[QUOTE=Blue242;2563709]Jeff,

Can you explain why the gears would not be sprayed? I would just LOVE to hear this... QUOTE]


Maybe you should enlighten us all on how a gear can be "sprayed" when it is completely submerged in oil??

I guess its a oil inlet then.I guess it has a oil passage over to the pinion gear side were it sprays it?

I wonder if a dry sump tank like for engine oil that seperates the air out of the oil would help also?

Strip,

You are now on to the path.. That is how it will work.. Except, that the tank may have to be pressurized, and not vented...

Jeff,

It will take too much time to explain line pressure, restrictor sizing for flow rate, spray pattern etc.

Hint,

If there is a bleed off, the gears will no longer be covered in oil, as the oil is no longer there in the same volume is was before the bleed off..

Ask Strip, maybe he can enlighten you...

My day's too short, :cool-smiley-027:

R

What ya say Strip, wanna explain to me why adding a drive cooler such as the Drew Marine product that the upper case is now not full of oil? Cause thats not what Drew Marine tells me.

Drew Marine wants the cooler mounted higher than the drive, and states that along with the ooler, the drive now has increased oil capacity. I can only asume the increased oil capacity is in the cooler and lines. Therfore, the upper is still completly incased.

But hey, carry on with the thread.

Dick, where are the pics of your setup? I'm a bit confused, now.

Griswald,
The thread started out as a reference to a post in the Pantera boat forum. That is where the pic of the drive I built for Tomas is. It shows how I plumbed it.
Not sure a gear whizing at 6krpm, even with it submerged, will have oil around it. I point the return line right at the gear teeth. The pump I use is suppose to make 50psi. I have not tested it yet to verify it. I first set this up on a drive that was subject to 1400hp. And although it was only run for a short period, the drive lived for what the customer stated was 15 hard passes. And witnesses watched his idea of hard passes for two summers, he very seldom babied his boat! I do know that when I opened the filter there was a lot of metal in the folds! So I am not going to make claims. Just what I saw on that setup.

I just finished a new drive for my boat and added a system so I can do some testing. Problem is the 1100hp motor I was going to build has been side lined at present. So my testing will be limited, until I hit the loto and can build the Procharged motor.
As Drew's system has shown, I expect my setup to bring down oil temps, as well as filter the metal out that is produced by the Bravo drive. Long term will it solve all the Bravo problems, No! But I see it as an added plus when running higher hp setups.

Jeff, I just had a customer run his boat without his Simrek drive shower and the next weekend with it. He saw 50* reduction in drive oil temp. So for him it works... Not that I am comparing apples to apples, just repeating what I was told.

Rich I was trying to see where the input to the drive is on your setup to verify it is sprayed at the pinion gear. My attempt at it, was to get an oil spray directly as the teeth are meshing. My thinking it is that the heat that is produced is caused by the grinding of the teeth as they mesh. Spraying cool oil at that point would help gear life. Just my thoughts on it..

Dick

Dick,

You are right in your assumption. With the gears spinning, the oil will fly off. I did not want to give the farm away, but yes, if you size the restrictor properly, and use the 50psi pump, it will most certainly spray the oil at pressure onto the gears. This will help keep the wear down, as well as keep the gears cool as you theorized. Just like a rear end cooler on a speedway car..

My idea of a tank adds more capacity to the system than just a quart (if that much) in the lines.. Of course, it should also have a filter....

Keep up the good work.. And, there are other pumps than Tilton as you know...

There are some other things that can be done to the gears, to control friction, and wear...... But, I am still exploring...

R

Kinsler makes a tank I think is called a expansion tank?? for the fuel injection motors, I have a buddy that used it on his drag 2.5 I think it was around 70-100psi,It would let the air bubbles separate in the tank, it had a bunch of plates/baffles in it ,it was about 2 gal,they claimed it helped in not sending aerated fuel to the Weldon pump. I wonder if the same idea could be use on the out drive oil,just a thought:D

Kinsler Vapor Recovery tanks ( VST ) if plumbed correctly is only seeing 3-5 psi. It is fed by a small feeder low psi pump, and has a return from the motor. It has a 3 psi restrictor that keeps low psi in the tank, and returns the excess to the fuel tank. The idea is to keep low psi on the inlet side of the high pressure fuel pump.... as pulling vacuum on the fuel can actually cause it to vaporise in the fuel line... on our 11000 RPM motors... a little air for even a few tenths will destroy a 20k motor.

RT.... oh and I don't think that tank will take much more than 15psi!.

thanks for clearing that up:D