trouble with dominators

General engine tech -- Drag Racing to Circle Track

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chevy art
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Re: trouble with dominators

Post by chevy art » Thu Jun 07, 2018 9:08 am

hey 2555 i will get the cqrb numbers and post them thanks art

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Re: trouble with dominators

Post by lefty o » Thu Jun 07, 2018 2:18 pm

just gonna interject here as i really see the statement "these carbs were set up for nitrous". who's selling the ball of crap? in a wet system, demand from the carb drops to just about nothing when the juice is running.

chevy art
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Re: trouble with dominators

Post by chevy art » Fri Jun 08, 2018 10:35 pm

hey lefty both my buddies have 4 pages of real impressive stats on these carbs and it cost 450 dollars for each carb to get these pedigree papers. i always went under the assumption that a good factory carb, properly chosen for a motor was about 1 jet size away from race ready. i dont know why my buddies spent all this money and now the cars wont even run without washing out the cylinders. art

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Re: trouble with dominators

Post by mag2555 » Sat Jun 09, 2018 5:39 am

With the Carb for he bigger motor I would get it back to out of the jetting and get the power valves back in it and see how it runs, it's worth the 20 minutes of work to confirm things!

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Re: trouble with dominators

Post by midnightbluS10 » Sat Jun 09, 2018 6:04 am

chevy art wrote:
Tue Jun 05, 2018 8:30 pm
one friend has a 502 bb ford with aluminum heads and makes power to aprox 65oo and other friend has a 383 sbc with big alum heads abd big solid roller and can probably go to 7500-8000 rpms. both had the 1050s sent out to some guru and the carbs camd back as follows m 502 carb is 92 square now with no power valve and the 383 carb if 90 square with no power valves. i believe factore specs are 88 jets front and rear and 4,5 PV in front and rear. both of these carbs turn the plugs in both engines black and sooty and gas just flows driving around and even over 4000 rpms. both engines are plumbed for niitrous the 383 has individual nitrous line to each cylinder runner on intake and a plate is on the 502 ford. dont know what else the carb guy did to these carbs. as far as i am concerned each carb should have been within 1 jet size to run great right out of the box without the juice. any ideas what could be going wrong with these carbs other than the fact that they are probably too big for each engine. thanks for help art
What exactly do you mean by "right out of the box"? Most people use that when speaking about new, untouched, unmodified parts. If that's the case, how would the same carb be close on two totally different combos?
J.C.

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Re: trouble with dominators

Post by jmarkaudio » Mon Jun 11, 2018 6:27 pm

See if you can get all metering specs on the carbs. Jet size can be significantly different whether it 2 or 3 circuit, and on 3 depends on how much intermediate fuel is being used. While it supply primarily at part throttle being a divorced circuit it feeds some at WOT. A single 2 circuit 1050 will be around 92-93 with no power valves on non oxygenated gas, 2 carbs usually less. But it also sounds like the rest of the calibration is off for idle and transition metering, driving around on the street is where they spend most of the time.
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Good work isn't cheap and cheap work can't be good.

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