Recent content by smithdl4

Thank you everyone for your help. My solution for this is to return to my old reliable 3 stage pump, or at least one like it. If I ever find the problem I’ll be sure to come back here and reopen the thread. Again many thanks to all!

Ranger Mike, No problem with cavitation and the tank is baffled and designed to remove air. The entire system worked flawlessly until the switch from a three stage pump to a four stage pump. The extra stage is connected to a fiiting on the oil pan that is higher than the other two and feeds...

There is a vent from top of the engine that connects to a “T”. The resevoir tank also connects to that “T”. The remaining branch of the T is connected to an empty 1gal overflow tank open to atmosphere. The scavenge side of the pump is supposed to create a very small vacum around the pan...

Lnewqban, I have tried running the pump with a secondary drive system, an electric drill. It begins operation, but as the pump begins to build pressure it comes to a point where the drill will no longer turn the pump. The pressure gauge however never reaches the normal operating pressure the...

Baluncore, You are correct about the cross gallery in the pump block, sort of. The inner most scavenge pump’s outlet is directly into the output side of the middle scavenge pump whose outlet is directly into the output side of the forward most pump whose outlet returns the oil to the tank. So...

Baluncore, First picture is schematic. Second is a duplicate I couldn’t get rid of. Third is a picture of typical pump construction. The forth and fifth show actual examples of connections. Mine are very similar. The difference is location of the return fitting on the pump and height of...

Baluncure, Below are the best examples I can find of the system I am dealing with in my query. Do these help?

The pump is basically an industry standard design automotive dry sump pump. Manufacturer is NRC Machining. If you are familar with an automobile oil pump which uses gears then this is just 4 of those on a common driven shaft that mounts outside the engine. One pump section provides pressure...

I have an engine that uses a dry sump oiling system. The oil collection pan has three AN fittings to use for scavenging. Two of the fittings are approximately on the same level, the third is about 1/2 to 3/4 inch higher than the other two. The system ran for years with no problem using a...

Understand that statically for road racing RC should be in center but you don' race statically. Everything is moving with the suspension as the car dives, rolls, and turns. Your saying that keeping the RC in the center as the car moves around is optimum? Thanks in advance. Your class has...

Ranger Mike, I've been playing with the Perf Trends software. Was interested to know which direction the roll center ought to move on a road racing car. It appears to be easy to get it to move toward the outside wheel, but very difficult to get. It to go toward the inside of the turn. Seems...

Kozy; The bar rate includes the arm length. It is a tubular bar made by Speedway Engineering. Its 37 1/2 inch x 1 1/4 inch x 0.188 wall tubular bar in front using 12 inch arms. Rear is 37 1/2 inch x 1 1/4 x 0.095 wall tubular bar using 10 inch arms. They measure using an Intercomp sway bar...

Kozy; As I understand it the bars are rated in LBs per 5 degrees of twist per their manufacturer. Also, I think the wheel rate for both ends would be smaller as the springs are canted over 9 degree which changes the actual spring rate the suspension sees, correct? Ranger Mike; The rear has...

Ranger Mike; Thanks for the affirmation on the car being too stiff. Wouldn't the MR be applied to the bar also since it is not being applied directly to the outer ball joint pivot point? Using what you did in your reply, how would you select springs and bar(s) for that example if you had to...

Ranger Mike; Thank you for this classroom undertaking. It has been extremely enlightening and, as if you read my mind, you went back and explained how the springs were calculated. I went through what was done early and had lots of questions. This answered those so well that I just went...