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03-06-2007, 10:46 PM
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#1 |
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Sierra Grande Club
Join Date: Jan 2007
Location: New Mexico USA
Posts: 2,433
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Q-jet CFM
I went to the u pull it yard yesterday looking for a q-jet with an electric choke. I was amazed at how many are already gone!
Anyway, is there a way to determine the CFM on these or are they all the same? Is there a desirable car/truck to get one from? Thanks, Dean
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1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe. 
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03-06-2007, 11:21 PM
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#2 |
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Saving 1 truck at a time!
Join Date: Aug 2001
Location: Kent, WA
Posts: 6,465
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Re: Q-jet CFM
750 usually. There were some 850's but they are really rare. Do a Google search and you will find several good Rochester sites that will give you the specs. based upon the number stamped on the side of the carb. The electric chokes are the later models...late '70's-'80's.
They can all be modified for high performance. You got about the best they had to offer since it has an electric choke. Were there any more laying around there?
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'68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary) Last edited by stllookn; 03-06-2007 at 11:23 PM. |
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03-06-2007, 11:46 PM
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#3 |
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Senior Member
Join Date: Oct 2006
Location: Edmonton Alberta
Posts: 458
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Re: Q-jet CFM
usually the u pull it yards pull them when they come in. Swap meets are the best place to find them.
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03-07-2007, 07:36 AM
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#4 |
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Registered User
Join Date: Feb 2002
Location: Vacaville, CA
Posts: 2,745
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Re: Q-jet CFM
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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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03-07-2007, 12:07 PM
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#5 |
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Registered User
 Join Date: Jan 2007
Location: Fairview, ks
Posts: 203
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Re: Q-jet CFM
If you want the 850 G-jet look for an old Caddy or Olds Toranado, they usually have them. The monsters those cars had under the hood would need them
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