Category: Cylinder Head

The Mysterious RayDay Cylinder Head – David Conwill @Hemmings

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Just like the ’30s, bro

This Winfield intake, Cyclone adapter (to install a Stromberg), and RayDay cylinder head were removed from a Model A in 1956. Images courtesy Evan Bailly and as noted.

We are suckers for vintage speed equipment. The hobby of making inexpensive cars faster goes way back—it predates the term “hot rod” by decades. While some names have been around for ages and are so well-established that they’ve become background noise, there are far more companies that tried to enter the business of hop-up parts and didn’t make it. Some folded their tents entirely, but others had come from the more-general auto-supply business and returned to that.

Read David’s excellent article here

Simmons Super Power Cylinder Head

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Simmons Super Power Head

My 29 came fitted with a Simmons Super Power High Compression Cylinder Head.

Whilst not high compression by today’s standards it increased the compression ratio to 6:1. The Ricardo combustion chamber design was licensed from Chrysler.

Sir Harry Ricardo (26 January 1885 – 18 May 1974) was one of the foremost engine designers and researchers in the early years of the development of the internal combustion engine. An exhibition of his work can be found here