US M30b32 with M90 head

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quadrajet
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Joined: Thu Apr 18, 2019 5:33 am
Location: NW WA

US M30b32 with M90 head

Post by quadrajet »

Hello all! I'm parting a Euro 79 635csi and after researching, here especially, I've found that the bottom end has been swapped from the M90 to an to a US 84 633 M30b32.
I'm curious if anyone has done this before and what kind of numbers this would put out?
I've come over from E30s where there's relatively few M30 swaps as compared to M50 series swapping.
89 635CSI, 91 318is, 91 318ic, 99 525iT(84 325e, 85 325e, 87 325is,91 325i, 88 325, 86 325e, 3-91 318is, 88 535is, 84 633csi, 86 528i Euro, 97 528i, 98 528i, 98 318ti, 99 525i past vehicles)
bpoliakoff
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Re: US M30b32 with M90 head

Post by bpoliakoff »

Basically the same head
81 Euro 635 M90 with motronic. Currently under a complete nut and bolt restoration. Pictures at
flickr.com/photos/bertsphotos.
bpoliakoff
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Re: US M30b32 with M90 head

Post by bpoliakoff »

Basically the same head
bpoliakoff wrote: Sat Aug 24, 2019 11:34 pm Basically the same head No increase
81 Euro 635 M90 with motronic. Currently under a complete nut and bolt restoration. Pictures at
flickr.com/photos/bertsphotos.
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tschultz
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Re: US M30b32 with M90 head

Post by tschultz »

The cam will likely be the less duration head so it will actually be a downgrade. The early 533/633 had the better cam and lighter flywheel.
http://www.Drive4Corners.com
Image
'79 635CSi Revival
'80 635CSi
'83 633CSi Callaway Turbo continued as 1988 535is Turbo
SOLD: '81 635CSi/A
quadrajet
Posts: 9
Joined: Thu Apr 18, 2019 5:33 am
Location: NW WA

Re: US M30b32 with M90 head

Post by quadrajet »

Thanks for the info tschultz!
89 635CSI, 91 318is, 91 318ic, 99 525iT(84 325e, 85 325e, 87 325is,91 325i, 88 325, 86 325e, 3-91 318is, 88 535is, 84 633csi, 86 528i Euro, 97 528i, 98 528i, 98 318ti, 99 525i past vehicles)
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