15-01-2021, 09:25 PM
as KC says a good standard pump doent need oversizing.
but after 90+ years thats not always the easiest thing to find.
the pressure fed ulster engine, in my supersports is on a standard size pump. it produces 45lbs cold and 25lbs hot on tick over. ive never had a problem with lack of oil.
when i get time, i put together O/S pumps. i leave the machining to a friends machine shop. as his lathes are more accurate than mine. the pumps are machined 1/32 O/S offset.
i think 1/16 will break through the bolt hole.
tony
but after 90+ years thats not always the easiest thing to find.
the pressure fed ulster engine, in my supersports is on a standard size pump. it produces 45lbs cold and 25lbs hot on tick over. ive never had a problem with lack of oil.
when i get time, i put together O/S pumps. i leave the machining to a friends machine shop. as his lathes are more accurate than mine. the pumps are machined 1/32 O/S offset.
i think 1/16 will break through the bolt hole.
tony