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another dominator question #301860
04/28/09 10:48 AM 04/28/09 10:48 AM
Joined: Mar 2004
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hudson valley n.y.
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GEORGE68HEMIRR Offline OP
super street
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hudson valley n.y.
primary side of dominator....rev it up and when she backs down to idle gas dumps out vent tube.....what would cause that?....thanks
Re: another dominator question [Re: GEORGE68HEMIRR] #301861
04/28/09 10:57 AM 04/28/09 10:57 AM
Joined: Jan 2003
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Akron, Ohio
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Might need new needles/seats.

Re: another dominator question [Re: GEORGE68HEMIRR] #301862
04/28/09 11:05 AM 04/28/09 11:05 AM
Joined: Aug 2003
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Bend,OR USA
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The needle is not holding the fuel level properly if it allows the fuel bowl to overfill and flood out the vent tube BTW, is this motor using a mechanical fuel pump? If so maybe the pump has to much pressure when it is above a certian RPM If it is a electric pump only it might be the same thing, to much pressure for the needle and seat to hold

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: another dominator question [Re: Cab_Burge] #301863
04/28/09 11:17 AM 04/28/09 11:17 AM
Joined: Mar 2004
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hudson valley n.y.
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GEORGE68HEMIRR Offline OP
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hudson valley n.y.
i am running a 250 mallory electric pump
to a bg 4 port fuel pressure gauge with a guage which is set at 8.5 then i have a gauge at the front 1050 which reads 7 psi....the rear carb on primary side is the one dumping fuel....should i back down the pressure at the carb reading to 6.5??....just replaced all new needle and seats and power valves...thanks
Re: another dominator question [Re: GEORGE68HEMIRR] #301864
04/28/09 11:19 AM 04/28/09 11:19 AM
Joined: Aug 2003
Posts: 43,207
Bend,OR USA
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If it is only one needle leaking get rid of it, try using the .110 or bigger needle and seat on all of the fuel bowls, if you don't have them already

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: another dominator question [Re: Cab_Burge] #301865
04/28/09 11:22 AM 04/28/09 11:22 AM
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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GEORGE68HEMIRR Offline OP
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okay i have a 120 needle and seat....i could clean old one and see what happens and i will also look at new one maybe a can see a speck of dirt....thanks
Re: another dominator question [Re: GEORGE68HEMIRR] #301866
04/28/09 11:23 AM 04/28/09 11:23 AM
Joined: Jan 2003
Posts: 32,394
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Quote:

i am running a 250 mallory electric pump
to a bg 4 port fuel pressure gauge with a guage which is set at 8.5 then i have a gauge at the front 1050 which reads 7 psi....the rear carb on primary side is the one dumping fuel....should i back down the pressure at the carb reading to 6.5??....just replaced all new needle and seats and power valves...thanks



I hope that is a return type regulator. if not there's your problem.
Re: another dominator question [Re: GEORGE68HEMIRR] #301867
04/28/09 11:24 AM 04/28/09 11:24 AM
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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GEORGE68HEMIRR Offline OP
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what would be the max psi i should be running and should the 4 port fuel pressure regulator have a different reading the the carb side??
Re: another dominator question [Re: GEORGE68HEMIRR] #301868
04/28/09 11:38 AM 04/28/09 11:38 AM
Joined: Jan 2003
Posts: 32,394
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is it a return regulator????? 7#s
Re: another dominator question [Re: Quicktree] #301869
04/28/09 11:49 AM 04/28/09 11:49 AM
Joined: Mar 2004
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hudson valley n.y.
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GEORGE68HEMIRR Offline OP
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hudson valley n.y.
Quote:

is it a return regulator????? 7#s


no the return is at the pump and also have a aeromotive fuel pump controller which regulates from rpms and can switch to direct pump for the track
Re: another dominator question [Re: Cab_Burge] #301870
04/28/09 11:51 AM 04/28/09 11:51 AM
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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GEORGE68HEMIRR Offline OP
super street
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Quote:

