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Machine 7, high quality air-cooled  restoration and performance parts
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Old 30-03-2020, 06:00 PM   #511
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wow. Such skill.
Thank you, very kind
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Old 30-03-2020, 06:41 PM   #512
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This picture gives you an idea of how low it is. You can see the table next to it. That's a normal table!

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Old 30-03-2020, 06:52 PM   #513
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Thats a nice looking front end.
A bit like a more stylish Ginetta G27.
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1970 1300 Beetle resto here
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Old 30-03-2020, 07:05 PM   #514
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Thats a nice looking front end.
A bit like a more stylish Ginetta G27.
It's really difficult to get it right. I'm still not sure.
I won't know till its done, then it will be too late
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Old 20-04-2020, 08:00 PM   #515
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As a break from the bodywork, I've made the exhaust header. To be honest, I had to make it because the design has been causing me sleepless nights!
Do I go 4-2-1, or 4-1?
4-2-1 is better for torque, 4-1 better for high rpm horse power.
The original system is 4-2-1, merging the outlets from each head together. There is some followers of the "cross-over", where the back ports are linked together, then the front pair. It gives a smoother sound and possibly a little more bhp.
I can get quite nerdy about exhausts. Probably explains the sleepless nights!
I decided on following the original idea of a 4-2-1, but obviously my headers are much shorter. They are however, equal length. The primary tubes are 440mm long.. This is calculated so that the exhaust pulse from the first cylinder has passed the join before the next pulse reaches the join. The motion of the first pulse helps to "pull the next out of the cylinder.
My tubes are 304 stainless steel starting at 38mm od and going up to 45mm at the last joint.
The 3 bolt flange isn't welded in yet. I will do that, and make the silencers, once the engine is in place and the bodywork made. Or at least designed.
This flange is actually the same size as some of the vw beetle aftermarket silencers, so I may end up using one of them

I put the engine on the table upside down so I could work out the routing easier.

Anyway, here's the pictures




And some m8 brass nuts with 11mm spanner size.
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Old 20-04-2020, 08:16 PM   #516
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Nice work, will the ground clearance be ok. Iíve not seen a Alfa boxer engine in a beetle chassis before so itís a job to imagine how it sits. I expect youíve already thought of that already though.
Iím following this amazing project & look forward to the updates. Keep up the great work.

Phil
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Old 20-04-2020, 08:30 PM   #517
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Originally Posted by cox71slammed View Post
Nice work, will the ground clearance be ok. Iíve not seen a Alfa boxer engine in a beetle chassis before so itís a job to imagine how it sits. I expect youíve already thought of that already though.
Iím following this amazing project & look forward to the updates. Keep up the great work.

Phil
IF I've worked it out right, it will be about 30mm below the lowest point on the gearbox.
I'm going to have the suspension at standard height (more or less) so it won't be a problem.
To make the car look low, I'm "wrapping" the body under the floor. I'll have a gap between the original floor and the aluminium one. I'll be running the water pipes, fuel, wiring harness and brake lines through this void.
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Old 20-04-2020, 10:33 PM   #518
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Lovely
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Old 24-04-2020, 10:06 PM   #519
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Have a picture of an Alfa head. No reason really, I've just spent the afternoon cleaning and lapping the valves in.
The more I work on this engine, the more I like it!



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Old 04-05-2020, 02:58 PM   #520
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Almost finished building the short block.
New mains, big end bearings and rings.



I don't care if its vw, subaru or alfa, you've got to love the engineering and compactness of a flat four!

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