Type 1 oil pump modifications for full flow, be sure to check this! Options

[crash914]

Here are a couple of pictures showing what the differences are between a stock type 1 oil pump and a modified for type 4 use one.

This pump is also plugged for full flow. don't do this if you don't have a full flow take off cover. You will destroy your engine..

about 1/8 inch needs to be removed from the snout of the pump. Hopefully you can see that the pump won't seat as it hits the cam.

[Mark Henry]

Full Flow was pioneered by the Type one crowd as the T1 VW engine has no oil filter, only the sump screen.

It does increase flow and IMHO a must have if you are running an external oil cooler. Herb's application is a race car with an external oil cooler.
To me the sandwich adaptor is a poor solution, mainly because of the small passages, plus you are introducing quite a few sharp 90 degree turns which is bad for flow.

In a stock 914 or even modified it's not a must have as long as you don't install a bigger than 26mm T1 pump. In my '67 bug T4 conversion my stock filter location would have been a PITA.

I do think a new type one pump (26mm) is a good upgrade for even a stock engine. Rarely do I use the old T4 pump and a good number I've checked are worn out anyways.