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Author Topic:   Question for KP ! Or someone with the answer !
posted May 15, 2003 02:37 PM
Ok KP,
I ve raced for several years now and one of the most aggravating (?) things that sometimes happens to me.... I d like to try and resolve now..... The unused Vaccum ports on the Carb I d like to plug up or something.... Several times over the years I ve had problems with those stupid Vaccum caps splitting and leaking so I d like to eliminate this problem all together... What am I to do ?

posted May 15, 2003 02:51 PM
Simple answer. We use soft plugs of the appropriate sizes to permanently seal all unused ports after removing the vacuum tubes.
We also use (at times) lead plugs that are the same as the OEM plugs used in all carbs.
And for the occasional odd-ball sizes, we'll drill, tap, and install sKrew-in plugs with either Teflon or Loctite, depending...

We usually also plug the end of the throttle shaft hole (opposite the linkage, of course) to further eliminate the possibility of dirt entering the system.

Need plugs? or would you like your carb "plugged up"? Just let me know how I can help.


[This message has been edited by KPLugnut (edited May 15, 2003).]

posted May 15, 2003 03:04 PM

Ok see you said simple answer..... !
Those ports seem pretty tight, if ya ask me, and where can I get " SOFT PLUGS " just to plug up a couple of ports ? If you don t mind me asking... You ll get this carb at the end of the season but I need it right now, you ve done a 4412 for me and I m going to send it back for more very soon !

As always Kp THANKS !

posted May 15, 2003 03:15 PM
Well, "simple" as in let me know what ports you're talking about, and I'll send ya a little bag of plugs. :-)
Then just PM or email me (or call) and we can go thru how to get 'em in there.
The vacuum tubes are quite tight and the "caveman" way I get them out is to stick the tube itself in the vise jaws and squeeze it tight, then hold the carb body (or base) and twist a little. They usually pull right out.
The small ones usually can be plugged by using the same 1/4" plugs used in the top of metering blocks, and others are 5/16", while others are 3/8" like the brake vacuum port on the back of a 4412 baseplate.

Hope that helps,

posted May 15, 2003 09:53 PM
When I built my current Q-Jet I pulled all the vaccuum ports out and tapped them for set s crews. I dont remember what sizes I used for sure but I got them all from bomgars. They have a pretty good selection. No more leaks and it looks neat. I painted the main body black and polished the base plate to make it look like something special. Its always fun to mess with other peoples heads.

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