Posted By: GEORGE68HEMIRR
another dominator question - 04/28/09 02:48 PM
primary side of dominator....rev it up and when she backs down to idle gas dumps out vent tube.....what would cause that?....thanks
another dominator question
Posted By: ProSport
Re: another dominator question - 04/28/09 02:57 PM
Might need new needles/seats. 
Posted By: Cab_Burge
Re: another dominator question - 04/28/09 03:05 PM
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
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
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/28/09 03:17 PM
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
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
Posted By: Cab_Burge
Re: another dominator question - 04/28/09 03:19 PM
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 
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/28/09 03:22 PM
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
Posted By: Quicktree
Re: another dominator question - 04/28/09 03:23 PM
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.
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/28/09 03:24 PM
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??
Posted By: Quicktree
Re: another dominator question - 04/28/09 03:38 PM
is it a return regulator????? 7#s
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/28/09 03:49 PM
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
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/28/09 03:51 PM
Quote:i have 120 needle and seats now...i will change the one...thanks
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
Posted By: Quicktree
Re: another dominator question - 04/28/09 06:57 PM
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.
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/28/09 07:35 PM
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
Posted By: Quicktree
Re: another dominator question - 04/28/09 07:46 PM
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.
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/29/09 01:14 AM
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
Posted By: 602heavy
Re: another dominator question - 04/29/09 01:26 AM
Maybe the fuels boiling in the bowls , seems like the only thing that's changed is temp.
Posted By: DaveRS23
Re: another dominator question - 04/29/09 01:28 AM
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.
Posted By: Quicktree
Re: another dominator question - 04/29/09 01:28 AM
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.
Posted By: sixpackgut
Re: another dominator question - 04/29/09 01:29 AM
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
check valve under squirter stuck in cruddirt 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
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/29/09 01:41 AM
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
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/29/09 01:44 AM
Quote:
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.
like i said this pump and fuel system i have been using for years without any problems
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/29/09 01:47 AM
Quote:
Maybe the fuels boiling in the bowls , seems like the only thing that's changed is temp.
thats what i am wondering also...the temp seems high but not overheating.....is this water wetter any good?....it ran cooler on anti-freeze
Posted By: sixpackgut
Re: another dominator question - 04/29/09 02:21 AM
are we talking about dual doms or just one? on what intake?
are you saying the flooding problem out of the vent is fixed now and you just have a stumble?
are you saying the flooding problem out of the vent is fixed now and you just have a stumble?
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/29/09 02:34 AM
Quote:
are we talking about dual doms or just one? on what intake?
are you saying the flooding problem out of the vent is fixed now and you just have a stumble?
yes dual 1050 dominators on a indy tunnel ram.....it doesnt seem to be dumping out the vents[have a bds scoop on and didnt see gas running out the back like i did before/ was at nite on the road....but it is stumbling like its shutting down and did die....seemed flooded....had to floor it to clear it up and started after a minute or so
Posted By: sixpackgut
Re: another dominator question - 04/29/09 02:43 AM
Quote:Quote:
are we talking about dual doms or just one? on what intake?
are you saying the flooding problem out of the vent is fixed now and you just have a stumble?
yes dual 1050 dominators on a indy tunnel ram.....it doesnt seem to be dumping out the vents[have a bds scoop on and didnt see gas running out the back like i did before/ was at nite on the road....but it is stumbling like its shutting down and did die....seemed flooded....had to floor it to clear it up and started after a minute or so
hard to say its the heat then. i think its a check valve under a squirter thats causing the problem.
a blown power valve will let gas drip down the vac port hole and flood the engine but you would notice that cruising
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/29/09 03:12 AM
Quote:Quote:Quote:
are we talking about dual doms or just one? on what intake?
are you saying the flooding problem out of the vent is fixed now and you just have a stumble?
yes dual 1050 dominators on a indy tunnel ram.....it doesnt seem to be dumping out the vents[have a bds scoop on and didnt see gas running out the back like i did before/ was at nite on the road....but it is stumbling like its shutting down and did die....seemed flooded....had to floor it to clear it up and started after a minute or so
hard to say its the heat then. i think its a check valve under a squirter thats causing the problem.
