I got to thinking, has anyone ever had a triple one barrel setup on there slant six. At first I was thinking of a six pack but I figured that would be over kill, and it wouldn't help economy over a Holley 390 CFM. If I made a manifold out of sheet metal, I could have three Holley 1920's with the center as the primary and at 50-75% throttle the outer two carbs would kick in as secondaries. The CFM ratings show benitfits.

Holley 1920: 131 CFM @ 1.5 H.G. (That would be the primary carb.)

Holley 390 CFM: 195 CFM @ 1.5 H.G. (For the Primary.)

Holley 1920: 393 CFM @1.5 H.G. @WOT (131 X three carbs.)

Holley 390 CFM: 390 CFM @1.5 H.G. @WOT (195 Primary + 195 Secondary.)

So as you can see, a Holley 1920 flows 64 CFM less then the Holley 390 CFM carb (in other words, better fuel economy at cruising speeds). And when a WOT, the three Holley 1920's flow 3 CFM better than the Holley 390 CFM at WOT (big deal). It looks good on paper, but as we all know what looks good on paper doesn't always do good when it's no longer on paper.

What do y'all think, is it a good Idea or what? Forgot to mention the Slant Six in question belongs to a 1970 Dodge Dart Swinger that is a daily driver. I know that a bang for the buck mod would be some Head work, and I also know that carbeuration and exhaust mods don't do much for a stock engine. I'm looking into some extensive head work or the Doctor's aftermarket head if he finds a way to make it happen by the time I have the money. I'm just looking for something cheaper to give my performance addiction a fix while I save up.

I forgot to mention, I've been drawing very amatuer, crude pictures of the intake (I'm 16, so it's supposed to be crude and amatuer). I'm gonna hook up the scanner tommorrow and post the picture.

Dartman you are way cool! 16 and engineering up a storm! Keep up the ceative ideas. Also and more importantly do your research. Check out the articles section on the forum. I wish I was thinkin' the same when I was 16. What are your education plans?

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66 Lil' Red Piggie Valiant (Mater Crusher) - Thanks Zilla!!!!! 72 Demon (Number 1 Son's)

Sounds like fun. I know the "sixpack " idea is an "old" one. They used 3 Duece Webbers. This was like having 1 bbl for each cylinder. We have also seen 6 snowmobile carbs on a homemade intake.
Frank

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Scrapple: Because a mind is a terrible thing to waste.
73 Duster - Race Car
66 Dart Wagon - DD
178" FED
82 D150
All Slant powered

Haha, Well I've got two career choices that I'm torn between. I'd really like to be a mechanic (automotive class is a blast! ) but at the same time I'd like to Major Tuba and Minor Percussion and be a band director. The thing that holds me back from an automotive career is the fact that these day's things are packed so tight under the hood, its amazing. The problem with the musical route is that N.C.'s economy sucks right now and band directors are not in demand at all. One thing that helps my enginuity is the fact that I take Humanities classes (classes for those that are smarter than Honors class kids), the other benitfit to those classes is the fact that they look darn good on a college application. Luckily I'm a sophomore so I still have a little time left to choose my calling, I'd like to do both but that's $$$ that neither me or my parents have. My band director told me that lenoir ryne College would pay $30,000 in scholarships if I played tuba for them . And then after that I could use grants and scholarships to continue my education in Automotive. I just have to see how the future unfolds. I know one thing for sure, I'm not saving money for college. I'd much rather restore my 70' Dart Swinger :d . I've done plenty of research, in fact I learned almost 75% of my knowledge on how engines work just by reading miscellaneous internet articles and by reading mopar magazines. I've learned about 20% of the rest of the knowledge from my old man (a fellow mopar nut) and the remaining 5% was things I didn't already know by the time I took Auto. Tech. 1. But of course, there's always more research to do right? I thank my Dad for planting the mopar seed when he bought the Dart in '03. When I was in 4th grade (age 10 I think) he promised it to me as a high school graduation gift, so he'll be a little bit sad to see me graduate . He's also owned a 1965 Ford Falcon (170 inline 6, 3-speed manual on the tree) since '99 or 2000, so I've had a taste in classics for awhile now. And by the way, I drive the Dart to school/work everyday. The car makes me a chick magnet (and unfortunatly a guy magnet too )

X2 Very impressive.

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I'd really like to see the doctor chime in on this one now, seeing as I'm getting positive feedback.

Read this thread:

http://www.slantsix.org/forum/viewtopic ... 195#200195

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

The problem with that is that I'm not using individual carbs for individual cylinders. I'm using a primary/secondary setup. Or does it not matter?

I think it's a wicked idea. Carburetor wise, its a bit much for a stock engine. My math:
(225 x4000 rpm) / 3456=~260 cfm.
(Yes, I am aware there are naked numbers)
That 260cfm is how much air your car would need at 4000 rpm, if it were 100% efficient. But realistically, its closer to 60-70% efficient. Well, that's where I gauge my efficiency for my carburetor needs. The biggest bitch would be mounting it to the head. Probably wanna start with making a flange and going from there.

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What's that fuzzy blue thing being hurled this way?
::stick::
BOOSH!!!

I bet you could do this with a stock intake manifold.

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What's that fuzzy blue thing being hurled this way?
::stick::
BOOSH!!!

I like your 3 carb idea. I have thought about it a few times, but time and money always get in the way.

On a side note, turning wrenches is a fun hobby, a really fun hobby, BUT doing it for the general public, every day, is no way to make a living. I have been doing it for 23 years, made several attempts to get out but always fell back in. What other profession do you get to spend 25% of your take home pay just to stay current?


Good luck, and lets see some pics when them 3 carbs are up and running.

TopHat

HVAC/SheetMetalWork(if your employer or Union doesn't splurge)
Computer Repair (if your company doesn't pick up the tab on certs or you are a "consultant")
Electronics
Engineering
Pharmacy





-D.idiot

The reason I pointed out that thread was for airflow requirements.

Just something to keep in the back of your head...........

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

DO NOT give up! Back in the early 60's Offenhauser made a bolt on (over the cast one piece intake/head) 3 holly carb progressive linkage intake manifold. That was for the 144 & 170 cu in motors and it worked quite well.

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Part of Tyrde-Browne Racing