I hate carburetors

[Officer Higgins]

Yeah man six pack carbs are totally cool and from what i understand run great when dialed in. I have one afb had harms restore it and works really well better then any rebuild i did on it. There was a kid on YouTube that was having idle problems, guy did alot of work before finding out that his gas tank had 40 years of crap floating around that it contaminated the carburetor idle circuit. Always think about that when mine idles erratic. Stuff was so fine fuel filter would clog or get through.

 

[rumblefish360]

I've always thought that you 6-pak guys were glutton's for punishment ! One carb is tough enough for me. Keep at it, Real Men Run Carbs !!

Well, maybe a little bit.... Ha ha ha ha
There just a double secondary carb with idle capability on all barrels.

One small thing that I'll add, is don't get hung up on what the 'base settings' are..I noticed you mentioned that. With your setup throw those out the window, it's likely going to need its own specific adjustments... There are so many variables with environmental conditions and modified engines you can't go by what someone else uses or most books even. Just try to give the engine what it wants

I suggested starting at the base setting/jetting as a bad line to start with and believe it is the right way to start this for anybody. Don’t assume! Know!

Someone mentioned a big drop in rpm from idle into gear? That is normally a lean condition. An air leak could be the problem or lean on jetting.

 

[Slap Stick]

The big drop was between park and neutral.

 

[rumblefish360]

Now that’s weird.

 

[dla4567]

The big drop was between park and neutral.

That’s a transmission problem

 

[Budnicks]

this is a great book, detailed cause & effect
a bit wordy at points, but it spells it out very well
talks about everything you need to know
Information is key, you just need the right info...

 

[WileE]

You running the 509 straight up ? Have you degreed it ? Long time ago, ran that cam , I remember not getting enough vacuum signal to the idle circuit, so I had it opened up, which helped.

 

[dla4567]

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this is a great book, detailed cause & effect
a bit wordy at points, but it spells it out very well
talks about everything you need to know
Information is key, you just need the right info...
View attachment 632267

View attachment 632272 View attachment 632278

I respectfully disagree about the six pack handbook. I thought it was a terrible book that lacked most of the info you would want about the carbs and tuning. Also some of the info is just wrong or misleading. (That’s my opinion.) The Holley books are good and Holley puts some good videos on YouTube.

 

[OH71RRunner]

I have the six pack handbook. And I've done a lot of reading. The problem is me explaining some things incorrectly and it's hard for you all to diagnose over the internet when talking to somebody not 100% sure of what they're explaining.

I guarantee if it was in front of you, you'd have it figured out in minutes.
I think I found some of my problems.... too low of octane.

Here's the story on the car.
The motor was built back in 2001 by a guy named Dick in Urbana, OH. The block had machine work done, internals done, heads ported, and the transmission "race" built. He said it was a "high 9, low 10s car". He worked on Mopars and built quite a few race motors for local guys from what I've understood.
I have some of the paperwork from back then.

I had it running great once last week. But, I had a huge scare when the throttle stuck and it started spinning tires shifting to 2nd.
Then had a speck of something on the float thing and it was dumping fuel in. Had to pull the carb off. I thought I had enough of the mix still when I put 5 gallons of 93 in it. I'm guessing the 93 dropped the mixture too much.

There's a long history to this car being abused and neglected before I got my hands on it. I'm trying as hard as I can to fix the things that were wrong or bad. I've never had a race-built motor before. I've driven powerful cars before, but nothing like this. I've worked on cars before, but again, nothing like this.

I'm trying. I really am.

Thank you all for the help. We'll eventually get it, even with my lack of experience. Just continue to have patience with me.

 

[451Mopar]

If you are the type that wants to learn how to tune these things, then there is a learning curve and experimentation costs involved.
If you just want it running right, pay a professional engine tuner, preferably that has a chassis dyno. It will be quicker and likely cost less than trying to do it yourself.

 

[68 HEMI GTS]

Put the time in and do it yourself. I would highly recommend a quality A/F meter to take out some guess work. Providing the cam is in with enough advance and your distributor is also got a good curve with plenty of initial you should be able to get a handle on it. First thing about Holley’s is you gotta run a good quality filter in front of the carbs. Sintered bronze is the best. Earls sells some nice AN ones. Without that you’ll chase your ***. Also gotta make sure the fuel supply and pressure is up to the task. They only need 5-5.5# pressure. Once all that’s dialed you can really start tuning on it.

 

[dla4567]

Do a compression test and see where your at. I fought my carbs for quite some time. Once I switched to race fuel tuning was easy.
When it comes to old cars, you have to enjoy the journey.

 

[OH71RRunner]

I have the little gold colored filters on the inlet lines of carbs. I replaced the fuel pump last year as it was recommended to make sure I had a good fuel pump. Carter mechanical. I don't know the pressure, but it has pressure to the carbs.
I was having timing issues last year and replaced the distributor with a new MSD distributor. Black bushings, one light silver and one heavy silver springs. NGK plugs gapped at .045. 8.5mm plug wires.
I want to get an A/F meter, but money is really tight now. In a sense, I'd love to be able to take this to somebody, but I'd never learn anything if something gets off. I know there's a learning curve. It would be soooooo much easier if this car was closer to stock.

 

[68 HEMI GTS]

You’ll get it, with the 509 cam it may need some bypass air (holes in the plates) to get it to idle and be able to close up the plates on the center carb. Some guys act like that’s the end of the world, it’s not. Bronze filters in the bowls are good! Make sure you’re only using Holley gaskets and parts in the carbs. It really just a four barrel with an extra set of secondaries.

 

[Budnicks]

I respectfully disagree about the six pack handbook. I thought it was a terrible book that lacked most of the info you would want about the carbs and tuning. Also some of the info is just wrong or misleading. (That’s my opinion.) The Holley books are good and Holley puts some good videos on YouTube.

I posted them 2 Six Pack books for reference

the other books & dvd etc.
I showed were of value, as I stated in my post...