Author Topic: fairly new to the world of carbs.  (Read 1666 times)

Offline 1979C20

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fairly new to the world of carbs.
« on: December 07, 2010, 12:10:41 AM »
 I'm 17 and rebuilt my engine myself when I was 16. But, I wouldnt dare venture into the world of rebuilding my qjet. And, my procrastination caused my rebuild kit to get left out in the rain and get destroyed. So, My carb leaks fuel into my vacuum lines, takes a bit of time to come down from high rpms, and sputters when I jump on the throttle, and it is tuned to the best anyone i know can tune it. So, I am looking to replace my carb, but I'm on a STRICT budget. Like, $50 bucks preferably, $75 at max. I'm finding a few holleys on craigslist, but the primaries and secondaries are the same size, where on my intake, the primaries are smaller than the secondaries(spreadbore?). So, I wanted to know if there were a way to use the holleys I am finding on my truck without getting a new intake. Probably a fairly novice question, but its my first truck and what nots. Thanks in advanced.
1979 SCLB C20 Q-jet 350 SM465 14b F.F. 4.10 G80
1989 GMC Suburban V2500 TBI350 TH400 4in lift 35's 14b SF

Online Irish_Alley

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Re: fairly new to the world of carbs.
« Reply #1 on: December 07, 2010, 12:56:58 AM »
they do make adapter plates at the parts store for that
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Offline 1979C20

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Re: fairly new to the world of carbs.
« Reply #2 on: December 07, 2010, 12:57:23 AM »
What is the adapter plate called?
1979 SCLB C20 Q-jet 350 SM465 14b F.F. 4.10 G80
1989 GMC Suburban V2500 TBI350 TH400 4in lift 35's 14b SF

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Re: fairly new to the world of carbs.
« Reply #3 on: December 07, 2010, 01:02:43 AM »
im trying to find them online. but cant seam to right now but i know they are in the "performance" section if i can remember right they are chrome with like a brown center kind of hope im not getting your hopes up for nothing ::)
« Last Edit: December 07, 2010, 01:07:41 AM by Irish_Alley »
If you canít tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline jaredts

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Re: fairly new to the world of carbs.
« Reply #4 on: December 07, 2010, 05:29:25 AM »
You can find the adapter plates in the section where the parts store sells carbs usually.  If you can rebuild your engine you can handle rebuilding a quadrajet.  The hardest part is getting the levers back in place around the choke.  Most of it is dead simple.  If you buy a $75 carburetor there's a good chance it needs rebuilt.

Offline 78 Chevyrado

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Re: fairly new to the world of carbs.
« Reply #5 on: December 07, 2010, 08:24:13 AM »
Holley carbs are SQUAREBORE, all the holes are the same size.  Q-Jets are SPREADBORE, 2 small primaries and to large secondaries.

You need a "squarebore to spreadbore" adapter, like this one.  I have this one on my truck.  works great.
http://www.summitracing.com/parts/EDL-2696
Kenny

1978 C-20, 350/400, 3.73, Graystone Metallic, Raceline Renegade 8 Wheels - 18x8.5, 275/70R18 BFG KO's