Re: Dominator tunning
[Re: 602heavy]
#464408
09/10/09 08:15 PM
09/10/09 08:15 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
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Don't knownhow any of you guys run the 8896 (3 circuit) without modifications , got four of these & every one of em runs pig rich on a 605" , i've since modified them to a 2 circuit , can't see the point in restricting the intermediate circuit to clean it up considering the main well is restricted anyhow , who gets good results from the 3 circuit dommies , OK they may run but they ARE pig rich.
Not starting a debate as this has been covered untold times , just asking who is happy with them.
I havent had any problem with my 8896.... been on my 405ci for 4 years(1 was converted to E-85) the other 8896 is setting in my trailer... it ran fine but I dont do alot of cruising... its mainly idle or WOT with some cruising in the pits
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Re: Dominator tunning
[Re: 602heavy]
#464409
09/10/09 08:16 PM
09/10/09 08:16 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
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Don't knownhow any of you guys run the 8896 (3 circuit) without modifications , got four of these & every one of em runs pig rich on a 605" , i've since modified them to a 2 circuit , can't see the point in restricting the intermediate circuit to clean it up considering the main well is restricted anyhow , who gets good results from the 3 circuit dommies , OK they may run but they ARE pig rich.
Not starting a debate as this has been covered untold times , just asking who is happy with them.
how much of a role does the intermediate circuit play on a race carb where it's either at idle or WOT?
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Re: Dominator tunning
[Re: Bigcube]
#464411
09/10/09 08:20 PM
09/10/09 08:20 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
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Don't knownhow any of you guys run the 8896 (3 circuit) without modifications , got four of these & every one of em runs pig rich on a 605" , i've since modified them to a 2 circuit , can't see the point in restricting the intermediate circuit to clean it up considering the main well is restricted anyhow , who gets good results from the 3 circuit dommies , OK they may run but they ARE pig rich.
Not starting a debate as this has been covered untold times , just asking who is happy with them.
Is it rich at full throttle or just part throttle? Mine was very rich for part throttle and needed a PV in the front and work on the metering blocks as well as lot's of air bleed tweaks to clean up. I wouldn't have known what to do but Dwayne (fast68plymouth) did
what did you do other than adding a PV? and what did your jetting end up being?
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Re: Dominator tunning
[Re: Quicktree]
#464412
09/10/09 08:42 PM
09/10/09 08:42 PM
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Joined: Nov 2003
Posts: 10,384 Upstate NY
Bigcube
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Don't knownhow any of you guys run the 8896 (3 circuit) without modifications , got four of these & every one of em runs pig rich on a 605" , i've since modified them to a 2 circuit , can't see the point in restricting the intermediate circuit to clean it up considering the main well is restricted anyhow , who gets good results from the 3 circuit dommies , OK they may run but they ARE pig rich.
Not starting a debate as this has been covered untold times , just asking who is happy with them.
Is it rich at full throttle or just part throttle? Mine was very rich for part throttle and needed a PV in the front and work on the metering blocks as well as lot's of air bleed tweaks to clean up. I wouldn't have known what to do but Dwayne (fast68plymouth) did
what did you do other than adding a PV? and what did your jetting end up being?
I didn't make the Mod's, Dwayne did. Inside the metering block there is some air bleeds that were added. I think it was to restrict fuel flow for the intermediate circuit. Jetting ended up staggered. I recall I was 92 sq with no PV and somewhere around 87 and 98 after the PV was added but don't quote me on that. It also took lot's of dinking around on the dyno messing with air bleeds to get the part throttle A/F ratio correct at part throttle. Don't even ask where we ended up, I recall I didn't have what it needed so some were drilled out to make what it needed. Dwayne is the Da Man!
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Re: Dominator tunning
[Re: Bigcube]
#464413
09/10/09 09:32 PM
09/10/09 09:32 PM
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Joined: Dec 2008
Posts: 1,200 UK
602heavy
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I won't bore you with the mods i carried out to clean it up but it now runs crisp & clean throughout the rpm range , if you jet the intermediate circuit down then the main circuit won't flow enough fuel , kind of defeats the object don't you think? , as has already been said numerous times , these 3 circuits are maxed out over a 94/96 jet (main well restricted) , i'm talking real world here as i've tried a few of these 3 circuit dommies , they load up @ idle/transition , what's the point of trying to clean the plugs on the start line? , are you using a 3 circuit Quicktree? , if so i don't think a pump cam swap will get you sorted.
Last edited by 602heavy; 09/10/09 09:34 PM.
