Weber 44 IDF Question |
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Weber 44 IDF Question |
orbit398 |
Nov 1 2016, 09:57 AM
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#1
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Member Group: Members Posts: 139 Joined: 29-April 15 From: League city, Texas Member No.: 18,681 Region Association: Southwest Region |
Just looking to see if someone can help pin point an issue I am having – assume it’s a carb issue.
Here is what I have: 2.0 liter with flat top pistons (euro style), has ~160 psi on all cylinders, carb cam, bursch exhaust, dual Weber 44 IDF carb set up, idle jet = 55, main jet = 145, F11 emulsion tube, 200 air correction. Carbs are synced and pull the same at idle as well as about 1500. I live in Houston (sea level). I have read and followed several write-ups on tuning the Weber carbs. Overall, the car runs great above about 2200 rpm. It idles excellent. Issue: Still getting the occasional popping. More importantly, while under easy acceleration (throttle slightly opened/just limping along in traffic) ~around 2000/2200 rpm, the engine seems to be missing or it shutters. If I open the throttle just a bit more, it disappears and runs great. I cannot replicate this by just revving the motor up in neutral; does this only under a load?? What could be the issue here? I plan to recheck synchronization/insure carbs pulling equally, spray carb cleaner/starter fluid to check for air leaks, try to ensure butterflies are opening equally. Just puzzled at what it could be. |
HansJan |
Nov 3 2016, 09:07 PM
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#2
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Member Group: Members Posts: 395 Joined: 5-April 16 From: Sugar Land TX Member No.: 19,860 Region Association: Southwest Region |
My car with new dual 44mm EMPI carbs linked with a Crossbar (103mm cylinders) is popping like crazy as well. The mechanic wants to open up the valve gaps.
Is that making sense to the brain-trust, as a solution to this problem? or is it solely an issue with the adjustments of the carbs? |
IronHillRestorations |
Nov 4 2016, 08:10 AM
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#3
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I. I. R. C. Group: Members Posts: 6,724 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None |
My car with new dual 44mm EMPI carbs linked with a Crossbar (103mm cylinders) is popping like crazy as well. The mechanic wants to open up the valve gaps. Is that making sense to the brain-trust, as a solution to this problem? or is it solely an issue with the adjustments of the carbs? I'd want to make sure the carbs were tuned dead on the nuts before anything else. I've had a few cars in with different types cross bar linkage set ups that ran fine and sync'd up good enough to run without trouble. Foley's cable system is well engineered and works nice. The one (hot rod) engine I've had in my shop had it, and the pulleys made plug changes really difficult. |
stugray |
Nov 4 2016, 08:48 AM
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#4
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Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
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