Suspension Rebuild Help !

[Camoflash]

Hey all,
So i am planning on a complete overhaul of the suspension on my 300k mi 89 325is. I need help putting together the proper list of parts /bushings to achieve the most ideal settings for what i already have


So far:
17x7.5 BBS RC et 35 (205/40 bfg gforce)
IE3 Springs
Bilstein Sports
Controll arms
e30 m3 CABs
OE rubber Motor mounts
OE rubber Trans mounts
Tie rods
End links
Strut mount bearings
Sway Bar mounts

Need to buy:
Poly diff mount
polly rear trailing arm mounts
poly rear subframe mount
front camber plates
modify rear subframe with toe/camber correction kit

I need help figuring out which Rear Subframe bushings to buy and install. Ive definitely decided on getting poly (to forgo ever doing it again lol)
Being that i already have the ie3's, and wheel setup- am i missing anything?

Any input/advice would be much appreciated

Thanks

[Camoflash]

Also is reinforcement of the rear ens necessary?
Bigger sways?

[Van Westervelt]

If you already have new front strut mounts, you should probly hold off on buying camber plates unless you plan on spending time at the track.

Also, are you sure you want to install the IE3s? Most late model chaps dont like the result. I know I didnt.

No reinforcement is really needed in the back except for the sway bar mounts on the trailing arms and trunk floor, especially if you upgrade the bars and endlinks.

Why are you going rubber motor/trans mounts, and poly in the back? I would do all rubber, delrin, or poly (pick your poison). Ive never liked mixing it up with the mounts.

You will probably also want some spacers for those wheels, and maybe even a wheel stud kit. Once I started in the spacer game, wheel studs made like 10x easier.

[Camoflash]

Van- Thanks for the reply.
I had planned on wanting the camber plates so i that i am not prematurely wearing tires due to camber. I understand the late model guys didnt like the ie3's but from a stance point of view i plan on using the e90 drop hats to get rid of the reverse rake.

I have not purchased any sways yet but i do have a set of ST bars i can finagle from my brother.

As far as my choice of rubber on the trans/motor is because i had prematurely purchased them before doing some research about poly. I really dont want any added noises from the suspension but i do want the longevity and performance they bring. Motor and tranny mounts are easy enough to get to, but i want poly in the subframe for that reason- i never want to do it again lol



What size spacers would you recommend?
Is the rear toe/camber modifications for the subframe necessary for tire wear?
Will the e90 hats work with camber plates?
Can i forgo the adjustable camber plates for the fixed ones?

Sorry for all the questions.

Thanks again

[jlevie]

If you install the weld-in camber/toe plates I think that the OE rear trailing arm bushings are a better choice. They tolerate the axial mis-alignment better than poly when you adjust camber and toe.

If you are using the IE S3 springs for handling, you need to swap the sways for IE (or equal) 22/19mm sways, in which case you won't need the sway links but you will need to weld in reinforcements on the sway pick up points on the trailing arms.

17" wheels belong on an E36 or later. 15" wheels are the most that is appropriate for an E30.

[Camoflash]

jlevie- Ok so 22/19 sways with the weld in reinforcements and the softer trailing arm bushings for adjustment sake.

As far as the wheels go i would be using weaves with azenis for the go, and the 17''s for the show. I posed my questions with reference to the 17s to get the extreme side of the situation so that when i daily drive the car with the 17's i wont have issues. the 14's will be the autox/track set.


Will the weld in rear camber/toe plates, + a fixed front camber correction kit be enough for the ie3's (spring pad removal + front drop hat)?

Thanks

[KenC]

If it's a DD, stick with the rubber motor/trans mounts. The vibration from urethane/solid is unbearable unless it's a track car.

[tonywonder]

what do you mean by the rubber bushings tolerating better than poly? just easier to adjust or does the poly not function well with the C/T adjustments.

im also compiling a list of parts to purchase for my suspension build. but this is the first ive heard of this rubber vs poly for C/T adjust.

im getting treehouse racing CABs, and for the control arms and the tie rods im going with the lemforders. powerflex(street) for the bushings. waiting on the sways but plan on doing the weld on m3 sway tabs for the struts.

[Camoflash]

tony- i think what he meant was that the vibration from the engine running and moving around will not be resonated through the hard poly, instead cushioned by the softer oe rubber.


will front camber plates be necessary to achieve proper tire wear? I know the rear will need them but are the fronts?

[skurvydog]

also interested in poly vs. rubber rtabs for weld-in c/t adjustment. And if i need camber plates for the front to get maximum life out of my tires.