| Author |
 Share Topic  Topic Search  Topic Options
|
Adam Wartell 
Lifetime Member
Admin
C3VR Founder
Vette(s):
1979 "Corvette Red" Coupe
Joined: November 01 2001
Location: EAGLEVILLE, PA - USA
Posts: 10980
|
 Post Options
 Quote  Reply
 Topic: Quadrajet replacement options?
Posted: March 10 2010 at 7:32pm |
So, I want to replace my quadrajet. Please don't recommend rebuild, because that's been done 4 times already. I wanna get rid of it.
What are my EASIEST, CHEAPEST replacements?
Would I have to do anything other than disconnect and remove the old one and install and connect the new one exactly the same way? Would any mods have to be done to get the replacement to fit?
Can I put on a new carb that has an electronic choke? Would that make the replacement much harder?
Would something like this work?
Thanks!
|
|
|
 |
dskopp
Standard Member
Vette(s):
1981 White, Red Interior, 350 CU IN190hp. PS, PB (SS), A/C CC, T-Tops, Going to remain as Stock as possible. Retired Air Force after 34 years! Badger State Vetts Car Club.
Joined: May 21 2008
Location: Oak Creek, WI - USA
Posts: 1287
|
Post Options
Quote Reply
Posted: March 10 2010 at 8:20pm |
Adam,
I have heard that the Edelbrock is a good replacement for the q-Jet. $300.00 is a good price for the carb, cost me more to rebuild my quadrajet on the 81. Sounds like a winner to me!!
See you in Effingham !!
Dan
|
|
|
|
cthulhu
Lifetime Member
Vette(s):
69 Conv #'s Match 427/390, TKO-600, 3.36 HD Posi, T/T, PS, PB, Leather, Comp Mag 270 & Mag Pro Roller Rockers, Edel Air-Gap RPM, SpeedDemon 750 MS, MSD 6AL+Tach Dist+ Blaster SS+Wires, Holley Blue Fuel Pump, K&N, Jet-Hot Hooker Side-Pipes,Steeroids
Joined: April 24 2004
Location: Hot Springs, AR - USA
Posts: 2992
|
Post Options
Quote Reply
Posted: March 10 2010 at 8:25pm |
glad you came to realize what many of us have... qjets are a PITA..
edelbrock makes a quadrajet replacement that is pretty good.. as does holley.
the problem you have is that your stock intake limits you to the one card config without adding adapter plates and height...
this may seem backwards... but i would replace the intake with something like a performer that can take either square or spread bore.. and then replace the carb later with something like a street avenger or performer
|
|
|
|
cthulhu
Lifetime Member
Vette(s):
69 Conv #'s Match 427/390, TKO-600, 3.36 HD Posi, T/T, PS, PB, Leather, Comp Mag 270 & Mag Pro Roller Rockers, Edel Air-Gap RPM, SpeedDemon 750 MS, MSD 6AL+Tach Dist+ Blaster SS+Wires, Holley Blue Fuel Pump, K&N, Jet-Hot Hooker Side-Pipes,Steeroids
Joined: April 24 2004
Location: Hot Springs, AR - USA
Posts: 2992
|
Post Options
Quote Reply
Posted: March 10 2010 at 8:27pm |
|
the 1406 is a good carb.. i have one on my old truck.. but it is square flange. you would need an adapter plate (yuck) to use it.
|
|
|
|
Adam Wartell
Lifetime Member
Admin
C3VR Founder
Vette(s):
1979 "Corvette Red" Coupe
Joined: November 01 2001
Location: EAGLEVILLE, PA - USA
Posts: 10980
|
Post Options
Quote Reply
Posted: March 10 2010 at 8:46pm |
Ok, So, how about some specific intake and carb combo recommendations?
Thanks!
|
|
|
|
KDADDY79
Gold Member
Vette(s):
White '79 Corvette. It's a driver.
Joined: August 27 2007
Location: Dutchess County, NY - USA
Posts: 2253
|
Post Options
Quote Reply
Posted: March 10 2010 at 9:03pm |
Adam,
I'd stick with a Q-Jet. It'll go right on. No other changes necessary.
Check with some sponsors here or take a look at www.summitracing.com They have a rebuilt 750 CFM Q-Jet to replace yours for $300.00
Keep us posted.
