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| two-barrel vs. dual one-barrel https://www.slantsix.org/forum/viewtopic.php?t=15901 |
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| Author: | Dave [ Wed Jan 25, 2006 9:46 am ] |
| Post subject: | two-barrel vs. dual one-barrel |
I am rodding my '82 D-150 225. Hooker headers, shaved head, Clifford cam, now turning my attention to intake. All else being equal, what is the theoretical difference in performance between, say, a Holley 2-barrel on a Mopar intake manifold and an Offy dual 1-barrel setup? The goal is lots of torque. Thanks, Dave |
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| Author: | Reed [ Wed Jan 25, 2006 10:10 am ] |
| Post subject: | |
Well, from what i understand about throttle bore dimensions, port velocity, and low end torque (which is not very much), if it were me I would go for the Offy dual one barrel intake and run a Carter BBS or the large bore Holley 1920 carbs. Better fuel distribution too on the Offy. |
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| Author: | dakight [ Wed Jan 25, 2006 5:05 pm ] |
| Post subject: | |
I've been looking at those myself and may know where I can pick one up when I'm ready in a few months. My only concern is how to hook up the choke linkage. I'm sure a manual choke could be rigged up but I'd rather have the automatic choke and I'm not anxious to tolerate the cold driveablility problems of a chokeless engine on a street car. It looks like the choke pocket is cast into the intake but as far as I can see it would only operate on one carb... is that sufficient? Bear in mind, I've never actually seen one installed so I'm just going by what I can see in pictures. |
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| Author: | SlantSixDan [ Wed Jan 25, 2006 5:44 pm ] |
| Post subject: | |
Quote: I've been looking at those myself and may know where I can pick one up when I'm ready in a few months. My only concern is how to hook up the choke linkage.
See Here and Here.
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| Author: | dakight [ Thu Jan 26, 2006 4:38 am ] |
| Post subject: | |
Quote:
Cool! I've saved those links for future reference. I was tryin to picture in my mind (such as it is) some kind of bell crank linkage but this is certainly simpler. I may have more questions about the electrics if and when I decide to acquire the manifold.
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| Author: | NewLancerMan [ Thu Jan 26, 2006 8:59 pm ] |
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i've also seen the choke pocket relocated to line up with the rear carb (DD did that) on 63Dart's car. I don't run a choke at the moment, and haven't had too much trouble. Once I get my air cleaners straightened out, I'll setup a choke. MJ |
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| Author: | james longhurst [ Fri Jan 27, 2006 9:24 am ] |
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i have used that intake with holley 1945s for a few years with no choke and haven't had any start/idle problems. offy says to use just one choke and it should be fine though. don't early/mid 70s slants use a divorced electric choke? may be another option. -james |
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| Author: | dakight [ Fri Jan 27, 2006 10:57 am ] |
| Post subject: | |
The electric kit looks like a good way to go. It wouldn't be too difficult to fabricate a mounting plate so that it would line up with the rear carb. The MoPar electric choke coils still had to mount down in the choke pocket on the exhaust manifold; it looks to me that fabrication would be much more difficult. |
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