Full flow oil help!

[few2many]

Hey guys, new to the forums.
My buddy and I just rebuilt his dune buggy engine, nothing fancy, new bearings, old jugs and pistons, mild cam and new 30mm pump. The problem with the old motor was that a bunch of junk took out his bearings and cam, destroyed the motor. So I managed to talk him into a full flow with filter and cooler. He already had the Cooler and the adapter on top of the case. Being a very budget minded rebuild, He got the inline filter from a friend and I welded a fitting onto his oil pump plate. (before you ask, the fitting placement was correct and the plate was filed flat and true) We tapped and plugged the pumps outlet. I've seen all full flows travel from the pump plate, to the filter and cooler, then back into the main gallery. He didnt want drill and tap the block, to take it into the main gallery, so we used the adapter on top of the block as the return. It was modified to send oil into both sides of the adapter, the one that leads to the main gallery and the one that leads to the relief/oil sending port. This way, the relief was still in the system and the sending port would be used.
Well, there is very little oil pressure, 5-10 at first, less than 5 when warm. The engine sounds great, no knocks or problems. we have tried to use the sending port and take the reading off the adapter as well, same. The system pumps oil like crazy, we tested the flow(not in numbers, it just flows alot). Anyone see a problem with using the top adapter.
Also, this is a single relief, tpye 1 case and 1/2"lines.

[few2many]

Should this be moved to the engine rebuild section, not sure if theory or rebuild was appropriate?

[Glenn]

What he's doing is a HACK move. If he doesn't want to drill and tap the case he can either get a in/out oil pump or one of those return fittings that eliminate the oil cooler bypass port.

[sideshow]

That sounds weird to me also, I don't like the idea of eliminating the stock cooler either.
The least complicated filter addition I run is the VW of MX late pump;

http://www.aircooled.net/new-bin/viewpr ... d2=ECO0029

FYI that adapter shown is not for use on a single relief.

[few2many]

What he's doing is a HACK move. If he doesn't want to drill and tap the case he can either get a in/out oil pump or one of those return fittings that eliminate the oil cooler bypass port.

How is using an existing port a Hack move? Compared to removing the galley plug, drilling and tapping the main galley and bypassing the relief(single relief case). We used an existing port and hole in the block, on top and out of the way and provides a straight path to the main galley. It may not be high dollar or the common way to do it, I was looking for what people thought as far as the theory of it. Is it any different in function from the common way and how so? It looks good, works good, has only one hose to be routed from the back of the motor.
Also, what size should the oil pickup tube be? I think this was a 40hp case and the pickup tube looked to be 5/16 or 3/8.

[Glenn]

Because you're returning the oil in the wrong place.

Read this: Dual relief oiling system. How it works.

[few2many]

Yeah, I've read that long thread several times, Just read through it again since you linked to it. I'm returning oil straight down the center galley straight to the mains. I keep following the path of oil and cant see where it should be a problem. Anything to offer other than "its wrong"?

[Glenn]

Give it a try and report back when you have 20,000 miles on it.

As for now, i'll stick with the standard full flow. I put 97,000 on my last engine with that setup.

[few2many]

Give it a try and report back when you have 20,000 miles on it.

As for now, i'll stick with the standard full flow. I put 97,000 on my last engine with that setup.

I have no doubt, it was a tried and true, we're still in the try part.
Changed the filter and oil after break in. We have 20+ psi at idle and the relief opens at around 70psi as the rpms get up there. Around 2500 we saw, I think, around 50 psi. So far its working great. Full flow, to cooler and filter, bypasses when it should, Oil IS entering the engine in a perfect spot. Very good considering the budget for it. Literally made it from stuff lying around, new hose and filter. This is a big desert weekend for the buggy. Regrettably, I'll only be able to cruise in it with my buddy for a day or two. I have no doubt he'll put it through its paces for the next week and a half!
Forgot to mention, could not use the relief eliminator/adaptor above, this is a single relief case and we need to keep it for oil control.

[Slow 1200]

aren't you already defeating the oil relief prupose by entering oil in the system after it?

[few2many]

Dont really think so. The whole oil system is pressurized and the releif has pressure on one side and atmospheric on the other side(crankcase anyhow). Shouldnt really matter where the oil enters, as long as it goes into the main gallery. If the pressure gets high enough in the whole oil system, it should open, and does.
We see a steady rise up to 69-70psi and no rise after. Thats supposed to be the correct pressure for the spring we installed.
As Glenn said, I'll gladly report back after the buggy has some miles on it.

[560]

What he's doing is a HACK move. If he doesn't want to drill and tap the case he can either get a in/out oil pump or one of those return fittings that eliminate the oil cooler bypass port.

If you do get and use one of these make sure the hole is in proper position for the oil to flow.
I have one (installed by engine builder) I took off because of other problems. Not sure if it is kit form or how to install properly myself.
It and along with the rest of the oil syasem could be for sale.

Mike

[560]

What he's doing is a HACK move. If he doesn't want to drill and tap the case he can either get a in/out oil pump or one of those return fittings that eliminate the oil cooler bypass port.

If you do get and use one of these make sure the hole is in proper position for the oil to flow.
I have one (installed by engine builder) I took off because of other problems. Not sure if it is kit form or how to install properly myself.
It and along with the rest of the oil syasem could be for sale.

Mike