Six pack...

[MAPS]

Calling all Mopar Gurus...

I rebuilt my engine this year,
last yr I had this problem with the car running rich, so I figured once this was done we would get the car running properly.
The mechanic seems to think it's ok but I know this is rich, too rich. . I've had six packs yrs ago and they never ran rich like this.
Now the idle mixture on the middle carb had been played with but I think it must be the front and rear carbs that have their own on the face of the carbs, that are not adjusted properly.
Does anyone have any idea how much these screws must be turned if say you close them all one way, how many turns, half turn etc do I go with. I'm really lost with this problem and it's really bumming me out.
Engine has 10.5 compression, solid cam (555 lift) with 1.5 rockers...
It has only 30 miles on it as I just took it out but it's running too rich, can it be also cause the engine has not broken in yet ?

Any, every, no matter what... Help will be appreciated.

 

[Kendog 170]

I don't know much on this but I had a ford tri-power setup on my old 56 F-100. The idle jets were eliminated on outer carbs and idle mixture was only set from the middle carb. Very easy to adjust. I don't know if you can plug them or just close them an adjust the middle carb. Maybe someone can add to this?

 

[Jeremy McManus]

Not an expert, but have had Six-Packs, Cross Rams with Holleys, and have messed with them quite a bit. A good start is to turn the idle mixture screws in all the way and then back them out 1 1/2 turns. This is a good starting point. With the motor running turn each one in slowly until the motor starts to stumble, then back out until it smooths out. If it smells Fat while running and driving, you might want to go down a bit on the jets. Remember, the Holley jet number does not always denote the actual jet size, so be sure to check the chart.
Good Tuning. Beautiful Set-up! Love Six Packs and Cross Rams!

jere

 

[Jeremy McManus]

6 pack tuning

 

[famous bob]

Not an expert, but have had Six-Packs, Cross Rams with Holleys, and have messed with them quite a bit. A good start is to turn the idle mixture screws in all the way and then back them out 1 1/2 turns. This is a good starting point. With the motor running turn each one in slowly until the motor starts to stumble, then back out until it smooths out. If it smells Fat while running and driving, you might want to go down a bit on the jets. Remember, the Holley jet number does not always denote the actual jet size, so be sure to check the chart.
Good Tuning. Beautiful Set-up! Love Six Packs and Cross Rams!

jere

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^above ^^^^^
You could always get a vacuum gauge and fine tune the above settings to the highest idle rpm , /keep adjusting the idle speed screw accordingly .

 

[rklein383]

Mopar designed the outboard carbs a small potion of the idle circuitry to allow some fuel usage from the outboard carbs so that the gas in the float bowls would be used and not stagnate in case you never opened them up, like that ever happened. Anyhow, they were preset and leaded over from the factory, leaving the center carb for tuning. I set my outboards at 3/4 turn out as a starting point. My center carb would kill the engine if the air fuel mixture screws were turned all the way out or all the way in. I knew I was good then and never messed with the outboards again.

Remember, main jets limit fuel flow at WOT. Change your power valve if you are fat during normal driving.

Also, make sure your ignition system is perfect. A poor spark can mimic carb problems and mess with even the best tuner.

 

[Frank Mopar]

Not the answer but there are some explanations about big cams and carburetors.
Carburetor Tuning: Cure Big Cam Sag - Hot Rod

 

[Daves69]

You might take a look at the linked pages (pictured below) on this page >>>>>>>>>>>> The 6 Bbl tips