anybody runnin dominator 1050hp ? having trouble with mine??
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anybody runnin dominator 1050hp ? having trouble with mine??

  1. #1
    mo balls than $cents$ IMPATIENT 1's Avatar
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    Default anybody runnin dominator 1050hp ? having trouble with mine??

    i finally took my tx out yesterday to break it in on the water and everything is doin great, but i've got a weird problem happenin at cruise speed where the carb wants to act like its a rev limiter. it is a 3 circuit deal, is this the 3rd circuit working at part throttle?? if i had to say, it would be in the 1/5th throttle position or about 3-4k range. sound just like a motor bouncing on its rev limiter, but as soon as the secondaries open, it quits. the carb doesn't hesistate 1 bit, works awesome outta the hole, but if i try to lay into it steady to reach a decent cruising speed, it starts with the banging out.

    is this normal for this carb?

    its a dominator 1050hp 8896 3 circuit with 88 in all 4 corners, no p/valve in the rear, a 5.5 p/valve up frt.

    mortec.com says its not supposed to have p/valves in it at all, wondering if taking the frt p/valve out and plugging it will help it maintain a steady rpm at cruise, this acting like a rev limiter isn't gonna be worth shit for cruising my kids around.

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    mo balls than $cents$ IMPATIENT 1's Avatar
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    not the best pic of the carb but the only 1 i have here at work
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    Senior Member hotbo's Avatar
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    tom call and ask for jesse at this #715-835-3726 i know he didnr set it up,but hes nice and might help you alot,he has me in the past,i just looked at dads spec card.3.5 pv in the front,rear nothingprimary shooter,front and rear .035

    air bleeds.idle .053-mid-.063-main bleeds-.040,jets were 85 front,92 rear i took the rear to 90 and the front to 82 just about right,idles all day cruises perfect and wot is perfect.

    dominators are contray creatures,hope this helps

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    It's what we do BDMarine's Avatar
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    Depending on the engine combination it can be very tricky to get a 3 circuit Dominator to run cleanly in the part throttle range.
    The times we had the same thing was a large cubic inch engine with smaller intake runners and really good air velocity. It ran really rich in the part throttle and missed. Could be what you are describing. We had to increase the intermediate air bleed size ALOT to get it to clean up.
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    If everything else is set right (float heights, baseline jetting, fuel pressure ect.) it sound like you need to lean out the third circuit. Try installing larger air bleeds in the third curcuit, or removing the third circuit air bleeds in the primaries. This should clean it up. Had the same problem with mine, 88-90 primary jets but no PV, ended up removing the third circuit airbleeds and it cleaned it right up. This may lean out WOT slightly in the primaries (a jet or two) but nothing significant.
    If you are running 1 to 1 linkage (IMHO you should be) you may have to do this in the secondaries also.

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    Resident Ford Nut Sleeper CP's Avatar
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    I would try a 4.5 or 3.5 PV just incase, but if the plug's aren't getting fouled that is more than likely not the problem.

    Off Topic: Does anyone remember the link or contact for the rebuilt Holley (reman) carbs that were nearly half price ?

    Sleeper CP

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    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by BDMarine View Post
    Depending on the engine combination it can be very tricky to get a 3 circuit Dominator to run cleanly in the part throttle range.
    The times we had the same thing was a large cubic inch engine with smaller intake runners and really good air velocity. It ran really rich in the part throttle and missed. Could be what you are describing. We had to increase the intermediate air bleed size ALOT to get it to clean up.
    i called alstate and that's what they told me also. they wanted me to remove the center air bleed(3rd circuit bleed) and see if it cleans up the issue. also recommended putting the p/valve back in the rear and tuning the frt to match cruise speeds. i had planned on doin that yesterday, i brought my vaccuum gauge but when i noticed the banging out, i didn't check intake vaccum under the carb to see what p/v i needed to be runnin. its got a 5.5 up frt now, nothing in the back. may have to drop to a 2.5 up frt, put the 5.5 back in the rear.

    sooo, i think its rich on the 3rd circuit and i'll remove the bleeds, and if that helps, i'll order some bigger 1's to lean it out some.hope it works and doesn't affect how this carb is working outta the hole, its a awesome carb to race with.
    Last edited by IMPATIENT 1; 04-17-2008 at 09:46 AM.

