Reply To: 1928 Fastwin & Fleetwin Carb questions

[Buccaneer]

Tom wrote:

I don’t recall where I read this, but I believe the exhaust scavenging of the ’29 underwater exhaust helped horsepower.  Also, you need the air horn in place for easier starting.  There’s a slug of air/fuel that gets blown out when starting that is lost if the air horn is not present.  My ’29 starts pretty easily if I fill the carb, then shut off the fuel until it’s running.

Tom

Seeing how the choke plate is in the air horn, I would certainly
think it would be a bonus having it on.

I suppose the underwater exhaust could act like an eductor,
helping to pull out / scavenge exhaust out of the engine?

Prepare to be boarded!