Search found 60 matches

by bakemono
Sat Mar 09, 2024 11:14 pm
Forum: The Saloon
Topic: flaws of cheap M50 injectors
Replies: 0
Views: 77

flaws of cheap M50 injectors

Doing some work on the other car and noticed the #6 injector was leaky, so I went looking for a replacement. I considered buying one, but went with a full set of 6 'refurbished' injectors for the M50 because why not. I don't know who manufactures these ones with the light blue plastic and yellow pin...
by bakemono
Mon Mar 04, 2024 8:14 pm
Forum: Engine - Mechanical - Electrical
Topic: finally a dump of the 4-chip 633 motronic
Replies: 0
Views: 96

finally a dump of the 4-chip 633 motronic

Never saw a dump from these ECUs that use the four soldered ROM chips before. Now there is one. Not that it's terribly useful, but at least we can see the stock ignition maps I guess.

file: http://www.hyakushiki.net/misc/mdumpall.bin
blog post: http://www.hyakushiki.net/anachro.htm
by bakemono
Mon Feb 05, 2024 12:22 pm
Forum: Suspension - Steering - Brakes
Topic: e24 suspension components used on e30 for 5 lug swap
Replies: 4
Views: 683

Re: e24 suspension components used on e30 for 5 lug swap

The e28 and e24 suspension parts are generally the same. Actually I can't think of a single thing that is different, except when you compare different years. Not too sure about the e30 5-lug swap, but I heard you can take the e24/e28 front hub and put it on the e30 spindle. That might be the only re...
by bakemono
Sun Oct 22, 2023 11:52 am
Forum: Engine - Mechanical - Electrical
Topic: Differential questions
Replies: 2
Views: 610

Re: Differential questions

As you may know the e24 came in both 'e12-based' and later 'e28-based' varieties. '83 model year is in the 'e28-based' category so it can use a diff from an e28 5-series. In some cases the rear cover needs to be exchanged because of a different design used in some years. Generally a diff from a 6-cy...
by bakemono
Wed Oct 11, 2023 11:24 am
Forum: Suspension - Steering - Brakes
Topic: Bilstein shock bellows - how important?
Replies: 4
Views: 949

Re: Bilstein shock bellows - how important?

Well, I've just seen what the price is for new shocks these days and suddenly I have a different perspective. I'll definitely be looking for some kind of replacement! Maybe I'll add a cover to the rear shocks too. (Need to finish rebuilding the exhaust first...)
by bakemono
Mon Oct 02, 2023 12:50 am
Forum: Suspension - Steering - Brakes
Topic: Bilstein shock bellows - how important?
Replies: 4
Views: 949

Bilstein shock bellows - how important?

The plastic bellows protecting the front shocks are pretty well full of holes. (See pic:) http://www.hyakushiki.net/misc/bilstein.jpg Is it important for this type of shock to be sealed against water/debris getting in? Obviously there's a fair amount of labor involved in disassembling everything to ...
by bakemono
Mon Feb 13, 2023 7:14 pm
Forum: Engine - Mechanical - Electrical
Topic: Performance Chip/Modest Engine Mods for 83' 633 CSI
Replies: 4
Views: 927

Re: Performance Chip/Modest Engine Mods for 83' 633 CSI

When I got the head resurfaced (shaved .010") and put in a B35 cam, the dyno showed +5 HP and +7 torque. Piston to valve clearance was fairly tight but it has been eight years and I haven't had a problem.
by bakemono
Mon Feb 13, 2023 6:43 pm
Forum: Engine - Mechanical - Electrical
Topic: Repetitive ECU break down
Replies: 1
Views: 596

Re: Repetitive ECU break down

This sounds like an unusual problem. Any update? I am wondering if they already checked that the system voltage is not excessive and the waveform does not have excessive ripple. Since you mentioned crankshaft position sensors, I gather that the ignition is also controlled by the ECU on this model (i...
by bakemono
Sun Feb 21, 2021 2:48 pm
Forum: Engine - Mechanical - Electrical
Topic: E30 Harness on E24
Replies: 3
Views: 1393

Re: E30 Harness on E24

Could it be an e30 Motronic 1.1/1.3 harness combined with an M30B35 ecu from an e34? It's been a while but I recall that it was possible to mix and match some of these things. Does the car come with the original harness? Or a Megasquirt ecu for that matter, depending on whether you want to go ahead ...
by bakemono
Sat Jul 18, 2020 5:16 pm
Forum: Engine - Mechanical - Electrical
Topic: Shrick 284/280 Cam in M30B35
Replies: 15
Views: 6370

Re: Shrick 284/280 Cam in M30B35

New pistons is a can of worms, as you need to disassemble the whole block and re-hone the cylinder bores at the least. However I'm sure there are vendors offering high-comp pistons specifically for a B35 with valve reliefs already taken into account.
by bakemono
Fri Jul 17, 2020 3:51 pm
Forum: Engine - Mechanical - Electrical
Topic: Shrick 284/280 Cam in M30B35
Replies: 15
Views: 6370

Re: Shrick 284/280 Cam in M30B35

Sadly, you can't gain all that much compression just by shaving the head. Shaving it .010" only gets you about one tenth of a point. I wouldn't try shaving it .020" without measuring piston-to-valve clearance first.
by bakemono
Wed Jul 15, 2020 3:28 pm
Forum: Engine - Mechanical - Electrical
Topic: Shrick 284/280 Cam in M30B35
Replies: 15
Views: 6370

Re: Shrick 284/280 Cam in M30B35

The Shrick compared to the B35 is essentially the same duration but more lift, according to this chart (attachment)

On its own, should be worth a modest boost in the midrange.
by bakemono
Mon Jul 13, 2020 1:38 pm
Forum: Engine - Mechanical - Electrical
Topic: Mysterious non start problem
Replies: 25
Views: 8883

Re: Mysterious non start problem

Hopefully someone who knows well the electricals on later cars can answer, but I think autos have a relay under the dash which delivers power to the starter solenoid. I would look there.
by bakemono
Mon Jul 13, 2020 1:34 pm
Forum: Engine - Mechanical - Electrical
Topic: Driveshaft?
Replies: 9
Views: 3814

Re: Driveshaft?

