OK, based on our LS based motors...
...is it better to have a standard volume but higher pressure pump, or higher volume with standard pressure?
I thought they are slightly related, but I know some of you fluid dynamics types can explain this to me.
OK, based on our LS based motors...
...is it better to have a standard volume but higher pressure pump, or higher volume with standard pressure?
I thought they are slightly related, but I know some of you fluid dynamics types can explain this to me.
Gone, but not forgotten!
too much flow and you'll drain your pan of oil and have it all on the top end of the engine. All builder recommendations I've seen said to stick with a stock or ported pump at the most.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
More Volume! Frank(1320) can explain this better than me... Frank, where are you?
30' Ford Model A Tudor Sedan - Custom chassis - Big bore LS2 - twin B76's - Glide - 9" w/ 3.07 gears - 30" DR tire - 2k lbs cruiser
I think the stock pumps are good to tell you the truth.
To me high volume is OK because your only talking 20% more volume so starving the motor of oil isn't really going to be an issue.
If you want to be on the safe side then go, stock pan, high pressure. large pan or extra filters, high volume.
I don't think you will have any problem with either pump though. The LS motors seem to have plenty of flow back orifices to handle the return flow to the pan.
It also seems that the oil pressure issue of those modified LS engines was indeed a pickup tube o-ring problem.
Before you order a pump, definitely check with your cam manufacture to see what they recommend.
100% Oring problem...
The most important thing to look for is alignment of the pickup tube mounts...
First insert the oring end of the pickup tube into the pump and tighten down, usually easier for oring to be installed in pump then tube inserted in... now look and see if the other mount/s are touching the windage tray....if not stop and bend the tube to make them fit with ONLY the pump end bolted up... This seems to be were the misalignment problems occur. If the mounts aren't touching the tray when you bolt them down it pulls on the alignment of the pump area and binds the oring... That usually creates a problem with sealing properly causing the low pressure.
+1 kinda
I put the pump end of the tube on first hand tight on the bolt then snug the tube to the mains then torque the tube to the pump then torque the tube to the mains.
Sorry about my lack of punctuation care.
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