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#394502 - 09/01/17 09:20 AM Carburetor Insulator
Rusty 37 Master Offline
Backyard Mechanic

Registered: 12/29/07
Posts: 356
Loc: Iowa
Helping my friend with his '54 3100 4 speed pickup. It has what appears to be the original Rochester Model B manual choke carburetor.

Was there an insulator between the carburetor and the intake manifold on this engine originally?

The reason for the question is that someone added an extension to the vertical rod that connects the bell crank on the block to the throttle lever on the carburetor. This short piece appears to be a part of a throttle rod that is welded to the original rod one and has the connecting bend about 1" higher than the original. That height difference is about the thickness of the insulator.

Thanks for the help!
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Rusty

VCCA #44680

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Chevy Trucks
#394522 - 09/01/17 02:54 PM Re: Carburetor Insulator [Re: Rusty 37 Master]
Chev Nut Offline




Registered: 01/08/02
Posts: 24490
Loc: West Allis,Wi.

YES, and the insulator (readilly available) must be used under a Rochester carburetor as there is a vaccumm port under the carb. base that must be exposed to the vaccumm
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Chevgene

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#394594 - 09/03/17 10:29 AM Re: Carburetor Insulator [Re: Chev Nut]
Rusty 37 Master Offline
Backyard Mechanic

Registered: 12/29/07
Posts: 356
Loc: Iowa
Thanks Gene!

There is an insulator installed now and the engine runs well.

So now we need to figure out what linkage should really be there. This one is somewhat complicated by the fact that he has a Fenton split exhaust on it. The outlet that attaches to the port between #4 and #5 appears to interfere with the original linkage travel.
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VCCA #44680

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#394620 - 09/03/17 07:40 PM Re: Carburetor Insulator [Re: Rusty 37 Master]
Mothertrucker Offline

Oil Can Mechanic

Registered: 01/05/02
Posts: 713
Loc: Rust Free Arizona VCCA#37127
Originally Posted By: Rusty 37 Master


So now we need to figure out what linkage should really be there. This one is somewhat complicated by the fact that he has a Fenton split exhaust on it. The outlet that attaches to the port between #4 and #5 appears to interfere with the original linkage travel.



There is a new linkage kit that is specifically designed to fix that problem.
Follow the link here....

https://www.jalopyjournal.com/forum/thre.../#post-12206705


.

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#394624 - 09/03/17 08:17 PM Re: Carburetor Insulator [Re: Mothertrucker]
XLVIIdriver Offline

Oil Can Mechanic

Registered: 01/20/09
Posts: 518
Loc: PA.
I don't believe he has dual carbs.

Dick

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#394627 - 09/03/17 08:49 PM Re: Carburetor Insulator [Re: XLVIIdriver]
Rusty 37 Master Offline
Backyard Mechanic

Registered: 12/29/07
Posts: 356
Loc: Iowa
That is correct. The truck has a single Rochester B carb on a stock intake manifold.
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VCCA #44680

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