Join Date: May 2007
Location: Baltimore Maryland
Re: New Edlebrock carb wont idle below 1,000
When I was having my issues with my Q-Jet, I ran an Edelbrock Thunder 650 on a Performer RPM Q-Jet manifold. He rear of the flange is larger to accomodate the Q-Jet so the secondary butterflies getting stuck on the manifold can't happen. The Performer is made to run either a spreadbore or a squarebore. No need to run an adapter. The problem you are having sounds like a vacuum leak. Hold your hand over the primary bore and see if the engine bogs or stalls. If not, then the engine is getting air from somewhere else. As far as the backfires, the Edelbrocks are pretty tough when it comes to that.
On a side note, I HIGHLY, AND I MEAN HIGHLY, suggest making the switch to a Q-Jet. For the street they can't be beat, hands down. They are the best carb for the street and possibly ever built. With the right mods, they can outperform any carb built. They are great for MPG and also when the right mods are done, they can deliver some OUTSTANDING POWER!!! I made the switch about 2 months ago and I kick myself for not doing it sooner. Mine runs like fuel injection.
Charlie Knudsen 67 Camaro RS/SS 350 TKO 600, 4.10's, AFR 195 Street Heads, Comp 270H, Rhoads Lifters, Crane Ignition, Pertronix Dizzy, Performer RPM Q-Jet, Heavily Modified Q-Jet, Hooker Comp Headers, MagnaFlow 2 1/2", 144 Decibles(Alpine CDA-7998 Head Unit, RF X7 and RF 750X Amps, MB Quart Mid's & High's, Kicker L7 12" Solo Barics)