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1990 Diamantschwarz 325IX 4dr
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Looks great! I can't imagine there's a whole lot of E30s, much less IX's, in Argentina!
Originally posted by D.Martijn View PostWhen you use regular 325i subframe and diff bushings, what changes?
Do you need to readjust the height? I never understood this fully
Using shorter bushings raises the subframe relative to the car. The ix subframe itself is the same - it only has a different part # because it comes with ix-specific bushings pressed in.
Basically the RWD subframe bushings are good for a bit less than 1/2 degree of negative camber on an IX - enough to take you from bad inner tire wear, to acceptable. Plus many of the aftermarket adjustment kits are prone to slipping (Kmac) or effective but a pain to install (IE).
I discovered this back in the day 100% by accident (16 years ago! fuuu!!!) - since I installed IE subframe bushings, which are of course RWD height. I don't think I even realized the difference for at least 5 years after that.
BTW, I still have those bushings... IE has gotten heck for lots of things, but those are still good as new. In fact I tried to replace them once but they were stuck in there, and they were still fine - so Eff it..
oh, you also have to account for the diff bushing - the ix bushing is offset to account for the extra height of the IX subframe bushings. In my case, I got an E36 M-coupe diff cover back when you could buy them on grocery store janitor wages, which matches the height of the RWD bushings. Otherwise, there's potential to have pinion angle issues - although I have never had a problem and my IX has 280,000 billion mile now..Last edited by nando; 11-20-2018, 11:16 PM.
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Originally posted by nando View PostLooks great! I can't imagine there's a whole lot of E30s, much less IX's, in Argentina!
OK, think about it like this - the subframe is part of the body of the car. Lower the car, and you gain negative camber (due to the slight angle between the trailing arms and subframe). Raise the subframe up, and you lose some camber (just like if you raised the car back up a bit).
Using shorter bushings raises the subframe relative to the car. The ix subframe itself is the same - it only has a different part # because it comes with ix-specific bushings pressed in.
Basically the RWD subframe bushings are good for a bit less than 1/2 degree of negative camber on an IX - enough to take you from bad inner tire wear, to acceptable. Plus many of the aftermarket adjustment kits are prone to slipping (Kmac) or effective but a pain to install (IE).
I discovered this back in the day 100% by accident (16 years ago! fuuu!!!) - since I installed IE subframe bushings, which are of course RWD height. I don't think I even realized the difference for at least 5 years after that.
BTW, I still have those bushings... IE has gotten heck for lots of things, but those are still good as new. In fact I tried to replace them once but they were stuck in there, and they were still fine - so Eff it..
oh, you also have to account for the diff bushing - the ix bushing is offset to account for the extra height of the IX subframe bushings. In my case, I got an E36 M-coupe diff cover back when you could buy them on grocery store janitor wages, which matches the height of the RWD bushings. Otherwise, there's potential to have pinion angle issues - although I have never had a problem and my IX has 280,000 billion mile now..
I am using stock springs though, might not be interesting to use regular 325i bushings?
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