Kevin
|
|
|
|
cthulhu
Lifetime Member
Vette(s):
69 Conv #'s Match 427/390, TKO-600, 3.36 HD Posi, T/T, PS, PB, Leather, Comp Mag 270 & Mag Pro Roller Rockers, Edel Air-Gap RPM, SpeedDemon 750 MS, MSD 6AL+Tach Dist+ Blaster SS+Wires, Holley Blue Fuel Pump, K&N, Jet-Hot Hooker Side-Pipes,Steeroids
Joined: April 24 2004
Location: Hot Springs, AR - USA
Posts: 2992
|
Post Options
Quote Reply
Posted: March 11 2010 at 12:56am |
a performer or performer air-gap (check clearance diagram)
and the aforementioned 1406
you probably have a rather pedestrian stock cast-iron manifold on it right now.
|
|
|
|
manchestershark
Lifetime Member
Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.
Joined: October 31 2007
Location: equinunk, PA - USA
Posts: 447
|
Post Options
Quote Reply
Posted: March 11 2010 at 6:18am |
Sounds to me like the person re-building the Q-Jet did not get it right. I like mine, works great. What issues are you having to want to change it?
BTW, If anyone has or knows of a Q-jet with # 7042203 on it, I am interested. The carb junkies site has yet to get back to me. THANKS
|
|
|
|
Gunslinger
Gold Member
Vette(s):
1969 convertible L71 427/435 4-speed black interior
Joined: September 08 2003
Location: Frederick, MD - USA
Posts: 1857
|
Post Options
Quote Reply
Posted: March 11 2010 at 6:49am |
If you're determined to get rid of your Q-jet, I agree with the others on getting an Edelbrock...they're very simple to adjust and hold their adjustments. My own suggestion would be to get an Edelbrock 1406 on a Performer EPS intake manifold or a standard Performer intake. The EPS is optimized specifically for their square-bore carburetors and has somewhat better torque and horsepower numbers than the Performer which is for both square- and spread-bore carbs.
A couple of things to keep in mind if changing to an Edelbrock, is you'll have to change the fuel line from the fuel pump to the carb inlet plus you'll need an in-line fuel filter...neither a big deal. If your car has a/c, you'll also need Edelbrock's proprietary a/c idle kick-up solenoid, which is a bit pricey. It all adds into the total cost of the conversion. You'll probably have to get an adapter bracket for the throttle cables (and cruise-control if you have it)...again, not expensive but has to be figured in.
I think you'll be quite pleased with the change. I would personally prefer to keep the Q-jet, but this combination is an excellent alternative to go with.
|
Poet...Mystic...Soldier of Fortune. As always...self-absorbed, adversarial, c o c k y and in general a malcontent.
Click image for larger pic
|
|
Redwingvette
Lifetime Member
Vette(s):
1973 Red coupe
Joined: September 13 2002
Location: Waterford, MI - USA
Posts: 1471
|
Post Options
Quote Reply
Posted: March 11 2010 at 6:50am |
I have the Edelbrock Performer intake with the Holley 4175 carb. Nothing fits like the original stuff but every year is different.
The thing to remember is that you still will need to retune the new carb for you motor and drive train. Nothing out of the box is going to be tuned correctly for every appilcation.
Not trying to scare you and I know what you mean about being tired of paying good money after bad to get the Q-jet fixed. Lots of folks out there think they can rebuild them but all they do is mix&match parts and make it worse.
Good luck.
|
Brian - NCM Lifetime Member
  
73 coupe L48, Flat-top pistons, Performer RPM Heads, Crane Cam and roller rockers, Holley 650 vac sec. Performer intake,
3.55 gear BTO 200-4R trans,
Leather seats, F-body seatbelts, Pioneer CD player
Magnaflow Exhuast System
Click here for Brian's Home Page
|
|
Adam Wartell
Lifetime Member
Admin
C3VR Founder
Vette(s):
1979 "Corvette Red" Coupe
Joined: November 01 2001
Location: EAGLEVILLE, PA - USA
Posts: 10980
|
Post Options
Quote Reply
Posted: March 11 2010 at 7:27am |
Originally posted by Gunslinger
....A couple of things to keep in mind if changing to an Edelbrock, is you'll have to change the fuel line from the fuel pump to the carb inlet plus you'll need an in-line fuel filter...neither a big deal. If your car has a/c, you'll also need Edelbrock's proprietary a/c idle kick-up solenoid, which is a bit pricey. It all adds into the total cost of the conversion. You'll probably have to get an adapter bracket for the throttle cables (and cruise-control if you have it)...again, not expensive but has to be figured in.... |
Ok, so it sounds like I need a new intake manifold and I know where I can get a new "Model 2101 SBC Performer Intake manifold" at a good price. So next is a carb to match. Perhaps the Edelbrock 1406?
