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Vin-barrett Vin-barrett is offline
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Join Date: Jul 2005
Location: Bloomfield NJ now Fernandina Beach FL
Posts: 1,119
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Quote:
Originally Posted by jpnovak View Post
The CIS pump will normally put out about 43psi (3bar) at maximum. The carbs (weber, PMO, Zeniths) all use 3 - 3.5 psi. The PMO regulator will reduce the pressure.

Using the PMO regulator is the most simple method for switching the fuel system to carbs.
It has baffled me how many on this board believe this to be true.

While a CIS system has high pressure, without the iron fuel head you will only get about 2psi with a factory CIS pump. The PMO regulator brings it up to 3-4 psi
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-Vinny
1983 911SC
Old 02-12-2020, 09:30 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)