Adding windage ports to 2.5 blocks
10-25-2019, 04:14 AM
#46
Rennlist Member
10-25-2019, 04:25 PM
#47
Three Wheelin'
With the 944's lower crankcase, the route for transfer of the air/mist/cloud to the adjacent cylinder is more blocked/restricted than most engines.
It's not really "pressure" in the oil pan (IMO, the ports would be better defined as "transfer") as a whole but creating a route of transfer from one piston displacing area as it travels downward into a void created in the area being created by the piston next to it moving upwards.
So, instead of this air having to make it's way around the lower crankcase's main bearing mass (where more oil/suspended mist are) to transfer, it now has a dedicated path higher up in the upper crankcase.
An inter-cylinder breathing effect if you will.
One cylinder exhales, the next one inhales....., balance transfer.
T
It's not really "pressure" in the oil pan (IMO, the ports would be better defined as "transfer") as a whole but creating a route of transfer from one piston displacing area as it travels downward into a void created in the area being created by the piston next to it moving upwards.
So, instead of this air having to make it's way around the lower crankcase's main bearing mass (where more oil/suspended mist are) to transfer, it now has a dedicated path higher up in the upper crankcase.
An inter-cylinder breathing effect if you will.
One cylinder exhales, the next one inhales....., balance transfer.
T
