Quote:
Originally Posted by Vin-barrett
The PMO regulator brings the pressure up, not down.
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Sorry, this is incorrect.
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.
The best way (IMO) is to find the early 911 , 3 port, carburetor fuel pump that is internally regulated at 3psi. This will likely require other changes to your fuel system such as fuel pump location and/or fuel line relocation.