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06-07-2004, 05:26 PM
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#1 |
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Registered User
 Join Date: Jan 2001
Location: Sabinal, Texas
Posts: 1,706
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later year q'jets any good?
I am thinking of getting a pre-electronic q'jet (1980) from a 454 and trying it on my 402. Are these any better than the earlier years' ones? Are these the 800 CFM (1 7/32" primary bores) ones?
Thanx |
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06-07-2004, 05:41 PM
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#2 |
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Senior Member
Join Date: Mar 2000
Location: Saskatoon,SK,Canada
Posts: 2,476
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I am running a 79 small block unit on my 350 and it is great. The latest non electronic q-jets are the most refined, have electric chokes, can be tuned for the best economy and the best drivability.
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Saskatoon, Saskatchewan Canada |
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06-07-2004, 08:18 PM
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#3 |
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Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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We have an electric choke model Q-jet on my son's truck. It is a 79 or 80 and it works really well. The choke is never an issue.
Jim |
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06-07-2004, 08:56 PM
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#4 |
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Registered User
Join Date: Apr 2004
Location: Grant, Alabama
Posts: 504
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The biggest difference between the older and newer Q jets is that the newer ones are jetted/set up for less emmisions. The older ones also have more fuelk capacity in the bowl but the newer ones can be made to hold more by taking out the black plastic peice(round and hollow) from the float bowl and get a lot of it back. The newer carb will have a lot more vacuum lines to plug off to but thats no big deal.
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72 Chevy C20, SOLD (Dang it.) 09 Challanger RT six speed in all black. 74 Datsun 710 wagon, all 1.8 liters of screaming Datsun power. 73 C10 long bed, 350/350 combo, nice shape. |
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06-07-2004, 09:52 PM
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#5 |
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hmm...
Join Date: Jan 2004
Location: Culver, Indiana
Posts: 1,631
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800 CFM carbs came on (I think) 454's exclusively later on. Chances are, if you find a qjet, it'll be 750 CFM which is more than enough for everything but the hairiest of 402's. on super duty pontiacs and certain chevies (I can't remember which ones). A quick way to tell if you have a 750 or 800 CFM qjet is that the primary venturies will be 1-2/32 inches on the 750 and 1-7/32 on the 800
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1983 Oldsmobile Delta 88 1967 Chevy C-10 stripper www.fcrperformance.com - wanna go...faster? talk to FCR. |
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06-07-2004, 10:42 PM
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#6 |
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Registered User
Join Date: Feb 2002
Location: Vacaville, CA
Posts: 2,745
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I have a couple of 800CFM Q-Jets that I took off of Caddys. They have electric chokes and P\S fuel inlet. I am going to rework them and put one on the truck the other on the Burb. Somewhere I have a pic looking down the primaries that shows the difference between the 750's and 800's, I just can't seem to find it right now.
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 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI |
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06-07-2004, 11:00 PM
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#7 |
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Account Suspended
Join Date: Dec 2003
Location: Texas
Posts: 2,686
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My 85 Came with a non electronic Q-Jet it works great compared to older ones i have had Push the pedal once in the morning so the choke flap will close and it starts right up idles high untill its warm PERFECT> and better gas mileage than the edelbrock i tryed.
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06-08-2004, 04:27 AM
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#8 |
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Registered User
Join Date: Jan 2001
Location: Sabinal, Texas
Posts: 1,706
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Well then I guess I have nuthin' to lose. I tried an E'brock (AFB) carb once. Big POS! The rebuilds I am not wild about, E'brock Q'jet carbs are too x-pensive, a Holley is out of the question an a Jet might be good but still over 3 hundred bones!
I'll give it a whirl. Thanx for the replies! |
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