Myself and a friend have two different three circuit dominators that act the same way. They idle fine, just off idle is fine. They both seem to run really rough and "blubber" a lot when at part throttle in the 2500-4000 or so rpm range. WOT is fine as well. My two circuit dominator doesn't do this at all. Is it going to take fine tuning the intermediate circuit with different air bleeds? Mine is an 1150HP, his is a 1050HP. Anyone else have this problem?

EXACTLY the complaint I had with a Dom 1050 #9375 on the street. Idled and ran great on a dyno. We tried EVERYTHING to correct the partial throttle "blubbering" as I've noted here numerous times before. I've actually used that description.
Ended up buying a King Demon RS. :thumbsup: Problem solved instantly!

You can restrict the intermdiate circuit or transfer slot. I installed transfer slot restrictors in the main body of my King Demon to cure that problem. I know Jim (540Hotrod) has recommended blocking of the intermediate circuit with the same results. Its just pulling too much fuel at part throttle. If you decide to go the intermediate route the only thing I would recommend is not messing with the air bleed/fuel pickup relationship of the int circuit. Leave the relationship the same and restrict it at the feed orifice where the metering block and main body meet.

I also have a HP1050 done by Braswell. It came with plugs and 92/93 jets. It also burbled at part throttle. This one I just installed PV's front and rear and dropped jets to 81/82 and the problem is gone. 81/82 + pv's gave same power and fuel curve as 89/90 + no pv's according to the wide band & chassis dyno.

EXACTLY the complaint I had with a Dom 1050 #9375 on the street. Idled and ran great on a dyno. We tried EVERYTHING to correct the partial throttle "blubbering" as I've noted here numerous times before. I've actually used that description.
Ended up buying a King Demon RS. :thumbsup: Problem solved instantly!
And I thought ''BLUBBERING'' was a term used by Whalers

And I thought ''BLUBBERING'' was a term used by Whalers

As an "Endangered Specie", only you would know! ;)

I have a 9375 reworked by Quick Fuel.
We told them the car was a street strip deal, and although it does blubber a bit when the engine is cold, it works perfectly when all warmed up.
Part throttle is fine.
They used a different booster in the primary to help with the signal to the booster.
I don't know what they did to the intermediate circuit, but it is still there.

Ron

I used two tiny machine screws and a drop of grease (to hold them it during assembly) behind the primary metering block to block the txfr tube in the carb body, moved the sec throttle blades to 90% of max opening (before binding against the primary blade cam slot), started with 1 turn out on all 4 idle screws - 6.5 power valve and 10 sizes down on the main jet (from dyno tune) on primary.

Set primary bowl float level up or down to set the transition rpm from idle to main circuit - this is gentle throttle opening that doesn't use a acc pump shot. Set "at cruise" mixture with main jets AFTER new float level is found.

I don't play with sec bowls/bleeds for a street tune - just use the dyno tuneup. If I'm into the secondaries it's usually only for a few seconds and under acceleration - so it being a tad rich isn't a bother for me.

Once your street jet / float level is set - put in a set of fresh plugs and take a 15 min 2200rpm and under cruise - pull the plugs - tweak idle screw to even up the color. Once the offsets are established, move all 4 screws in or out 1/8 turn at a time to allow the motor to start with no throttle or a slight touch of the throttle.

Record street setup baselines, then when you hit the track - go back to the dyno/track tuneup on the primary bowl/block. Leave throttle blades as they are.

I run alot of compression now, so I wouldn't trust my street tuneup under heavy loads (track) - esp since I know the fuel curve in right on with the original dyno tune.

MAT

My Camaro did that on the street untill I hooked the Vacc advance back up to manifold vacume.

Milan

Thanks for the help guys. It won't really be a street deal, maybe occasionally. I didn't even think of blocking the intermediate circuit as an option. I don't know if power valves will work with not much vacum to work with. It's worth a try though.
Thanks!

Pro-systems dominator = no blubber

As Mr Wilson said above, the intermediate feed is "jetted" at the main body and you can either take out the plug, plug it off, or drill it for anything in between.

I still ran square jetting and no power valves but got rid of all blubbering by restricting that intermed feed.

Pro-systems dominator = no blubber

As Mr Wilson said above, the intermediate feed is "jetted" at the main body and you can either take out the plug, plug it off, or drill it for anything in between.

I still ran square jetting and no power valves but got rid of all blubbering by restricting that intermed feed.

My dominator = $400.00. I haven't had it long and have only tried it on other peoples engines since my block is still in the machine shop. :( If I decide to keep it and can't get it lined out I may send it to Pro-Systems. Thanks again.

Cool, lot's of good Dom info in this thread. Those three-ckt Doms have always been sort of a PITA to get right on street cars as long as I remember.

I'm surprised Braswell would supply a Dom with PV plugs unless they thought it would be used for drag only with large, high RPM engine. I like those guys, they built me the best 850 alcohol carb I've ever seen. I had it for 10 years, haven't seen it for ten yearsbut I know where it is and it's still running good. Braswell roolz. :) "Course, helps that they are only about 100 miles down the freeway from me. more :)

Cool, lot's of good Dom info in this thread. Those three-ckt Doms have always been sort of a PITA to get right on street cars as long as I remember.

I'm surprised Braswell would supply a Dom with PV plugs unless they thought it would be used for drag only with large, high RPM engine. I like those guys, they built me the best 850 alcohol carb I've ever seen. I had it for 10 years, haven't seen it for ten yearsbut I know where it is and it's still running good. Braswell roolz. :) "Course, helps that they are only about 100 miles down the freeway from me. more :)

Tom, this particular Braswell was actually built/purchased for my 427 which I anticipate will be shifted around 78-8000. I'm just trying it out on my 422 for now. Very crisp carb!