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

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.

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.

_________________
David Kight
'62 Valiant Signet, White
'98 Dodge Dakota
'06 Jeep Liberty

Growing older is unavoidable but growing up is strictly optional.

See Here and Here.

_________________
一期一会
Too many people who were born on third base actually believe they've hit a triple.

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.

_________________
David Kight
'62 Valiant Signet, White
'98 Dodge Dakota
'06 Jeep Liberty

Growing older is unavoidable but growing up is strictly optional.

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

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

_________________

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.

_________________
David Kight
'62 Valiant Signet, White
'98 Dodge Dakota
'06 Jeep Liberty

Growing older is unavoidable but growing up is strictly optional.