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post #7 of (permalink) Old 07-05-2009, 10:45 PM
Join Date: Feb 2004
Location: Arizona
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TR, to gain proper baseplate vac signal when setting up a carb, since there are two barrels on the carb, is it suggested to drill/tap two holes, one for each barrel, on the adapter? This may make setting a carb properly a difficult task since the two throttle bores do not mix together until the plenum. A vac reading in each would be necessary for setting each needle, unless the two ports were to be tee'd together...

For determining valve issues, is drilling and tapping a port at each runner close to the cylinder head recommended? I would believe that to be a good place for cracks to develop due to the faster heating/cooling of the alluminum manifold compared to the cast steel head and their close proximity to eachother. But then again, multi port injectors are commonly placed around that same area.

'88 YJ
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