Marine Dominators
 

The largest Marine Dominator I am aware of is a 1050. I need a 1250. Is there an out of the box 1250 out there?

Does Nickerson address the throttle shaft sealing when they do a carb?

Anyone comfortable telling me what Nickerson charges to convert a Dominator to Marine use? How long do they need it?

Re: Marine Dominators
 

I do my own Dominators and have them up to 1400 cfm with custom metering conversions and machined for screw in air bleeds in two and three circuit for marine use I don't know of anyone that has them out of the box their going to have to be custom you really need to contact the person you're going to buy them from to make certain you're going to get the right thing you need these are pricey pieces you don't want to be back and forward with one . I will not do one unless I tune the engine myself on the dyno. Good Luck Laz Mesa

Re: Marine Dominators
 

Nickerson can do anything you want but like MESABALANCING said it's pricey. Dean re-worked my Deamon and it's dead on never had a carb like it before. I just called him gave him all the specs he wanted about my engine and he went to work from there. I'm sending it back this winter and have them tune it up so it will be on the money next summer. We only get a few weeks of boating and I don't want to be chasing the carb around like they are on another thread.

Re: Marine Dominators
 

I agree with Laz!! the best way is to put them on a dyno and tune them, best money you can spend!! my 1271s were tuned on the dyno were able to tweek out 32ft lbs torque in the 4000 rpm range ( which is most of my running) best investment I made.

Re: Marine Dominators
 

unless randy at cobra power dyno's you stuff then you'll be chasing carb problems like i am on the other thread. worst money and time i ever spent taking my motors to him you could tell that they didn't give 2 chits about my motors!

Re: Marine Dominators
 

Quit sugar coating it and tell us how you REALLY feel! :D Smitty

Re: Marine Dominators
 

that was a real bad experience, can't say that I blame you for not wanting to try it again.

Re: Marine Dominators
 

The dominators I have now are tuned on a dyno. I don't need more power actually but I don't want to loose any either. With just under 9 to 1 compression my big Fords make 872 horse at 6500 with 1 1250 dominator.

But here is the catch, It is not a "marine dominator" and I would like the sealed shafts and j-tubes. Any other improvements would be the icing on the cake.

BTW we adjusted the jet and air bleeds for power and by reading the plugs. As you can see, my air fuel ratio is too high and The BSFC is a lttle too efficient and I don't want to burn anything down.

I am not a Carb expert but can definitely do another dyno session.

Re: Marine Dominators
 

I had Nickerson build me a dominator for my 540 n.a. I gave him all the specs he wanted. He sent me an 1180 Marine HP Dominator. Other than setting the idle, I never had to touch a thing. The dyno said the fuel curve was perfect. When running the boat, the plugs come out perfect. He even hit the power valve right on the nose. This motor idles like an EFI , never bogs. I was and still am impressed. Thanks to Dean and Brad.. :D

Re: Marine Dominators
 

Any experts have any input on the air fuel ratio or BFSC? My plugs had a nice tan patina on the porcelain. No white crust and definitely no fouling.

Laz I appreciated your advice on the reversion, You were nuts on. It is too bad I live 3300 miles away from you. Thanks again.

Re: Marine Dominators
 

I'm glad the info helped sometimes one gets tunnel vission in one direction and the simple things get you. As far as the BSFC you should be in the mid 40's to low 50's and the ratio should be in the 12.1 in the torque range and 13.1 in the top if you can get it. By the way have you delt with Drew in WA he's supposed to be real good I met him at the boat show in Feb and he seemed knowledgeable maybe he can help. Good luck nice to hear from you Laz Mesa

Re: Marine Dominators
 

Thanks Laz;

Yes I know Drew very well. He is the original builder of these motors. He too suggested higher BFSC #s but thought the velocity stack on the dyno may be part of the problem.

I forgot to run the motors with the flame arrestors on, I was too wound up with other issues as they were on the dyno. As we up sized the main jets, after 98s, we started to fall off in power, That is why I think I need an expertly tuned carb, Preferably marinized.

Re: Marine Dominators
 

Just had an interesting conversation with Nickerson Carbs. From that discussion;

1) There is no such thing as a "sealed throttle shaft". It simply does not exist. If you have one, let the alcohol guys know about it, they would love to solve that dilemma.

2) The j tube is a Holley invention for marine carbs. The USCG has absolutely no requirement for these. They are more concerned about flame arrestors and SS braided lines.

For what it is worth.