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Old 04-29-2008, 12:36 PM
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I always wanted dual quads...........

Here's another of my hare brained ideas. Mild 464 Big Block Buick with a 200-4R in a light car built for mostly cruisin'. I have a 430 Buick and just ran across another 430 and a 455, the same guy has an Offy 2 X 4 intake that mounts Holley carbs. As a youngster I always loved the look of dual quads even though I knew a single would work better and even though I'm an old fart now that hasn't changed. With a lot of tuning and progressive linkage I think a pair of 390 Holley's would be fairly streetable on something this large. Anyone out there ever run a similar setup?

I remember riding in a 402 '69 Camaro with dual 600 Holley's on a low rise intake. A different induction system may have worked better but that one worked plenty good! The 4.56 gears probably helped some

This will be a stump puller in a 3200 Lb. car and I'd be doing the quads 110% for visual impact, I know a good Q-Jet on an Edelbrock B4B would work better and get better mileage BUT come on, DUAL QUADS on a Big Block Buick in a Studebaker Coupe! Who couldn't like that?!

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Old 04-29-2008, 02:35 PM
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Quote:
Originally Posted by Hippie
BUT come on, DUAL QUADS on a Big Block Buick in a Studebaker Coupe! Who couldn't like that?!
Biggest question is, will they be sticking out the hood? If so, go for it!
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Old 04-29-2008, 02:39 PM
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Quote:
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Biggest question is, will they be sticking out the hood? If so, go for it!
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Old 04-29-2008, 02:43 PM
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Quote:
Originally Posted by Jmark
Biggest question is, will they be sticking out the hood? If so, go for it!
No, but if I find a spare hood you'll be able to peek through the louvers and see them.
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Old 04-29-2008, 02:50 PM
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Back in the day, a good friend had a 69 Judge, ram air 4, 400 with 3-2's. To save weight, we left the hood off. Pretty cool looking. 5.13's and a 4 speed, it was a real rocket off the line up to about 50! LOL
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Old 04-29-2008, 02:51 PM
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I'd like them better if you made up a mopar type cross ram manifold....

with the shape of the stude hood that would look great peaking out a bit...aka "Big Daddy" Ed Roth stuff...and they work correct that way
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Old 04-29-2008, 03:12 PM
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If I ever get of this computer and get out to the garage i got a tunnel ram project that needs attention. (Like you mostly for the visual impact and grins)
Might even get into a bit of nitrous on it to see if I can split the block in half.
I say go for it. Your small cfm holleys or some AFB carbs should be fine.
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Old 04-29-2008, 03:31 PM
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GO for it.
Nothing like a pair of quad's, 2 extra barrel's for flow.
I run a pair of 650's w/annular booster's on top a cross ram & 434 roller sbc in a 2800# car.
I have a different cross ram i'm repairing /flowing /porting to install on it.

The 390's have vacuum secondaries which would be good for a heavy car/truck, I don't think you would be happy with them.

Mileage depend's on the fast pedal.

What is the LSA of the cam ?
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Old 04-29-2008, 03:39 PM
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I've only run 2x4 once back in 68-9 on a 64 chevelle ss with a 283. It was the stock Vette iron manifold w/small base carbs. Never could get it to transition without a bog. A older friend with some experience tried in vain to get it good.


Multi carb motors need lots of sun to run right.. ... toss the hood
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Old 04-29-2008, 04:28 PM
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Originally Posted by 1BAD80
.

What is the LSA of the cam ?
I'm looking at 2 different cams, one is 110 LSA and the other 112. Both are just a hair bigger than the Stage 1 cam and redline at about 4800. Pretty smooth idle, maybe a slight lope to the 110 cam but they are suppose to work with stock converters and gears in a GS which is several hundred pounds heavier than my Stude. This is going to be geared pretty high and won't have much tire on it so it's probably going to get loose REAL easy. Like I said it's just a "cruiser" but if there was ever an opportunity to have dual quads this is it.
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Old 04-29-2008, 06:16 PM
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I would get (and did on my motor) the 110 LSA.
With the light car & auto trany @a 650 rpm idle I can put the pedal down.
I have no problem with the responce both 4's open all the way.
I ran a 10:80 @ 129.80 with a larger lift cam installed.

Its only as good as the tuner.

Some good articles in the Knowledge Base Engine section on this site.

If you ever need help send me a PM.
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Old 04-29-2008, 06:55 PM
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If you ever need help send me a PM.

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Old 04-29-2008, 10:03 PM
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I say go for it.... I am putting this monstrosity on my 454 in my 34 coupe. Definitely more for looks, and I'll gladly suffer the long warm-ups and slightly worse gas mileage - okay, who am I kidding, this thing will drink gas like it's only $1.50 a gallon.....
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Old 04-30-2008, 03:34 PM
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Go for it. dual quad looks great. Change primary jets to #57 on a Holley 390. I replaced the secondary plates with a pair secondary metering block from a 780 Carb. used #62 jet for the secondary. 390 Holley carb run very lean. The exhaust valve will turn white.
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