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12a intake mod's

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Old 04-26-09, 01:36 PM
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AB 12a intake mod's
I am having trouble tuning my carb and starting to think it is related to my intake manifold. I stripped my manifold removed the shutter valve and simply plugged the external ports. Do I need to plug the cross-over passages which join the primary and secondary runners?
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Old 04-26-09, 06:06 PM
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Originally Posted by ColinR
I am having trouble tuning my carb and starting to think it is related to my intake manifold. I stripped my manifold removed the shutter valve and simply plugged the external ports. Do I need to plug the cross-over passages which join the primary and secondary runners?
No! they are there to balance things. You probably have a vacuum leak.
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