I have always wondered why GM made the stove bolt combustion chamber so odd compared to other motors.
By that I mean the exhaust valve is not level with the intake , but in a combustion well?
Later motors went to a bath tub design, does any one have any knowledge of why?
Is there an advantage to the design? Heat removal maybe?
Greetings . . .
This unique combustion chamber design was developed by Chevrolet engineers in the early 30’s when tasked with producing a marine racing engine. Their findings began to be incorporated into the 206 stovebolt beginning in ’34. The design intentions are described in the
1934 Engineering Features technical reference – beginning on or about page 25.
As a result the compression-ratio of the so called Cast Iron Wonder would increase 25% during the decade of the 30’s:
carnut site - cheverolet technical specsFor those unfamiliar with the GM Heritage Center archives. The complete list of documents can be found here:
GM Heritage - Vehicle info kits regards,
stock49
