Well i just rebuilt my 305 and I might have 50 miles on the new engine plus some time just running. Well First its bored 30 over and I put a bigger cam in it. Also I took the computer out and put a hei distibutor with the vac advance on it from jegs. WELL when I first got the car it ran ok.. but it pulled good all the way through till about 85 pretty good. (thats all I had it to) BUT it was running way to rich with fuel and would foul the plugs. SO i got a used NON feed back quadra jet carb. well The car is running ok. BUT when you go to WOT at about 50 or 55 it doesnt take off or pull very hard like when you take off from 15 or 20. It just accelerates like your at 1/4 throttle whats going on? PLEASE HELP!!!

 

You need to tune the secondaries. That's a matter of having a proper choke pull-off (there's a link between the pull-off and the secondary air valve), properly adjusting the AV tension (see the link in the carb sticky above), and tuning the rods & hanger. If your CC carb ran well on the secondaries before you removed the computer (why you did that is beyond me), then use the rods and hanger that were on it in your non-CC computer.

 

thanks. well the old carb ran rich with fuel no matter the tune on it and would foul the plugs with in a few miles of driving it

 

well I went and looked at my carb and the plunger that pulls the peice of metal that releases the secondary lockout didnt have a vac line hooked up to it so im not sure if thats what was wrong or not. Ill drive the car in the morning.

BTW I have the choke blocked off. Also what good does the secondary lockout do?

 

The secondary lockout prevents people from using full power before the engine is warmed up. It sometimes is forgotten when reassembling a q-jet. . .

The vacuum pull-off helps prevent bog when the secondaries open. Works in conjunction with the AV tension spring.