Reply to "Dyno Questions from a novice"

danieljonesMember

Assuming:

393C with 4.03" stroke by 3.85" bore, 6" rods
10.5:1 compression
Hydraulic flat tappet cam with specs:
302/308 degrees advertised
224/234 degrees duration @ 0.050"
0.538"/0.562" lift
112 deg LSA
ANSA mufflers and 4-into-1 headers (not the original factory log style)
Ford cast iron square bore intake
Holley 770 Avenger carb

on a Dynojet chassis dyno, I would expect the above to make right at 300 RWHP @ 5000 RPM,
with torque peak around 4000 RPM. That number may require a 1" spacer under the carb
(open or HVH style, 4 hole standard didn't do as well in our dyno testing on the factory
iron intake). You mention the headers are original. If you mean the orignal log style
tubing manifolds without a collector, you may lose 20+ HP.

Dan Jones

7/31/101:11 AM

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