Multiple street carbs
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Drifting
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From: Hawaii
Multiple street carbs
I posted this in the C1/C2 section but wanted to get input from our C3 brothers. I am looking at a dual carb setup for my 64 coupe. I'm going to retire the 327 and look for a 383 or a 406. The newest Edelbrock dual quad setup as mentioned in the March edition of Super Chevy looks to be one sweet deal. The quad manifold was made for the Etec vortec style heads and is claimed to run 12 sec ets in a 3500 lb car. Has anyone installed this combo or any other dual quad setup and made it run well? Looking for the bling as well as the zing 
Thanks, Allan
Thanks, Allan
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Drifting
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From: Hawaii
Originally Posted by Kalway
Dual quads on a 383 or 406... You'd use like 2 400cfms wouldn't you?
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The Edelbrock 2x4 setups work very well out of the box. While I'm a Holley guy at heart, there is something sweet about two AFB's sitting together..only way they look right to me is in pairs.
We have a setup on a mild 302" '67 Mustang in a buddy's car. He literally has a rebuilt stock $50 shortblock with cast pistons and a $1000 set of TFS heads on it, a used E303 hyd roller cam, headers, 4 speed and 3.73 gears. He used the 500 cfm carbs. They have worked perfect out of the box and he literally drives it for a work car and on long trips. They don't act up even in Houston heat. I've driven the car numerous times on the street and track and it runs high 12's all night long no matter what we do to it. We like to make "laps" in it!
I'd use at leas the 500's on a 383 or 406. That intake is going to be relatively small and you can use the larger carbs well. I'd look at whatever combo was listed that made peal HP at 4800 rpm and get a different cam or heads to move it up at least to 5500-6000 rpm. That other combo peaks WAY too low, especially for a small block. It won't run as well as you would hope.
JIM
We have a setup on a mild 302" '67 Mustang in a buddy's car. He literally has a rebuilt stock $50 shortblock with cast pistons and a $1000 set of TFS heads on it, a used E303 hyd roller cam, headers, 4 speed and 3.73 gears. He used the 500 cfm carbs. They have worked perfect out of the box and he literally drives it for a work car and on long trips. They don't act up even in Houston heat. I've driven the car numerous times on the street and track and it runs high 12's all night long no matter what we do to it. We like to make "laps" in it!
I'd use at leas the 500's on a 383 or 406. That intake is going to be relatively small and you can use the larger carbs well. I'd look at whatever combo was listed that made peal HP at 4800 rpm and get a different cam or heads to move it up at least to 5500-6000 rpm. That other combo peaks WAY too low, especially for a small block. It won't run as well as you would hope.
JIM
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Drifting
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From: Hawaii
Thanks Jim,
Another mentioned option was to use the 200cc Etecs instead of the 170cc version for higher horsepower production. Unfortunately, there's not much choice in vortec style heads to match Edelbrocks 2X4 vortec intake manifold. I believe your're referring to the Edelbrock C-26 2X4 version for non vortec heads? I've often wondered about the capability of that older design manifold. If that manifold is streetworthy I wouldn't mind using it as it gives me a wider choice of heads.
The Performer cam also seemed a little on the small side but made excellent torque in this test. The cam used spec'd out at 0.420/0.442 intake/exhaust lift; 204/214 duration @ 0.050 on a 110 LSA. Can anyone suggest an appropriate cam to match the larger 200 cc Etec's? I was looking for a streetable 425+ hp and 465+ lb/ft torque which is definitely in the realm of this combo.
Allan
Another mentioned option was to use the 200cc Etecs instead of the 170cc version for higher horsepower production. Unfortunately, there's not much choice in vortec style heads to match Edelbrocks 2X4 vortec intake manifold. I believe your're referring to the Edelbrock C-26 2X4 version for non vortec heads? I've often wondered about the capability of that older design manifold. If that manifold is streetworthy I wouldn't mind using it as it gives me a wider choice of heads.
The Performer cam also seemed a little on the small side but made excellent torque in this test. The cam used spec'd out at 0.420/0.442 intake/exhaust lift; 204/214 duration @ 0.050 on a 110 LSA. Can anyone suggest an appropriate cam to match the larger 200 cc Etec's? I was looking for a streetable 425+ hp and 465+ lb/ft torque which is definitely in the realm of this combo.
Allan
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http://cgi.ebay.com/ebaymotors/NEW-W...QQcmdZViewItem
slap on some ida carbs and you have yourself a nice setup
slap on some ida carbs and you have yourself a nice setup
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I was looking at the Edelbrock dual quad setup, great price, I would have got one if I didn't just get the Race Demon, they have a dual quad Air Gap setup with 2 600CFM carbs, would love to know if this fits under stock hood 
Safety Car
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From: Norwalk Ct
I have the BG six shooter....theres something real cool about multi carb set ups...and the six shooter performs aswell.
I wonder what the factory would have called a 396, aluminum headed, tri power small block........hmmmmmmmmm
I wonder what the factory would have called a 396, aluminum headed, tri power small block........hmmmmmmmmm
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From: FL
The Edelbrock setup is designed for a mild small block, 5500 rpm max. The Performer cam is very mild. Barely warmer than an L-48 cam, less than an L-82 cam.
For 425+HP, you need a cam in the 230@.050" range and it will probably peak in the 6000rpm range with a 383 (maybe 5500 with a 406).
Edit: Found the article I was looking for with specifics. Lots of good info on different multicarb setups:
http://www.hotrod.com/techarticles/60638/index.html
For 425+HP, you need a cam in the 230@.050" range and it will probably peak in the 6000rpm range with a 383 (maybe 5500 with a 406).
Edit: Found the article I was looking for with specifics. Lots of good info on different multicarb setups:
http://www.hotrod.com/techarticles/60638/index.html
Last edited by SteveG75; Dec 1, 2005 at 07:09 PM.
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
My 825 RAce Demon and Vic Jr. intake is probably the best combination I will ever get for my 406ci. But for the bling factor I would consider the 2X4 Edelbrock setup and with 2 x 600cfm =1200cfm and the Air Gap intake it probably would not drop too much power. 
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If you want to use the Etech's, for sure look into the 200 cc ones for a 383/406. You need the airflow for a big motor. For sure you need much more cam. That cam is useless IMHO.
A 200 cc head isn't too big at all. I used some seriously ported ones that were 207cc on a mild 350 and they were killer. Would lug down to 1000 rpm in high gear and pull 7000 rpm anytime you wanted to.
The AFR 195's or 210's are another option. There are tons of choices...don't waste $$$ building a dump truck motor!
JIM
A 200 cc head isn't too big at all. I used some seriously ported ones that were 207cc on a mild 350 and they were killer. Would lug down to 1000 rpm in high gear and pull 7000 rpm anytime you wanted to.
The AFR 195's or 210's are another option. There are tons of choices...don't waste $$$ building a dump truck motor!
JIM
