E30 Roll Centers

[nando]

they've disallowed the Internet Archive from showing that domain, it won't work for anyone

works for me?

Somebody should PDF the whole site in case it disappears for good.

[agent]

works for me?

Somebody should PDF the whole site in case it disappears for good.

I did. Some of the images are broken but I think I got all the pages.

Part 1:

[agent]

Part 2:

[lambo]

^ Beat me too it. I grabbed all the pages and doubled up on the non-broken images and links, just to be thorough.

I had been looking for an non-broken copy of the trailing arm geometry for the past few weeks... Guess my interneting skills are lacking.

https://drive.google.com/open?id=0B0vcza5E5r15U3ZHdUZLYktaYkE

.zip file for all the tech articles:

https://drive.google.com/open?id=0B0vcza5E5r15aUpJZXBma2xzY0E

[autox320]

thanks for bundling and link

really one of the best resources for these cars specifically

if interested there are a lot of material references on s14power forum as well ie some 1992 dtm specs and roll cage designs

some have taken the liberty to even duplicate these parts

[autox320]

^ Beat me too it. I grabbed all the pages and doubled up on the non-broken images and links, just to be thorough.

I had been looking for an non-broken copy of the trailing arm geometry for the past few weeks... Guess my interneting skills are lacking.

https://drive.google.com/open?id=0B0vcza5E5r15U3ZHdUZLYktaYkE

.zip file for all the tech articles:

https://drive.google.com/open?id=0B0...UpJZXBma2xzY0E

I've a pdf copy of the M3 GrpA manual if you'd like to add it to the archive somehow. It has some interesting tidbits in it even though once again S14 specific. Some suspension setup specs. Literally has the entire break down of service for the whole car. S14 peeps request emailing it all the time and not everyone has a copy. PM me an email address and I'd gladly contribute it.

[Digitalwave]

Just wanted to update this thread, since I got the car aligned with the new parts a few months ago.

With 12mm riser subframe bushings, H&R Race springs in the rear with 1 thick spring pad, and Bilstein Sport shocks, my rear camber was 1.4* on both sides. Hub center to fender lip height is 11.75" (late model rear arches). I don't remember how much toe, but it wasn't bad.

This was perfect as I am limited in front camber by the OEM size spring perch hitting the strut tower. I would like to run more camber all the way around down the road by switching to coilovers/2.25" diameter springs. In the mean time, the riser bushings taking camber out of the rear was a worth-while solution.

Regarding the roll center spacers in the front. I am running 16" Style 4's, and I went with 13mm spacers. I definitely have some room to spare. I think 19mm (3/4") spacers would have worked fine with these wheels, but 25mm (1") would have hit the wheel.

Overall I made too many other changes on the suspension at the same time to attribute it all to the roll center changes. Switched from 19/14.5mm sway bars to 22/19mm, SLR adjustable CABs, and from stock rubber to full Condor bushings. That said, it is a night and day difference on the track. The car rotates better, is more neutral, and has more overall traction than the previous setup did.

[nando]

That's awesome. I always though this was an under-appreciated modification. It's simpler than adjustable TA bushings and it doesn't come loose. I only stumbled on it because I found out ix bushings were taller than RWD bushings, and I had installed RWD IE bushings way back when H&R sports were "it".