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| Carb mixture and vacuum https://slantsix.org/forum/viewtopic.php?f=26&t=60213 |
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| Author: | gdizzle [ Fri Sep 23, 2016 3:56 pm ] |
| Post subject: | Carb mixture and vacuum |
Well on my carter bbd, 225ci, I hooked up a vacuum gauge directly to a port that sticks up off the intake manifold. It is giving me a solid 23 in. I am trying to set idle mixture, watching gauge but the only time I see and hear something happen is if I turn the screws bascially all the way in, if I start backing them off I never see or hear a change, so much so that the screws are about to fall out. All the info I read says that when you back them out , at some point the engine starts to bog down again.??? Maybe I have too much vacuum?? |
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| Author: | Joshie225 [ Fri Sep 23, 2016 3:59 pm ] |
| Post subject: | |
Many emissions carburetors have a very small idle mixture change with the adjustment needles. If you tried what you have with an aftermarket Holley non-emission carb you could easily flow enough fuel to bog the engine as the needle adjustment makes a large difference and the idle circuit will flow plenty of fuel. |
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