Am I choking my 588ci? Need Doms?

[PatriYacht]

Here is some info on 2 versus 3 circuit Dominators. http://speedtalk.com/forum/viewtopic.php?t=9934

[KAAMA]

Here is some info on 2 versus 3 circuit Dominators. http://speedtalk.com/forum/viewtopic.php?t=9934

Thanks Ian!!!

[KAAMA]

Okay, my friend removed the spark arrestor off the carbs. As you look down on the carbs there are a total of 12 air jet style screw-in bleeds. Also, on the sides of these Dominators it says: "List 8896 2" and then it says "Model 4500"

[Trim'd Up]

8896's are 3 circuit. I have one myself.

[Nordicflame]

I just thought I'd give a preliminary update with a first water test.
Spring is trying to let go and give way to nicer weather and I had an opportunity to go out and run in some nice 58* weather.

Anyway, I made some changes other than the Dom/Victor setups such as a switch to 380 K-Plates from 280s, prop tweak from BBlades and some nose cones but the results are actually pretty startling, real, and point directly to the induction in my view.

No dyno results but real live boat testing should do the trick.
Last year I could 87-89 at will in any temp and on occasion touch 90 pulling 5300-5400 rpm.
Keep in mind that all results are from 4400-5000 feet elevation

I installed the ProSystems 1100 Doms on top of the port matched and blended TD Victors. Motors fired right off on the hose and idled perfect.
Went to the lake, backed it in to the water and was ready to mess with the in/out of gear situation. Put it in forward on the trailer and it dropped from 900 to 750 with no issue at all.

After confirming timing "again" and preliminary runs to 4500 rpm with the A/F meter in hand we determined we were very safe (rich) and proceded to mess with the new tabs a bit to see what it liked. It liked more tab when over 80 so I gave it a good hard run. First hard pull stabled by the tabs netted a 5800rpm pull and just a touch over 95mph So much for the tabs scubbing speed

The carbs are pretty good all over but pretty gurglly and sputtery between off idle and about 3000 rpm when they clear out (A/F was in the high 10s here). It was also pretty rich up on top at about 10.8-11.0:1 so more power is still hanging around in there
The great customer service with ProSystems is calculating my air bleed and jetting changes. Hard to hit a high altitude setup out of the box I suppose.

As far as idling and docking with the Doms, I was able to change my Crane box from my 24/34 curve back to the easier starting 14/34 curve with no issue at all so far.

Guess the outcome for me is that these big inch motors need much more than what the standard carb calculator says
Let'em breath!

Can't wait to come down to your low elevations

Dave

[DAREDEVIL]

I just thought I'd give a preliminary update with a first water test.
Spring is trying to let go and give way to nicer weather and I had an opportunity to go out and run in some nice 58* weather.

Anyway, I made some changes other than the Dom/Victor setups such as a switch to 380 K-Plates from 280s, prop tweak from BBlades and some nose cones but the results are actually pretty startling, real, and point directly to the induction in my view.

No dyno results but real live boat testing should do the trick.
Last year I could 87-89 at will in any temp and on occasion touch 90 pulling 5300-5400 rpm.
Keep in mind that all results are from 4400-5000 feet elevation

I installed the ProSystems 1100 Doms on top of the port matched and blended TD Victors. Motors fired right off on the hose and idled perfect.
Went to the lake, backed it in to the water and was ready to mess with the in/out of gear situation. Put it in forward on the trailer and it dropped from 900 to 750 with no issue at all.

After confirming timing "again" and preliminary runs to 4500 rpm with the A/F meter in hand we determined we were very safe (rich) and proceded to mess with the new tabs a bit to see what it liked. It liked more tab when over 80 so I gave it a good hard run. First hard pull stabled by the tabs netted a 5800rpm pull and just a touch over 95mph So much for the tabs scubbing speed

The carbs are pretty good all over but pretty gurglly and sputtery between off idle and about 3000 rpm when they clear out (A/F was in the high 10s here). It was also pretty rich up on top at about 10.8-11.0:1 so more power is still hanging around in there
The great customer service with ProSystems is calculating my air bleed and jetting changes. Hard to hit a high altitude setup out of the box I suppose.

As far as idling and docking with the Doms, I was able to change my Crane box from my 24/34 curve back to the easier starting 14/34 curve with no issue at all so far.

Guess the outcome for me is that these big inch motors need much more than what the standard carb calculator says
Let'em breath!

