Topic: Quadrajet replacement options?
in Forum: C3 Fuel, Emission Control, and Exhaust Systems
Already a Member?
Click Here to Login
Not yet a Member?
Click Here to Register for Free!
Lifetime MemberC3VR Founder
Eagleville, PA - USA
Joined: 11/1/2001
Posts: 18378
Vette(s): Used to own a 1979 Corvette now owned by JB79
[QUOTE=KDADDY79]
Adam,
Were you able to test it out on a good long ride?
[/QUOTE]
Nope. Not yet.
-Adam Wartell
NCM Lifetime Member #1222
Founder: C3 Vette Registry
C4 Vette Registry, C6 Vette Registry
My first Vette, now owned by JB79:
SPONSOR AD:: (Our Sponsors help support C3VR)
Lifetime MemberModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Dang...I been missin this thread for a while. Glad ya got the vac. leak fixed there, Boss.
And...to Ben...yer such a troublemaker!!!
I just now went to CF and read thru Adam's thread....
Now ya know why I love this place so much! Everyone's opinion/facts are accepted, and you can either take the advice/info, or not...up to you. No "I know everything about everything because I read it on the internet" attitudes here.
I have often stated that some procedures work well for me, but not might for someone else. That's just the way it is.
Sorry for the "off topic" garbage....I'm done now.
I hope the vac advance lines cures your engine problem, Adam. I bet it does, and your fule mileage should also improve.
Adams' Apple 2010-04-08 07:07:42
And...to Ben...yer such a troublemaker!!!
I just now went to CF and read thru Adam's thread....
Now ya know why I love this place so much! Everyone's opinion/facts are accepted, and you can either take the advice/info, or not...up to you. No "I know everything about everything because I read it on the internet" attitudes here.
I have often stated that some procedures work well for me, but not might for someone else. That's just the way it is.
Sorry for the "off topic" garbage....I'm done now.
I hope the vac advance lines cures your engine problem, Adam. I bet it does, and your fule mileage should also improve.
Joel Adams
C3VR Lifetime Member #56 
My Link 
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
I know I haven't been on much. But I support the q-jet, which now seems to be working.
A carb is often blamed when a car does not run correctly, and there are other problems present. I am really interested in knowing how the car runs after a bit of an extended drive. I have a vested interest in this one. I was the third rebuilder. Adam sent the carb to me in a box. I rebuilt it, but do not have a flow bench. He put it back on, and it was better. Some time after that, Adam and I got together here in Ohio, and I made many adjustments. It sat over night to confirm the choke operation. Back to PA he went. It was a nice visit, but very short.
I did not have a chance to do a full engine analysis. At that time, the hose was okay. But that's been a couple of years.
Adam, before repacement, make sure all the other things on the engine are connected and working properly. And there are many, all of which can cause problems. As you now know, the little things make a huge difference. I hope this remains just minor things.
Before taking a big plunge, give me a call. Maybe I can help.
Adam you made the right decision in keeping your Qjet. I am feeding a 406 small block with one and it dyno'd at over 450 hp. When properly set up they will run with the best of the performance carbs and get better mpg when your little pedal is just caressed rather than being slammed against the carpet.
The model you have can be easily converted to an electric choke by replacing the cover with an electric unit and plugging the heat tube line with a rubber plug. The power will need to be a new line from an ignition on source, but do not use the distributor feed.
Pic 1
Primary and secondary metering rods, primary jets can be changed to tweak the carb for performance. The biggest mistake made is in the setting of the secondary air flap. Since it also controls the depths of the rods in the jets allowing it open to soon will make it bog. this is easy to adjust with an allen wrench and screwdriver.
Tension Spring adjusting screw
(modified LARGE pics to links)
Adams' Apple 2010-04-09 10:16:16
The model you have can be easily converted to an electric choke by replacing the cover with an electric unit and plugging the heat tube line with a rubber plug. The power will need to be a new line from an ignition on source, but do not use the distributor feed.
Pic 1
Primary and secondary metering rods, primary jets can be changed to tweak the carb for performance. The biggest mistake made is in the setting of the secondary air flap. Since it also controls the depths of the rods in the jets allowing it open to soon will make it bog. this is easy to adjust with an allen wrench and screwdriver.
Tension Spring adjusting screw
(modified LARGE pics to links)
Lifetime MemberHot Springs, AR - USA
Joined: 4/24/2004
Posts: 3236
Vette(s): 69 Conv #'s match 427, TKO-600/.64, 3.36HD-Posi, HT, T/T, PS, PB, PW, SP, Leather, Comp XE264HR & Roller Rockers & Lifters, Air-Gap RPM intake, Holley St Av 770 VS, MSD 6AL+Dist+Blaster SS, K&N, Jet-Hot Hooker Side-Pipes, Steeroids, Al Rad, Spal Fans
[QUOTE=kstyer]I know I haven't been on much. But I support the q-jet, which now seems to be working.
[/QUOTE]
good to see you back...
in Forum: C3 Fuel, Emission Control, and Exhaust Systems
SPONSOR AD: (Our Sponsors help support C3VR)