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Dominator tuners, what's going on here? #479702 09/25/09 09:35 PM 09/25/09 09:35 PM
Joined: Nov 2004 Posts: 1,745 Maryland 340_Dart OP top fuel
340_Dart OP top fuel Joined: Nov 2004 Posts: 1,745 Maryland	I noticed today while tuning on my 8896 dominator (on a smallblock stroker) that i can turn the idle speed screws all the way out until they no longer touch the plate attached to the butterfly shaft, and the car will still idle at 1200 rpm. However, if i put my fingers over the idle air bleeds, the car will shut off. the idle air bleeds are 55. Does this make sense? thanks-Andy

Re: Dominator tuners, what's going on here? [Re: 340_Dart] #479703 09/25/09 09:37 PM 09/25/09 09:37 PM
Joined: Jan 2003 Posts: 32,394 Q Quicktree I Win
Quicktree I Win Q Joined: Jan 2003 Posts: 32,394	I bet you have the transfer slots uncoverd. close the throttle blades some.

Re: Dominator tuners, what's going on here? [Re: Quicktree] #479704 09/25/09 09:46 PM 09/25/09 09:46 PM
Joined: Nov 2004 Posts: 1,745 Maryland 340_Dart OP top fuel
340_Dart OP top fuel Joined: Nov 2004 Posts: 1,745 Maryland	I have the throttle blades closed, well it looks like it at least. I backed the throttle blade screws all the way out and it still runs.

Re: Dominator tuners, what's going on here? [Re: 340_Dart] #479705 09/25/09 09:48 PM 09/25/09 09:48 PM
Joined: Jan 2003 Posts: 32,394 Q Quicktree I Win
Quicktree I Win Q Joined: Jan 2003 Posts: 32,394	if everything is closed and your still running you better be looking for leaks somewhere.

Re: Dominator tuners, what's going on here? [Re: Quicktree] #479706 09/25/09 10:33 PM 09/25/09 10:33 PM
A Anonymous Unregistered
Anonymous Unregistered A	check to see if the secondaries are sticking open too. some of those carbs had internal linkage probelems. has this carb been on for awhile, or new to the combo?

Re: Dominator tuners, what's going on here? [Re: Quicktree] #479707 09/25/09 10:37 PM 09/25/09 10:37 PM
Joined: Mar 2003 Posts: 2,527 PA moparacer master
moparacer master Joined: Mar 2003 Posts: 2,527 PA	The machining of the transfer slots is sometimes off. You might still have too much exposed even though the throttle plates are completely closed. 67 Barracuda street/bracket car 11.27-119 68 Dart 502 BB 8.70s-152 414 cid SB Dragster 7.65-174

Re: Dominator tuners, what's going on here? [Re: Quicktree] #479708 09/25/09 10:37 PM 09/25/09 10:37 PM
Joined: Dec 2008 Posts: 1,200 UK 6 602heavy pro stock
602heavy pro stock 6 Joined: Dec 2008 Posts: 1,200 UK	A number of these 8896s have the trans slot peeking through even when the throttle blades are shut , if this is not the case then maybe remove some spark advance , or maybe what Quicktree says (vac leak)

Re: Dominator tuners, what's going on here? [Re: 602heavy] #479709 09/25/09 10:46 PM 09/25/09 10:46 PM
Joined: Dec 2005 Posts: 11,739 Fulton County, PA C CMcAllister Mr. Helpful
CMcAllister Mr. Helpful C Joined: Dec 2005 Posts: 11,739 Fulton County, PA	If it's still running, it's getting air from somewhere. Verify that the throttle blades are actually closed. If they are, there's an air leak somewhere. I'm betting the throttle blades aren't closed, since there has to be air moving through the carb to pull fuel from the idle circuits. If the results don't match the theory, change the theory.

Post deleted by Defbob #479710 09/25/09 10:47 PM 09/25/09 10:47 PM
A Anonymous Unregistered
Anonymous Unregistered A

Re: Dominator tuners, what's going on here? #479711 09/25/09 10:55 PM 09/25/09 10:55 PM
A Anonymous Unregistered
Anonymous Unregistered A	Quote: Quote: check to see if the secondaries are sticking open too. some of those carbs had internal linkage probelems. Flashback, February 2002! absolutely!!! that brings back fond memories of you, me and Gary (unlawfl) working on your Duster. we all had a great time. i've worked on several since then too with similar problems.

