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I have a 1966 F85 with a 2bbl 330, that I知 going to convert to 4bbl. For the sake of originality I値l use a Rochester Quadrajet, and hide an Edelbrock intake by painting it bronze. What I知 hung up on is the how the choke will work. The Edelbrock intakes that I知 looking at (specifically the 2711) don稚 appear to have any port for choke. Is there an aftermarket intake that will accept the OEM carb, or should I take a different approach and get a Quadrajet with electric choke so that I can use the Edelbrock 2711?
I have a 1966 F85 with a 2bbl 330, that I知 going to convert to 4bbl. For the sake of originality I値l use a Rochester Quadrajet, and hide an Edelbrock intake by painting it bronze. What I知 hung up on is the how the choke will work. The Edelbrock intakes that I知 looking at (specifically the 2711) don稚 appear to have any port for choke. Is there an aftermarket intake that will accept the OEM carb, or should I take a different approach and get a Quadrajet with electric choke so that I can use the Edelbrock 2711?
Thanks!
Erich
The aftermarket intakes are only configured for carbs with integral chokes. That would be 1970-newer for Oldsmobile. You'll need a carb of that vintage with the round choke housing and you'll either need an aftermarket hot air stove to operate the choke or convert it to electric.
As Joe posted, there's no need to get a different carb, just get an electric choke coil to replace the hot air choke coil on the carb you have.
If he has the correct carb for a 1966 Olds, it doesn't have a hot air choke, it has a divorced choke that sits in the pocket on the intake, which is what he's asking about. That's why I told him that he needs a 1970-newer carb, back in post #2.
I don't have a carb for it yet. So I've got a blank slate, I can seek out any carb you recommend. I've been pouring over pictures and the two quadrajets I have (one on a '75 camaro and the other for a '72 corvette) to better understand the different choke systems and differences between choke and throttle linkages. Looking at an OE replacement for a 1970, (Autoline 9200, 4MV) it looks like the fuel inlet points forward instead of passenger side (no problem), and the throttle rod might attach differently. Other than that, I don't see and problems with using this one... right?
Most people don't realize that the Qjets used by Oldsmobile in 1966 and 67 used a side fuel inlet like the Chevy carbs, not the front inlet seen on every 1968-1990 Olds Qjet. Unfortunately those 66-67 carbs have the divorced choke that won't work with your intake. What you really want is a 7040250, 7041250, or 7042250 carb, which are from 1970-72 Olds 350 motors, respectively. Those three carbs are all close in jetting and will be fine on your 330. Unfortunately, Olds changed from the rod style throttle linkage used in 1967-earlier to the cable style linkage used 1968-up. The throttle arm on the carb will be different as a result and adapting one will require some minor fabrication. Once you have a carb with an integral choke, you can simply buy an electrically heated choke coil like Standard Motor Products CV329, swap it for the hot air coil on the carb, and wire it as shown in this thread.
Awesome help Joe, thank you. This is everything I need to know to proceed with confidence.
I hate that there's essentially no scenario in which I can return the favor by having Oldsmobile knowledge that you need. Can you ask something about a 1997 Crown Victoria so I can feel helpful?
I have a 1966 F85 with a 2bbl 330, that I知 going to convert to 4bbl. For the sake of originality I値l use a Rochester Quadrajet, and hide an Edelbrock intake
Erich if your are looking for a performance bump you may want to get a more aggressive cam, in addition.
I had a 67 Cutlass 9.0 compression 330 2bbl 3 speed on the column, 3.08 rear. Eventually converted to a Holley 4bbl 600cfm and Edelbrock intake, with dual exhaust. Further down the road went to headers and lastly a Super T 10 4 speed.
The car felt quicker and more responsive bone stock. I was essentially the 2nd owner and got the car with under 50,000 miles. It was then 20 years old and in great shape mechanically and body wise, rock solid. In my opinion the factory matched its cam and setup perfectly with little to no room for improvement as is. After all those mods, the car sounded great but the healthy edge it had stock was gone. The factory 4bbl version came with a superior cam as far as i can tell and that was likely the missing piece to my puzzle.
I'm glad you posted. I never considered that there was a difference in cam between 2bbl and 4bbl engines, and never would have gone looking if you hadn't brought this up. I'd always been skeptical about the 60hp difference in the 1966 factory rating of the low compression 2bbl at 250hp and the 4bbl at 310hp. No way the carb and intake can make that difference alone, and the cam explains it all perfectly. Indeed, the service manual shows a 2bbl cam, a 4bbl manual transmission cam, and a 4bbl automatic transmission cam.
I'm sure in time I'll install the proper cam... but I can't decide if I'll do it right away. My goal is reliable driveability rather than performance, and I have other car projects that need my attention more than this. I'm thinking I'll install the intake and carb and drive it for a while. Then when I go to install and break in a new cam I'll know that I have a carb that's already completely tuned and ready.
February 18th, 2020, 04:52 PM
