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Iain M.

Intake manifold

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Here's another (probably stupid) question - recently got an NOS intake manifold for my 47 LC from a forum member & it has 4 bolt holes for the carb as opposed to the 3 on the old one. My engine guy tells me he can build an adapter plate with no problem, but I'm wondering why the difference??

Iain

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Hello Iain four bolt carb base was used in 1942 thru 1948 Lincoln V-12 motors, best to get a four bolt base and change it out. I also have NOS spacer for four-bolt application -

Jim

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I have seen ( factory?) replacement 3 bolt intake manifolds that had the same design as the 4 bolt design used from '42. These manifolds had an "improved" heat riser design and seem to eliminate the burn-thru problems the original intakes experienced. They looked just the same as the '42 to '48 manifolds other than the fact they only had 3 mounting studs for the early carbs. The 3 bolt carbs were jetted a tad leaner, maybe one of the reasons why the '41's won the Gilmore Economy run along with the double overdrives?

Edited by peecher (see edit history)

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