TTsf
Member
have an opportunity to purchase a rear subframe off a 1989 535is will this fit on an E9 coupe? and does any know the dimensions from bolt to bolt of the E9 coupe? thanks
terry
terry
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1989 535is subframe will this fit?
- Thread starter TTsf
- Start date
x_atlas0
Well-Known Member
I don't think the E34 frame will fit, as its dimensions are different from the E28 frame, which is the one that does fit.
Malc
Well-Known Member
Although an E28 rear frame will fit E28 trailing arms are different especially the m535 and the m5 ones
It's to do with the way the springs and shocks are mounted
Malc
It's to do with the way the springs and shocks are mounted
Malc
TTsf
Member
thats what i thought. thanks for the information from the both of you.
so how is the swap accomplished then? I always wondered about a modified car, with an E28 rear carrier to support the massive M5/M6/turbo E23 final drive, and while at it install the turbo E23 motor with a 5-sp OD. oomph, plus a bit of possible actual mileage on the freeway with the OD and the 2.93 diff?Malc said:Although an E28 rear frame will fit E28 trailing arms are different especially the m535 and the m5 ones
It's to do with the way the springs and shocks are mounted
Malc
Malc
Well-Known Member
DP
I concidered this swap when my 1986 E28 M535 died.
The M535 used shock/spring style struts or coil overs for the rear suspension. so the pickup points on the arms, plus the top mounts are different to the E9. Just to add to the whole thing the way the rear brake calipers, differential, and trailing arms are mounted is different so you cannot simply swap components about.
So I would of had to do the following
1.. Cut out the E9 rear diff mounting point. Fabricate /add M535 mount, reinforce as required.
2.. Cut out the M535 rear spring strut top mounts, maybe the whole inner part of the inner wheel housings.
3.. cut out E9 inner wheel arch spring and top shock mounts.
4.. Weld inner top mounts or whole inner arch into the E9 body.
5.. Mount whole M535 rear assembly including driveshafts etc
6.. Modify E9 prop shaft to suit.
only six steps, but a lot of work to ensure it's safe and solid :roll: There are other things to consider including, but not limited to
1.. Route of exhaust
2.. brake lines
3.. handbrake (parking brake) cables
4.. Fuel lines, pump position
5.. Fuel tank (maybe)
6.. The rear track (width) of the assembled M535 rear suspension is wider than a standard E9 set up (I think)
In the end I didn't do it but this is what I think I was going to have to do. Please note this reffers to a 1986 E28 M535 that I had. Other models of E28, including the M5, may be different.
Speaking of which I saw a lovely E28 M5 this weekend, a car I would happily have!
Malc
I concidered this swap when my 1986 E28 M535 died.
The M535 used shock/spring style struts or coil overs for the rear suspension. so the pickup points on the arms, plus the top mounts are different to the E9. Just to add to the whole thing the way the rear brake calipers, differential, and trailing arms are mounted is different so you cannot simply swap components about.
So I would of had to do the following
1.. Cut out the E9 rear diff mounting point. Fabricate /add M535 mount, reinforce as required.
2.. Cut out the M535 rear spring strut top mounts, maybe the whole inner part of the inner wheel housings.
3.. cut out E9 inner wheel arch spring and top shock mounts.
4.. Weld inner top mounts or whole inner arch into the E9 body.
5.. Mount whole M535 rear assembly including driveshafts etc
6.. Modify E9 prop shaft to suit.
only six steps, but a lot of work to ensure it's safe and solid :roll: There are other things to consider including, but not limited to
1.. Route of exhaust
2.. brake lines
3.. handbrake (parking brake) cables
4.. Fuel lines, pump position
5.. Fuel tank (maybe)
6.. The rear track (width) of the assembled M535 rear suspension is wider than a standard E9 set up (I think)
In the end I didn't do it but this is what I think I was going to have to do. Please note this reffers to a 1986 E28 M535 that I had. Other models of E28, including the M5, may be different.
Speaking of which I saw a lovely E28 M5 this weekend, a car I would happily have!
Malc