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Re: Carb Tuneing
[Re: Moparnut426]
#1092737
10/11/11 05:15 PM
10/11/11 05:15 PM
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Joined: Jun 2003
Posts: 9,225
Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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set the transfer slots for both pri and secondary then start the engine. to adjust idle rpm, use your timing and not the screw on the side to raise and lower your idle rpm. adjust AF screws. readjust timing. recurve dist. done
if you have a msd dist, i dont think you can recurve easy like a mopar one because they suck
Last edited by sixpackgut; 10/11/11 05:18 PM.
Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: Carb Tuneing
[Re: sixpackgut]
#1092738
10/11/11 06:28 PM
10/11/11 06:28 PM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
set the transfer slots for both pri and secondary then start the engine. to adjust idle rpm, use your timing and not the screw on the side to raise and lower your idle rpm. adjust AF screws. readjust timing. recurve dist. done
if you have a msd dist, i dont think you can recurve easy like a mopar one because they suck
MSD dist. suck  , Don't know which one you say is hard to dial in  . I loved mine on my SB, i'll NEVER use a MP dizzy again, there a big PITA IMO with sloppy shafts too boot.
This is the one i use & its simple/simple/simple, just need an aftermarket box, but who cares everyone gets them anyways, The MP boxes suck, at least the orange units.
http://www.jegs.com/i/MSD+Ignition/121/8534/10002/-1
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Re: Carb Tuneing
[Re: Moparnut426]
#1092739
10/11/11 06:38 PM
10/11/11 06:38 PM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
So how do I adjust it out of that if its past the idle cuircut
Kasey
Square up the transfer slots on the primaries, even if its 4 corner idle the rear ones sit higher on the base, so you may never exspose them unless you open the butterflies more then the primaries, so start off with squareing up the front slots, then find out how far you needed to turn on the throttle screw to reach it, then open up the secondaries as much as the front, so if your primary throttle screw is 1.1/2 turns from fully seated, then set the back at 1.1/2 turns, then set all mix screws at 1.1/4 open, fire it up, make sure float level is good, set timing for highest manifold vacuum, then tailer in the mix screws & throttle shafts to obtain the best idle & the RPM where you want it. Hope this makes sence.
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Re: Carb Tuneing
[Re: Moparnut426]
#1092742
10/11/11 11:09 PM
10/11/11 11:09 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:
Well I did all that and the idle screws are only about 1/4 to 1/2 out, and it dosnt die with them screwed inn. Do i need different idle air bleeds?
Kasey
Did you have the transfer slots squared before you
tried to turn in the mixture screws... if they were
open to much you werent on the idle circuit
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Re: Carb Tuneing
[Re: MR_P_BODY]
#1092743
10/11/11 11:12 PM
10/11/11 11:12 PM
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Joined: Mar 2007
Posts: 12,013
Finally a HUSKER again
Moparnut426
OP
I Live Here
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OP
I Live Here
Joined: Mar 2007
Posts: 12,013
Finally a HUSKER again
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Quote:
Quote:
Well I did all that and the idle screws are only about 1/4 to 1/2 out, and it dosnt die with them screwed inn. Do i need different idle air bleeds?
Kasey
Did you have the transfer slots squared before you
tried to turn in the mixture screws... if they were
open to much you werent on the idle circuit
yes, I turned the carb over, squared up the slots, was pretty close to closed, wasnt opened very far at all, and I tuned it from there. still didnt die out after screwing them inn.
Kasey
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Re: Carb Tuneing
[Re: Moparnut426]
#1092745
10/11/11 11:53 PM
10/11/11 11:53 PM
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Joined: Jun 2003
Posts: 9,225
Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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Quote:
Quote:
Quote:
Well I did all that and the idle screws are only about 1/4 to 1/2 out, and it dosnt die with them screwed inn. Do i need different idle air bleeds?
Kasey
Did you have the transfer slots squared before you
tried to turn in the mixture screws... if they were
open to much you werent on the idle circuit
yes, I turned the carb over, squared up the slots, was pretty close to closed, wasnt opened very far at all, and I tuned it from there. still didnt die out after screwing them inn.