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    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by Warp Speed View Post
    If everything else is set right (float heights, baseline jetting, fuel pressure ect.) it sound like you need to lean out the third circuit. Try installing larger air bleeds in the third curcuit, or removing the third circuit air bleeds in the primaries. This should clean it up. Had the same problem with mine, 88-90 primary jets but no PV, ended up removing the third circuit airbleeds and it cleaned it right up. This may lean out WOT slightly in the primaries (a jet or two) but nothing significant.
    If you are running 1 to 1 linkage (IMHO you should be) you may have to do this in the secondaries also.
    yep, 1 to 1 linkage but i set the rear to open just a **** hair after the frt so i could cruise thru no wake zones without dumping too much fuel. i agree with ya on the bleed size, i think that and a p/valve change is gonna fix it, i hope

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    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by Sleeper CP View Post
    I would try a 4.5 or 3.5 PV just incase, but if the plug's aren't getting fouled that is more than likely not the problem.

    Off Topic: Does anyone remember the link or contact for the rebuilt Holley (reman) carbs that were nearly half price ?

    Sleeper CP
    i made 1 w.o.t. pass and shut it down, pulled out cyls 5/7/2/8 and they were burin great, i'll check them all tonite. i earned a nice big ole header kiss checking number 7 feels like summer guys!!!!!

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    Do not I repeat Do not install a PV in the rear. It will unload under high acceleration and you will lean your engine out. You should consider jet extensions, also do you have high flow needle and seats installed?

    What size engine and what rpm do you what to rev to ?

    Sleeper CP

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    Senior Member Notalent's Avatar
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    Quote Originally Posted by Sleeper CP View Post
    I would try a 4.5 or 3.5 PV just incase, but if the plug's aren't getting fouled that is more than likely not the problem.

    Off Topic: Does anyone remember the link or contact for the rebuilt Holley (reman) carbs that were nearly half price ?

    Sleeper CP
    There is a place in Lakewood, CA called Carburetor Land. They do great work and are VERY reasonably priced. I have used them 4 or 5 times and never a problem. Its been a couple years....think it was $100 for a 750 double pumper. Here is the website:

    http://net33.com/carbland/
    "Pain is a figment of your Imagination"

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    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by Sleeper CP View Post
    Do not I repeat Do not install a PV in the rear. It will unload under high acceleration and you will lean your engine out. You should consider jet extensions, also do you have high flow needle and seats installed?

    What size engine and what rpm do you what to rev to ?

    Sleeper CP
    yes i have jet extensions, i had to install a notched float because the "carb shop man" didn't do it and i caught that when i was setting float level. i just couldn't get it to set without flooding from a booster so i took it apart and sure enough, the unnotched float was setting ontop of the jet extensions.i had a notched float so i stuck it in and solved that issue.

    man i wish i'd bought headers with a o2 bung , i could be doin all this with my a/f meter noway am i gonna have a bung tigged in on brand new coated headers though. i may put my old headers back on so i can see a/f ratio, i've got bungs in both those headers and my a/f meter is decent enough to rough tune by.

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    Make one change at a time!!!!!
    First try the 3rd circuit bleeds, and then maybe down a flat or two on the primary float level. Depending on engine and boat angle, "at the window" primary float levels are usualy to high.
    It definetly sounds like it is "dirty" in the cruise area and this should fix it without changing the overall tune much at all.

    Jet extensions (secondary side), high flow needle and seats (should be .130's for a 800+ HP single carb anyway) are a good thing, but they are in the opposite direction of the problem at hand. If it was a lean condition it would be surging at this throttle application. Blubbering (rev chip sound) is a rich condition. The 3rd circuit and a little float adjustment should fix it.

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    Yes I brought up seperate issue, I just wanted him to okay with the Hi-flow needle and seat's when he installs his 300 hp Nos system. But yes seperate issue from the one on hand.

    But, do not put a P/V in the secondaries.

    Sleeper CP

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    Going fast is only half the fun ... what you make go
    fast is the other half.
    " A Government big enough to give you everything you want is big enough to take away everything you have"

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