2 Barrel to 4 Barrel

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10-31-2008, 09:44 AM

skymynx

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2 Barrel to 4 Barrel

So i've decided to switch to a 4 barrel carb on my 318. As some of you may know I'm having fuel problems with the current 2 barrel setup on the car. Decided to go with the holley 670 cfm street avenger carb. Any suggestions as to which intake manifold to go with? I was thinking about going with an Edelbrock RPM manifold. Also any suggestions i should know about switching from 2 barrel to a 4 barrel setup that i may have not thought of would be appreciated.

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10-31-2008, 11:53 AM

Jarettb

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I always like a the Holly Dominator however for your application the RPM would not be a bad choice at all.

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10-31-2008, 01:18 PM

BuckNeccid

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You MAY have to get another passing gear linkage rod to get the correct operation of your tranny. I'm not sure enough of the small block to say for sure.

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10-31-2008, 01:24 PM

skymynx

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I already talked to holley themself and they told me exactly what i needed in order to keep the tranny operating just like it should

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10-31-2008, 04:38 PM

78D200

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i went with a holley 4160 600 CFM carb on a Weiand Action+ Plus intake. idle to 6800 RPM, if you can find a cam to match it close you'll be golden.

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11-03-2008, 09:39 AM

skymynx

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i have been looking at that weiand manifold as well. it will prolly be better for me. when im all done with the motor i want to have about 350-400 hp that way my girlfriend still feels comfertable driving it herself.

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11-03-2008, 04:13 PM

ef8340

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i like 78's idea with the weiland/cam i'd also get some 85-87 yr 318 heads too while your changin the intake and stuff the one's you want came on the cop cars [diplomat,grand furys, etc,etc] and i think they also came on others these would work well for yours im not exactly sure but i think the last 3 casting no. are 308, you could check with challenger i think he knows a sight on the net that would give you the exact numbers or get the edelbrock aluminum heads

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11-04-2008, 02:29 PM

skymynx

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i went and ordered the weiand action plus intake manifold. will go with the edelbrock aluminum heads at some point when i rebuild the motor.

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11-05-2008, 09:31 AM

skymynx

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so heres exactly what i went with

670 CFM Street Avenger
Weiand Action plus intake manifold
20-7 holley carb linkage
mopar performance water neck

one last quick question. the intake manifold gasket should be the same exact as the regular stock intake manifold gasket correct me if im wrong. but it shouldn't matter if its a 2 barrel or 4 barrel intake manifold.

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11-05-2008, 10:54 AM

#10

frankyb

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I would consider the Edlebrock Performer and Edlebrock intake.
The Eddy combo provides excellent performance, reliability and gas milage. Very easy to work on too.

The Holly may sqeak a bit more performance but your mileage will suffer considerably and you'll be constantly messing with it.

With the 318 and 360's I say Edlebrock.

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11-12-2008, 09:55 AM

#11

skymynx

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so got the intake manifold in. question for you 78 since you have the same manifold. do the last coolent ports (ones near firewall) on the head get blocked off by the intake manifold on yours as well.

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