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The Waukesha-Ricardo head was available during the T era. It has low compression and a Ricardo combustion chamber. The right photo is from Dean Yoder.
Green Engineering was an early manufacturer of Model T speed equipment, including this high compression head. It does not have a squish style combustion chamber and has the spark plug over the cylinder. This rare head and the equally rare Riley head were loaned to us by Gary Hylton.
Riley produced Model T and A speed equipment after the end of Model T production. They produced the multi-lift valves and this head with dual spark plugs over the valves and squish style combustion chamber. This particular head appears to have been modified for larger valves and smaller spark plugs.
The Haibe Hipower, Giant Power, and Simmons Super Power Heads all appear to be similar, except the Simmons head has the spark plugs over the intake valves. These photos are from Dean Yoder.
We have no information on this Berg Turbulator head. It looks like a very nice head. These photos are from Mike Sumerall
The Sherman Super Fire head is a later head that is no longer available. It was available with one or two spark plugs per cylinder. The combustion chamber looks similar to the Riley head. These photos are from Wayne Murray.
The Z head is the most popular high compression head currently available. The external appearance is the same as a stock head, except for the "Z". It appears to be patterned after the Haibe and Giant heads, although there are differences around the spark plug.
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