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Sick carb/ what do ya'll think
I got a sick 44 IDF. runs rich and here is what I found so far.
The fuel is spashing onto the butterfly mostly onto #2 CYLINDER side. I pulled the top off and checked the float setting. Initially it was at 12MM. Don't know why I did this but set it to 10MM like the WEBER book said. As expected the problem got worse. Played with fuel pressure initially 3 lbs down to 1.5 lbs not much change. Pulled top off again set float to 13MM somewhat better still splashing. fuel pressure to 1.5 and still splashing. So I guess I need a new fuel inlet valve. Right. Local flap says they can order a rebuild kit  Who else supplies them. Might as well do both sides.
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03-04-2002, 08:32 AM
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Is the float still floating???
Just an idea... I remember that some of the plasic floats age and the supposedly closed cell foam sucks in gas... Patrick
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'74 Porsche 914 2.0l '90 VW Vanagon 1.7l Diesel |
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03-04-2002, 10:38 AM
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See
See thats why you guys are out there. I forgot all about that line of trouble shooting. I'll check it tonight.
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03-04-2002, 10:55 AM
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Like Patrick says, check the floats. The needle valve seat wears over time and will eventually leak, too, so that rebuild kit may not be such a bad idea.
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03-04-2002, 01:58 PM
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OK what next
The floats float. excatly the same as the other side. Took it apart too. Rebuild time. Unless somene else has a similar experience I will post when it is fixed.
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03-04-2002, 03:19 PM
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While you are doing your carb rebuild, could you check on the sizes of jets, emulsion pipe, pumps and venturis??? Just out of curiosity... It also might help me making a decission regarding the carbs I will get for my engine.
Thanks, Patrick
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'74 Porsche 914 2.0l '90 VW Vanagon 1.7l Diesel |
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03-04-2002, 04:02 PM
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Sure
I am running 50 idle Main gas 185 air, f11 emulsion, 130 gas. pump jet is 55. didn't take the venturi out But a think it is 36MM.
Tough to figure out jets when I can't control the gas spilling over onto the butterflys. Where does this get picked up at? through the idle jets or main gas jetting. |
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03-04-2002, 05:46 PM
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Join Date: Mar 2002
Location: Phoenix, Arizona USA
Posts: 203
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Yoh!!! -
Saw your reply. Copied this from another of my posts. Hope it helps on your carb dilemma... I am running 44s on my 2.0 engine, stock rebuild but 8.0:1 P/C, MSD CD ignition and Kerry Hunter exhaust. This is for PCR racing. For the street, the 44s are too much carb as I can kill the engine just by flooring below 2500 RPM. I have had 40s as well and they made as much power, except the 44s had a SLIGHT edge at high RPM. But the 40s had DEFINITE better drivability. Plus, with higher intake velocity it will respond better to tuning at idle and part-throttle opening, I think. If mine were a street car, I would stay at 40s. That might change with a non-stock cam and head. Good luck! 
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Every corner a come-on, every downshift a kiss! |
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03-08-2002, 05:59 PM
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Join Date: Nov 2000
Location: Upper Back Bay Newport Beach California
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I only run 44's on my 2.0's I use a 284 duration cam w- 8.3 to1 and they will pull from 2k but they dont come on until 3k then she blasts to redline. I am going to up the comp to 8.7 to 1 and see how it works with 91 octane gas. Steve
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03-08-2002, 06:46 PM
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74 Porsche 914 2.0L 
1974 Porsche 914 2.0 l 4 Cyl. / 2.0 Liter 
1970 Porsche 914 2.0L 
