GAS ENGINE HEMIS IN THE 60'S-70'S COULD HAVE 12:1
COMPRESSION RATIOS. TODAYS GAS CAR/ TRUCKS WITH HEMISPHERICAL
COMBUSTION CHAMBERS ONLY RUN ABOUT 8:1 COMPRESSION RATION.. IT TAKES
RACING FUEL TO BURN IN A 12:1 ENGINE OR THE ENGINE WONT HARDLEY RUN..

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