16-01-2021, 09:25 PM
Hi Jacob.
Austin fed the centre main bearing on the three bearing pressure fed engine.
The crankcase already has the feed set up for it.
The flow will be more even from the centre of the crank.
A Dave Dye oil pump should be suitable and fit the case with minimal alteration.
I am running 60 psi in a two bearing engine. I suspect with centre feed you will not need such high pressure.
Make sure you get the centre bearing shell of the crank line bored with a the block you will be using bolted down and get some spare shells bored at the same time.
It is a good idea to fit O rings externally on the cam front bearing and fill in the oil groove or make a new bearing without the groove and fit a restriction in the camshaft feed. ( I use 1/16 reducing bush in the oil gallery )
It might be worth looking into narrowing the rods to enable a thicker section at the centre web and use rods without pinch bolts.
Austin fed the centre main bearing on the three bearing pressure fed engine.
The crankcase already has the feed set up for it.
The flow will be more even from the centre of the crank.
A Dave Dye oil pump should be suitable and fit the case with minimal alteration.
I am running 60 psi in a two bearing engine. I suspect with centre feed you will not need such high pressure.
Make sure you get the centre bearing shell of the crank line bored with a the block you will be using bolted down and get some spare shells bored at the same time.
It is a good idea to fit O rings externally on the cam front bearing and fill in the oil groove or make a new bearing without the groove and fit a restriction in the camshaft feed. ( I use 1/16 reducing bush in the oil gallery )
It might be worth looking into narrowing the rods to enable a thicker section at the centre web and use rods without pinch bolts.