How much psi does stock 69S pump make?

[dhopkins]

Anybody know the answer to this question? I am switching to PMOs and need to decide whether I need a new pump.

Don
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1969 911S
1976 914
1981 911SC
2001 C320

[ErVikingo]

Don, you need a pump and a pressure regulator.

[nick-moss]

Doesn't the PMO kit come with a regulator?

[911pcars]

If you mount a 4 psi pump on the front crossmember, you'll have about 3-3.5 psi at the carb inlets, and without a pressure regulator (confirmed with an inline pressure gauge). KISS. Here's one by Airtex that I use:

Sherwood

[dhopkins]

Thanks. It does come with a regulator/meter. But I was leary of having to regulate down a lot if the OEM pump was really strong. I found in the workshop manual that the pump put out 11.8+/-3psi. Thanks.

[edmayo]

The MFI pump will go 35-40 psi, the 11.5 psi mentioned in the manual is what the return side is regulated to by the check valve in the banjo fitting. Use the 4 psi pump as was suggested.

[72targa]

Mr. Mayo:

I truly enjoy the advice you give on the PCA web site about our early cars that regularly makes its way into my Inbox!