Dry sump oiling

LI-Rick

As I wait for my Spyder project to be built, I’ve been collecting parts and working on the small projects that will need to be done. I’ve decided that I’m going the dry sump route, and am using the CB pump. These pumps are not really set up for full flow oiling, but are easily adapted by plugging one galley and fitting a full flow cover.

CB sets these up to use a 16mm to 8an adapter, which is probably fine, but I wanted to use a 10an on the inlet side from the dry sump tank to minimize any possibility of oil starvation. So I ordered up a 16mm to 10an adapter. Well, once it arrived I measured the through hole, and it was exactly the same as the 8an adapter. This wasn’t an improvement at all. After pondering this for a few minutes I decided I would drill and tap the inlet for 1/2” npt, and ordered up a 1/2” npt to 10an fitting. This fitting has a .500” through hole vs the .395” hole on the 16mm adapters. I don’t have a 45/64” drill, as who does? I didn’t really want to spend $25 on a bit to drill one hole, so I drilled it to 5/8”, as that is the closest size I have. I then used my boring head to bore it the rest of the way.

I’m just waiting on a Berg full flow cover now to finish it off. Does anyone think it is worthwhile to O ring the pump body?

Notice the difference in size between the 2 fittings.

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3/28/2211:56 AM

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DannyP

No, don't O-ring it.

On the 2276 I built last summer, I did put some Permatex aviation compound on the oil pump suction side(to seal the case to the pump), but honestly the pump was very snug going into the case. It needed a few hard taps with a rubber mallet to seat it.

I did also plug the pressure side of the case, I believe a 3/8" MIP is fairly easy to tap into that one.

Looking good: LOVING the milling machine!

3/28/2212:06 PM

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LI-Rick

DannyP has suggested using a Saldana dry sump tank. They are reasonably priced and well built. The only issue I didn’t like is the fittings are all 12AN , which is fine on a V8, but way larger than we need on a VW motor. I know they make AN reducers, and that would be easy, but I don’t like the idea of extra fittings if not necessary. Instead, I cut off the 12AN fittings and welded on the appropriate 8 and 10 AN sizes. The only issue was I had never Tig welded aluminum. I spent quite a few hours practicing on scrap aluminum before I felt confident that I could do this without burning through and making a mess of the tank. Here is the results.