However, Gunslingers tips above scare me. I can certainly remove the old carb and intake no problem. I could likely attach the new intake and carb no problem... its the connecting everything part that has got me worried now. How/where could I find step-by-step instructions on how to do this?
Thanks guys!
|
|
|
|
my7T1
Lifetime Member
Vette(s):
71 Colonnade Hardtop Coupe
Torch Red with black interior
originally L48 built to push around 360hp
Joined: August 21 2002
Location: Dorr, MI - USA
Posts: 2149
|
Post Options
Quote Reply
Posted: March 11 2010 at 7:38am |
|
I run a Holley 650 on a Performer 2101. Its a low rise manifold and gives me plenty of hood clearance. I did have to put an adaptor to change the bore. The only problem I ran into was I had to lengthen the choke linkage to reach the stovepipe. It should be no problem hooking up elec. choke. I just haven't gotten around to it yet. I also had my Quad rebuilt, but I didn't get the performance that I get from the Holley. I don't think it was the carb as much as just not being able to get it dialed in. My feelings are all three carbs are decent. The secret is like Brian says, getting em adjusted right.
My .02 "T"
|
|
|
|
Gunslinger
Gold Member
Vette(s):
1969 convertible L71 427/435 4-speed black interior
Joined: September 08 2003
Location: Frederick, MD - USA
Posts: 1857
|
Post Options
Quote Reply
Posted: March 11 2010 at 7:44am |
Take pics of everything before you start and tag every cable and hose with what they're for. That way you'll be able to know where each gets hooked up to on a new carburetor/intake combination. The Edelbrock carburetor manual tells you what port is which, etc. It's not difficult. The electric choke on the 1406 needs its hot wire attached to a power source...connect it to a source on the "run" side of the ignition, not a source that's always hot or attached to the "accessory" side of the switch.
The toughest part will probably be the new gas line. It's easier to access the line from the fuel pump from under the car, unless you simply cut the line and flare it and run rubber fuel line. Edelbrock also sells a fuel line made specifically for a small block Chevy from the fuel pump to the carb inlet with connections for an in-line fuel filter. That makes for a very professional looking installation.
None of this is tough...if I did it with my clumsy big hands, you can. Besides...they're only knuckles...bust one and you have nine more!
|
Poet...Mystic...Soldier of Fortune. As always...self-absorbed, adversarial, c o c k y and in general a malcontent.
Click image for larger pic
|
|
Adam Wartell
Lifetime Member
Admin
C3VR Founder
Vette(s):
1979 "Corvette Red" Coupe
Joined: November 01 2001
Location: EAGLEVILLE, PA - USA
Posts: 10980
|
Post Options
Quote Reply
Posted: March 11 2010 at 8:07am |
Originally posted by Gunslinger
Take pics of everything before you start and tag every cable and hose with what they're for. That way you'll be able to know where each gets hooked up to on a new carburetor/intake combination. The Edelbrock carburetor manual tells you what port is which, etc. It's not difficult. The electric choke on the 1406 needs its hot wire attached to a power source...connect it to a source on the "run" side of the ignition, not a source that's always hot or attached to the "accessory" side of the switch.
The toughest part will probably be the new gas line. It's easier to access the line from the fuel pump from under the car, unless you simply cut the line and flare it and run rubber fuel line. Edelbrock also sells a fuel line made specifically for a small block Chevy from the fuel pump to the carb inlet with connections for an in-line fuel filter. That makes for a very professional looking installation.
None of this is tough...if I did it with my clumsy big hands, you can. Besides...they're only knuckles...bust one and you have nine more! |
I appreciate all this advice. Now, not to sound completely helpless, but could you point me to all these parts that you are talking about on Edelbrock's (or some vendor's) website? That way I'd know I'm getting the exact stuff you are talking about.
