New 750 3310-C Holley Carb installed. [Archive] - Chevelle Tech

: New 750 3310-C Holley Carb installed.


plain 69
Mar 28th, 04, 10:47 PM
Finally put my Carb Shop 800 CFM Q-jet on the shelf after about 12 years of flawless service. I got tired of the gas leaking out of the float bowl and drenching the cylinders. It was epoxied a couple times and it lasted about 4 years or so and has to be done again so I put it up on the shelf for another time.

I put my new carb on about 3 weeks ago and finally got out on a deserted road and let her have it once from a dead stop. Let me tell you that thing has never ran from a dead stop before just hazing the drag radials. I can spin them babies all the way through first and the q-jet would not.

Best time before is in my signature and now I thinking with slicks this thing might run 12.30's. I will be heading to the track with it later in the year to see.

Anyway on the carb I added a secondary metering block kit plus installed a quick change secondary spring kit. Right now it has the 6.5 pv with the standard shooters, actuating cam and 72's in the front and 78's in the rear. I also have a purple spring in the vaccuum pod for the secondaries. Used the 1970 Z-28 LT-1 350 fuel lines from the Right Stuff and it looks good that way.

Just drove 80 miles today with a couple blasts through 1st and 2nd and the milage seems as good or better than the Q-jet. Filled it back up and it held about 5 gallons. I should have done this a long time ago. The RPM's come up a lot quicker now. Good thing the 6AL box is in there.

69LS1
Mar 29th, 04, 12:07 AM
graemlins/thumbsup.gif

Sounds like you have a combination of enough CID and gearing that it's simply likes a standard flange carb.You have enough engine not to need tiny little primaries to maintain good air speed and the secondaries being smaller on the Holley come on harder than the huge Qjets secondaries.Kinda the ideal situation for your type of use.

plain 69
Mar 29th, 04, 8:48 AM
I just wonder if the Performer RPM Q-jet intake performs the same a as regular Performer RPM? I am still using the Performer RPM Q-jet intake since it does have the dual bolt pattern.