Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
03-30-2021, 08:19 AM | #1 |
Registered User
Join Date: Jul 2015
Location: South Orange County CA
Posts: 1,265
|
Quadrajet on a 292 straight-6 ?
These Quadrajets are pretty easy to find and work on; wondering if anyone has ran one of these on a 292? Quadrajets can range anywhere in between 600 and 800 CFM, just not sure how to identify these.
__________________
1963 C20, small window, long bed 292, 4-speed |
03-30-2021, 09:43 AM | #2 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,657
|
Re: Quadrajet on a 292 straight-6 ?
Quadrajets are 750 or 800 cfm.
Easiest visual clue to difference is the fuel inlet. 800 cfm carb the fuel inlet was straight in from the front, 750 was from the passenger side. The 750 should work well. Pontiac used one on their sohc 250. Easy to adjust secondary air door to control any bogging. |
03-30-2021, 12:49 PM | #3 |
Senior Member
Join Date: Jan 2018
Location: Hickory Flat, GA
Posts: 4,475
|
Re: Quadrajet on a 292 straight-6 ?
I haven't ran one on a 292, but I love the one on my 283. I get better gas mileage with it as well (if I don't rev it out all the time )
I don't know of anyone making a spread bore intake manifold for the 194-292 straight 6 family. You could easily add an adapter to a square bore intake though. The other tricky thing would be the throttle linkage. I would think that the carb mounted with the front pointed towards the passenger side would be the best way to get full distribution of air and fuel when on the primaries and also the secondaries. That would be a complicated mechanical throttle linkage setup, or you could convert to a cable style pedal. I converted my pedal when I swapped to the Q jet. I used a squarebody pedal, but the 71-72 c10 pedal fits better with the contour of the firewall. The cable can make that 90* turn a lot easier than mechanical linkage can
__________________
Christian Carpenter 1963 C10 - Frankentruck 283, Muncie 3 speed with overdrive Overdrive wiring here1963-ish truck bed trailer - Half-Wit 1981 C10 - Penny 305, th350 --> Soon to be 350, Saginaw 4 speed 1995 Dodge Dakota Sport "I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson |
04-01-2021, 02:46 PM | #4 |
Registered User
Join Date: Oct 2015
Location: Williamston, Mi
Posts: 884
|
Re: Quadrajet on a 292 straight-6 ?
I'll currently working on installing a Holley on mine, but have decided to turn it to face the front of the truck. It is a 550 CFM, the primaries are quite smaller then the secondaries. I also just removed a complete gas pedal assembly with cable from a 70's Cadillac to install in my truck. It will be interesting as to how it all plays out. here's a picture of it.
|
04-01-2021, 02:52 PM | #5 | |
Registered User
Join Date: Jul 2015
Location: South Orange County CA
Posts: 1,265
|
Re: Quadrajet on a 292 straight-6 ?
Quote:
__________________
1963 C20, small window, long bed 292, 4-speed |
|
04-01-2021, 03:02 PM | #6 |
Registered User
Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,350
|
Re: Quadrajet on a 292 straight-6 ?
If you do carry this Q-Jet deal through on your in line, I'd advise you to contact Cliff for parts and assistance. The smaller engines CAN use a Q-Jet but may take some tuning time...
|
04-01-2021, 03:10 PM | #7 | |
Registered User
Join Date: Jul 2015
Location: South Orange County CA
Posts: 1,265
|
Re: Quadrajet on a 292 straight-6 ?
Quote:
I heard so many have been successful with the 1bbl; guys say it just pulls like a freight train. It should still run better with the carb I have, just gotta figure out why it's so sluggish, but, that's another thread.
__________________
1963 C20, small window, long bed 292, 4-speed |
|
04-04-2021, 05:42 PM | #8 |
Senior Member
Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,321
|
Re: Quadrajet on a 292 straight-6 ?
GM of Brazil used to make a stock cast iron intake to mate a Q-Jet on an L6. They sell pure cane alcohol there as auto fuel. It takes a higher alcohol/air mixture to get the same caloric value as a gasoline/air mixture. So a 750 CFM alcohol carb would be needed where a 390 CFM gas carburetor works.
Only seen the pictures. Don't know any Brazilians. I'd rather drink it as Rum, than burn it.
__________________
Every 25 years I like to rebuild that 292, whether it needs it or not. |
04-07-2021, 09:13 PM | #9 | |||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,947
|
Re: Quadrajet on a 292 straight-6 ?
Quote:
Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
Quote:
|
|||
04-07-2021, 10:56 PM | #10 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,657
|
Re: Quadrajet on a 292 straight-6 ?
That’s true but 800’s had only straight in line.
Easy way to know at a glance. |
04-08-2021, 06:44 AM | #11 |
Registered User
Join Date: Feb 2007
Location: Memphis MI
Posts: 1,851
|
Re: Quadrajet on a 292 straight-6 ?
Look for one off a 4.3 V6. Block out the computer solenoid and go.
__________________
1987 2 ton 1982 250/TH350 beater in progress Dad's 1981 3/4 L6 3 on tree posi and no options, awaiting restoration or scrapping Plus a mess o' tractors |
04-13-2021, 07:09 PM | #12 | |
Registered User
Join Date: Oct 2005
Location: North Idaho
Posts: 335
|
Re: Quadrajet on a 292 straight-6 ?
Quote:
BOPC engines could have either a 750cfm or 800cfm Qjet, just as on all small or big block squarebody truck engines. The only defining characteristic of 800 vs 750 quadrajet is the diameter of the outer primary venturi ring which is a mere 4/32 of an inch larger. Fortunately, this very slight difference is reflected as a small bump visible in the outer ring. Staring carefully down the primaries with the choke flap open can reveal the secret. See the attached photo.
__________________
1980 K10 Suburban Silverado, original 350 w/Qjet swapped to 406sb, TH350C swapped to TH400/205 |
|
04-14-2021, 12:10 AM | #13 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,657
|
Re: Quadrajet on a 292 straight-6 ?
Not false!
Incomplete maybe. He was looking for a way to know what the carb is. I give him a couple visual clues. I guess I coulda included the Venturi difference but it’s likely he and a hundred more people on here couldn’t tell you with a look inside which is which. You can, I can. Most can’t. Sometimes you need to answer the question and not get too deep. That just confuses everybody. So with that said I apologise for leaving some things out. |
Bookmarks |
|
|