A few thoughts: I would say driveshaft problems usually result in a thumping or clunking sound. I did have a noisy center bearing once, but I would describe it as more of a grinding than squealing. You should be able to easily see the guibo just by raising the car. I expect that labor cost for repla...
by bakemono
Sat Jul 11, 2020 2:04 pm
Forum: Engine - Mechanical - Electrical
Topic: Mysterious non start problem
Replies: 25
Views: 8883

Re: Mysterious non start problem

What happens when it doesn't start? Does it still crank? Does the solenoid click?
by bakemono
Fri Jul 10, 2020 10:39 am
Forum: Engine - Mechanical - Electrical
Topic: 635CSi hesitates
Replies: 28
Views: 8870

Re: 635CSi hesitates

It's normal for fuel pressure to be lower at idle. The regulator is designed to hold pressure constant relative to manifold pressure, that's what the small vacuum hose is for. Manifold pressure is ~.5 bar lower at idle. If you had a problem with fuel flow it would show up under high load, ie. when f...
by bakemono
Wed Jul 08, 2020 8:27 am
Forum: Engine - Mechanical - Electrical
Topic: 635CSi hesitates
Replies: 28
Views: 8870

Re: 635CSi hesitates

I'm trying to imagine a scenario where the battery light comes on with the engine still spinning and it also causes loss of power. If it was just failing alternator brushes or a slipping belt I wouldn't expect the engine to hesitate. Could it be a bad connection on the back of the alternator? Or a s...
by bakemono
Wed Jun 10, 2020 10:32 am
Forum: Engine - Mechanical - Electrical
Topic: M30B35 compression pressure
Replies: 3
Views: 2889

Re: M30B35 compression pressure

14.7 stp x 9= 132.3 psi, or thereabout. Calculating what the number should be according to physics is actually a lot trickier than that. On the one hand, some of the air can slip back out the intake valve after BDC so you don't get the full volume. But on the other hand, compressed air also heats u...
by bakemono
Tue Jun 09, 2020 11:34 am
Forum: Engine - Mechanical - Electrical
Topic: M30B35 compression pressure
Replies: 3
Views: 2889

Re: M30B35 compression pressure

I don't know the official number but with 9:1 compression ratio I would expect something around 160psi
by bakemono
Sat Mar 07, 2020 4:35 am
Forum: Engine - Mechanical - Electrical
Topic: Clutch time + ??
Replies: 12
Views: 7957

Re: Clutch time + ??

Might be a good time to do the guibo/giubo/flexdisc and the transmission mounts if the rubber is showing any signs of coming apart. There are several parts in the shift linkage, and the more of them that you replace the better it gets. See this page: https://www.realoem.com/bmw/enUS/showparts?id=527...
by bakemono
Tue Feb 11, 2020 10:03 am
Forum: Engine - Mechanical - Electrical
Topic: Engine Flooding when turned over 1988 m6
Replies: 3
Views: 3178

Re: Engine Flooding when turned over 1988 m6

Could be a bad temp sensor causing the ECU to inject too much fuel. Or injectors leaking. Just a couple of ideas.

Does the M6 have a cold-start valve? That could be another culprit.
by bakemono
Tue Feb 04, 2020 3:26 am
Forum: Engine - Mechanical - Electrical
Topic: 1982 633CSI - Engine Locked up from sitting
Replies: 20
Views: 11201

Re: 1982 633CSI - Engine Locked up from sitting

hard to see but it looks more like carbon buildup than rust, maybe it will come clean. The trick would be doing it without scratching the metal too much. Get a toothbrush and a good solvent...
by bakemono
Fri Jan 24, 2020 9:41 pm
Forum: Engine - Mechanical - Electrical
Topic: Ignition upgrade?
Replies: 2
Views: 2653

Re: Ignition upgrade?

This is another one of those things I used to know but now my memory is foggy and it's hard to find the information again. This is a picture of a rotor adaptor from a 3.2, but I think they had one with a different key also that would not interchange.
Image
by bakemono
Fri Jan 24, 2020 2:15 pm
Forum: Engine - Mechanical - Electrical
Topic: 1982 633CSI - Engine Locked up from sitting
Replies: 20
Views: 11201

Re: 1982 633CSI - Engine Locked up from sitting

Thank you. Can I drop the pan with the subframe in the car? I'm not sure about this. I seem to remember that on an M20 I managed to sneak the pan out by strategically turning the crankshaft to avoid hitting the counterweights on the way out. Since yours won't turn you would need more clearance. Unb...
by bakemono
Tue Jan 21, 2020 12:50 pm
Forum: Engine - Mechanical - Electrical
Topic: 1982 633CSI - Engine Locked up from sitting
Replies: 20
Views: 11201

Re: 1982 633CSI - Engine Locked up from sitting

Never encountered this problem before but my first move would be to pull the valve cover and see how the top end looks. The valve train and chain could surely benefit from lubrication although that may not be enough to get the engine freed up. Next up would be dropping the oil pan.