As mentioned, I'd like to start with the "Model 2101 Performer Intake manifold" as my base. Since I can get a new one very cheaply.
Thanks!
|
|
|
|
Gunslinger
Gold Member
Vette(s):
1969 convertible L71 427/435 4-speed black interior
Joined: September 08 2003
Location: Frederick, MD - USA
Posts: 1857
|
Post Options
Quote Reply
Posted: March 11 2010 at 11:50am |
The Edelbrock number for the fuel feed line is 8126 without a filter and 8131 with a filter. With these you can simply cut and flare your old fuel line and add flexible fuel line. Summit Racing may well have equivalent parts under their own name for less, plus they sell the Edelbrock parts as well.
Summit also sells the throttle/cruise control/transmission kickdown cable brackets as well...under their name and Lokar as well.
The Edelbrock a/c idle compensator is part #8059.
|
Poet...Mystic...Soldier of Fortune. As always...self-absorbed, adversarial, c o c k y and in general a malcontent.
Click image for larger pic
|
|
ebo
Lifetime Member
Vette(s):
#1 *1980 White, Red interior 14,000 mile
#2 *1980 Red, Oyster interior 93,000 miles Resto project car, rebuilt to 383 stroker
Joined: June 03 2008
Location: Holland Patent, NY - USA
Posts: 2175
|
Post Options
Quote Reply
Posted: March 11 2010 at 4:28pm |
Heh wildman, I done saw you change a distributer 15 times in 15 minutes, you can handle this. Do you have a flaring tool?
 ebo |
|
|
|
indy99
Gold Member
Vette(s):
Still working on the car. Sometimes too hot, too rainy, or too humid. Its been a tough year.
1980 L-48 still in the middle of a frame-off.
Joined: June 09 2005
Location: Newport, MI - USA
Posts: 724
|
Post Options
Quote Reply
Posted: March 11 2010 at 6:17pm |
I was just on the Edelbrock site and they have reconditioned 1406 carbs for $235.95. Saves you some bucks there. http://store.edelbrock.com/9906.aspx
|
Corvettes and women are the same...You want to make love to them but they keep breaking down. 
|
|
SilverStreak
Lifetime Member
Vette(s):
1978 Silver Anniversary model. Original L82 engine, 700r4 trans, edelbrock intake, thorly headers, rack&pinion steering, mono rear and front spring, MSD 6A box
Joined: November 19 2003
Location: Oceanside, CA - USA
Posts: 191
|
Post Options
Quote Reply
Posted: March 11 2010 at 6:28pm |
|
About 6 years ago my QJet was leaking so had to get a new one. Went with Edelbrock and havn't had any problems and it was a unbolt old one and bolt on new one. Everthing hook up the same as the factory one. If you have any questions call Edelbrock they are more than helpful.
|
|
|
|
Gunslinger
Gold Member
Vette(s):
1969 convertible L71 427/435 4-speed black interior
Joined: September 08 2003
Location: Frederick, MD - USA
Posts: 1857
|
Post Options
Quote Reply
Posted: March 11 2010 at 7:33pm |
Edelbrock doesn't sell their Q-jets anymore. It's been several years since they dropped them from their catalog and sold off the remaining units at a discount some time ago. I've heard the tooling was scrapped but I have no confirmation of that.
All I can guess is the market for new Q-jets wasn't there, or if the tooling was destroyed, that pretty much makes the decision for them to stop listing them.
|
Poet...Mystic...Soldier of Fortune. As always...self-absorbed, adversarial, c o c k y and in general a malcontent.
Click image for larger pic
|
|
Adam Wartell
Lifetime Member
Admin
C3VR Founder
Vette(s):
1979 "Corvette Red" Coupe
Joined: November 01 2001
Location: EAGLEVILLE, PA - USA
Posts: 10980
|
Post Options
Quote Reply
Posted: March 11 2010 at 8:18pm |
Originally posted by ebo
Heh wildman, I done saw you change a distributer 15 times in 15 minutes, you can handle this. Do you have a flaring tool?
ebo |
That's cause I had more experienced men show me how to do it 12 times first.
A no, no flaring tool.
|
|
|
|
Printable Version
Delicious
Digg
Facebook
Furl
Google
MySpace
Newsvine
reddit
StumbleUpon
Twitter
Windows Live
Yahoo Bookmarks
60