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Recommended Settings for Weber Carbs |
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These are starting points - each engine can vary greatly! |
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Engine Size & Cam |
Main Venturi |
Main |
Air |
Idle |
Emulsion Tubes |
Notes |
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1.6L See Below |
28 |
110 |
200 |
52 |
F7 |
59 356 1600 Super |
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1.6L |
32 |
130 |
200 |
50 |
F7 |
356 1600cc |
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1.7L See Below |
28 |
130 |
200 |
55 |
F11 |
on 356 w/C heads |
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1.7 912 (1720 BB) |
32 |
125 |
180 |
55 |
F7 |
See Note 1 Below |
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1.7 912 (1720 BB) |
32 |
125 |
200 |
50 |
F11 |
See Note 2 Below |
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1.7L (1720 BB) |
32 |
135 |
200 |
50 |
F11 |
356 1720cc |
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2.0L |
27 |
110 |
185 |
50 |
F2 |
Porsche Factory |
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2.0E |
30 |
125 |
180 |
55 |
F26 |
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2.0S |
32 |
130 |
180 |
55 |
F3 |
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2.2E |
30 |
125 |
180 |
55 |
F26 |
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2.2T |
30 |
125 |
180 |
55 |
F26 |
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2.2S |
32 |
130 |
180 |
55 |
F3 |
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2.4T |
30 |
130 |
180 |
60 |
F26 |
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2.4E |
32 |
135 |
180 |
55 |
F26 |
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2.4S |
32 |
135 |
180 |
60 |
F3 |
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2.4 CIS T |
30 |
130 |
180 |
55 |
F26,F3 |
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2.7 CIS |
32 |
135 |
180 |
55 |
F26 |
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2.7 CIS w/Tall AV's |
34 |
140 |
180 |
60 |
F3 |
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2.7 E, S |
34 |
145 |
180 |
60 |
F3 |
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2.7 E, S w/ Tall AV's |
36 |
155 |
175 |
60 |
F3 |
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Note: Tall AV's = Auxilliary Venturi's |
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CIS : Indicates CIS Cams |
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You should go through your Carbs and make a note of all the sizes of the different components. |
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This will help in the trouble shooting if you have any problems. Often the sizes of jets are only |
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finalized by trial & error. Many variables can affect your Webers performance such as fuel available, |
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elevation of driving area, engine options and the environment. All must be taken into account when |
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trying to determine the proper jets. |
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The settings were provided by PMO for the 2.0L and larger. |
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The Settings for engines smaller than 2.0L are actual inventories provided by 356 owners |
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Note: 1 |
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The bottom end seems to be |
a lot leaner but power appears |
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fairly rich with dull transition |
to 3200rpm, then excellent |
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power from 3300-5500. High |
speed runs with constant |
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rpm's of 5500+ were not as |
powerful as expected. The |
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engine seems to stop breathing |
at 6000rpm and get hot at |
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highway speeds of 75-80. |
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Note 2 |
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The bottom end seems to be a |
lot leaner, burst power is |
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significantly lower (acc pumps) |
mid-range is a little better |
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and top end is still wanting. |
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