Crankcase Pressure

[joespanova]

Originally Posted by HandOverFist

My low buck solution and legal...

Apparently you can't run a Dart block in stock.......because this would be pointless if you could.
The Dart block vents the crankcase through "slots" in the lifter galley like the big blocks do.

[HandOverFist]

Originally Posted by joespanova

Apparently you can't run a Dart block in stock.......because this would be pointless if you could.
The Dart block vents the crankcase through "slots" in the lifter galley like the big blocks do.

Joe - That would be assuming one would want/allow the oil to drain back directly over the crankshaft.

[joespanova]

Originally Posted by HandOverFist

Joe - That would be assuming one would want/allow the oil to drain back directly over the crankshaft.

You'd think Maskin and gang would be well aware of that.....myself . I want the oil to get back to the sump as quickly as possible.
I'll manage windage some other way........

[HandOverFist]

Originally Posted by joespanova

You'd think Maskin and gang would be well aware of that.....myself . I want the oil to get back to the sump as quickly as possible.
I'll manage windage some other way........

I'm no expert for sure, but I also don't have any Dart blocks lying about. It's my understanding that the Dart blocks oil differently and likely less oil up top to contend with. Using these old GM blocks my solution just seems to make sense to me.

[joespanova]

Originally Posted by HandOverFist

I'm no expert for sure, but I also don't have any Dart blocks lying about. It's my understanding that the Dart blocks oil differently and likely less oil up top to contend with. Using these old GM blocks my solution just seems to make sense to me.

What you did makes sense to me ..............on an OEM block , yes.

[pfordamx]

Ok i'm assuming a header vac system isn't legal in stock either since no one has mentioned it? and it would seem a obvious answer.

[Alan Nyhus]

Originally Posted by HandOverFist

I'm no expert for sure, but I also don't have any Dart blocks lying about. It's my understanding that the Dart blocks oil differently and likely less oil up top to contend with. Using these old GM blocks my solution just seems to make sense to me.

Rich, here's a Dart SHP:



The valley is much like a big block Chevy. They are a priority main oiling system, so the mains get oil first, then the cam/lifters....just the opposite of a factory small block. You can flood the top end pretty easily, so the lifters need to be chosen carefully.

[HandOverFist]

Originally Posted by Alan Nyhus

Rich, here's a Dart SHP:



The valley is much like a big block Chevy. They are a priority main oiling system, so the mains get oil first, then the cam/lifters....just the opposite of a factory small block. You can flood the top end pretty easily, so the lifters need to be chosen carefully.

That's a nice looking piece there Alan...maybe some day before I die I will get to join the big boy ranks. With holes that large I would at a minimum have to screen them just for peace of mind.

[carl hinkson]

Originally Posted by HandOverFist

I'm no expert for sure, but I also don't have any Dart blocks lying about. It's my understanding that the Dart blocks oil differently and likely less oil up top to contend with. Using these old GM blocks my solution just seems to make sense to me.

Dart blocks do use priority oiling and they get the same oil up to the top as a stock block. Nothing is restricted on the block to decrease the flow of oil to the top end.

Don't use the Dart cam bearings with 3 holes to much bleed off if you want to talk about oil running down on the cam.

[joespanova]

Originally Posted by carl hinkson

Dart blocks do use priority oiling and they get the same oil up to the top as a stock block. Nothing is restricted on the block to decrease the flow of oil to the top end.

Don't use the Dart cam bearings with 3 holes to much bleed off if you want to talk about oil running down on the cam.

......and IIRC that's easy to see when priming on the stand with the intake off........I'll vouch for that.