169.htm

The only issue with the caster blocks is that they are $72 each.

YZ250

Should be possible. Just have to make sure to go back far enough in the 944 or 924 line to get the right ones.

ninefiveone

Yeah. That's what I'm talking about and already have on the car. Doesn't work for heavy track usage.

$140 for a set of castor blocks + $20 for bushings isn't bad, in my opinion. If you're not tracking the car heavily, they work well and are affordable.

The racer's edge spherical bearings I'm moving to are $380 a set.

xschop

I don't like spericals in the rear control arm pockets as the inner bushing mount nuts are spot welded an break easily due to the harsh vibrations. They are a nighmare to repair. I have not tried Delrin in the rear bushings. Does anyone have experience with them?

YZ250

It may not have worked for you, but it works fine for me. So far, I have about 20 track days on the setup, mostly PCA club racing, with no issues and no visible wear.

ninefiveone

I assume in PCA club racing you're using something similar to a spec 944 setup? I wonder if that's the difference. I'm running 255's and stiff coilovers. 3.0L motor might be exposing the bushings to a lot more heat too.

I share that concern. I don't know of a delrin solution for the rear bushing on early a-arms. Would love to find one.

xschop

So no-one makes a Delrin rear Bushing?

DDP

Doesn't look that way. Does anyone know the diameter difference between the caster end of the aluminum arms and the steel arms?

xschop

The alloy arm caster pin is 19mm diameter (inside arm) and 18mm diameter that inserts into the block. I'm going to build a set of arms that include the caster pin mechanism, although I have seen many factory pin tab locations that all point down (zero caster) anyways. Having that 18mm dia. pin opens up many caster block options.

ninefiveone

Now you're talking! I'd be interested.

YZ250

Stock turbo power and weight with 245/275 tires and 550 lb springs.

ninefiveone

So I've got a little more tire in front, moderately more spring (700 lb), and a lot more power. Maybe just enough together to cause problems with the bushings.

xschop

I am also going to make them accept replaceable 17mm and 19mm Ball-joints but I'm still on the fence weather I will make a U-joint adapter bracket that allows for both the Early and Late offsets like the RX7 arms I modded or if I'll machine each set accordingly...Input?

95ONE

I also have these A arms in my shop. (And a hood on my roof. lol) But.. Those ball joints are really hanging out there. The RX7 Arms themselves are truly nice forged pieces.