[1795]

Just talked to the engine builder, my build specs say Dart Iron Eagle, but the heads are WP Windsor Jr 180 cc with 58 cc chamber. According to what I can find they flow 226 cfm at intake and 144 cfm at exhaust. Not the best, they have not been ported. The question is, do we port these or if available get the Dart Iron Eagle 200 cc heads with a 58 cc chamber that flow 285 cfm at .700 lift without porting? WE might be stuck with these heads, as supplies are drying up. Luckily we were able to find a block and it will arrive January 4. Some suppliers were telling him not until March 2021 at best due to the factory being shut down, or at best running on low production line numbers.

Brent, the builder and I both agree that the cam is wrong and he does not know anyone that builds cos for Webers anymore. He said that the last one he had built for a SBF with Webers was 25 years ago and he recalled that it was not as aggressive as this one, nor were the originals this aggressive either. So, start putting on your thinking cap.

If available, new heads would be cheaper than porting the existing ones. Thoughts?

The connecting rods will be similar to what you do, in that they will be longer due to shortened piston height and the crankshaft being lightened.

Jim