I know this question has been asked a dozen times just couldn't bring any of old ones up. 70RR non matching air grabber, 4spd, 3.55 gears. 493 stroker. Which would you run 4bbl on CH4B manifold or six pack?

6 bbl

The CH4B is a decent intake, but if you have any decent amount of head flow, the 6-pack will outflow the CH4B. Now if it was a performer RPM vs a 6-pack, well then it more boils down to how much you want to pay for the cool factor of the 6-pack because the performance is the same between the two.

In a 70 RR air grabber 4sp with a stroker, I'd go with the 6-pack just so I could throw on the 6-pack decals for the cool factor.

Big cubes work well with the 6 barrels.

I ran a 6 pac on my 470 for about 6 years and I tuned on it and I got it to run real good it went 11.07 in the 1/4 full trim street car,then last year I switched to a 4bbl,a street dom intake with a holley 1000 and with a bunch of tuning I got it down to 10.89,maybe with a better intake it might run better. Thats what I got.
EDDIE B

6pk

You tell me... FWIW a RPM and a good holley will run just as strong, but it won't look 1/2 as good.

in my opinion, the 6-pak is more versatile than a large 4bbl; which you will need to feed a big engine. the small center carb drives nice, good throttle response. i also like the vacuum carbs for street use. tuning can be a little bit of an issue, but i blame most of that on bad advice. the only real issues i've dealt with on 6-paks was richening the idle circuts on all three carbs and richening the main metering on the center carb. also check for manifold fitment. edelbrock hasn't figured out how to machine them correctly. maybe in another 40 years they'll get it figured out.

The 6 pack is hard to beat up to 450 - 500hp on a street engine;

Part #1

http://www.hotrod.com/techarticles/hrdp_0712_mopar_intake_manifold_comparo/index.html

Part #2

http://www.hotrod.com/techarticles/hrdp_0801_mopar_intake_manifolds/index.html

6 pack advantages;

- far outperforms other factory B or RB intake/carb combos (with the possible exception of the MW crossram, but the six pack would still be better for the street)

- looks way cool!

6 pack disadvantages;

- cost

- some of the better 4bbl intakes will outperform 6 pack at higher (over 450hp) levels.

yes, I might be a little biased, though the articles speak for themselves




Dave

I love dat sixpak on my 496 stroker and when the end carbs kick in........SSSWWWEEEEEETTTT

What about on an otherwise-stock or nearly stock motor, say like the 400 in my 73 wagon? Other than the cool factor, any gains to be made by swapping the 4bbl for a 6bbl setup?

Six paks rule!

Any properly tuned six pak car will outrun it's 4bbl equivalent. Unless you have owned/driven a properly tuned six pak car you have no clue what you are missing.

Properly tuned means you used the search function here on our beloved moparts to find the latest revision to "the guide to tuning six paks" You then printed it out and read it more than several times and understood it - heeding the important advice in there before you took a wrench and screw driver to the carbs.

Not one real world test other than the links to the hot rod magazine tests has ever given the 6 pak it's fair shake.

BTW You can [properly]port a six pak manifold to flow better...Just contact Ryan at Shadydell for assistance!

It's not a about total horsepower at the big end it's about the journey to get there, just like the two real world motorcycle riding sayings...it's not the destination it's the journey and if I have to explain you won't understand.

2 barrel until you need more.

Six packs look cool but a single four-bbl carb on a good intake will cost less and make more power. All depends on what you're trying to do with the car.

Another option is the Edelbrock dual quad intake. I just did some dyno work with the Eddy dual quad and twin Eddy carbs and that was a really sweet setup. Article is in the tech archives if you're interested. That setup also looks pretty nice with the Edelbrock air cleaner.

http://www.popularhotrodding.com/tech/1007phr_big_block_mopar_engines/index.html

Money to blow, go the 6 pac route. With your hood, big cube motor, a Holley SD and a 850 double pumper should work really nice. And run harder. I'll take a double pumper over a sixpac, with a four speed, any day, just plain more responsive. Unless your power shifting.

i'll add one more for the 6pk. it's very cool,love the sound when they all come in and the mpg while crusing on the center kicks a 4brls azz. when i had a 4barl 12 to 15 was the best mpg crusing, 20 to 22 mpg with the 6pk crusing. more is better.

I just finished Re-reading an old Mopar magazine with the big maniflod shootout on a 440 article a couple days ago. If I remember right, the 6 pack out of the box (manifold and carbs) made 583 hp on their test motor, the 950 hp carb/Holley strip Dominator manifold combo made 585 with a few less torque numbers, the M1 made the same and a Victor made 593.

My dad runs a sixpack on his 496 and I have a hard time believing that a 1050 and Victor would be worth the money at this stage. A little faster, maybe. Simpler to work with, matter of opinion. I think 1200 bucks will go elsewhere in the car first though.