Carb advice - 1966 - Stock 327
07-31-2016, 03:14 PM
#41
Team Owner
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veeeight (08-01-2016)
08-01-2016, 04:06 AM
#42
Instructor
Because the iron 300hp manifold took forever to get warm (heat to the base of the carburetor) compared to the aluminum 350hp manifold; the "hot-slot" took care of that shortcoming, but caused other problems (like engine fires on Q-Jet-equipped cars, which led to a huge recall), and the feature was cancelled in 1968.
08-01-2016, 02:02 PM
#43
Melting Slicks
08-01-2016, 02:18 PM
#44
Just to add to what John posted, the reason for the heat slot was to keep ice from forming around the throttle blade and throttle plate junction. With such small clearance in this area at idle and air at such high speed ice would form and change the A/F mixture causing stalling.
If you plug the holes which is recommend, at slow idle speeds you will notice a surging at idle until the plenum gets hot, that's the ice. You can usually set the idle higher to avoid this because it opens the gap between the blade and body.
If you plug the holes which is recommend, at slow idle speeds you will notice a surging at idle until the plenum gets hot, that's the ice. You can usually set the idle higher to avoid this because it opens the gap between the blade and body.
08-02-2016, 03:31 PM
#45
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08-02-2016, 03:59 PM
#46
Instructor
I have a 66 327 / 300 and recently sent my carb off to Jacksonville, American Carb, to have it remanufactured. It the carb numbers match the car and you intend to someday have the car judged, then you may want to consider having it remanufactured rather than replaced..
08-04-2016, 04:30 AM
#47
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FYI, I went to a NAPA store and asked for 7/16" cup plugs for the plugging of the holes. Got a deer in the headlights look. 
Asked for freeze plugs and rare good parts guy pulled out a book with TRW or FM parts and found a listing for everything from 1/4" up in various increments. He didn't have the 7/16", but there was a listing for 29/64" that he had ($.080 ea.). Bought two and looking at drilling the holes out to 29/64" and putting them in next time I pull the carb.
Asked for freeze plugs and rare good parts guy pulled out a book with TRW or FM parts and found a listing for everything from 1/4" up in various increments. He didn't have the 7/16", but there was a listing for 29/64" that he had ($.080 ea.). Bought two and looking at drilling the holes out to 29/64" and putting them in next time I pull the carb.
Last edited by R66; 08-04-2016 at 04:31 AM. Reason: added price
08-04-2016, 09:25 AM
#48
FYI, I went to a NAPA store and asked for 7/16" cup plugs for the plugging of the holes. Got a deer in the headlights look. Asked for freeze plugs and rare good parts guy pulled out a book with TRW or FM parts and found a listing for everything from 1/4" up in various increments. He didn't have the 7/16", but there was a listing for 29/64" that he had ($.080 ea.). Bought two and looking at drilling the holes out to 29/64" and putting them in next time I pull the carb.
Asked for freeze plugs and rare good parts guy pulled out a book with TRW or FM parts and found a listing for everything from 1/4" up in various increments. He didn't have the 7/16", but there was a listing for 29/64" that he had ($.080 ea.). Bought two and looking at drilling the holes out to 29/64" and putting them in next time I pull the carb.
08-04-2016, 01:35 PM
#49
Le Mans Master
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