19-11-2024, 03:26 PM
Hi
It's not clear from your post if the SU setup is using a mechanical pump or an SU electric pump.
As far as I know, both the standard Austin Seven AC mechanical pump and the SU low pressure pump put out somewhere between 1.5 and 2.5 PSI which the SU HS2 will be happy with.
I know Austineers even gravity feed SUs, and with maybe 12 inches of head the pressure must only be about 0.3 PSI, but they seem to work.
Fuel starvation would normally show up when running at sustained high power, e.g. climbing a long steep hill in 3rd gear with foot to the boards. Assuming 15 BHP you will be consuming fuel at about 1 gallon per hour which should be well within the flow capabilities.
I suspect loss of power for a few seconds has another cause, e.g. temporary lean-out caused by the piston rising too quickly (undamped) as has been suggested.
It's not clear from your post if the SU setup is using a mechanical pump or an SU electric pump.
As far as I know, both the standard Austin Seven AC mechanical pump and the SU low pressure pump put out somewhere between 1.5 and 2.5 PSI which the SU HS2 will be happy with.
I know Austineers even gravity feed SUs, and with maybe 12 inches of head the pressure must only be about 0.3 PSI, but they seem to work.
Fuel starvation would normally show up when running at sustained high power, e.g. climbing a long steep hill in 3rd gear with foot to the boards. Assuming 15 BHP you will be consuming fuel at about 1 gallon per hour which should be well within the flow capabilities.
I suspect loss of power for a few seconds has another cause, e.g. temporary lean-out caused by the piston rising too quickly (undamped) as has been suggested.