dual two barrel carbs
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Junior User
Joined: Jun 2006
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From: Petal Miss.
dual two barrel carbs
Has anyone ever used these setups on there engine?
I was looking at the dual two barrel carbs on a four barrel intake manifold adapter.
This would go on my clifford intake manifold.
Vintage speed web site sells the whole setup.
What do you think?
It will go on a 300 6 cylinder.
I was looking at the dual two barrel carbs on a four barrel intake manifold adapter.
This would go on my clifford intake manifold.
Vintage speed web site sells the whole setup.
What do you think?
It will go on a 300 6 cylinder.
Last edited by vincenthp; Aug 19, 2009 at 02:12 AM. Reason: more info
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From: Boise, Idaho
Most websites will advertise plug and play. I've spent many hours and $$ buying and tuning different jets to tune a "plug and play" Holley carb. The only way it is, is if they advertise that it's for a 300 I6.
That aside, it would definitely be different and a very cool setup to have on your engine! If you tuned it right, it'd be a lot of fun.
That aside, it would definitely be different and a very cool setup to have on your engine! If you tuned it right, it'd be a lot of fun.
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Lead Driver
Joined: Mar 2008
Posts: 7,182
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From: Near Los Angeles
Of course there is the linkage to consider.
Not only do you need to connect it to yours, but is it progressive, or do both carbs operate simultaneously?
Either way, excluding the coolness, I think it would be much easier and cheaper to go with a 4v.
Some guys on the forum are using 600 cfm carbs and larger with nearly stock engines, and say the difference in power is amazing.
Not only do you need to connect it to yours, but is it progressive, or do both carbs operate simultaneously?
Either way, excluding the coolness, I think it would be much easier and cheaper to go with a 4v.
Some guys on the forum are using 600 cfm carbs and larger with nearly stock engines, and say the difference in power is amazing.
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Old School Hot Rodder
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From: Exmore, VA
Believe it or not, one of the best 4 bbl carbs for fuel economy is the Quadrajet. It's small primaries and large secondaries give good throttle response and plenty of power. The secret to using a 4 bbl on an in-line engine is the put the primaries outboard with the throttle shaft parellel to the crank. If you have ever seen a Pontiac Sprint 6 you know what I am describing. Use a pre-emission, or no later than 69-70 Quadrajet. Unfortunately, only the 66 Buick Riviera 425 used an integral choke until much newer. If you use one from a Chevrolet, there is a small baffle around one of the secondary nozzles. You will need to remove it, it is there to correct a fule distrution issue at WOT on the Chevrolet manifold and will cause a lean condition on some cylinders.
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Junior User
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From: Petal Miss.
Its funny you should mention a quadrajet. I have one setup to go
http://profile.imageshack.us/user/fu...99/img3757.jpg
I was thinking of going that route originally. It came off of a 1968 impala with a 327
http://profile.imageshack.us/user/fu...2/img3754s.jpg
I was not sure if i would be able to tune the secondaries properly.
I was also going to add a heavy duty exhaust manifold as soon as I can come up with an idea on how to cap the top of the manifold off.
does anyone have any suggestions.
Vincent
http://profile.imageshack.us/user/fu...7/img3758i.jpg
http://profile.imageshack.us/user/fu...99/img3757.jpg
I was thinking of going that route originally. It came off of a 1968 impala with a 327
http://profile.imageshack.us/user/fu...2/img3754s.jpg
I was not sure if i would be able to tune the secondaries properly.
I was also going to add a heavy duty exhaust manifold as soon as I can come up with an idea on how to cap the top of the manifold off.
does anyone have any suggestions.
Vincent
http://profile.imageshack.us/user/fu...7/img3758i.jpg
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Joined: Dec 2007
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From: Boise, Idaho
Shouldn't be too difficult. Get some high temp gasket maker that can be used on manifolds (buy it by the roll, not very $$), and lay it over the opening and trace it. Then, go buy a piece of plate steel about 1/4" thick, lay the gasket over the top, mark your holes, and drill through.
Find some bolts that match and tighten the plate down with the gasket in between.
Probably $10 - $15 and a half hour of time minus collecting supplies.
Find some bolts that match and tighten the plate down with the gasket in between.
Probably $10 - $15 and a half hour of time minus collecting supplies.
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Junior User
Joined: Jun 2006
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From: Petal Miss.
With the coolant passage under the intake i am not sure if a half inch plate will fit.
I have halfway mocked it up to see how everything would go together.
There does not look to be even a half inch of room between the two manifolds.
Could I go with a thinner steel plate?
Has anyone tried this before on this type of intake/exhaust manifold before?
Thank you for all your input.
Vincent
I have halfway mocked it up to see how everything would go together.
There does not look to be even a half inch of room between the two manifolds.
Could I go with a thinner steel plate?
Has anyone tried this before on this type of intake/exhaust manifold before?
Thank you for all your input.
Vincent
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Joined: Dec 2007
Posts: 7,987
Likes: 104
From: Boise, Idaho
That's a good point, if there isn't enough clearance. Even if you got thinner steel, the bolt heads might still be pushing up against the intake. Too thin, and the plate could warp under heat.
Could you simply have the hole welded shut?
Could you simply have the hole welded shut?