ejboyd5:
What racing application of the 187 engine used a Roots supercharger?

Your explaination of the spark plug/fuel injector arrangement in the 300SL makes sense. I assume from this that having the injector in the intake runners and the plug in the block was the preferred arrangement.

No one has quite answered my original question as to the thinking behind this peculiar and never repeated combustion chamber in block design.

__________________
Berfinroy in CT
Present vehicles:
1973 300 SEL 4.5
1959 Rolls Royce Silver Cloud I
1959 Ford Thunderbird convertible/430
Past vehicles;
1958 Bentley S 1
1976 ex-Max Hoffman 6.9
1970 300SEL 2.8
1958 Jaguar MK IX
1961 Jaguar MK IX
1963 Jaguar E-type factory special roadster
1948 Plymouth woody
1955 Morgan plus 4
1966 Shelby GT350H Mustang