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Austinsevenfriends
4 branch exhaust manifold questions - Printable Version

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RE: 4 branch exhaust manifold questions - Howard Wright - 16-09-2022

Hi Dave

Thanks for the kind words.  I’ve dispensed with the manifold nuts and used 12mm brass rod, drilled and tapped 1/4 BSF and 3/8” long button head Allen key screws glued in the ends with high strength Loctite. Hopefully I don’t have to unbolt the manifold when it’s hot enough to loosen the Loctite  Big Grin.

Cheers

Howard

RE: 4 branch exhaust manifold questions - Nick Lettington - 16-09-2022

It looks brilliant Howard. And much more in keeping with your special. 

How did you fabricate it in the end?

RE: 4 branch exhaust manifold questions - Belinni - 16-09-2022

Good job, looks great. What size of pipe did you use?

RE: 4 branch exhaust manifold questions - Howard Wright - 16-09-2022

[attachment=19862 Wrote:Nick Lettington pid='87885' dateline='1663358519']It looks brilliant Howard. And much more in keeping with your special. 

How did you fabricate it in the end?

(16-09-2022, 09:29 PM)Belinni Wrote: Good job, looks great. What size of pipe did you use?

Hi Nick
Thanks, I made a sketch first then cut a wooden jig. I used mandrel bends cut, tack welded and then brazed to seal the joints.  

Hi Belinni 
The pipes joined to your plate are 32mm OD but the bends and main pipe are 35mm OD.

Cheers

Howard

.jpeg   0CC274FB-13DA-4B30-AFD3-4324470F5202.jpeg (Size: 51.61 KB / Downloads: 366)

RE: 4 branch exhaust manifold questions - Ruairidh Dunford - 17-09-2022

This looks very smart, Howard, nice work.

RE: 4 branch exhaust manifold questions - JonE - 18-09-2022

You'll be getting orders...! Looks beautiful.

RE: 4 branch exhaust manifold questions - narrowgauger - 19-09-2022

hello Howard

are you intending to make this manifold commercially. if so can you provide an indicative price and delivery time.

lovely piece of work that will look great on my special

Bernard Snoodyk

RE: 4 branch exhaust manifold questions - Howard Wright - 19-09-2022

Hi Ruairidh Jon and Bernard

Thanks for the kind words.

No chance of doing this commercially.

For information it’s taken me hours and nearly £200 in materials. Please feel free to use the sketch earlier in the thread.

Cheers

Howard

RE: 4 branch exhaust manifold questions - Nick Lettington - 19-09-2022

The second one will be quicker... you know what your doing now Howard... but £200 on materials is a bit spenny.

It really does look good though and assuming you don't count the 'cost' of your time (if you did, you'd never do anything new) it's probably cheaper than buying something that wasn't quite what you were after.

Nice work.

RE: 4 branch exhaust manifold questions - Howard Wright - 19-09-2022

Thanks again Nick

The material costs are high as I bought mandrel bends with too long legs and extra straight tube that I didn’t need. Still the extra tube may come in useful.

Cheers

Howard