Hey guys. This build has been in the works for the last 5 months or so and is still ongoing. Decided to build myself an M50B30 stroker from an M50B25NV. Why an NV? Well.... I already had one and my 92 525 is already an NV so why not.... Basis is M50 everything except for M54B30 Crank, Pistons, Rods m52 21.5lb pinkie injectors, supporting software etc etc. Relatively "well known" swap to get a cheap "S50 Clone" So I picked up a rotating assy from a local bmw guy from and got the ball rolling.
The doner: 10/91 MY 92 E34 Auto Sedan. 110k miles
Yoink
Spare ZF320 I snagged for $100 in the back. Has 95k ish miles
Taking head down
Blue alloy pad on a little grinder works wonders
Engine rebuild in a can
Home "hone" job. Bores were in good shape, just needed cleaned up
Ready for bearings. Got QC to sign off
finding bearings for this was a PITA. I needed a certain style and very few sellers actually knew what they had. Ended up getting some from ECS Tuning. Worked great
Measured crank before ordering bearings. Crank was in excellent shape. Makes sense since assy had 50k miles. Plastigauged with new bearings and was spot on. Torqued with new 10.9 grade bolts from Mc.Master Carr. Can't be worse than reusing the old
Difference of M50NV rod/piston and M54B30 rod/piston. M54 top
Was cleaning the rods and something wasn't right..... Bent Rod!! Got with seller and he fedex'd me two replacements. Top Notch guy.
Setup for my "polish" job.
That's it for now, stay tuned!
Last edited by S61Dan; 10-10-2016 at 08:38 PM.
Sick! I was thinking about something like this when I'm sick of my Touring. Are you adding boost and I missed it? Tuned in!
As of right now, no. This is a daily and I drive 300 miles a week. I want to keep it pretty mild.
Sweet!
1995 540i/6
2017 Hellcat Charger
very cool. can't wait to see the finished product
Nice!
02 e39 540i Sport (Son), 01 DINAN 7 (Me), 12 e70 X5 x35i (Mrs), 95 e34 525i (Daughter 2), 01 e46 325Ci vert (Daughter 1)
So, I did some more work on this build. Spare time is few and far between! Got the head 99% complete. Got valves all done, aside from the one that I still need a retainer for... Also, worked on the bottom end a little bit, got the piston rings sorted, and got the pistons/rods installed. Very happy to get the rotating stuff done.
Man, this is good stuff! Subbed.
Cool to see, Dan. More torque in this chassis ist gude.
Did some small things on this build recently over the holiday break. Cleaned and sorted a lot of hardware/ engine components. My Dad is building an M54B30 for his E39 530 sport atm so there is engine parts everywhere! Managed to clean, check torque on the pump nut and weld it to prevent it from backing off. Installed the pump and chain as well. Ordered new timing guides/tensioners since I really should anyway so waiting on them.
More to come
This is awesome! Definitely in for updates What a nice surprise to see how much smaller those M54 pistons are over their predecessors. So you will effectively end up with a non-vanos M54B30 running OBDI eh? Similar to what some of the 7 and 8 series guys do with the V12's
Curious about your dad's build M54 as well. What's going on there?
"Big Red" 9/88 Build 535i/5: E.A.T. Chip, 24lb Bosch Design III, 3.46 LSD, 4x Clear corners, DINAN-style 750i muffler, Racing King Subframe Inserts, Koni/Vogtland suspension, E34 M5 swaybars, Brembo/Porterfield brakes, Turbodiesel grills, 16" Style 8 rims, Euro front plate, M5 rear filler plate.SaveSave
Ehhh it's more of an s50b30 only NV. I will be running Miller WAR to tune it. The M54b30 for the E39 is just a rebuild. The HG blew and being an M54 it destroyed the threads for the headbolts in the block. He used Timeserts to repair it and is just about ready to drop it in. Car has 100k on it and is retarded clean
My favorite kind of thread. Frankensteining engines and doing it by yourself at home is always the coolest thread.
Current Fleet:
E34 1991 M5 Macaoblau on Complete (ruined)Leather Champagne - http://forums.bimmerforums.com/forum....php?t=1705166
Past:
E34 1989 535i 5-Speed AlpineweissII on Natur - Parted
E34 1992 525i 5-Speed Islandgrun on Pergament - Parted
E34 1995 540i 6-Speed ShwarzII on Shwarz - Sold to Sneezy.
E34 1995 525i 5-Speed Calypso Red on Parchment - http://forums.bimmerforums.com/forum....php?t=1748143 - Sold locally.
E39 1998 528i 5-Speed Black on Black - Sold locally.
E34 1993 M5 Alpinweiss on Black - http://forums.bimmerforums.com/forum...lpinweissII-M5 - Parted
Very cool.
95 540i6 M Sport - 95 525it S52/OBD2 - 433k E36 328i5 - X5D that hit a pothole - IG: @justinmurray95
Last edited by S61Dan; 01-01-2017 at 06:42 PM.
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