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E46 m3 differential upgrade
E46 m3 differential upgrade












e46 m3 differential upgrade

The spindles are a direct bolt-on.Į36 M3 front: 315mm x 28mm vented rotor E36 M3 rear: 312mm x 20mm vented rotor E36 325/328 front: 286mm x 22mm vented rotor E36 325/328 rear: 280mm x 10mm solid rotor The E36 325 and 328 brakes are identical and completely interchangeable with each other. You can use E36 M3 brakes, if you buy E36 M3 spindles. OK, let's get this out of the way first: no, E36 M3 brakes will not bolt on to your 325/328. See where Matt spews all kinds of stuff about reinforcing the E36 chassis. And although there are holes in the control arm, none of them are intended for mounting a sway bar link to! While there is a weight savings of about 8lbs per arm, half of this weight lies parallel to the centerline of the car on the arm's pivot axis. The ball joints don't seem to last as long. Somebody take some measurements so we can talk about the plan view!Īluminum control arms from the later year E30 M3s is an often-talked about "upgrade", although maybe not so commonly performed.

e46 m3 differential upgrade

This arm is intended for use with a centered control arm bushing to achieve the same static caster as the 95 M3 arm+ bushing combination. The inner ball joint and rear of the "boomerang" are the same, but the outer ball joint is moved forward approximately 10mm. The 96+ M3 uses an arm with slightly different geometry. On the 95 M3, like the E30 M3, the mounting bushing is offset away from the chassis centerline (I have no measurements to tell me if this is increasing or decreasing the - anybody?), which in turn moves the outer ball joint further foward, increasing static caster.

e46 m3 differential upgrade

The 95 M3 control arm has the exact same geometry as the rest of the E36 non-M3 line (and the E30 M3). Unfortunately, on the non-M3 arms, the ball joint is replaceable on the M3, the whole arm must be replaced.ĩ5 M3 and 96+ M3 stock caster specs are within the same range, but they accomplish it different ways. Also, M3 arms have proven to have higher quality ball joints than the non-M3 arms. The E36 front control arm arrangement is simple: there is an outer ball joint an inner ball joint that bolts to the subframe (you could call it an I-member, if you wanted to carry over some Mustang-speak) and the rear of the arm presses into a bushing, which is itself pressed into a "lollipop" that bolts to the chassis (not to a subframe).Īll M3s use solid bushings at the rear of the control arm, unlike the non-M3 lineup. The outer ball joint on the E30 control arm is not rubber mounted or replaceable. E30 front control arms, bushings, and tie rods will fit the E36 chassis. Installing these mounts on the wrong side of the car gives a nice increase in negative camber, but net caster causes a very noticeable increase in steering effort. 95 M3s use an upper strut mount that is identical from left to right - same part number. 23mm solid front, up from 22.5mm, and 20mm solid rear, up from 19mm. 96+ M3s have bigger sta-bars than the 95s.

#E46 m3 differential upgrade upgrade#

To upgrade the suspension on one of these early cars, you need to do the whole package including sta-bars (due to the width of the stock bar relative to the control arm mounting locations), but that package can be intended for any E36.Ī complete E36 M3 take-off suspension will fit any other year E36. Also, the swaybar attaches to the strut body with a droplink, which is how it is configured on all E36 M3s, rather than to the control arm, as it does on all other E36s. The 1992 325i/325is built before June of '92 use all the same front suspension mounting locations as the later cars, but the struts, spring diameters, and strut mounts are all a little different. At the bottom, non-M3 springs are a significantly larger diameter, so it follows that the lower spring perches welded onto non-M3 struts are too big for M3 springs.įrom this, you can conclude that any M3 spring will fit any M3 strut, with the appropriate upper perch.Īs far as the "early" 1992 325s. The 1996+ M3s have a slightly smaller upper perch. At the top, stock E36 and 95 M3s have the same diameter upper spring perch (although the part number is different). Then the issue becomes spring perch diameters. Second, there is no reason for 95 M3 aftermarket parts to be different from 96+ M3 aftermarket parts, unless you are looking to mix and match. This is crap.įirst, be aware that all E36 coupes and sedans have the same chassis mounting points.

e46 m3 differential upgrade

1 for the 95 M3, 1 for the 96+ M3, and 1 for all other E36s built after 6/92. One of the first things you may notice: most parts catalogs list shocks/springs/struts for the E36 with 3 different fitments.














E46 m3 differential upgrade