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- - Pmo efi (http://forums.pelicanparts.com/911-engine-rebuilding-forum/847682-pmo-efi.html)

Sigurd

01-20-2015 11:26 AM

Pmo efi

Do anyone have advice on what size PMO EFI throttles I should use on a 3.2ss with twin spark and 964 cams? It will be used on a 1973 street car.

Mark Henry

01-21-2015 10:43 AM

46mm

40's are borderline too small and 50mm is too big.

I have 46mm motorcycle ITB's on my 2.6L (really 2550cc), 4 cylinder, type 4 bug engine, so per cylinder that's a bit bigger (637cc vs 533cc per cyl) than your engine.
My T4 may be bigger per cylinder, but the 911 head flows better and has higher RPMs.

totle

01-21-2015 02:13 PM

Hei Sigurd,

Sent you a PM

JJ 911SC

01-21-2015 02:23 PM

46mm fitted:

http://forums.pelicanparts.com/uploa...1421882608.jpg

safe	01-22-2015 02:28 AM

46 is probably a really nice choice, I have something like 48 mm on my standard 3.2. As long as you can open the throttles nice, even and progressive you can get away with pretty big stuff.

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