I found an Offy dual port 4-bbl aluminum manifold locally by chance today. Supposedly for a 2L Pinto. Is this a good piece? I am interested in building an efficient and powerful little 2.3 for my 76. I had planned on a Holley 350 2bbl, but a 390 4bbl isn't much bigger. My plans were to go with all the engine mods except big carb and big cam, so as to not destroy my mileage. Would a 390 kill my mileage? or might it be just enough with the rest ov the combo (aftermarket headers, full HP exhaust, cold air, Ranger roller cam, 10:1 CR, HP ignition, etc.)..??.?
Or is this not a good design for a manifold? All i know about Offy is that they dont make good Mopar manifolds. This one locally is gonna be less than $100 though, and apparently in near-new shape.
Would this be a good choice for my goals? The weight-reduction alone is tempting....
Quote from: Pale Roader on August 16, 2009, 09:34:52 AM
I found an Offy dual port 4-bbl aluminum manifold locally by chance today. Supposedly for a 2L Pinto. Is this a good piece? I am interested in building an efficient and powerful little 2.3 for my 76.
2.0 manifold won't fit a 2.3
I have a offy manifold for my 2.3 and it has turned out a pretty good piece after i made some mods to it. T ods are shown in my project build up project Shurtagul
Quote from: 71pintoracer on August 16, 2009, 11:02:42 AM
2.0 manifold won't fit a 2.3
WHUT!
Way to ruin my Christmas...
Sorry 'bout that, but look at the bright side, at least you didn't shell out the hundred bucks and then find out it wouldn't fit!! :P
For some unknown reason, the 4bbl intakes for 2.3's are harder to find. For your engine combo the 350 or the 390 will work great. I ran both on my 2.0, couldn't tell any difference in either one. I used a stock ported intake with an adapter with the 350, a Weiand intake (and the nitrous plate) with the 390. They say the 390 actually works better because the primaries are small so you get better fuel mileage. I could never keep my foot out of it to see if that was true! :lol: Driveability was great with both.
Another option is to use the lower EFI intake from a Ranger with an adapter from Walsh. :fastcar: :)
Quote from: 71pintoracer on August 16, 2009, 09:42:43 PM
Sorry 'bout that, but look at the bright side, at least you didn't shell out the hundred bucks and then find out it wouldn't fit!! :P
For some unknown reason, the 4bbl intakes for 2.3's are harder to find. For your engine combo the 350 or the 390 will work great. I ran both on my 2.0, couldn't tell any difference in either one. I used a stock ported intake with an adapter with the 350, a Weiand intake (and the nitrous plate) with the 390. They say the 390 actually works better because the primaries are small so you get better fuel mileage. I could never keep my foot out of it to see if that was true! :lol: Driveability was great with both.
Another option is to use the lower EFI intake from a Ranger with an adapter from Walsh. :fastcar: :)
Well then, if anyone else is interested, theres one in the Vancouver Craigslist...
I would have assumed that the slightly larger 4bbl would be more efficient too, by the same reasoning that a Holley 650 gets better mileage than a 500ish 2bbl (when you stay out ov the secondaries). I wonder how much throttle you get out ov those tiny primaries though...
I'd just like something better than stock, and a weight savings would be nice as well. Those Ranger intakes aluminum...?? ?
I use a 450cfm 4 blr on mine. It is the carb that is used on tunnel rams when they are in pairs. It has progressive linkage for the back two barrels. The only draw back to it is there is no choke. I don't have any issues with starting just a quick pump of the pedal and it starts right up. When warmed up very responsive and if I have been driving it and turn it off to say going into a store, when i come back out i just hit the key and it starts just like EFI.
jim