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Re: Dominator tunning
[Re: 602heavy]
#464414
09/10/09 09:39 PM
09/10/09 09:39 PM
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I won't bore you with the mods i carried out to clean it up but it now runs crisp & clean throughout the rpm range , if you jet the intermediate circuit down then the main circuit won't flow enough fuel , kind of defeats the object don't you think? , as has already been said numerous times , these 3 circuits are maxed out over a 94/96 jet (main well restricted) , i'm talking real world here as i've tried a few of these 3 circuit dommies , they load up @ idle/transition , what's the point of trying to clean the plugs on the start line? , are you using a 3 circuit Quicktree? , if so i don't think a pump cam swap will get you sorted.
yes it's a 8896-2
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Re: Dominator tunning
[Re: Quicktree]
#464415
09/10/09 09:59 PM
09/10/09 09:59 PM
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Joined: Dec 2008
Posts: 1,200 UK
602heavy
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yes it's a 8896-2
If i remember correctly these 8896-2s come out the box with 6.5 PVs back & front with 88 squared jetting , i removed the sec PV with MJs @ #92P/100Sec , i also fitted 2 circuit blocks with modifications to the main well, booster pins , cross over channel...........................
I would bet any 3 circuit out the box will run rich on 99% of motors.
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Re: Dominator tunning
[Re: 602heavy]
#464416
09/10/09 10:08 PM
09/10/09 10:08 PM
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Quicktree
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yes it's a 8896-2
If i remember correctly these 8896-2s come out the box with 6.5 PVs back & front with 88 squared jetting , i removed the sec PV with MJs @ #92P/100Sec , i also fitted 2 circuit blocks with modifications to the main well, booster pins , cross over channel...........................
I would bet any 3 circuit out the box will run rich on 99% of motors.
this one had a PV in the front. I removed it and square jetted to 93s. I may have to go back and put the PV back. I want to try the white cam first just to see what happens. I reduced the maine to 91 square. looks like it will take a little work to dial it in.
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Re: Dominator tunning
[Re: 602heavy]
#464420
09/10/09 10:23 PM
09/10/09 10:23 PM
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Good luck
Just for fun (5 minutes work) , change out the 3 circuit metering block gaskets for 2 circuit & swap the intermediate/IAB bleeds over , bet it runs like a top.
swap them to what? what will changing the gaskets do?
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Re: Dominator tunning
[Re: 602heavy]
#464422
09/10/09 10:40 PM
09/10/09 10:40 PM
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Joined: Nov 2003
Posts: 10,384 Upstate NY
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I would bet any 3 circuit out the box will run rich on 99% of motors.
Unless you make mods to the metering block it be rich at part throttle. You can get idle circuit and WOT working with jetting and air bleeds, part throttle is another story. Squared and no PV will never work for part throttle. Mine is an 1150 3 circuit.
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Re: Dominator tunning
[Re: 602heavy]
#464424
09/10/09 10:49 PM
09/10/09 10:49 PM
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Remove the metering block to main body gaskets & go fit a set of gaskets off a two circuit carb , (4150 gasket will do) , what this does is block off the intermediate circuit , reason being the two circuit has the hole already blocked off , no other mods are needed appart from removing the idle air bleed to the intermediate blkeed location , you have got the screw in bleeds?
It will just save you a bunch of time messing with the pump cams , most it will take is ten minutes , you can always put it back to baseline setting afterwoods.
yes it has screw in bleeds. I 'll try it. so you say to swap the idle and intermediate bleeds?
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Re: Dominator tunning
[Re: B1HEAD_USER]
#464425
09/10/09 10:53 PM
09/10/09 10:53 PM
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Joined: Dec 2008
Posts: 1,200 UK
602heavy
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Quote:
Dominator conversion
Interesting article , but to save Quicktree all the drilling & jetting with that modification he can just change the gaskets for now & that will show the problem lies in the intermediate circuit , tis quick & easy with no drilling , when he's happy he's nailed the overly rich situation he can then cut & drill the carb.
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Re: Dominator tunning
[Re: Quicktree]
#464426
09/10/09 11:00 PM
09/10/09 11:00 PM
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Joined: Dec 2008
Posts: 1,200 UK
602heavy
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yes it has screw in bleeds. I 'll try it. so you say to swap the idle and intermediate bleeds?
Just remove the 4 outboard bleeds & move them to the middle , in effect you will be removing the middle bleeds & replacing them with the outer bleeds , nothing will have been done to the carb that can't be put back to baseline settings again.
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Re: Dominator tunning
[Re: 602heavy]
#464427
09/10/09 11:04 PM
09/10/09 11:04 PM
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yes it has screw in bleeds. I 'll try it. so you say to swap the idle and intermediate bleeds?
Just remove the 4 outboard bleeds & move them to the middle , in effect you will be removing the middle bleeds & replacing them with the outer bleeds , nothing will have been done to the carb that can't be put back to baseline settings again.
I'll sure try it, nothing to lose.
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