Re: Dominator on the street, power valve or not
[Re: galen]
#570316
01/02/10 09:53 PM
01/02/10 09:53 PM
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Joined: Nov 2003
Posts: 2,715 closer to Canadian beer!
torkrules
I'm neurotic
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I'm neurotic
Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
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Quote:
I am running 8896-2 on the street. 500' 440-3 intake. Idle and midrange runs eye burning rich. I am running a progressive linkage and front butterflies open 1/3 before the rears start to open. Carb originally came with 1 to 1 soft progressive.I am running a 4.5 power valve in the front. plug in the back. Found my number 1 & 2 spark plugs black, back six are brown. Idle screws all 4 are set for highest vac. Could using a power valve be causing this? I have an air bleed assortment but have not changed anything yet. Wide open jetting is close. Its idle to about 3500 thats rich. Timing is at 36, have tried it all over the place, it seems to like 36. I am running an aftermarket 10degree bushing in msd with light springs. Idle timing is 26. Galen
Ran the same carb on my old 496. I found that the transfer slots were feeding too much fuel. That's a 3 circuit carb so as soon as you get into cruising rpm the transition tubes start to feed fuel making it too rich. I drilled the transfer holes bigger in the main body and hammered in a brass air bleed and opened up the hole to about .082".
I ran a power valve. Since the carb has no vacuum port you will need to rig something up to read your idle/cruise vacuum and set up the power valve accordingly. I blocked the rear power valve off and jetted up accordingly.
Start with air bleeds up to stock to start. You may want to lean the idle and transition circuit slightly leaner.
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Re: Dominator on the street, power valve or not
[Re: MR_P_BODY]
#570319
01/02/10 10:06 PM
01/02/10 10:06 PM
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Joined: May 2009
Posts: 860 Missouri
galen
OP
super stock
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OP
super stock
Joined: May 2009
Posts: 860
Missouri
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Re: Dominator on the street, power valve or not
[Re: galen]
#570320
01/02/10 10:07 PM
01/02/10 10:07 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
primary is 88 Mike
Thats pretty fat for having a PV
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Re: Dominator on the street, power valve or not
[Re: galen]
#570322
01/02/10 10:18 PM
01/02/10 10:18 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Mike it came with 6.5s front and rear with 88 jets squared. Do the main jets effect the idle off idle mixture?
My 8896 came with 88s squared and no PV... off idle it starts on the mid
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Re: Dominator on the street, power valve or not
[Re: Ari440]
#570326
01/03/10 10:24 AM
01/03/10 10:24 AM
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Joined: Nov 2003
Posts: 2,715 closer to Canadian beer!
torkrules
I'm neurotic
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I'm neurotic
Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
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Quote:
my 8896 92-94 jets no p/v
I had mine down to 83 with the PV in the front and 88 or 90 in the rear with no PV. Mine came with 88 square and a powervalve. I thought that was too rich.
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Re: Dominator on the street, power valve or not
[Re: torkrules]
#570327
01/03/10 11:13 AM
01/03/10 11:13 AM
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Joined: Jan 2003
Posts: 17,928 Akron, Ohio
ProSport
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,928
Akron, Ohio
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I have a single 9375 1050 Dominator, jets are 96 squared with no power valve, but if I'm just cruising for a couple weeks without racing I throw a power valve in the front and jet the front down 8 numbers, makes it run MUCH smoother through 1st gear at slow speeds on the street.
1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual
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Re: Dominator on the street, power valve or not
[Re: torkrules]
#570328
01/03/10 11:27 AM
01/03/10 11:27 AM
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Joined: Oct 2007
Posts: 4,219 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,219
New York
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1 irritating problem with 3 circuit carbs is that the point of tip-in for the intermediate is the position of the hole in the body vs. the sweep of the throttle disc (not RPM or vacuum). This means that different engines size, static CR, cams, plenum volumes etc. need not only a difference hole size, but the hole "bumped" a bit forward or back to change the throttle disc angle at which the hole is exposed to vacuum. IMHO some have already done this, but are not telling.
If you examine a "suspect" carb, look for a partial bevel or flat spot on the disc's edge where it passes the holes...
Boffin Emeritus
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Re: Dominator on the street, power valve or not
[Re: Leigh]
#570329
01/03/10 11:52 AM
01/03/10 11:52 AM
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Joined: Nov 2003
Posts: 2,715 closer to Canadian beer!
torkrules
I'm neurotic
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I'm neurotic
Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
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Quote:
OEM jetting. Your's is oem jetting at 88 primary and secondary with P/Valves. Where does the -2 suffix come from? There isn't a part # on Holley or Summit site?
Ran into the same problem with mine. No one could tell me what the -2 meant. It was stamped "HP" on the side.
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