mbrady.glide
Member
So I put new sleeves and pistons into my '39 A, which are the 3.125" bore of the Super C C123 engine. Looking through the parts catalog, the intake/exhaust manifold is the same for both engines, however the exhaust valves listed for a C123 are smaller; 1.16" vs the 1.22" sold for the C113.
My question is: based on the info found in the catalog, with my C113 now having the displacement of the C123, and assuming it theoretically has better exhaust flow, does it actually develop more horsepower than a factory C123, everything else being equal? Anybody dyno tested this combo? Any adverse effects on the rest of the drivetrain, under normal workloads?
I've got no experience with the C123 or Super C's so this is all speculation. Why would they have produced a larger displacement and then restricted its exhaust with smalle valves, considering the same manifold was used?
My question is: based on the info found in the catalog, with my C113 now having the displacement of the C123, and assuming it theoretically has better exhaust flow, does it actually develop more horsepower than a factory C123, everything else being equal? Anybody dyno tested this combo? Any adverse effects on the rest of the drivetrain, under normal workloads?
I've got no experience with the C123 or Super C's so this is all speculation. Why would they have produced a larger displacement and then restricted its exhaust with smalle valves, considering the same manifold was used?