On the list of to do things for the upcoming winter, Id like to replace the 800 CFM Edelhozer with a Rochester 800 CFM Q jet that came with the junk motor I rebuilt. This guy sat for about 15 years yet is absolutely free moving and doesnt appear in too bad a shape to rebuild. It ran well enough to spin 4 rod bearings and wipe out 2 mains LOL... Is it worth it being a 1976 Pontiac 455 (automatic) smog carb? Ill be running it on my '64 special with a fresh 465 CI (+.040") , 4 speed, HEI and decent hydraulic cammed engine. It has a front facing fuel inlet but whats the upside down funnel shaped thing on the top. I havent delved into it yet, just periodically soaking it in the parts washer. Thoughts or ideas? Have a like new (maybe 300 miles) E-brock with a jet kit and some misc. parts Id like to trade for an early 800 Q jet as well. Thanks, Feel free to PM me with details as well. ws Just a few unknowns shown below: A. Screened vent behind primaries B. Funnel shaped casting C. Fume vent into air cleaner? D. Weird casting next to accelerator pump.
I know I’m going take fire but I run an 800 edlebrook on my 70 gs and I love it. My mildly built 455 goes like the hammers of hell with it. I never could get a Rochester to perform as well as the edlebrock does. I’d give the edlebrock a try. You can always have one of the rocky gurus on this forum work their magic on the 50 yo rock if the edlebrock doesn’t work for you
Keep your Edelbrock AFB clone and sell it on Ebay. The only good sound those carbs make here is when I "tink" them off the dumpster!....LOL I'll trade a complete 71-74 Buick 455 "800" cfm carb for the Q-jet. I'll even throw in a rebuild kit with it. PM me if interested.........Cliff
there ya go - do the cliff deal , keep the edelbrock , do some comparison "testing" , see if the edelbrock leaves a bad taste in your mouth . I've got 3 800's done I'm planning on doing that with - hopefully soon in the future . you got a part# for your edelbrock ?
Those 800 CFM Pontiac Q-Jets are some of the more sought-after castings out there. Getting it rebuilt correctly will allow it to smoke the Elderbork carb. I'd definitely get it cleaned up and mounted on that 455 asap.
The 76-80 Buick/Old's are actually equally as good if not better than the Pontiac's because there is not huge front vent to deal with. If you are looking for a later model Q-jet that will convert to E-choke. I'm only wanting the 77 Pontiac because I do a LOT of later Q-jets for T/A's and many of those owners don't have cores because somewhere along the way some really miss-informed folks thought a Holley or Edelbrock was a better way to go. As far as "how good are the 1971-74 Buick 455 Q-jets", ask the folks I've done them for running in Pure Stock and FAST?.........Cliff
I kinda like the idea of an adjustable part throttle (APT) access in the air horn. How does the non ponch APT come into play? Doesnt that one require some disassembly to adjust or alter? I do agree about that big vent in the top as one of my concerns is indeed a lower profile for hood clearances. And being "sought after" is an understatement. Ill hafta take a closer peek at it... It was packed in grunge when I got it, but operates freely. Heres some pics of the E-broke numbers if yer interested... ws
Not here to add to the replies about the carbs, but Bill, the picture of your engine bay with the stock air cleaner installed and all painted up looks really nice! Looks like you might have hood clearance too.
