2 - quads vs sixpack on '67 440 hp

[66Satellite47]

Six Paks are great once you get tuned up. In the early days most folks didn't figure out what the tune up needed. Six Paks are really good once you get the tuning correct. Pull the plugs on the end carb idle screws. About 1/4 to 1/2 out makes the car run great and really helps full throttle transition.

 

[Geri]

I never see any 440s with 2 quads on the. At least not on a 67 Plymouth Satellite. Why not? Does that not make a descent set up? Or is the 6 pack better. I'm running a 850 pro Holley right now,915 heads ported polished , headers 3" exhaust, digital ignition, 373 rear end. Am I crazy to thin that 2 - 4s would be the ticket, or, do I go with the 6 pack or stay with the po Holley.What brands and models in the intake and carbs? I could look for advise on the internet, but experience always wins out over paper tests.

for looks the duel quads are great- for performance a good six pak will outrun them. best of all an early tarantula manifold for single 4 bbl with a 5/8" spacer.

 

[Geri]

heres a NON Mopar comparison of 2 x 4 VS 3 duce.

that being said, the six pack looks kinda cool, works pretty good. but the CH 28 properly tuned should smoke a six pack.

I disagree- the six pak will run circles around duel 4 bbls, IF carbs are tuned correctly, dealers choice though.

 

[Geri]

I disagree- the six pak will run circles around duel 4 bbls, IF carbs are tuned correctly, dealers choice though.
I also think- the Holley carbs will always run better for performance, the carters will be better for street, duel 4 bbls on a 440 in my gasser in the 70's ran 11.80's @ 122 same tunnel ram with holleys ran 11.15 @ 128,engine had only a good crane came-stock rods/pistons ,factory heads. same car with injected 426 hemi ran 9.60s At 145

 

[66Satellite47]

for looks the duel quads are great- for performance a good six pak will outrun them. best of all an early tarantula manifold for single 4 bbl with a 5/8" spacer.

The early TM 7's With an 850 DP is really hard to beat. My Weiand 2x4 tunnel ram with two 650 DP's was about 1 1/2 to 2 MPH faster. ET was really about the same.

 

[lewtot184]

having played with 6paks since 1970 and the edelbrock dual quads for about 3yrs I can say there are some differences. will a 6pak run circles around a ch28?...nope. will a 6pak make more power than a ch28? I think they will due to the intake flowing a little more air, but not any big numbers .

 

[rumblefish360]

The “Engine Masters video”

This match up is not a accurate showing for the six pack for a good reason.

It’s not a MoPar intake and carb set up.

That Chevy 6 pack uses the same size carbs all around unlike the MoPar 6 pack which uses the small cfm center and two large (500) cfm out board carbs.

This test is bogus for MoPar guys.
However, it doe’s help us go “Fishing” for fools that think they know (after seeing the video) that they “Have is by the balls” and race us.

While the 6 pack has its limitations, being a dual plane in the 2500-6500 rpm range, in this area, it should be (and is IMO) a super flexible and excellent street strip intake.

For an “Ancient” design, it rocks.

 

[Geri]

'67 440 hp
View attachment 524208

nicely done sir.

 

[biomedtechguy]

There was a beautiful 67 Coronet R/T at a close friend's shop. Stroked 440 to 505? Nice valvetrain, aluminum heads, etc. Nothing too radical, auto trans and the Edelbrock dual plane 2 x 4 setup linked to early in this thread, that are available new. Looked like maybe 2 x 600 cfm Edelbrock carbs. Ran like a raped ape! Dangerous to floor it in 1st and even low speed 2nd as the tires would spin like crazy.
Having said that, I am amazed at the massive power the 6 bbl 440 has over the 4 bbl 440 i had back in 78. When those outboard carbs open...WOW!

 

[66Satellite47]

6 Pak's are great, the early versions needed a fair amount of tuning. For some reason, don't know why, but '70 carbs worked the best, with very little tinkering. Pull the end carb idle plugs, go about 1/4 turn more and then figure out which secondary vacum springs it wants. Main jets in the center carb may need to go up about 2. Squirter may need to go up about 2. Six Paks will work great if you spend the time to figure them out.

 

[Geri]

I never see any 440s with 2 quads on the. At least not on a 67 Plymouth Satellite. Why not? Does that not make a descent set up? Or is the 6 pack better. I'm running a 850 pro Holley right now,915 heads ported polished , headers 3" exhaust, digital ignition, 373 rear end. Am I crazy to thin that 2 - 4s would be the ticket, or, do I go with the 6 pack or stay with the po Holley.What brands and models in the intake and carbs? I could look for advise on the internet, but experience always wins out over paper tests.

if you have an automatic tunnel rams are a bad idea. they have to be so rich at idle to accelerate well, they mostly stumble at launch..
only the factory Holleys for the Mopar 6 pak will do. I've run single 4 bbl., tunnel ram, duel quads, crossram SS manifold and long rams from the Chrysler 300's 58-64. the best is the factory crossram but they must be jetted per factory spec or you have a slug on your hands.

tunnel rams move air and make good power.