Can't wait to come down to your low elevations

Dave

Congrats...

[northernoffshore]

I have 2 new 1050 cfm carbs with flame arresstors and cable holders. jay

[WETTE VETTE]

Thought for next year. Have Bob set you up with a couple of Darrin Morgan ported TR's and go to 2-Domis and watch the speedo go past the century mark!! You're right these big motors need to breathe. Congrats on the results!

[Nordicflame]

Thought for next year. Have Bob set you up with a couple of Darrin Morgan ported TR's and go to 2-Domis and watch the speedo go past the century mark!! You're right these big motors need to breathe. Congrats on the results!

That would be tempting Craig but the hatch was already an obstacle with the Doms and new flame arrestors I built. My wife, as patient as she is would probably trump that thought

I'm very satisfied at this point!

Thanks for the !
Dave

[Pismo10]

Great thread.

[jeffswav]

Congrats on your project!! Bob RMbuilder is definatly the cam Guru. Wideband O2 it the only way to tune. Sounds like you are a little rich and should be able to get a few more HP. Problem is if you change elevations you will have to retune. I have the Holley MPI kit with wideband O2, the PCM will adjust the fuel for the conditions.

[AIR TIME]

Congrats on your project!! Bob RMbuilder is definatly the cam Guru. Wideband O2 it the only way to tune. Sounds like you are a little rich and should be able to get a few more HP. Problem is if you change elevations you will have to retune. I have the Holley MPI kit with wideband O2, the PCM will adjust the fuel for the conditions.

sounds good, I had a DN 1050 for my 509 woke it right up from the 850 bg but it wouldn't idle the few test runs and after it was stolen DEAN G set me up with a CFM carb but have not used it yet. so who does a great intake ? wilson .I want bob to pick a better cam and with a ported intake and some head work done to my merlins was hoping for 700hp out of my 509 its at 650 plus with the DN carb stock 1050 was 650hp. but this will be later this summer after I get my blown 572 from DEAN in the next two weeks I hope.

[PatriYacht]

Edelbrock makes a cnc ported Victor and Super Victor for a reasonable price. If you want to spend the big bucks, Wilson could do a good job. Delivery this time of the year might take a while. Rmbuilder was talking about writing a cnc program of his own for Edelbrock manifolds. I wonder if he ever got that finished?

[DAREDEVIL]

These Intakes are ment to make power and have a nice flow !!!!!

http://www.profilerperformance.com/b...ntake-206.html

[Nordicflame]

These Intakes are ment to make power and have a nice flow !!!!!

http://www.profilerperformance.com/b...ntake-206.html

Too tall for my application and they do not accept standard length distributors.
I too was intrigued with the Jr.
Dave

[PatriYacht]

The unported Super Vic would be just as good at the rpm's these engines turn at 1/3 the cost. If you're going to turn 8000 rpm and run nitrous, the Profiler might make more hp.

[DAREDEVIL]

Too tall for my application and they do not accept standard length distributors.
I too was intrigued with the Jr.
Dave

What do u mean by they don't accept standard distributors..is there any thing else out there....u stick a slip collar on it and tats how all of the tall deck ones work, if the intake is not machined !!!!

[AIR TIME]

What do u mean by they don't accept standard distributors..is there any thing else out there....u stick a slip collar on it and tats how all of the tall deck ones work, if the intake is not machined !!!!

thats what they ment, the jr is for 9.8 502 to 540 short deck reg distributors and tall decks need collars. I am calling them to see if the jr will get me power over my dart from 5000 to 6400rpm for the 509. DD was hoping to see yah at the races this yr but still waiting for my motor.

[DAREDEVIL]

thats what they ment, the jr is for 9.8 502 to 540 short deck reg distributors and tall decks need collars. I am calling them to see if the jr will get me power over my dart from 5000 to 6400rpm for the 509. DD was hoping to see yah at the races this yr but still waiting for my motor.

Well see each other soon buddy !!!!!
They also make it for a short deck...but i know some manufacturs actually mashine the distributor hole down so the standard will fit..!

[Nordicflame]

I use standard length Thunderbolt distributors (attached to a Crane HI-6M) because they seem to be bulletproof compared to the others out there.
That's what standard means
Most all of the newer intakes are machined to accept standard distributors; the Snipers are not.

Hopefully someone picks up the Crane HI-6M product line so this can be continued.