Whats wrong with my Carbs?, wants to stall leaving the traffic light. |
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Whats wrong with my Carbs?, wants to stall leaving the traffic light. |
HansJan |
Mar 25 2017, 09:12 PM
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#1
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Member Group: Members Posts: 394 Joined: 5-April 16 From: Sugar Land TX Member No.: 19,860 Region Association: Southwest Region |
Hello,
Not having much luck with the Search function. The car: 1972, with 103mm cylinders (2.3l), aftermarket cam and larger valves with double springs. Fuel supply: Dual EMPI HPMX 44 Carburetors, Jets: .55 Idle, 1.55 main, Air 1.75. History: After car-fire engine was out, heads taken off and some studs and springs replaced. Changed to quieter exhaust. Had trouble with dialing in the carburetors and changed the jets to the recommendations from EMPI (see above). It runs a lot better now. Remaining complaint; The car runs pretty good (especially above 2,800) RPM. However; It takes me a while to leave after each stop (stop signs traffic lights etc) because the car want to stall. When I push the accelerator to quickly the RPM dips down, and car will die. Only when I ease on the paddle very gently, it will increase in RPM, and I can lift clutch at above 1,500 RPM. Anyone here understands this issue? |
HansJan |
Mar 29 2017, 09:53 PM
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#2
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Member Group: Members Posts: 394 Joined: 5-April 16 From: Sugar Land TX Member No.: 19,860 Region Association: Southwest Region |
Thanks for your input.
I'm a little short on time to work on the car. Instead of learning about timing, I ordered #34 Venturi's (current size is #36). Just because that was something I could do while doing groceries. Not sure if this is related, but. The car also comes slow "off its RPM". Meaning when it runs at high RPM and I need to slow down (with foot of the accelerator and clutch pushed in, to downshift), or stop. The engine keeps spinning high for 2 or 3 more seconds. During up-shifts it sounds like I'm pushing the accelerator between shifts (not the case). Like I said: Not sure if its related, but worth noting. |
cgnj |
Mar 29 2017, 10:12 PM
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#3
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Senior Member Group: Members Posts: 623 Joined: 6-March 03 From: Medford, NJ Member No.: 403 Region Association: None |
Thanks for your input. I'm a little short on time to work on the car. Instead of learning about timing, I ordered #34 Venturi's (current size is #36). Just because that was something I could do while doing groceries. Not sure if this is related, but. The car also comes slow "off its RPM". Meaning when it runs at high RPM and I need to slow down (with foot of the accelerator and clutch pushed in, to downshift), or stop. The engine keeps spinning high for 2 or 3 more seconds. During up-shifts it sounds like I'm pushing the accelerator between shifts (not the case). Like I said: Not sure if its related, but worth noting. I bet you have hex bar linkage. Also webers are single handed. If you look at both of your carbs, you will see the one of them is not on the same end of the shaft as your linkage. I admit it, I'm a dell fan boy. They have right and left handed castings so this potential problem is avoided. CB sells a mod kit for this. There are other reasons that dells have the tuning advantage and its not flow out of the box. Thats a misconception because dell came with bigger vent that similar size webers. A clear exaple is a drla 40 came out of the box with 32 or 34 mm vents. The same weber came with 28mm. |
HansJan |
Mar 29 2017, 10:26 PM
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#4
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Member Group: Members Posts: 394 Joined: 5-April 16 From: Sugar Land TX Member No.: 19,860 Region Association: Southwest Region |
[quote name='Hans Jan' post='2469862' date='Mar 29 2017, 08:53 I bet you have hex bar linkage. Also webers are single handed. If you look at both of your carbs, you will see the one of them is not on the same end of the shaft as your linkage. I admit it, I'm a dell fan boy. They have right and left handed castings so this potential problem is avoided. CB sells a mod kit for this. There are other reasons that dells have the tuning advantage and its not flow out of the box. Thats a misconception because dell came with bigger vent that similar size webers. A clear exaple is a drla 40 came out of the box with 32 or 34 mm vents. The same weber came with 28mm. Indeed it has the Hex-bar linkage. Always imagine that it will be replaced with the Tangerine linkage setup. Who is CB? And what does this setup look like? |
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