Homemade 6 pack metering plates...

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71Twister440

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Has anyone ever tried or considered taking a set of Holley 6 pack outboard metered plates and tapping them for use of the Holley jets, creating your own adjustable metering plates? Forgive me if this is common or has been done, I searched and did not find anything. I have never seen a set of Promax or other plates up close so I do not know the difference and my knowledge of Carbs and 6 packs is minimal. I am looking to get a set for my car, but have a handful of Holley plates and was wondering if I could just tap them for the jets. Thanks in advance all.
 
Has anyone ever tried or considered taking a set of Holley 6 pack outboard metered plates and tapping them for use of the Holley jets, creating your own adjustable metering plates? Forgive me if this is common or has been done, I searched and did not find anything. I have never seen a set of Promax or other plates up close so I do not know the difference and my knowledge of Carbs and 6 packs is minimal. I am looking to get a set for my car, but have a handful of Holley plates and was wondering if I could just tap them for the jets. Thanks in advance all.
See the two small holes at the bottom edge of the plate (near the numbers)? Those are the jet orifices. There is no way to drill and tap those for jets. There is no room.
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IIRC, Pro Max carbs also makes some as well and these upstarts below;
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I called Holley to ask about these Quick Fuel plates, and the tech support actually told me they arnt as good as the Promax ones, they even went as far as to not recommend them because they arnt as "adjustable". I find this hard to believe considering once you have tapped ports for jets, that's where your adjustability comes into play. Anyone have real world exp with these different brands of plates? Between the Promax plates and fuels lines, jets/springs etc and time to tune this 6 pack, I hate to say it but I could buy a brand new 4 Barrel Carb and manifold and make my life simpler. I really don't want to go that route because honestly a 6 pack is awesome and I see very few people around me still running them.
 
A 4bbl. is cheaper and easier to pay for, assemble, tune and run. Fact. Period.

The dual-quad & 6 pack is an old age answer to increasing performance when there were no big 4bbl. Carburetor’s available.

What was found with the 6 pack was a super flexible & capable set up. It has an edge over a single 4bbl. where the single carb may very well be a case of too big and drivability suffers.

Today, the person running a 6 pack does so because they want to. Nothing more, nothing less.
I want to. Just because is my answer.
Still sonic checking blocks. I have a decent useable block, still searching for better. I’m otherwise ready to go.

ProMax metering block in the center, end carbs have the metering plates removed for there jet plate, end carb has there base plate.

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I also have a set of mechanical units that I’m waiting to have restored. Below, these are not mine but a stolen picture of what they look like I saved for reference later on down the road.

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I also have a set of mechanical units that I’m waiting to have restored. Below, these are not mine but a stolen picture of what they look like I saved for reference later on down

I hear ya dude, I love this setup and look, they really dont run bad just a little rich, i get a slight hesitation when I wack it. But again im gonna be 500 more into the setup just for parts to tune it. Then paying someone to tune or help me tune it, that right there is a new 4 barrel and intake setup, bolt and go! Awesome setup I have two 440 blocks if you are in and around the NY area and wanna come take a look Id consider parting with one of them.
 
Not trying to be a dick but try answering outside the quote tags.

I’m on Long Island and I currently have 2, 6 pack set ups not yet off the ground. Small Stroker small block (372) on B engine. CID - TBD.

Your paying to have someone tune it is the $$$ downfall where you need to learn the system via “Trial by Fire.” Which sucks one way, but totally awesome in another because then, and only then, “You will know!”

Now with a grain of salt, not having been there yet, I don’t see what the problem is. And that I may find out when I get there. But as described by those in the know, this is a 4bbl. But with 2 extra secondary ends and with idle circuits on each carb.
(Sounds like upgrades Holley’s.)

Way back when..... LOL..... an old mentor/local hot rodded told me when I was a teenager, this system is simple a monkey can do it but it just sucks to disassemble it for every jet change.

He said;
“Tune your primary first. Then go to the secondary side. Don’t change the springs until it is otherwise dialed in.” In which I spoke with another member here who did a mod to the air passage to the vacuum secondary pods. He drilled them out larger and installed jets to regulate the system to his liking.

The only difference between them and now are the upgrades parts that were not available then.
Best of luck and wishes on your tuning days.

I maybe in for a hard time but a challenge is always good to keep the brain healthy.
 
Not trying to be a dick but try answering outside the quote tags.

I’m on Long Island and I currently have 2, 6 pack set ups not yet off the ground. Small Stroker small block (372) on B engine. CID - TBD.

Your paying to have someone tune it is the $$$ downfall where you need to learn the system via “Trial by Fire.” Which sucks one way, but totally awesome in another because then, and only then, “You will know!”

Now with a grain of salt, not having been there yet, I don’t see what the problem is. And that I may find out when I get there. But as described by those in the know, this is a 4bbl. But with 2 extra secondary ends and with idle circuits on each carb.
(Sounds like upgrades Holley’s.)

Way back when..... LOL..... an old mentor/local hot rodded told me when I was a teenager, this system is simple a monkey can do it but it just sucks to disassemble it for every jet change.

He said;
“Tune your primary first. Then go to the secondary side. Don’t change the springs until it is otherwise dialed in.” In which I spoke with another member here who did a mod to the air passage to the vacuum secondary pods. He drilled them out larger and installed jets to regulate the system to his liking.

The only difference between them and now are the upgrades parts that were not available then.
Best of luck and wishes on your tuning days.

I maybe in for a hard time but a challenge is always good to keep the brain healthy.


Is this better? I got fat fingers and was dealing with a terroristic 3 year old! Also, I was speaking with a member about tuning and teaching me some last year, but ran out of money and time so hoping to rekindle that conversation sooner than later.
 
Is this better? I got fat fingers and was dealing with a terroristic 3 year old! Also, I was speaking with a member about tuning and teaching me some last year, but ran out of money and time so hoping to rekindle that conversation sooner than later.
LMAO! Why—- yes it is! LMAO

OMG! 3 year olds! Love’em! But trying they are!
 
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