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Special Cylinder Head

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Special Cylinder Head
Tony Press Offline
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Location: Malvern, Victoria, Australia
#1
16-03-2020, 05:38 AM (This post was last modified: 16-03-2020, 05:51 AM by Tony Press.)
I cannot find it but was there a picture posted of the special cylinder head which used a variation of the block side water inlet manifold as the head water outlet manifold - or am I imagining things.
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Ruairidh Dunford Offline
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#2
16-03-2020, 07:39 AM
   
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Derek Sheldon Offline
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Car type: 1929 AD Tourer, 1930 Rosengart LR2, Rosengart LR4 Van 1938 APE Tourer (Opal)
#3
16-03-2020, 08:45 AM
Is there any advantage to using one  of these heads over a late Ruby h/c head ?
I am always interested in any information about Rosengart details or current owners.
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Ruairidh Dunford Offline
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#4
16-03-2020, 09:07 AM
I have always found them rather harsh Derek.
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Chris KC Offline
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#5
16-03-2020, 09:16 AM (This post was last modified: 16-03-2020, 09:19 AM by Chris KC.)
Or a Speedex perhaps?

Better than the Supaloy in my humble opinion - at least I though so when I was considerably younger.

My Nippy went like the clappers with a Speedex head, but I felt the compression ratio was a bit high for it to last. As has been commented before, no idea how much it may have been skimmed.


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Rogerfrench Offline
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Location: Richmond, Texas, USA
#6
16-03-2020, 12:30 PM
I think the main advantage the Supaloy head had over the 37 head was that you were less likely to foul plugs in a worn engine. The same was true of the Speedex.
I ran both on my special, it went better with the Supaloy than the Speedex, but it wasn't a direct swap on the same engine so maybe not a fair comparison.
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Tony Press Offline
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#7
16-03-2020, 10:35 PM
Thank you for the quick response - as I thought they do exist ! 

We have found a water manifold but no head so far  Huh
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Ruairidh Dunford Offline
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#8
16-03-2020, 10:53 PM
In my experience the manifold is considerably rarer than the head.
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