Dominator preference
 

Going to be switching to 4500s. Builder is partial to Quick Fuel. I notice Holley has dedicated marine 4500s and the newer Gen 3 styles. Any opinions ? What would you recommend? 540s 700hp. Figuring 1050s

AED is always my first choice.

Not familiar with them. Any particular model I should check out?

quick fuels are nice!

The Holley Marine Dominators are excellent. Best carbs I have ever tested. The 1050 should be perfect for 700 HP.

Do you know what makes it "marine"? How bout the Gen 3 models ?

AED, Holley and Quick Fuel all make a good carb that would get the job done. AED does offer some extra services with their carbs they do wet flow them for your application along with CNC porting options. They are usually bolt on adjust idle carbs. Maybe have to change main jets to get AFR's exactly where you want them. By no means nightmare carbs that have a problem flowing fuel because the emulsion jetting is all messed up like a lot of other carbs on the market. Holley and Quick fuels are pretty much the same right out of the box. All three offer Marine Carbs. I really don't see any advantage one has over the other two for your application. At this point if you builder likes Quick Fuels has an account with them and doesn't mind passing some of his savings on to the customer that's what I would go with. But the same would go for the other two carbs mentioned. I would go with the one I could get the best deal on. And me personally if I was building a 700hp motor I would not be using a Dominator to do it. Will it make a couple extra hp? Possibly. But I think a properly built 4150 would do just as well maybe even a little better and a 4150 Carb is a lot cheaper than a Dominator. Now if you really wanted to get trick you could spend the Dominator money on a custom 4150 and end up with 20-30 more horsepower for a finished product. But you have to ask yourself in the end is it really worth it?

quickfuels are about the best I've used, their adjustability is great...tech help awesome as well...

We did test with a 4150 as well. The dominator pretty decisively out performed it. The 4150 was a Pro Systems with a 1000 cfm body. If static draw is an indication of actual flow they were 900 cfm actual. I know not everyone is a fan of theirs but that's what I had. We tested a few combination of intakes and carbs. Every change gained some hp, it's tough to know where to draw the line. Engines are 548 with 305 heads. Power ranged from 674-706 depending on intake/ carb combos.

My advice, go with a quick fuel, or holley gen 3. Tune your own carb on the water using a wideband and plug readings.

Skip the concept of these guys who claim they can set you up with a carb that will be perfect out of the box in your BOAT. Go with a carb that has nice hardware and features. Theres still plenty of shops out there selling used up modified/hacked old holleys.

I can tell you who to stay away from, in my opinion, and thats

Nickerson
Lance Patten

Yeah, nothing custom. It's going back on the dyno to tune and the boat has widebands

I've had great luck with Nickerson prepped Dominators. Great idling and docking manners.

great info!

I would see if any of them offer anodizing it will keep it looking new.

Quick Fuels marine Dominator comes with that black coating that is nice.

Have you hooked up a wideband on your engines?

Yeah, I took a look at that. That might be the way to go. Didn't notice if it had power valves or not.

I wasn't really happy with the pro systems out of the box set up and some other stuff. Sort of soured me on custom stuff.

Yup, Black Dimond they call it. They offer it (optional) on many of their carbs and standard on some others.

http://image.popularhotrodding.com/f...ck-diamond.jpg

http://www.quickfueltechnology.com/i...-6631-be4b.jpg

oops. double post and I can edit this post but not above. Weird.

Not ambitious enough to scan all the graphs now and should really start another thread but because 4150s were mentioned here's some info we found fwiw.

The 4150 on a Vic Jr
674hp @ 5600 with an average 514.
645lb @ 5300 with an average 610.
The 4500 on a Vic Jr
686hp @ 5800 with an average 529
659lb @ 5300 with an average 620

Nice. More average torque with the dominator as well.

Yes outperformed it across the board and this particular 4500 was the first generation when they called them NASCAR carbs. I imagine a modern one would have done better. All the later 4500 testing was done with a modern QF

What about the intake swaps as you mentioned before ?

And 500rpm spread from pk tq to peak hp ? Or did you cut the pulls short of higher rpm ?

SB- We also tested a 454 R / 4500 with no spacer, 1in spacer and 2in spacer. We hit the hp peaks with all the combos, didn't cut any short. I'll start another thread when I can with all the info. Still not done yet. The 4150 in the above test climbed so well to 5600(the limit of that pull) that everyone thought it would keep going, but when we did another pull to a higher rpm it was all done at that original 5600 peak. I don't know what to tell you about the peak to peak spread.

Sorry for jumping the gun, Doh !

Did the 4150 go 'fat' by any chance at/after 5600 and fine before it ?

Go fat meaning? I have the sheets in front of me now, what specifically would you like to know?

Go rich fuel wise in the upper rpm is what he's asking

--

LOL.

Does this fuel curve make my carb look fat. Heh, heh. :readinghelp:

Fuel lbs/ hr
5600- 268
5700- 274
5800- 279

Bsfc
5600- .448
5700- .464
5800- .468

Afr
5600 - 11.6
5700- 11.4
5800- 11.5

Ok. Here's the fuel info on the 4150 sweep 11 and the 4500 sweep 13. On this second sweep the 4150 made 671@5600 as opposed to the first pull where it made 674.

I doubt I'd buy Pro Systems next time.

That's a pretty serious correction factor. Is the dyno shop at a very high elevation?

Doubt it. There were sensors in the room that were hooked into the computer showing atmospheric conditions. I also took pictures of the computer screen in case I needed to check what was showing and the cover sheet for the pull has the atmospheric conditions on it. I have corrected and uncorrected output on the printout. What are you seeing and what does it tell you? What figures should I be looking for ? I didn't question it since he just rebuilt the parts I gave him he didn't have much to gain by inflating numbers

holleys 80340 power valve an jet as needed cant go wrong:cool:

What does the uncorrected hp show? If his fuel flow sensors are accurate (doubtful) then your 671hp peak would only be 598hp observed. Thats over a 12% correction factor which is crazy. Unless he can calibrate his flow meters, I'd be more inclined to tune off the wideband and back it up with plug readings. I've never seen an engine combo like yours make peak power with that rich of an AFR. There's also something whacky going on if you do in fact have a 500rpm power band. Can you post a full sheet?

Which sheet do you want? The power output or...? I also have info from the other engine and combos as well. Probably won't be able to till tomorrow.

I have the power numbers here in the phone. Here's the 2 4150 pulls.

There should be one that shows uncorrected power, or shows what the correction factor was. Usually the weather station info will show the correction factor.