Tuning Tips for Mopar 440 Six Pack, Six Barrel with Air Fuel Gauge

[@JustMoparJoe]

This video is absolutely needed! Too many carb hacks out there who couldn’t tune their way out of a corner. Good information! Great content!

[@JustMoparJoe]

I watched until the end. Super great video, editing, and work! Car is awesome. I’m partial to the white 70 Kowalski challenger.

[@vintagevalhalla7523]

Thanks, I appreciate that! When I started building it, I wanted to clone it out to the Vanishing Point Challenger half-way through the movie when it was mildly beat up. I was the only one who thought that was a good idea 😅. Unfortunately, I got carried away and made it nice, so I probably won't be blasting around off-road anytime soon. Halloween is coming up, maybe we need to get our hands on some 70's leather vests and good Kowalski wigs? haha.

[@rtcharger7484]

Went trew, All that with mine, Starting at base line & making notes, makes it easy to Tune,,

[@JeffLeblanc-xb7qe]

You know how to make them 6 packs run well done I watch a lot of your vids

[@unozapato]

Thanks for the very informational video! I'm new to the six barrel, so this documentation of your step-by-step/trial and error tuning will be very useful to me and many others.

[@vintagevalhalla7523]

I'm glad it was helpful! Thanks for the comment.

[@woodey028]

Great video. I'm going to apply the techniques you described to my 340 six pack set up. The QFT meeting plates are a great idea, also I had no idea what those screws were called. I was very fortunate to find and purchase brand new Holley carbs for my set up. P.S I gave you a subscription:)

[@vintagevalhalla7523]

Thanks! Best of luck with the 340. In my opinion, even though these six packs aren't cheap and a little more work to tune, just popping off the air cleaner and looking into the engine bay makes it all worth while 😁

[@duanedahl8856]

Interesting, I bought a new set of repop MP carbs back In the early 1990s when I worked for a dealer...I lived in Salt Lake City at the time, the elevation was just over 4000 feet...I had a hot 440 with a .509 cam...and I never needed to mess with the outboard carbs..they were cool for a minute, but I'd never run one again. Awesome tech for the layman.

[@vintagevalhalla7523]

Thanks for the feedback!

[@jeffmueller9059]

Watching this made me check some settings and found a crack in the plastic vacuum T for the outer carbs

[@vintagevalhalla7523]

I'm glad it was helpful!

[@mikedaugharty5544]

I thought your video there was very informative and it was very easy to understand and very well laid out in a process of trial and error good job there I took my idol speed restructures out in the end carburetors and that in my opinion for my situation that really helped as far as getting the center carb come down off of the idol transfers and I did drill I did drill holes in the secondary carburetors outboard carburetors small hole that also helped like crazy too now I'm kinda right at the point of yeah the center carb is just about totally closed and I probably should have went just a little less on the drilling of the holes on the plates I may take and just JB Weld them up a little bit at some point but right at the moment it's working pretty good good job there

[@vintagevalhalla7523]

Thanks! I appreciate the feedback.

[@jarmominkkinen9409]

I HAVE GRATE RESPONS ON THE SIXPACKS!! Wedge Tunnel Ram intake have even plastick befor the runner plenium..Hyd Roller cam.Wedge Alu Heads folly ported with 0.585 lift flow Nr are good 310 Cfm..Thes 440cui Engine are in may Challenger 70Se..Fantastisk car Prepped 727 GV overdrive 3-Member 4.10 gear..Have even Nos system Proshot Fogger.Testing first with 25Hp have wery smal jets.Have run with Nos no problem with that.Thes Challenger are real street Car...Good Nr 1.45 1.50 liter 10km esy draving on the Highway The Rpm are 1800Rpm Have 28 inchTire Hi!! Thes Engine Give Abaut 620-630 Hp...May SIXPACKS are fylly Modifaid Good parts..Grate idel Grate A/F Nr 13.6-13.7 On the Highway 13.1-13.2 ...Happy Engine 👍🖐

[@Prostreeter64]

Can you share with me where you purchased your air fuel gauge and what brand? can you also share with me your engine idle vacuum number as well as your power valve size? Thanks for the video. It’s informative and helpful for those of us trying to tune, six barrels and six packs.

[@vintagevalhalla7523]

Sorry for the late reply! I haven't been on here very much lately... My engine idles at 11 in. Hg. I am happy with this number considering the size of the cam. My power valve is the factory 6.5 size. My Air Fuel gauge is an Autometer Pro-Comp Ultra-Lite wideband. The Autometer part number is 4378 and I got it from Summit Racing. They aren't cheap (currently about $370), but IMO they are pretty much a must to get a good tune on these things.

[@spchallenger340]

So just some clarification on the 500 end carbs ... I also have a 340 Six-Pack set up .. looking for some spare ends 500 carbs original parts numbers are 0-4790 rear and 0-4789 front .. i found both but between the price to buy and restore is crazy.. so I purchased a new center from Holley 0-4792 350 CFM .. I see they no longer remanufacture the end 500 carbs for the 340.. so I have been looking at the 500 CFM carbs for the 440 engine 69/70 Holley 0-4365 and the 1971 440 engine 0-4672 .. I've been told the 69/70 has a different style metering plate and the 71 has the same style metering plate that my 340 end carbs have in them, just a different jet size. Question: will either of the 440 end carbs work on my modified 340 ? and if so should I go with the 69/70 or the 71 carbs? Any help would be greatly appreciated from anyone who has dealt with this scenario. Thanks

[@vintagevalhalla7523]

I apologize as I haven't even looked at my channel for nearly a year. According to Larry Shepard's, "Six Pack Engine Handbook," the only difference between the 340 and 440 end carbs is that the 340's had a fuel distribution tab on the nozzle of one throttle bore. I don't see why 440 end carbs wouldn't work so long as they are the same actuation as you need (vacuum vs mechanical). If I were you I'd go with the 70-71 range end carbs with the six-sided metering plates. My reproduction end carbs had this style so there are probably more plates floating around to drill out to your desired size.

[@StevenReaves-d7g]

Seems to me that a person better know what they are doing 😢😢😢😢

[@aleksandarivanov3145]

why bother buying special 5/32 tool when you can grab any piece of steel, angle grinder and make yourself a tool. Be creative

[@vintagevalhalla7523]

Point taken, but carb fasteners are sensitive to over/under torqueing. I probably could have made a slot screwdriver work, or made something, but the tool was cheaper than the fuel (and time) it would have cost me to go buy some steel round and I'm not running any risk of stripping the fastener head due to an imprecise fit.