If it is only one needle leaking get rid of it, try using the .110 or bigger needle and seat on all of the fuel bowls, if you don't have them already

i have 120 needle and seats now...i will change the one...thanks
Re: another dominator question [Re: GEORGE68HEMIRR] #301871
04/28/09 02:57 PM 04/28/09 02:57 PM
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the mallory 250 was designed to use a return system. although I think I remember somebody by-passing at the pump. dead heading it could cause a problem imo.
Re: another dominator question [Re: Quicktree] #301872
04/28/09 03:35 PM 04/28/09 03:35 PM
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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GEORGE68HEMIRR Offline OP
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Quote:

the mallory 250 was designed to use a return system. although I think I remember somebody by-passing at the pump. dead heading it could cause a problem imo.



the pump is in the truck and the by-pass goes directly to the fuel cell
Re: another dominator question [Re: GEORGE68HEMIRR] #301873
04/28/09 03:46 PM 04/28/09 03:46 PM
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Quote:

Quote:

the mallory 250 was designed to use a return system. although I think I remember somebody by-passing at the pump. dead heading it could cause a problem imo.



the pump is in the truck and the by-pass goes directly to the fuel cell



I know what your saying but thats not the best method imo. call mallory and see what they tell you.
Re: another dominator question [Re: Quicktree] #301874
04/28/09 09:14 PM 04/28/09 09:14 PM
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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GEORGE68HEMIRR Offline OP
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this has been working since 1998......i am still having problems....change out power valves which pro-system install when they built the 1050s... i put in new 120 needle and seats....i had gas dumping out the bowl vents....like i said new power valves and went back to the old needle and seats[cleaned them off with cab cleaner and blew them off]...so i set floats low and took it for a ride....ran great for a while cruising at 60mphs...went through town at 30mphs and hit the 55mile an hour zone on jumped into it....it stumpled like it was loaded up....went back to the house and raised float level to just below the sight hole....did the same thing and even died when i pulled out of a store after shutting it down for 10 minutes .....seems like it flooded out....floored it and it started up...checked float level again and its just below sight hole.....anybody have any suggestions??? timing set at 34 total timing and temp is around 200-210...usually ran around 180 with anti-freeze...water wetter/water now....also i am running 6 psi at the carbs
Re: another dominator question [Re: GEORGE68HEMIRR] #301875
04/28/09 09:26 PM 04/28/09 09:26 PM
Joined: Dec 2008
Posts: 1,200
UK
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Maybe the fuels boiling in the bowls , seems like the only thing that's changed is temp.
Re: another dominator question [Re: GEORGE68HEMIRR] #301876
04/28/09 09:28 PM 04/28/09 09:28 PM
Joined: Jan 2003
Posts: 12,131
Benton, IL.
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What a coincidence! I am experiencing the same thing. My Dom has been fine for years and now, all of a sudden, it overflows out the vent after reving hard. I have changed the press reg setting, changed the float, changed the needle and seat and adjusted the float setting several different ways. The overflow is hit and miss, not all the time. I don't understand why this has started now and why I can't get a handle on it. If you find out what is going on, make sure to post it on here.

Master, again and still
Re: another dominator question [Re: GEORGE68HEMIRR] #301877
04/28/09 09:28 PM 04/28/09 09:28 PM
Joined: Jan 2003
Posts: 32,394
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I don't think you can control pressure with that pump by-passing it at the pump. pm robbmc (board member) and talk to him about it and your problem.
Re: another dominator question [Re: GEORGE68HEMIRR] #301878
04/28/09 09:29 PM 04/28/09 09:29 PM
Joined: Jun 2003
Posts: 9,225
Charleston
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sixpackgut Offline
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Charleston
acc pump diaphrams need replacing check valve under squirter stuck in crud

dirt or crud

are the 120 needle an seats the viton or steel? the steel ones dont seal to well and i would never use them on a street car

Last edited by sixpackgut; 04/28/09 09:42 PM.
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Re: another dominator question [Re: sixpackgut] #301879
04/28/09 09:41 PM 04/28/09 09:41 PM
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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GEORGE68HEMIRR Offline OP
super street
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hudson valley n.y.
Quote:

acc pump diaphrams need replacing

dirt or crud

are the 120 needle an seats the viton or steel? the steel ones dont seal to well and i would never use them on a street car



the 120 needle and seats are viton...acc pumps seem to be dumping out fuel fine and by the way i am running 93 pump gas if that matters
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