Am I Over Carbed?, Dual Weber 40 IDFs on 1.7 |
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Am I Over Carbed?, Dual Weber 40 IDFs on 1.7 |
7TPorsh |
Aug 25 2014, 10:52 AM
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#1
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7T Porsh Group: Members Posts: 2,691 Joined: 27-March 06 From: Glendale Ca Member No.: 5,782 Region Association: Southern California |
I have been trying to drive my car comfortably but I am running across issues. Mainly after the car warms up it starts acting weird.
Coming to a stop and revs dropping. it just dies. Then I have to wait a minute or two to get started again. Then it runs a little rough, pops, backfires. Just did the valves, points, timing but runs like crap when hot. The engine is a 1.7 block with 1.7 heads and dual 40s. I don;t know if there was any work done internally but the block is a 71 and car is a 70. It has been suggested that I am way overcarbed and running rich. i have no plans of building out this motor to match the carburation. Am I better off selling off this dual weber set and putting on a single Weber 32/36? I have my eye on this: http://www.ebay.com/itm/310953732343?ssPag...984.m1423.l2649 I am thinking the weber and hex setup should be worth around $450? What say you? |
stugray |
Aug 27 2014, 10:22 AM
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#2
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Advanced Member Group: Members Posts: 3,824 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
Next check all of the jets and write down the numbers while you do it.
Dont just blow through them. Inspect them FIRST then clear them. Dont use any wire or anything to clear the passages. The mains come out the top on the tall brass tubes. Write down the numbers on the tall brass tubes as well. The idle jets are on the outside of the carbs near the top and are kind of hard to get to. Use a mirror and verify the o-rings stay in place on the carb body ( and that they are there in the first place). They are usually green. Clear the idle jets, write down the number and screw them back in gently (do not over tighten). Use the mirror to make sure they are all seated to the same depth. Report back with the numbers and if clearing them all makes a difference. Also while looking down the barrels, turn the throttle linkage and verify that you see a squirt down each barrel and that they are approximately the same. These are the acceleration pumps (the phallic shaped thing directly in front of the number in your pic above) Finally after all that, you should check the float levels ( as mentioned above), but that requires you to take the linkage off and remove the tops of the carbs. I never do that unless I already have a spare set of carb-top gaskets. There is a chance you will tear one especially if it is your first time. |
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