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| | | | Joined: Dec 2012 Posts: 201 Shop Shark | | Shop Shark Joined: Dec 2012 Posts: 201 | The '53 replacemet engine I put in my '46 2-ton came with a governor under the carburetor. It seems to be in good shape, it's clean on the inside and I could work the throttle plate in it by hand. There appears to be a connection point on the outside that a small tube would connect to. Where would the other end of such a tube go? Does the governor sense vacuum or pressure of some sort?
Since I actually use the truck I would like to protect the engine from over-revving. | | | | | Joined: Feb 2004 Posts: 29,748 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,748 | Governors are usually controlled by a special distributor with a speed-sensing device below the breaker plate that closes off the governor throttle plate with vacuum as a preset speed is reached. Unless you also have the correct distributor, you've only got half the system.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Ed, Does your governor look like this one? (48-52, and maybe 1953). Most likely, your carburetor is like the one at the link above. Here is the 1954 governor - it looks like the earlier one. The operation of that governor is described in those shop manuals. I do not see a mention of a speed-sensing device in the distributor, but I did not study the Shop Manuals very carefully. It looks to me like the adjustments are made in the governor assembly. The 47-55 GM governors that I have taken off of trucks up to 2-tons are as shown in those Shop Manuals (270 amd 261 engines). Are you missing the adjusting screw/cap and/or associated parts? Do you have the carburetor that came with the engine and governor? | | | | | Joined: Jul 2008 Posts: 326 'Bolter | | 'Bolter Joined: Jul 2008 Posts: 326 | Jerry
I'm pretty sure the earlier one barrel governors were mechanical. One of Tim's links has a good write up on the operational theory. I know the later four barrel governors were speed sensing off of the distributor tach signal.
SimS | | | | | Joined: Feb 2004 Posts: 29,748 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,748 | Yes, that link explains the operation pretty well. The 503 GMC I'm working on now has a distributor-controlled governor on a big 2-barrel Holley carb.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Dec 2012 Posts: 201 Shop Shark | | Shop Shark Joined: Dec 2012 Posts: 201 | Yes, tclederman, that looks like it. There is no cap, which is why I thought maybe it hooked up to something else. How hard are parts of this to come by? While it would be nice to have working, I don't have a lot of $ to spend on it. | | |
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