Kasey
fuel is getting in the motor from somewhere. if it was me, i would take the carb off, completely drain it and blow air into the little hole under the throttle blades and see if you feel air comming out the airbleeds with the mixture screw all the way in or its getting alot of fuel out of the transfer slot.
check to make sure you dont have a blown PV also
Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: Carb Tuneing
[Re: Moparnut426]
#1092746
10/12/11 12:01 AM
10/12/11 12:01 AM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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I had similar issues with my 750 mighty demon with "idle-Eze". 1. Try dropping the float levels a little more. 2. Make sure the idle air bleeds ( outers ) are the correct size. Mine were supposed to be .070" per the spec. Actually mic'ed .067". When I corrected that, I could kill the motor ( barely ) when I turned the mixture screws all the way in. Idled best with the mixture screws 1/2 turn out. BTW, you only want to "square" the transfer slots on the primary side. Secondary butterflies should be set to the bottom of the transfer slots ( not visible from the underside at idle. If you have "idle-eze", base line it at 1 1/2 turns out.
Fastest 300
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Re: Carb Tuneing
[Re: sixpackgut]
#1092747
10/12/11 12:01 AM
10/12/11 12:01 AM
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Joined: Mar 2007
Posts: 12,013
Finally a HUSKER again
Moparnut426
OP
I Live Here
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OP
I Live Here
Joined: Mar 2007
Posts: 12,013
Finally a HUSKER again
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Quote:
Quote:
Quote:
Quote:
Well I did all that and the idle screws are only about 1/4 to 1/2 out, and it dosnt die with them screwed inn. Do i need different idle air bleeds?
Kasey
Did you have the transfer slots squared before you
tried to turn in the mixture screws... if they were
open to much you werent on the idle circuit
yes, I turned the carb over, squared up the slots, was pretty close to closed, wasnt opened very far at all, and I tuned it from there. still didnt die out after screwing them inn.
Kasey
fuel is getting in the motor from somewhere. if it was me, i would take the carb off, completely drain it and blow air into the little hole under the throttle blades and see if you feel air comming out the airbleeds with the mixture screw all the way in or its getting alot of fuel out of the transfer slot.
check to make sure you dont have a blown PV also
Ill do that again. I have a new PV inn it. Ill check to make sure they are clear.
Kasey
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Re: Carb Tuneing
[Re: Crizila]
#1092748
10/12/11 12:04 AM
10/12/11 12:04 AM
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Joined: Mar 2007
Posts: 12,013
Finally a HUSKER again
Moparnut426
OP
I Live Here
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OP
I Live Here
Joined: Mar 2007
Posts: 12,013
Finally a HUSKER again
|
Quote:
I had similar issues with my 750 mighty demon with "idle-Eze". 1. Try dropping the float levels a little more. 2. Make sure the idle air bleeds ( outers ) are the correct size. Mine were supposed to be .070" per the spec. Actually mic'ed .067". When I corrected that, I could kill the motor ( barely ) when I turned the mixture screws all the way in. Idled best with the mixture screws 1/2 turn out. BTW, you only want to "square" the transfer slots on the primary side. Secondary butterflies should be set to the bottom of the transfer slots ( not visible from the underside at idle. If you have "idle-eze", base line it at 1 1/2 turns out.
Ive done this, and also have 70s on the idle air bleeds.
The screws are about 1/2 out now but wont kill it off. Heres a thought just popped inn my head. Is it suposed to die individually, or when all of them are screwed all the way inn.
Kasey
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Re: Carb Tuneing
[Re: Moparnut426]
#1092749
10/12/11 01:09 AM
10/12/11 01:09 AM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
master
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master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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Hey Casey
Does it have a idle speed screw on the back throttle shaft, most 4150's dont but some HP series do. Some you can adjust with the carb off on the bottom side of the base with a small set screw. You can turn it in a 1/2 turn or so. This will help give the engine some extra air without being so much in the front transfer slots. Thats why you see lots of old holley out there at the swap meets that have holes drilled in the butter flies. If you dont care to do this, this still might be a option, you can get replacement butter flies cheap if you want to go back so..
Make sure the floats are close, back the idle speed screw all the way out, then turn the idle mixture screws out about 1 1/2 to 1 3/4 turns from a light seat. This is probably hair fat but should provide a base line to adjust from. Turn the idle speed screw in to it just touches the cam, then turn in 1/2 turn see if it will idle, if it wont turn it in another 1/4 turn and try again.
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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