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12-29-2019, 05:55 AM | #61 | |
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Re: Unusual carburation on Flathead V8’s
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12-29-2019, 08:37 AM | #62 |
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Join Date: May 2010
Location: Chester Vt
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Re: Unusual carburation on Flathead V8’s
I tink the Weber is a direct bolt on to the flathead. The reason is Kenny Web ran one at Danbury and the rules stated that you could run any carb that bolted on the stock intake.
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12-29-2019, 01:46 PM | #63 |
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Join Date: Apr 2019
Location: Kansas
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Re: Unusual carburation on Flathead V8’s
Rochester 2GV on a '50's Merc 4 bolt manifold. As tubman said,the carb mounts backward and the linkage lines up nicely. This carb is from a late '60's Chev.
As for any carb other than stock working with the late flathead distributor, that's going to be a no-go. The stock load-a-matic distributor used a combination of venturi and manifold vacuum sourced from unique drillings in the stock carb. Ported vac will not work properly and neither will full manifold vac. A distributor swap will be needed to make things right. Terry
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12-31-2019, 11:04 AM | #64 | |
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Location: Conifer, Colorado
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Re: Unusual carburation on Flathead V8’s
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12-31-2019, 11:32 AM | #65 |
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,303
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Re: Unusual carburation on Flathead V8’s
Just a side note. While a small base Rochester 2G will bolt directly on to a Mercury manifold, the throttle bores in the manifold are smaller than the carburetor (1 5/i6" vs. 1 7/16"). I bore the manifolds to 1 7/16" all the way down with a "Rota-Broach" using a special guide I made. As mentioned above, the throttle linkage and fuel line are positioned correctly if the carburetor is mounted backwards. Unfortunately, this puts the manual choke in the wrong position. However, the Mercury automatic choke mechanism is positioned exactly right for use with a 2G. I have done both the on-carb choke (2GC with an early manifold) and the divorced choke version (2GV on a later manifold) and both require only minor modifications to make them work.
And of course, all of this precludes using the original distributor. |
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