09-12-2021, 08:32 PM
To those who have little knowledge of the Austin seven engine it might be confusing, so lets start by saying... Both systems have an oil pump and both systems create oil pressure.
The 'oil jet' system squirts a lot of oil at very low pressure through jets that 'squirt' at holes in the crank as it passes by. These holes lead to the big end bearings. It seems a poor system but works very well.
'Pressure fed' engines run at a much higher oil pressure with oil from the pump going to the bearings at pressure all the way. it seems to be a better system, but if you don't need it then you don't need it.
The 'oil jet' system squirts a lot of oil at very low pressure through jets that 'squirt' at holes in the crank as it passes by. These holes lead to the big end bearings. It seems a poor system but works very well.
'Pressure fed' engines run at a much higher oil pressure with oil from the pump going to the bearings at pressure all the way. it seems to be a better system, but if you don't need it then you don't need it.