Re: Dominator tuners, what's going on here? #479712 09/26/09 08:30 AM 09/26/09 08:30 AM
Joined: Aug 2005 Posts: 762 Southington Ct. T turbobitt super stock
turbobitt super stock T Joined: Aug 2005 Posts: 762 Southington Ct.	I noticed on some carbs that you have to back out all the way on the idle screws and then loosen the screws that hold the butterfly's in place to allow themselves to align in the bore and close properly. You can uasually detect this by forcing them close with a little more than spring pressure. If the idle goes down, than the throttle plate"butterfly's" are binding near the closed position. Allan G. 1970 Challenger w/572 Hemi street car and my pride and joy. 1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno. 1976 Cee Bee Avenger Jet Boat - 460 Ford powered.

Re: Dominator tuners, what's going on here? [Re: 340_Dart] #479713 09/26/09 10:49 AM 09/26/09 10:49 AM
Joined: Aug 2003 Posts: 684 Milwaukee ToddP super street
ToddP super street Joined: Aug 2003 Posts: 684 Milwaukee	What is the ignition timing at 1200 rpm? If it is locked out it may not idle below 1200 rpm. Try closing idle mixture screws, (air is supplied via idle air bleed) Or like others have stated vaccuum leak.

Re: Dominator tuners, what's going on here? #479714 09/26/09 11:18 AM 09/26/09 11:18 AM
Joined: Jan 2003 Posts: 2,155 Tucson, Arizona clonestocker top fuel
clonestocker top fuel Joined: Jan 2003 Posts: 2,155 Tucson, Arizona	Dave, You did fix it right? It's still in the box. One of these days. matt [img] [/img]

Re: Dominator tuners, what's going on here? [Re: clonestocker] #479715 09/26/09 11:44 AM 09/26/09 11:44 AM
Joined: Nov 2004 Posts: 1,745 Maryland 340_Dart OP top fuel
340_Dart OP top fuel Joined: Nov 2004 Posts: 1,745 Maryland	Thanks for the input. I'll have to check that both sets of butterflys are closing all the way. I'm willing to bet that's the problem. The car has the timing locked out at 36*, but i don't think that's the problem being that i can't make the car NOT idle. What is the purpose of the idle air bleeds? thanks-Andy

Re: Dominator tuners, what's going on here? [Re: 340_Dart] #479716 09/26/09 01:51 PM 09/26/09 01:51 PM
Joined: Oct 2005 Posts: 268 South Central Pa webemopes enthusiast
webemopes enthusiast Joined: Oct 2005 Posts: 268 South Central Pa	hey andy,had the same thing with kenny`s carbs when they came back from prc.had to tap the end of the throttle shaft where the linkage plate is welded on with a small ballpeen hammer.that was after we had them off umpteen times trying to get them to idle down

Re: Dominator tuners, what's going on here? [Re: webemopes] #479717 09/26/09 01:57 PM 09/26/09 01:57 PM
Joined: Nov 2004 Posts: 1,745 Maryland 340_Dart OP top fuel
340_Dart OP top fuel Joined: Nov 2004 Posts: 1,745 Maryland	Joe, thanks for the input. I did a little test and the carb is only getting air through the primary butterflys when they appear to be closed. So,i know i don't have a leak, but the butterflies are not closed fully. I'll have to take the carb off this weekend and see what i can do to correct this. Thanks

Re: Dominator tuners, what's going on here? [Re: 340_Dart] #479718 09/26/09 02:09 PM 09/26/09 02:09 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Joe, thanks for the input. I did a little test and the carb is only getting air through the primary butterflys when they appear to be closed. So,i know i don't have a leak, but the butterflies are not closed fully. I'll have to take the carb off this weekend and see what i can do to correct this. Thanks Loosen the screws on the plates/butterfly let them center making sure the throttle shaft closes all the way then retighten the screws on the plates... test to make sure they arent binding... then set the slot so its square(transfer slot) with the idle screw, then re install the carb then set it up for mixture and idle EDIT Also make sure the bevel in in the right place(on the plate)the number on the plate should be UP and in front for the primaries... on the top rear for the secondaries Last edited by MR_P_BODY; 09/26/09 02:19 PM.

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