So..seems like the 1.5 sump I bought was a waste of money!

[theDrew]

[Alstrup]

That´s the question that was asked

[offrdbus70]

[offrdbus70]

[Quokka42]

Sorry if this has been covered, but 13 pages is a lot to get through. Have you actually monitored the oil pressure, or are you still relying on the idiot light?

Despite the folklore, deep sumps are actually only needed for race type applications where the engine spends long periods at high revs, or where large pumps are used with overly thin oil. Of course, your long oil lines might be a third reason... but I'm just wondering if you're chasing a problem that might not exist.
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[offrdbus70]

[[email protected]]

Thick oil is more likely to exhibit this characteristic than thin oil. I have found that engines with 20-50 (for example), especially if the oil temp is under 220F, take forever for the thick oil to return to the sump. Thin oils do that very quickly.

There can be a lot of thick oil making it's way back to the sump, in the heads and PR tubes, after a high RPM blast if the oil temp is not high enough to get the viscosity down.
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[Max Welton]

[Pat D]

Oil can go many places during acceleration. It gets wound up around the crank shaft like cotton candy, gets pushed up into the heads, moves away from the pick up tube, etc. Buy a 3.5 qt oil sump like I said 13 pages ago and problem solved.
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[gears]

Like a couple other guys, I notice this thread is still around, but can't wade through 13 pages to see if the following suggestion has been made: Measure the filter mount you are using, and be 100% certain that the holes line up precisely with the filter you are using. Those holes sometimes require widening. This was THE solution for a know-it-all racer I once knew.
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[RHough]

[mark tucker]

my logic says it's the builder/assembler. also if your hat is too close to your ears it's hard for rain to get in to your brain.ipsofatso your pickup hat may also be to close and the oil not getting back to the sump. in reality that hat is only a mount or stiffener for the tube when you have a deep sump.

[Northof49]

Should the hat be eliminated or gutted on a deep sump conversion? Easy enough to do if I am welding a longer pickup tube on.
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[mark tucker]

I dont think you need it. .think about it this way,not much oil will be thrown right at that hole being covered by that hat.but lots of standing sloshing oil will find it's way to that hole leading to the sump.if the hat is in the way thats just another abstacle or ramp for it to go around...well it isant getting to the sump if it go's around. you can make it somewhat directional & raise the lower edges so the oil can flow better.I will be adding some deflectors to my aluminum cases so the oil is funneled to the sump when axcellerating or breaking.trap doors would be nice too but it's just a vw might add those too along with a drain from the type 3 diphole to the sump.
Ive seen some hats that were about 1/8" off the floor.not very condusive to oil getting back to the sump. I supose you could add one down in the sump if you wanted, but probably not nessasary.

[hooker]

I know it's already been covered but I would look at it again. First aluminum case I built for drag racing the oil pump inlet hole did not match up with the hole in the case. Sucked air at high rpm and acceleration. Everything worked fine till I got on it.
Yes, I had a deep sump also.
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I spent most my money on women and VW race cars. The rest I wasted.

[SBD]

Did this ever get figured out?
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