Re: another dominator question
[Re: GEORGE68HEMIRR]
#301862
04/28/09 11:05 AM
04/28/09 11:05 AM
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Joined: Aug 2003
Posts: 43,741 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,741
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)
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Re: another dominator question
[Re: GEORGE68HEMIRR]
#301866
04/28/09 11:23 AM
04/28/09 11:23 AM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
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.
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Re: another dominator question
[Re: Quicktree]
#301869
04/28/09 11:49 AM
04/28/09 11:49 AM
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Joined: Mar 2004
Posts: 878 hudson valley n.y.
GEORGE68HEMIRR
OP
super street
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OP
super street
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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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
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Re: another dominator question
[Re: Cab_Burge]
#301870
04/28/09 11:51 AM
04/28/09 11:51 AM
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Joined: Mar 2004
Posts: 878 hudson valley n.y.
GEORGE68HEMIRR
OP
super street
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OP
super street
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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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
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Re: another dominator question
[Re: Quicktree]
#301872
04/28/09 03:35 PM
04/28/09 03:35 PM
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Joined: Mar 2004
Posts: 878 hudson valley n.y.
GEORGE68HEMIRR
OP
super street
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OP
super street
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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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
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Re: another dominator question
[Re: GEORGE68HEMIRR]
#301873
04/28/09 03:46 PM
04/28/09 03:46 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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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.
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Re: another dominator question
[Re: GEORGE68HEMIRR]
#301876
04/28/09 09:28 PM
04/28/09 09:28 PM
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Joined: Jan 2003
Posts: 12,814 Benton, IL.
DaveRS23
Master of nothing...
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Master of nothing...
Joined: Jan 2003
Posts: 12,814
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
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Re: another dominator question
[Re: GEORGE68HEMIRR]
#301878
04/28/09 09:29 PM
04/28/09 09:29 PM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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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.
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: another dominator question
[Re: sixpackgut]
#301879
04/28/09 09:41 PM
04/28/09 09:41 PM
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Joined: Mar 2004
Posts: 878 hudson valley n.y.
GEORGE68HEMIRR
OP
super street
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OP
super street
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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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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