First and formost, Merry Chirstmas to all and here's to a happy and prosperious new year, we need it with this hobby of ours!

I finally made the decision to replace the original quad with a new Holly 650. I read all of the previous posts but was convinced by the mechanic. I pick it up this afternoon, what a difference! I don't know if the old quad was so far out of wack or if the Holly is really SO far superior. I bought the car in July so not much of a track record with the car.

There is no sluggish bogging down when excellerating. I was on the interstate going 65 punched it and within seconds I was at 90, I really feel like I'm in someone else's car. This is the car I thought having a vet was all about. There's my 2 cents on the subject.

I know what you mean, I swaooed out a q-jet for a 650 and performer intake, made all the difference in the world. Give the q credit though, it's a great carb, chances are, your mechanic didn't want to or doesn't like working them. Either way, have a ball with it now that it runs the way you want it too. When I did my swap, I just boxed up the old intake and carb.

The q-jet is a very good carb.   But any worn out carb replaced will make a huge difference.  Glad to hear it's running good.

By the way............the swap I dis was on an L-48 73. I'm keepin the 3X2 set up on the 68!!!!!!!!!!!!!

I hear all of you, I agree a bad carb doesn't mean it was originally a bad design. I left the intake as-is, didn't have the dough during the holidays with an 9 and 11 yo old waiting for Santa stash. There was a clearance issue that caused me to loose my nice chrome nut atop of the air filter lid. Took the car out again today and man it is nice having some get up and go.

 I put a Performer Intake on my 73- L-48 with my Q Jet it was a big difference, when those big secondaries open, up you know it! I tried a Holley once, but went back to the Q Jet.If you know how to set them up their unbeatable.

   Dave

Left my intake as-is also, but changed out the Q Jet (kept it) with the Holley 650. Has more punch! Did a little custom work with the air filter for good hood clearance.

I have a Holley but would have no problem going back to the Q-jet if I could get it rebuilt by someone that knows what they are doing. I only bought the Holley because I was working on a friends car and had a couple beers in me so I let him talk me into it.

I you ever decide to go back to a Q-jet, try this guy out http://www.smicarburetor.com . He set me up a Q-jet that absolutely flys! He asks for all the specs to your car, weight, engine, tranny, cam, rear end ratio, tire diameter. Then sets up a carb for that application.

Bolt it on, tweak the Air Fuel mixture screws, set the idle as per instructions. Simple.

I had a Holley Street Avenger 670 with no luck, that d*mn thing would run different everytime I drove the car. So after 2 weeks of messing with it, off it came. Then I put on a Edelbrock Q-jet. Not bad. Car ran ok with it. Come to find out later on, they use "truck" metering rods which can cause a lean condition at WOT. Not good unless you want to melt the pistons out of it.

Good luck!

Sarge

   

Sarge8138714.3405555556