Join Date: May 2007
Location: Baltimore Maryland
Re: Where to buy Q Jet ?
I have a Powerglide so no TV cable, but I went over EVERYTHING I could think of and even went over the things Sean suggested and still no luck. Here is something funny. Mat Klemp sent me one of his Q-Jet that he modified like Sean does and from point one the carb ran great. I did notice that on the SMI unit, when I got took the carb out of the box and operated the secondary air valve hold off, if I pushed it in and released it, it just opened up. The carb I got from Mat, when I pushed in the hold off and released it, it made a sort of whistle noise as it was opening up. I thing that the hold off on the SMI unit was bad. I think it was leaking internally. It didn't feel the same when I pushed it in either. It was much looser than Mat's carb. Here is another thing. After installing the SMI carb and having the issues it had, I removed it and reinstalled my Edelbrock Thunder 650 and the car/engine ran GREAT. I did nothing except for swapping the Q-Jet for the Thunder 650, NOTHING AT ALL. That right there tells me that something was wrong with the carb. I swapped the two carbs out numerous times and each time the Q-Jet was on, it ran like crap. As soon as I reinstalled the Edelbrock, BAM, Performance was back. Mat's Q-Jet gave me NONE of the issues that the SMI carb did, but it still was a little sluggish on the top end. I think it is still a little too lean. Q-Jets are extremely lean from the beginning. Mat and Sean richen them up, but I don't think they went rich enough. I am not giving up on my search for a performance Q-Jet. I have 2 cores I am going to rebuild and tweek and go richer with. I think with a richer power circuit I will get what I am after. From the writing on the secondary air valve, it looks like Mat has a 76 jet installed. I am going to go richer than that. First I am going to set it up like Mat, but with a different metering rod and holder.
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)