FYI

i bumped into one of my old Daryl Drummond dynosheets and noticed the carb jets were on the sheet and thought i'd pass them on for their reference value. caveat: of course i take no responsibility for them fitting your setup.

motor was a 12A large bridgeport, dry sumped, power between 7000 and 10,000.

38 mm chokes
main gas 2.0
air .8
emulsion tube F-8

corrected 254.7 hp at 9000
corrected bsfc .526
corrected peak torque 162.5 at 8000.

while the year was 1989 the laws of physics haven't changed all that much and i present this FYI. this particular motor ran 3 Nats that season. it won 2 of the 3 races, beating Jim Dentici at Road America, his only loss that year, on his way to winning the Runoffs. it sat on the pole at Indianapolis Raceway Park, won the race and broke a 5 year lap record.

i used the settings as a base and changed the gas jet one step if the egt was more than 50 degrees away from 1750 degrees.

howard coleman

 

Main gas do you mean 200?
Air correction do you mean 180?

How far from the port are your EGT,s?
thanks
JLS

 

egt about 4-5 inches from flange.

i will check as to my jets.

howard coleman

 

Bimp