I know, search search search. Did I spell that right ?? Anyhow If I'd like to install some H&r sport springs, how much will my caster/camber be off ?? Will it be within specs or will I have to get some m3 cab's and get technical with the rear end ?? Ive got the front end torn apart and waiting for new control arms, stock cab's ect. Kinda dont want to spend the money on shocks and springs, but while Ive got eveything torn apart, may as well. I guess to sum it up......can I just install the springs and shocks and walk away with out having to modify anything else ??:???:
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?'s about sport springs/ camber specs
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The rule of thumb is a 30mm drop is the limit before you need to facilitate adjustment for Camber, Caster (and Toe in the rear). H&R Sports will put it just about right there (be extra sure that you get the correct set for the application).
On another note: Offset LCABS Require more changes than most everyone seems to know about. Not really the greatest idea on a "street" e30.
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m3 CABs wont fix camber fyi, get them anyway thoughYour signature picture has been removed since it contained the Photobucket "upgrade your account" image.
Originally posted by TimKninjaIm more afraid of this thread turning into one of those classic R3v moments, where Pizza gets delivered.
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Originally posted by DCColegrove View PostOn another note: Offset LCABS Require more changes than most everyone seems to know about. Not really the greatest idea on a "street" e30.
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Originally posted by FredK View PostThe only thing I could possibly see is that it reduces straight line stability. I experienced this in my E36, but after I got an alignment with reasonable toe in it disappeared.
spring springs
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Originally posted by DCColegrove View Postoffset LCABS toss the arms forward in an e30 it gives you more + caster but also changes the rack geometry, the included angle and scrub radius those things should be addressed (they are on the M3 chassis...different ball game):: PNW Crew ::
'87 325 4dr, '74 2002
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Originally posted by backtrail69 View PostExplain to me why an m3 rack, m3 tie rods, subframe, struts and control arms all work on regular e30s... oh thats right its the SAME car.. in the rear the only thing different is the hubs and brakes...
True However, when you swap all of that on to an e30 (and move the rack into the forward bosses in the sub frame) it works pretty well.
You see, I was at BMW AG and NA (about '82 to '91) when all that shit was being worked out. It was my job to tell Engeneering when and how they screwed up.
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you are right, it does affect those things - but I doubt you would even be able to tell any difference. it's not like it moves the wheel center 5" forward or something. it's like a 1.5 degree change. And for me, the real benefit is dynamic camber - since the ix has so little caster, this makes a big difference on the outside wheel in a corner.
seriously though, if you're going to say don't use offset CABs because it messes with suspension geometry - you should also say don't lower your car, put stiffer springs on it, camber/caster plates, wider tires with lower offset wheels, etc. etc. because ALL of these things affect the suspension geometry, and in most cases for E30s it's not in a positive manner. But we still do it anyway because the benefits outweigh the drawbacks.
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