440 6-pack running to rich

[70sixpkrt]

I just pulled #7 and #8 plug since those were the easy ones. I am running rich. I have 78 on the passenger side and 83 on the drivers side. What number should I go with? I am using NGK-BCP6ES plugs gapped to .45. It is timed at 14 initial and 35 total. I ahve the Eddy heads, aluminum manifold with the blocked valley pan. Should I have staggered jetting?

[Animal]

Ground strap shows no heat , what are the cam specs? how much idle time is on those plugs? , have the carbs been set up correctly , are you running a vac can? , maybe the motor might like a little more spark advance @ idle.

Check the PVs , maybe go to a #5 heat range plug , what's the CR?

[oldschool]

when i use to run a 6-pac w/ a mopar .557 solid cam my jets were the same on both sides.i also remember the jets being in the low 70's.also check your power valve,you might need a lower one depending on your idle vaccum.

[471_Magnum]

Factory jetting on a six pack is like 62 or something... REAL lean. It's unlikely jetting is the problem.

You've got eddy heads, which means no heat cross over, so you're choke won't function properly. It's probably opening way too slow and fouling the plugs. You'll probably need to convert to a manual choke, or ditch it altogether.

[70sixpkrt]

Choke is disconnected. The cam is Straightline Cam 234/242@.050 540/525 solid with 112 lsa. Power valve is 4.5. Comp is 10.25:1. I changed the plugs before I went to Pinks All Out. Ran it once and then the drive home. All together about 100 miles on them. I have 14" of vacuum.

[oldschool]

are only the rear plugs fouling? could be something with the rear carb. are all the carbs stock? have the outboard metering plates been drilled larger? there are also two idle mixture screws in the baseplate,check those too.when idleing check to see if fuel is dripping in the center carb. if it is replace the power valve,or check the fuel level in the bowls.

[firefighter3931]

Ricky, i would look at the ignition wires for excessive resistance. Get an ohm meter and start testing. 

Those plugs are the correct heat range and the carbs were dialed in on the dyno at MEW correct ?

One other thing is your PV....with as much idle vacuum as you have i would use something in the 8.5 range.




Ron

[70sixpkrt]

Ron yes the carbs. were dialed in on the motor on the dyno. For some reason when pulling in and out of the garage I can smell it real bad. I just got off the phone with Ben at Promax and he said maybe go with 80 or 81s on all 4 corners. He said it looks like one side is hotter than the other.  He aslo said it can be my mixture screws on the outboards.

[firefighter3931]

Ricky, the rich smell at idle has nothing to do with the jetting.....the idle mixture circuits in your 3 carbs control that. Try squirting some carb cleaner into yout idle bleed holes because they could be clogged up. If that has no effect then the next step is to adjust the idle mixture screws as Promax suggested.

As i mentioned earlier also look at your ignition....weak spark will send lots of unburnt fuel out the exhaust.




Ron

[70sixpkrt]

Ricky, the rich smell at idle has nothing to do with the jetting.....the idle mixture circuits in your 3 carbs control that. Try squirting some carb cleaner into yout idle bleed holes because they could be clogged up. If that has no effect then the next step is to adjust the idle mixture screws as Promax suggested.

As i mentioned earlier also look at your ignition....weak spark will send lots of unburnt fuel out the exhaust.

Thanks for your suggestion Ron. I will try the carb. cleaner this weekend. As far as the ignition, I will have to get an ohm meter to check the plug wires. The wires are 2 yrs old and look good. It looks like I have a nice strong spark. I am wondering if the mixture screws in the outboard carbs are too far out. I remember last time I was checking the mixture on the center carb, the motor would not stumble when turning in the screws. Ben said that can be an indication the outboards need to be turned in a tad.

[oldschool]

when i ran a 6 pack set up, i remember the base plate idle screws on the outboard carbs being opened just a little bit. maybe 1/4 out,it was not much.

[70sixpkrt]

Before I change anything, I'm going to play with the mixture screws on the outboards. I think I have them out too far.

[firefighter3931]

Before I change anything, I'm going to play with the mixture screws on the outboards. I think I have them out too far.

Let us know how it turns out Ricky....give those blleds a squirt while you have the air cleaner off. 



Ron

[70sixpkrt]

Let us know how it turns out Ricky....give those blleds a squirt while you have the air cleaner off. 

Will do Ron. I talked to Cab Burge over the phone and he gave me some tips. Nice guy. He races 6-packs.

[62 Max]

If you are out more than a quarter turn on the end carbs,you are going to probably be too rich.They are very critical and you can't set them with a vacuum gauge.

[firefighter3931]

If you are out more than a quarter turn on the end carbs,you are going to probably be too rich.They are very critical and you can't set them with a vacuum gauge.

Listen to Max....he knows the 6-pack induction system and how to make it work 


Ron

[70sixpkrt]

If you are out more than a quarter turn on the end carbs,you are going to probably be too rich.They are very critical and you can't set them with a vacuum gauge.

I have not had time to check it out but I want to say the end carbs. are about 1/2 to 3/4 out. I think that is my problem. I won't be able to work on it unti next weekend. Thanks!!!!