Aluminum Block Oil Pressure Loss

[donjetman]

Here is a FB video link to Steve Morris Engines where he checks bearing clearance cold & hot on an aluminum block. Interesting
https://fb.watch/g_5bxcdgm5/

 

[Dustin Jackson]

@donjetman Very interesting video man. I want to see the same done with an aluminum and iron block LS.

I want to hate Facebook but there is some good info on there.

 

[Foggy]

I would imagine that "billet" vs "cast" alum blocks may make some difference here.
And of course the make up of the crank itself - steel, forged, billet...
The crank would expand "some" with heat to close the clearance a bit
I think this is the reason (maybe) that gm has gone with a variable oil pump
in the new gen 5 V8 and a reason why the high end engine builds OE and aftermarket
use a dry sump oiling system.
Just my thoughts... Good Video
Thanks for sharing