a blown power valve will let gas drip down the vac port hole and flood the engine but you would notice that cruising
earlier today when the gas was gushing out the vents i noticed gas coming out the primary squirter like its was boiling...it would squirt then stop then did it like 4-5 times....engine was off and everything was shut down when it was doing it.......it was 90 degrees here today.....the power valves are brand new....just put them in today....no back fires either.....just stumbing as i am jumping into it.....then it takes off.....what i dont get is after driving it....shut it off for about 10 minutes.....started up fine and jumped into it and died after 100 feet
Posted By: sixpackgut
Re: another dominator question - 04/29/09 03:29 AM
Quote:Quote:Quote:Quote:
are we talking about dual doms or just one? on what intake?
are you saying the flooding problem out of the vent is fixed now and you just have a stumble?
yes dual 1050 dominators on a indy tunnel ram.....it doesnt seem to be dumping out the vents[have a bds scoop on and didnt see gas running out the back like i did before/ was at nite on the road....but it is stumbling like its shutting down and did die....seemed flooded....had to floor it to clear it up and started after a minute or so
hard to say its the heat then. i think its a check valve under a squirter thats causing the problem.
a blown power valve will let gas drip down the vac port hole and flood the engine but you would notice that cruising
earlier today when the gas was gushing out the vents i noticed gas coming out the primary squirter like its was boiling...it would squirt then stop then did it like 4-5 times....engine was off and everything was shut down when it was doing it.......it was 90 degrees here today.....the power valves are brand new....just put them in today....no back fires either.....just stumbing as i am jumping into it.....then it takes off.....what i dont get is after driving it....shut it off for about 10 minutes.....started up fine and jumped into it and died after 100 feet
well that sounds like fuel boiling problem but the carbs that high off the engine, i dont know. could be the way fuel lines are routed. everyone is complaining about this issue lately but i had that issue a long time ago, solved the problem with a return style regulator
you will hear the fuel perculating in the bowls, there is not mistaking it. its loud enough to hear clearly but just a good old fashion carb rebuild is what i think it may need. umbrella plunger in the pump housing is another possible problem
Posted By: Cab_Burge
Re: another dominator question - 04/29/09 03:39 AM
Sounds like you have a bad tank of gasoline, it is boiling and trying to vapor lock,IMO
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/29/09 03:48 AM
Quote:
Sounds like you have a bad tank of gasoline, it is boiling and trying to vapor lock,IMO
wow i never thought of that.....i will change that tomorrow.....you really think so.....its mobil..93
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/29/09 03:53 AM
Quote:i will change them and the gas tomorrow....thanks....i will keep everyone posted.....we rented lebanon valley friday so i am hoping to get this done before friday....cutting it closeQuote:Quote:Quote:Quote:
are we talking about dual doms or just one? on what intake?
are you saying the flooding problem out of the vent is fixed now and you just have a stumble?
yes dual 1050 dominators on a indy tunnel ram.....it doesnt seem to be dumping out the vents[have a bds scoop on and didnt see gas running out the back like i did before/ was at nite on the road....but it is stumbling like its shutting down and did die....seemed flooded....had to floor it to clear it up and started after a minute or so
hard to say its the heat then. i think its a check valve under a squirter thats causing the problem.
a blown power valve will let gas drip down the vac port hole and flood the engine but you would notice that cruising
earlier today when the gas was gushing out the vents i noticed gas coming out the primary squirter like its was boiling...it would squirt then stop then did it like 4-5 times....engine was off and everything was shut down when it was doing it.......it was 90 degrees here today.....the power valves are brand new....just put them in today....no back fires either.....just stumbing as i am jumping into it.....then it takes off.....what i dont get is after driving it....shut it off for about 10 minutes.....started up fine and jumped into it and died after 100 feet
well that sounds like fuel boiling problem but the carbs that high off the engine, i dont know. could be the way fuel lines are routed. everyone is complaining about this issue lately but i had that issue a long time ago, solved the problem with a return style regulator
you will hear the fuel perculating in the bowls, there is not mistaking it. its loud enough to hear clearly but just a good old fashion carb rebuild is what i think it may need. umbrella plunger in the pump housing is another possible problem
Posted By: MR_P_BODY
Re: another dominator question - 04/29/09 04:03 AM
well that sounds like fuel boiling problem but the carbs that high off the engine, i dont know. could be the way fuel lines are routed. everyone is complaining about this issue lately but i had that issue a long time ago, solved the problem with a return style regulator
you will hear the fuel perculating in the bowls, there is not mistaking it. its loud enough to hear clearly but just a good old fashion carb rebuild is what i think it may need. umbrella plunger in the pump housing is another possible problem
i will change them and the gas tomorrow....thanks....i will keep everyone posted.....we rented lebanon valley friday so i am hoping to get this done before friday....cutting it close
Another problem is the fuel at this time of year,
if its been real warm there(ambient temps) you
probably still get winter fuel which can be as high
as 15 RVP and it tends to boil REAL easy in heat.
