I Need Your Suspension Advice , Can You Help ??

[TobyB]

Will,
do you have a roll center diagram for the front kicking around anywhere?

t

[MX339]

Will,
do you have a roll center diagram for the front kicking around anywhere?

t

I assume you're looking for a more detailed/E30 specific diagram, Toby, but here's a basic roll center diagram for those of you who don't quite understand it.



The accompanying article is located here: http://web.archive.org/web/200712300..._transfer2.htm

[BlackbirdM3]

I assume you're looking for a more detailed/E30 specific diagram, Toby, but here's a basic roll center diagram for those of you who don't quite understand it.



The accompanying article is located here: http://web.archive.org/web/200712300..._transfer2.htm

Thanks for finding that. Nope, I don't have a diagram, but that one will work nicely. I've been looking for the archived version of Gustav's site. Lots of good info on there.

Will

[TobyB]

Thanks, yes,
that's about what I was thinking of.

I get in mental trouble switching between the 2002 and the E30,
because they're not exactly the same... but similar...

t

[ajackz]

Ping for later reading.

[MX339]

Thanks for finding that. Nope, I don't have a diagram, but that one will work nicely. I've been looking for the archived version of Gustav's site. Lots of good info on there.

Will

It spooked me a bit when the old site went down a few weeks ago, but the guys on S14 had an archived link. I know I'm still getting plenty of use out of it.

Thanks, yes,
that's about what I was thinking of.

I get in mental trouble switching between the 2002 and the E30,
because they're not exactly the same... but similar...

t

The properties of the roll center shouldn't be any different on our 02's, they're both McPherson anyhow (E30's and 02's that is).

What I tend do to is just think of the 2002 front suspension being backwards of the E30's. You've got the radius rod in the front of the 02's subframe while the steering linkage is behind it. While the E30's are the other way around, even though the control arm is pulling double duty acting as the radius rod too.