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6 pack fine tuning/jetting recommendations
#438089
08/14/09 10:12 PM
08/14/09 10:12 PM
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Joined: Jan 2003
Posts: 614
Id
mopeman
OP
mopar
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OP
mopar
Joined: Jan 2003
Posts: 614
Id
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OK, so I got the carbs running good, used a tach and vac guage to tune the carbs, did the front to rear carb swap too. Replaced the secondary spings and worked all the way down to the white springs and still have a bog/hesitation when the outboards kick in. I will be getting the Promax jet blocks in a couple of months when I can afford them. So in the mean time, I will try to drill out the factory metering blocks. I don't care about the blocks because I will be replacing them, but I don't want mess them up and not be able to enjoy the car untill I get the Promax plates. So I will be sneaking up on what I need. Does anybody have any ideas or recommendations for this. I know even though the car runs great, it isn't good for the engine to have the hesitation.
Mopar or no car
MoPar=Massivly Over Powered And Respected!
'93 W250 Ram
'68 Charger
'67 Coronet 500 my steet/strip rod-now a 6BBL!
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Re: 6 pack fine tuning/jetting recommendations
[Re: mopeman]
#438094
08/15/09 07:07 AM
08/15/09 07:07 AM
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Joined: Nov 2006
Posts: 511
Jasper, Indiana
fastnos
mopar
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mopar
Joined: Nov 2006
Posts: 511
Jasper, Indiana
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With out being able to see in real time what its doing without a wide band O2 to reall "know" what you need its a guessing game. If I was just curious enough I might try to play with the ACCelerator shot, and even might go up to the 50cc shot pump. you might be able to give it a longer shot just with the acc linkage on the pump. But it still would be best to Beg, Borrow, or Steal a wide band O2. Not sure, but can you check with Autozone, Advance, or any of your local parts store to see if they have one in their "Loaner" tools section? (just a wide shot in the dark, but they might!)
A True Hybrid: Burns Gas AND Rubber!
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Re: 6 pack fine tuning/jetting recommendations
[Re: aarcuda]
#438097
08/15/09 11:33 AM
08/15/09 11:33 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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Go on to Promax's web sight. They have a lot of good recommendations for many different scenarios. Pick one that comes closest to your set up. Also, run the fuel levels in the end carbs about 1/2 way up the sight glasses
Last edited by Crizila; 08/15/09 11:37 AM.
Fastest 300
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Re: 6 pack fine tuning/jetting recommendations
[Re: Crizila]
#438098
08/15/09 02:48 PM
08/15/09 02:48 PM
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Joined: Mar 2003
Posts: 15,491
the boonies
aarcuda
I Live Here
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I Live Here
Joined: Mar 2003
Posts: 15,491
the boonies
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Quote:
Go on to Promax's web sight. They have a lot of good recommendations for many different scenarios. Pick one that comes closest to your set up. Also, run the fuel levels in the end carbs about 1/2 way up the sight glasses
whats the link? i couldnt find anything on their site
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Re: 6 pack fine tuning/jetting recommendations
[Re: Crizila]
#438101
08/16/09 11:29 AM
08/16/09 11:29 AM
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Joined: Jan 2003
Posts: 614
Id
mopeman
OP
mopar
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OP
mopar
Joined: Jan 2003
Posts: 614
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OK, an update...when I first got the carbs the yellow springs were installed by Holley. After the first run and a pretty good bog I dropped down to the short yellow and the same thing happened, then the white springs went in and same thing maybe a little worse. Felt pretty cool went the outboards did kick in, but I knew it wasn't good for the motor. For some weird reason I never thought about going the other way with the springs, every post I read said to go to the lower springs. Well after the first reply (thanks macmic87) I went out a put in the purple springs and it was a heck of a lot better! The transition was alot smoother and the outoards were'nt crashing in. So now I have the brown springs in, and there is just a slight ssssssststudder. I will try the black today and see what happens. Maybe it will be gone, but if it isn't, I'll be back.... 
Last edited by mopeman; 08/16/09 11:32 AM.
Mopar or no car
MoPar=Massivly Over Powered And Respected!
'93 W250 Ram
'68 Charger
'67 Coronet 500 my steet/strip rod-now a 6BBL!
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Re: 6 pack fine tuning/jetting recommendations
[Re: mrmopardan]
#438104
08/16/09 01:43 PM
08/16/09 01:43 PM
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Joined: Mar 2003
Posts: 15,491
the boonies
aarcuda
I Live Here
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I Live Here
Joined: Mar 2003
Posts: 15,491
the boonies
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Quote:
I have almost the same set up as you, but edelbrock rpm heads. I run the .509 also. I use .35 squirter 50cc acc. pump with browm pump cam and brown springs in the end carbs. Center carb has #64 jets. Drilled out the end carb metering plates with .099 drill bit (or #84 square jetting) I have no bog now & the car runs like a scalded ape . BTW the end carbs operate on ventura vacuum not engine vacuum. 
I have almost the same setup on my 416. bigger cam though. everything is the same except i have the purple springs in the outs
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