[Ol' Ron]

Tuning the flathead require some thought on carburetors. Tuning for street requires a very lean mixture in cruise and a rich mixture in ower. When I worked withRrichard we were looking for the safest lean mixture we could get away with, running an AF of 15.5/16. To do this you need allot of advance (28/30) This gave the best economy. 22MPG with the L-100 cam. However, this left acceleration in a slug plus detonations. trying several carburetors. he settled on the Edelbrock 500cfm unit. out of the box it's quite rich, ut ran great, Cruise AF in the 13's. We knew how to get econmy but now time to get some power. Bring the timing back to 18/20 @2000 and getting the Af in arund 13 flat brought the 3800 lb HT back life. It took some time to find the right jets and rods for the carb but the ignition worked out with o problem 16 mach all in at 2k 4 deg inital. 8/10 deg vacuum adv and the economy was back. We did this because we like the challenge Engine runs on 91 Oct no alky gas and lighting the tires is not a problem just expensive. The engine is a mild 276, L-100 Edelbrock 65cc heads and 4bl intake. No porting a valve mods wer made. runas stock There is a reason for this.
Gramps