The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

**'68OrangeSunshine** · 03-02-2012, 08:16 AM

I ran one for about 25 years on a 292 bored .030-over. Sometimes it ran good. I always needed an expert to tune it up. When it backfired I was out $8.50 for a new power valve.
On my last rebuild, I ran the 8007 holley 390 CFM for the first 500 mile break-in, then it blew a power valve, possibly manifold leak-related. I wouldn't set up right. My Holley guy was going thru an extremely painful divorce and so I would up getting the Edelbrock 500 CFM 1404, clone of the Carter AFB. Now a 400 CFM AFB might sound ideal, but no one makes that small an aftermarket carburetor anymore. Because of a demand type secondary, the EDL-1404 only draws in as much air as it needs. QJets do about the same. I never had good luck with the QuardaJet even on V8s.

03-02-2012, 08:16 AM	#23
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,050	Re: quadrajet on a 250 inline advice I ran one for about 25 years on a 292 bored .030-over. Sometimes it ran good. I always needed an expert to tune it up. When it backfired I was out $8.50 for a new power valve. On my last rebuild, I ran the 8007 holley 390 CFM for the first 500 mile break-in, then it blew a power valve, possibly manifold leak-related. I wouldn't set up right. My Holley guy was going thru an extremely painful divorce and so I would up getting the Edelbrock 500 CFM 1404, clone of the Carter AFB. Now a 400 CFM AFB might sound ideal, but no one makes that small an aftermarket carburetor anymore. Because of a demand type secondary, the EDL-1404 only draws in as much air as it needs. QJets do about the same. I never had good luck with the QuardaJet even on V8s. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.