Tag Archives: solex

Solex Stock Carb Jets

In the quest to get better mileage, still 14mpg, I’m looking for solutions. One thing I can do is decrease the size of the main jet so the engine doesn’t run so rich. I’m thinking I have a 130, so I should use a 127.5. I also wanted to see what was originally in the carb. Yes, I know I can take the carb off and look, but with me in Chicago and Kermit in Mi, it’s rather hard. I found this list….

Stock Solex Jets

28 PCI... with removable Venture… Venturi =21.5 mm… Main Jet = 117.5/122.5… Air correction jet =180/200…Pilot jet = g50… Idle air jet drilling = 0.8… Power fuel jet = no…Emulsion tube = 29

28PICT-1… 1961-1965.…Venturi = 22.5 mm… Main Jet =122.5… Air correction jet=125z/130Y
Pilot jet =g55… Acc pump jet = .50…Idle air jet drilling = 150… Power fuel jet=1.0mm
Accelerator pump feed = 1.1-1.4cc/stroke…First year of Automatic choke.

30 PICT-1… 1966-1967…Venturi = 24.0 mm… Main Jet = 125… Air correction jet =125z/135z
Pilot jet = g55… Idle air jet drilling = 150… Acc pump jet = 50…Power fuel jet = __
Accelerator pump feed = 1.1-1.6cc/stroke…Larger Venturi

30 PICT-2…1968-1969…Venturi = 24.0 mm… Main Jet = 116/125… Air correction jet =125z/135z
Pilot jet = g55… Idle air jet drilling = 130/135…Acc. pump jet = 50… Power fuel jet =60
Accelerator pump feed = 1.3-1.6cc/stroke…First year for Power fuel system which draws
fuel directly from the float chamber under full load at high Speed.

30 PICT-3…1970…Venturi = 24.0 mm… Main Jet = 122.5/112… Air correction jet = 125z
Pilot jet=65… Pilot jet air bleed = 135…Acc. pump jet = 42.5… Auxiliary fuel jet = 45
Auxiliary air jet =130…Accelerator pump feed = 1.3-1.6cc/stroke…Idle speed is controlled
by bypass around the throttle plate.

34 PICT-3...1971-1974… Venturi = 26 mm… Main Jet = 127.5/130… Air correction jet = 75z /80z
Pilot jet =g50/55… Pilot jet air bleed = 147.5…Acc. pump jet = 42.5… Auxiliary fuel jet
=42.5/47.5… Auxiliary air jet = 90…Accelerator pump feed = 1.3-1.6cc/stroke…Larger

34 PICT-4…1974 (Calif.)…Venturi = 26 mm… Main Jet = 112.5 to 130… Air correction jet = 75z…
Pilot jet =55 to 60… Pilot jet air bleed = 147.5… Acc. pump jet = 42.5…Aux. fuel jet
=42.5… Auxiliary air jet = 90…Accelerator pump feed = 1.1-1.7cc/stroke

Float weight 1961-1967 = 5.7 grams and 1968-1974 = 8.5 grams

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Posted by on July 7, 2011 in Maintenance


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New Engine Notes

I looked a little closer at the new engine yesterday. I think I did notice is that it has dual exhaust with chrome tips! It has a Solex 34 PICT-3 carb, which was the original carb on a 1600 DP engine from 1971 to 1974. The distributor is a dual vaccum 049 instead of the .009 in the old motor. I don’t know enough about distributors yet to know difference . . . .

However, according to Bob Hoover, ” the overwhelming majority of VW owners — and manufacturers — have found that a distributor incorporating vacuum-advance not only gives better mileage but prolongs the life of the engine.” That is good enough for me to keep the 049 in Kermit.

I have found that neither engine has a thermostat or the cooling flaps. Since I know the engine overheated and that I can reduce the temperature another 15 to 17% by installing these, I searched The Samba and found that a person had the HW I needed for a great price!

Bob Hoover has also written articles on the importance of this part of the cooling system. He has also provided a procedure on how to restore this system. The bottom line is, the engineers from Volkswagen felt that their engines needed this cooling system to run efficiently. I know i’m not qualified to argue. Besides I don’t know many folks that take thermostats out of their water cooled vehicles. I did notice that the exhaust manifold in the left hand side has a rust hole, so I’ll swap with the old engine.

I ordered some tuneup parts, Oil Cooler and manifold gaskets today. I forgot the oil screen, but I’m sure I’ll need something else before it’s all over.

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Posted by on July 14, 2008 in Maintenance, Uncategorized


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