M20b25 question

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bealo
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82 320/6
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M20b25 question

Post by bealo »

Calling m20b25 guys…..

I have been reading through some threads regarding the m20b25 swap and can’t find a definitive answer to a couple of questions

1. In tank fuel pump: keep 320/6 pump or use 318is pump?

2. Swap sump and use original 320/6 sump?

3. Use e30 m20b25 starter? Does this work with the 320/6 flywheel?

4. Use 320/6 water pump? If so why?

5. Machine 320/6 manifold so ports marry up correctly or does this not matter?


You can't polish a turd.... but you can roll it in glitter!!!!
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BertjeConti
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Re: M20b25 question

Post by BertjeConti »

What kind of swap do you have in mind?
Only block and head and use the solex 4A1 (bad idea) or including motronic injection system (much better)?

Carburettors need a low pressure fuelpump, injection system a high pressure pump.

Use the original 320/6 sump

Waterpump, doesn't matter as long as it is compatible with your fanclutch.

And use the m20b25 exhaust manifolds.
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Megasquirted '77 E12 520-6

Aspen Silver '96 E39 523i
bealo
E21 Fanatic
Posts: 229
Joined: Wed Jun 06, 2012 11:31 pm
My E21(s): 83 316 1.8
82 320/6
Location: Essex

Re: M20b25 question

Post by bealo »

Planning to put the whole engine in

I thought the m20b25 manifold fouls the steering column??
You can't polish a turd.... but you can roll it in glitter!!!!
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BertjeConti
E21 Mad
Posts: 3012
Joined: Mon Nov 04, 2013 9:49 pm
My E21(s): E12 520-6
Location: nederland , Weert

Re: M20b25 question

Post by BertjeConti »

bealo wrote: Thu Nov 18, 2021 7:18 pm Planning to put the whole engine in

I thought the m20b25 manifold fouls the steering column??
Oh, its a rhd car then?
Image
Megasquirted '77 E12 520-6

Aspen Silver '96 E39 523i
bealo
E21 Fanatic
Posts: 229
Joined: Wed Jun 06, 2012 11:31 pm
My E21(s): 83 316 1.8
82 320/6
Location: Essex

Re: M20b25 question

Post by bealo »

Yes it is
You can't polish a turd.... but you can roll it in glitter!!!!
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