I was wondering if there is anyone here that has upgraded the performance of their quadrajet or is it just easier to go to a holley or edelbrock? I get very good road driving ability with my quadrajet on my 74 350, and it also delivers great gas mileage but it doesnt respond as quick as I'd like it too the secondary vacuum is slow coming in. I know going to something else will effect fuel mileage but i want better response. I havent tried to make any changes with the quad yet. Was wondering if there are any websites that offer ideas and products?

Thanks
Rodney

I'm not able to do a good rebuild on my own so I sent my Q-Jet out for a rebuild a few years ago.

Getting it rebuilt RIGHT meant all the difference in the world. Since then I can really feel the secondaries go to work.

I had mine rebuilt by http://www.thequadshop.net/  Great to deal with!

KDADDY792010-10-22 20:00:41

Adjust the door on the secondaries for lighter spring tension, and the secondaries will open faster. The adjustment is under the secondary door rod on the top of the carb.if you are not sure about the screw look on line and you can get a look at which one to turn......... Bill

Remember the secondaries are supposed to come in as the engine can support the additional airflow.  It is not necessarily a good thing to make them open faster.  Overall engine condition and tune must first be addressed, then carb adjustments checked.  Then worry about a rebuild.

Larry

Rodney, send me a PM with your email address and I can send you some info on the Q-Jet that may help you !!

Hey Rodney if you are free this weekend maybe we can get together and tweak the secondary or the accelerator pump..I am not going anywhere this weekend so it would work for me to tune it a little if need be..it would be fun to do before CFC.
Rich

Rich, Appreciate the offer but this weekend is the guys golf trip. We leave Thursday for 4 days off golf food and rest! The first weekend I have free is the weekend of the 11th. Maybe then we can give it a shot if your free. Thanks
Rodney

Hey Rodney that sounds great on the 11 th..would be fun.

OK, so when I mash the accelerator there is a stumble... and fuel mileage seems to have decreased. You say this guy is good ay rebuilding Q-jets. ...been contemplating switching to Holley.

Joe, Rebuilding the carb is not that hard of a job. These carbs are not that difficult to make them run good. I am looking to get more of a high performance response with mine and that is not the standard set up. The reason I would like to stay with the quadrajet is because when just driving out on the road the economy is better then anything I think you can get. You can certainly get rid of your stumble as long as you have a good carb to work with. And yes tuneup could also play a major part in the stumble as well. Good luck.
Rodney