 

[Geri]

Sputnik, I am presently running a Weiand tunnel ram w/ two 750 eddies, only a blower is cooler to look at, and only a blower will make more power than a tunnel ram, this is the third 440 I have had that I have had a TR on. this motor is a 509 w/ a .590 PS cam(old) all the tuning consisted of putting larger jets in the secondaries, went from .118's to .135's, wala done deal!!!! If you decide to try one you will never go back to anything else!! Dave.

IF- you can live with a hole in the hood...I put a tunnel ram on a 1969 Cuda 440, with 3.90 gears ,505 cam and tunnel ram it ran 11.18 @ 121 with stumble I had stock converter.

 

[dvw]

We run a all steel stock body/interior/chassis 65 Belvedere. 440, 10-1, box stock Eddy heads, .557 Mopar solid, CH28 , 2 box stock Eddy 600, 4.10, 9x28 slick. Runs solid 11.30's@117. Simple and quick. Same combo when it had 906 heads 11.6-11.7
Doug

 

[Geri]

We run a all steel stock body/interior/chassis 65 Belvedere. 440, 10-1, box stock Eddy heads, .557 Mopar solid, CH28 , 2 box stock Eddy 600, 4.10, 9x28 slick. Runs solid 11.30's@117. Simple and quick. Same combo when it had 906 heads 11.6-11.7
Doug

sounds like a fun ride- wish I had kept my factory plymouth SS car I bought in '63.
$2904.00 out the door. as delivered with gear change to 4.56's it ran 109 at 12.60s on Bruce 7" wide recapped slicks, I love my mopars

 

[Rick62]

Not sure that the tunnel ram makes much more power than a good 1 x 4 manifold combination.

If that's true, why did all NHRA ProStock cars use a 2X4 combination before going to EFI?

 

[Geri]

If that's true, why did all NHRA ProStock cars use a 2X4 combination before going to EFI?

the pro stocks use manual trans (launch RPM) Holley 1050,1150 and 1250 dominator carbs, you cannot compare a pro stock car to a street car. PS I am the one who designated the rules for pro stock in 1981 , the weight- 2350 lbs car and driver, 500 cid,2 x 4 bbls, gasoline

 

[Garys1969RR]

IF- you can live with a hole in the hood...I put a tunnel ram on a 1969 Cuda 440, with 3.90 gears ,505 cam and tunnel ram it ran 11.18 @ 121 with stumble I had stock converter.

That's a great time in the 1/4 mile! Were you running the stock 906 heads? And what was the duration on the 505 cam? Haven't heard of that one. Or did you mean to say 509 cam? What kind of rocker arm set up? I suppose you were running headers too.

 

[Geri]

Six Paks are great once you get tuned up. In the early days most folks didn't figure out what the tune up needed. Six Paks are really good once you get the tuning correct. Pull the plugs on the end carb idle screws. About 1/4 to 1/2 out makes the car run great and really helps full throttle transition.

That's a great time in the 1/4 mile! Were you running the stock 906 heads? And what was the duration on the 505 cam? Haven't heard of that one. Or did you mean to say 509 cam? What kind of rocker arm set up? I suppose you were running headers too.

the .505 is the purples shaft cam from Chrysler- been a long time ,may be the .509. yes-I ruined a gorgeous '69 Cuda fastback by putting fender well headers on it. when totally stock from the factory it ran 105MPH @ 14.00's, the engine long block never out of the car- the stock heads were on it. I also blew it up ,put a 383 in it and sold it for $700.00, this was 1971 ,I paid $1600.00 for it at a dealer with 3000 miles on it.

 

[Geri]

ir all

if you have an automatic tunnel rams are a bad idea. they have to be so rich at idle to accelerate well, they mostly stumble at launch..
only the factory Holleys for the Mopar 6 pak will do. I've run single 4 bbl., tunnel ram, duel quads, crossram SS manifold and long rams from the Chrysler 300's 58-64. the best is the factory crossram but they must be jetted per factory spec or you have a slug on your hands.

boils down to what do you like what do you have put it on and run it, they are all cool. a friend in the 70's had a stock body '68 Charger with a 440 single 4 bbl on a tarantula (lot of internal engine work) that ran 1030.s over 130 in the quarter, much respect for the tarantula manifold.

 

[wyrmrider]

SPeaking of 62-63 Mopar
we had a Stage II wedge stick shift car, later hung on the aluminum kit and switched back and forth with a torqueflyte, upgraded to stage III, found out it ran better with a fire slot in the dome- etc
Isky developed his first and ONLY .904 lifter optimised cam and we were- well I thought we were the first test car- found out later that several of us were
Later Racer Brown came out with one- really consistent I'd still use one to dial in a chassis
I just moved an early 4 speed with the companion flange not slip yoke if anyone needs it- this one is stock
I do not recommend the cross ram on the street- use the 6 pack just think of them as a 4 bbl with two secondaries- tunes just the same and well worth it
If you are looking for looks either works- but I agree- long rams on a street roadster look the bestI did one with 4-71s on it, tried a tunnel ram with a 6-71-- both worked well until a backfire... but they looked awesomne