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Home > Help Needed / General Tech Chat > OT: Making A 6 Branch Manifold Work On A 4 Cylinder

GaryOS

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Formally spanner181187

Dublin, Ireland

6th Oct, 2009 at 11:29:06pm

I will be turboing my 318i eventually and so I have started collecting parts. I really don't want to make an exhaust manifold and I think I may have found a solution.

The M20 (6 cylinder) engines seem to have the same bolt pattern as the M40 (4 cylinder). Assuming that they do, would it be possible to hack 2 branches off this crappy ebay manifold and use it for the M40?

The reason that I ask is because the branches meet in a 2-1 collector so by cutting 2 branches off one side of the manifold will feed from 3 cylinders and one will feed from 1

What do you think? Should I stop being a pikey and build a manifold?

http://cgi.ebay.com/ebaymotors/bmw-e30-323...sQ5fAccessories

On 12th Nov, 2009 Paul S said:
I think Gary OS has taken over my role as the forum smart arse *happy*


On 30th Apr, 2010 Rod S said:
Gary's description is best

Rob H

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The West Country

7th Oct, 2009 at 07:55:03am

That looks like a four branch manifold that's had two extra runners added, have you tried contacting the seller to see if the do one for the M40?

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MikeRace

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7th Oct, 2009 at 08:28:16am

Thats bloody cheap, just chop the two end ones off lol

Probably not as simple as that?

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


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GaryOS

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Formally spanner181187

Dublin, Ireland

7th Oct, 2009 at 10:01:26am

Rob, I haven't contacted the seller yet. The M40 was never available in the USA and so there is very little aftermarket kit available for it. There is no harm in asking him though, so I will send him a mail.

Mike, that's what I was thinking. It's so cheap that it's probably worth taking a chance on

On 12th Nov, 2009 Paul S said:
I think Gary OS has taken over my role as the forum smart arse *happy*


On 30th Apr, 2010 Rod S said:
Gary's description is best

gr4h4m

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7th Oct, 2009 at 10:07:09am

choppy choppy

I run a supercharger and I don't care the TB is on the wrong side.
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Vegard

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7th Oct, 2009 at 10:14:14am

That is incredibly cheap!!!!

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

GaryOS

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Dublin, Ireland

7th Oct, 2009 at 10:15:16am

On 7th Oct, 2009 Vegard said:
That is incredibly cheap!!!!


Both in terms of cost and quality, I would imagine. It's worth taking a chance on at that price though

On 12th Nov, 2009 Paul S said:
I think Gary OS has taken over my role as the forum smart arse *happy*


On 30th Apr, 2010 Rod S said:
Gary's description is best

GaryOS

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1424 Posts
Member #: 2810
Formally spanner181187

Dublin, Ireland

7th Oct, 2009 at 05:11:47pm

I just realised that I was being spastic. I can obviouls cut a branch off each end to keep each side of the collector supplying from 2 cylinders. I will make sure the supplier doesn't do a 4 cylinder one first though

On 12th Nov, 2009 Paul S said:
I think Gary OS has taken over my role as the forum smart arse *happy*


On 30th Apr, 2010 Rod S said:
Gary's description is best
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