Summer fuel is closer to 8-9 RVP (RVP is Reid Vapor
Pressure) the higher the number the more pressure
it builds alone with easy boiling, the high vapor
is made to generate vapor easier for cold winter
starting/running
you will hear the fuel perculating in the bowls, there is not mistaking it. its loud enough to hear clearly but just a good old fashion carb rebuild is what i think it may need. umbrella plunger in the pump housing is another possible problem
i will change them and the gas tomorrow....thanks....i will keep everyone posted.....we rented lebanon valley friday so i am hoping to get this done before friday....cutting it close
Another problem is the fuel at this time of year,
if its been real warm there(ambient temps) you
probably still get winter fuel which can be as high
as 15 RVP and it tends to boil REAL easy in heat.
Summer fuel is closer to 8-9 RVP (RVP is Reid Vapor
Pressure) the higher the number the more pressure
it builds alone with easy boiling, the high vapor
is made to generate vapor easier for cold winter
starting/running
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/29/09 04:10 AM
Quote:i will change them and the gas tomorrow....thanks....i will keep everyone posted.....we rented lebanon valley friday so i am hoping to get this done before friday....cutting it close
well that sounds like fuel boiling problem but the carbs that high off the engine, i dont know. could be the way fuel lines are routed. everyone is complaining about this issue lately but i had that issue a long time ago, solved the problem with a return style regulator
you will hear the fuel perculating in the bowls, there is not mistaking it. its loud enough to hear clearly but just a good old fashion carb rebuild is what i think it may need. umbrella plunger in the pump housing is another possible problem
Another problem is the fuel at this time of year,
if its been real warm there(ambient temps) you
probably still get winter fuel which can be as high
as 15 RVP and it tends to boil REAL easy in heat.
Summer fuel is closer to 8-9 RVP (RVP is Reid Vapor
Pressure) the higher the number the more pressure
it builds alone with easy boiling, the high vapor
is made to generate vapor easier for cold winter
starting/running
wow thats interesting....now would the gas station attend know what RVP/winter/summer blend.they have??this is really something i never knew....thanks for that.....i am never to old to learn something
Posted By: MR_P_BODY
Re: another dominator question - 04/29/09 04:17 AM
wow thats interesting....now would the gas station attend know what RVP/winter/summer blend.they have??this is really something i never knew....thanks for that.....i am never to old to learn something
The problem is... they dont know, the company will
determine when its time(usually a calender month)
to make the change over... with us up north here it
is usually in April but if they arent moving alot
of fuel that could still be in the in ground tanks
The problem is... they dont know, the company will
determine when its time(usually a calender month)
to make the change over... with us up north here it
is usually in April but if they arent moving alot
of fuel that could still be in the in ground tanks
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/29/09 04:26 AM
Quote:
wow thats interesting....now would the gas station attend know what RVP/winter/summer blend.they have??this is really something i never knew....thanks for that.....i am never to old to learn something
The problem is... they dont know, the company will
determine when its time(usually a calender month)
to make the change over... with us up north here it
is usually in April but if they arent moving alot
of fuel that could still be in the in ground tanks
so i guess i would have to ask when they got there last delievery and maybe its a summer blend since it been in the 90s since saturday...what happened to spring??....thank you
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/29/09 12:36 PM
well let me see what happens today since its 50* today and yesterday was 90*
Posted By: Cab_Burge
Re: another dominator question - 04/29/09 03:22 PM
Quote:Well
well let me see what happens today since its 50* today and yesterday was 90*
It is odd that the rear carb front fuel bowl is the only one acting up
Posted By: GEORGE68HEMIRR
Re: another dominator question - 04/29/09 04:07 PM
Quote:Quote:Well
well let me see what happens today since its 50* today and yesterday was 90*
no both carbs were acting up that last time she dump fuel out both primary vents
now with it cooler it ran at 165/170 degrees before i added some differant fuel its running great with no problems.......must have been the winter blend and the cooler temps.....great!!!!