Search found 173 matches

by Lock
Tue Oct 22, 2019 12:58 am
Forum: Tech Forum
Topic: Motronic 1.3 conversion
Replies: 23
Views: 587

Re: Motronic 1.3 conversion

I'll jump straight to it - It lives! A video: https://www.flickr.com/photos/87580745@N02/48939571558/ And another. that's not a stumble - I gave it a bit, and then a bit more https://www.flickr.com/photos/87580745@N02/48939671698/ Life got in the way this month, but last weekend I spend most of the ...
by Lock
Tue Oct 22, 2019 12:11 am
Forum: Tech Forum
Topic: Heater hose replacement options
Replies: 0
Views: 3

Heater hose replacement options

Wanted to make an easy to find post about heater hose options. https://live.staticflickr.com/65535/48825055567_5d0e9a1990_c.jpg The steel heater hose tube under the manifold is likely rusty after 40 years even in a well-maintained car, as of Oct 2019 they list at around $250. I've found a reasonable...
by Lock
Mon Oct 21, 2019 10:33 pm
Forum: Tech Forum
Topic: Oil Pressure Light Always On
Replies: 1
Views: 24

Re: Oil Pressure Light Always On

Do you also have the "oxygen sensor" light in the middle cluster above the center vents? The oil pressure signal is also connected to that, so that it comes on to test. That wire comes out from on the firewall near the pedal assembly and down under the drivers side frame rail to the counter box. It ...
by Lock
Wed Oct 09, 2019 11:30 pm
Forum: Tech Forum
Topic: Motronic 1.3 conversion
Replies: 23
Views: 587

Re: Motronic 1.3 conversion

It looks like the pictures Joe posted feature the E21 runners with an elegant bracket for the FPR. I was going to say I cleaned my engine a little while it was apart, but that one looks amazing and show-worthy. I'm just bashing things into shape with a rock over here by comparison. Currently I'm wo...
by Lock
Wed Oct 09, 2019 11:03 pm
Forum: Tech Forum
Topic: Oil Pump piston and compression spring
Replies: 4
Views: 65

Re: Oil Pump piston and compression spring

I took a look at the oil pump I removed from the M30B35 I had, and it's identical to the picture Joe posted. So you're right it's probably a technical update and your book is showing early pumps.
by Lock
Thu Oct 03, 2019 11:19 pm
Forum: Tech Forum
Topic: Motronic 1.3 conversion
Replies: 23
Views: 587

Re: Motronic 1.3 conversion

I think I read that at the fuel rail at 6000 rpm, something like 15 g of fuel per second is consumed, which is less than 20 ml or 2/3 oz. The volume of the whole fuel system from the pump forward is way bigger than that and at 40 psi the delta P should be really small anywhere in the system. Maybe ...
by Lock
Thu Oct 03, 2019 11:06 pm
Forum: Tech Forum
Topic: Sticky front right brake
Replies: 5
Views: 110

Re: Sticky front right brake

My car had the original flexible brake lines on it. You can tell because there will be a ring with the year on it in my case "79". I read that they can look okay from the outside but collapse on the inside so I replaced mine. It's a no regrets move, definitely firmer pedal feel and you'll bleed the ...
by Lock
Thu Oct 03, 2019 3:59 pm
Forum: Tech Forum
Topic: Motronic 1.3 conversion
Replies: 23
Views: 587

Re: Motronic 1.3 conversion

Thanks everyone, I know this has been done before but it's enjoyable. Joe you mentioned the e21 intake runners which sounds like you have, I'm guessing they are longer which moves the torque curve down. Have you noticed any tradeoff on the top end? I was also looking at the Megasquirt, but as I have...
by Lock
Tue Oct 01, 2019 12:32 pm
Forum: Tech Forum
Topic: 77 E12 motor into a 77 630SI
Replies: 3
Views: 36

Re: 77 E12 motor into a 77 630SI

From what I've read you can swap the engine directly just fine. Take a look at the labels on the ECUs, they should be identical as the years are the same. If they're different (either number, color, or both) you can swap them out, but because it's all analog it wouldn't make a noticeable difference ...
by Lock
Tue Oct 01, 2019 12:51 am
Forum: Tech Forum
Topic: Motronic 1.3 conversion
Replies: 23
Views: 587

Re: Motronic 1.3 conversion

It was a cold weekend in my unheated garage but made progress. Started by cleaning the bananas before removing all of the sealant that PO had used instead of gaskets. Major difference after some light scrubbing. https://live.staticflickr.com/65535/48824531373_d4c1f11b70_c.jpg I had some 8mm hose fro...
by Lock
Mon Sep 23, 2019 6:21 pm
Forum: Tech Forum
Topic: Motronic 1.3 conversion
Replies: 23
Views: 587

Re: Motronic 1.3 conversion

Thanks guys. I was considering a plug on the end of the rail, but I got used to the convenience of a fuel pressure gauge for diagnostics. I actually bought a pack of adapters because I didn't know what size it was (turns out it is M14 coarse thread). And as for the 88 528e wiring harness - I didn't ...
by Lock
Sun Sep 22, 2019 11:52 pm
Forum: Tech Forum
Topic: Motronic 1.3 conversion
Replies: 23
Views: 587

Re: Motronic 1.3 conversion

Quick update Idle speed controller test fit, purge valve mounting. The original PCV hose was the perfect adapter size for the larger Motronic piping size so ordered a new one for this purpose. https://live.staticflickr.com/65535/48762863318_57204f6e8a_c.jpg Installing the injector top hats https://l...
by Lock
Tue Sep 17, 2019 1:09 am
Forum: Tech Forum
Topic: Motronic 1.3 conversion
Replies: 23
Views: 587

Re: Motronic 1.3 conversion

Mounting the Motronic engine speed/position sensor took some planning as the AC compressor blocks it. Turns out the Motronic harmonic balancer fits with the original bracket which left me with a choice. I could either cut the oem AC bracket, or vacuum the lines, remove the compressor and (after fixi...
by Lock
Tue Sep 17, 2019 12:27 am
Forum: Tech Forum
Topic: Motronic 1.3 conversion
Replies: 23
Views: 587

Re: Motronic 1.3 conversion

Thanks. The log manifold is classic and I didn't really want to ditch it. Adds a bit more complexity but not as much as I thought and keeps it looking classic.
It also keeps the rod throttle linkage which I really like the feel of.
by Lock
Fri Sep 06, 2019 12:31 am
Forum: Tech Forum
Topic: Motronic 1.3 conversion
Replies: 23
Views: 587

Re: Motronic 1.3 conversion

New injectors in place https://live.staticflickr.com/65535/48686847542_b0355b01f4_c.jpg The e34 fuel regulator will not fit under the banana, also the tilted injector angle means the fuel rail is unusable. Other BMW engines are 91mm cylinder and so injector spacing (not the m30's 100mm) so while the...