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74 2.7 dist?
Ok
I feel real stupid here and want to know what most that have converted to carbs already know. My 74 2.7 has been converted to carbs and runs well but sputters a little on transition of throttl postions. I have messed with it a little but have been very lazy as I spend a lot of time with the family rather than tunning the car. I noticed today that with the car warm I can disconect the vacum line from the distributor and the engine speed increases. I do plug the vacum line not confuse things. That to me means that timing is increasing. If thats the case with the vacum line connected the ignition is retarding? Did 74 911s not have a vacum advance but rather only a vacum retard and mechanical advance? if so that would explain a lot. Let me know your thoughts. Ben 77 911 3.0 75 914-6 2.7 |
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08-13-2003, 06:24 PM
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Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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Ben,
Vacuum module is retard only ... 10° at idle for emmisions compliance. Main distributor control function is centrifugal advance ... you need to check your advance curve with a timing light! The following thread has all of the pertinent data for your car ... it is the same distributor as was used on 1973 911T ... distributor lube...
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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08-13-2003, 07:54 PM
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Warren,
Do you think this would still work for me or should I install and earlier version? I suppose I could have it recurved but who would do it locally in Wisconsin? Ben |
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08-14-2003, 12:08 PM
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Join Date: Apr 2002
Location: Evansville, IN
Posts: 254
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I spent a lot of time and money trying to get my '73 911T with Webers tuned so they didn't spit and sputter. I finally bought a new distributor, sent it to Barry at International Auto Electric in Detroit to be recurved, installed it, set the dwell and timing and it hasn't missed a beat since. If only I had known it was that simple. The best $500 I ever spent. I recommend Barry (so does BA in his book). Let me know if you need his number.
Jim |
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08-14-2003, 05:44 PM
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Wow $500 seems like allot of money just to recurve. I used to recurve domestic stuff for $35 bucks or so. I have no doubt it is worth everysent but was there anything else wrong with your dist?
Ben |
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08-15-2003, 10:52 AM
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GAFB
Join Date: Dec 1999
Location: Raleigh, NC, USA
Posts: 7,842
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Hopefully the cost of the new distributor was part of that $500...
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Several BMWs |
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08-15-2003, 10:57 AM
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Thats what I thought>
Ben |
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08-15-2003, 11:05 AM
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Join Date: Apr 2002
Location: Evansville, IN
Posts: 254
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$500 was the total cost of (A) buying the new distributor and (B)having it recurved.
Jim |
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08-15-2003, 03:56 PM
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Thats a good deal. Can you tell me what the symtoms were of your car? Did it make a huge difference when returned as far as overall performance?
Ben |
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08-15-2003, 05:46 PM
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