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3/10/10 10:32pm - Original Message: 'Quadrajet replacement options?'
Adam Wartell Lifetime Member
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Eagleville, PA - USA

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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!



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3/10/10 11:20pm - Reply: 'Quadrajet replacement options?'
dskopp
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Oak Creek, WI - USA

Vette(s):
1981 Great White Shark. Red Interior, 350/190hp. PS, PB (SS), A/C CC, T-Tops, Going to remain as Stock as possible. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vetts Car Club. 175,000 Original miles!!

Joined: 5/21/2008
Posts: 1956
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


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3/10/10 11:25pm - Reply: 'Quadrajet replacement options?'
cthulhu Lifetime Member
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Hot Springs, AR - USA

Vette(s):
69 Conv #'s Match 427, TKO-600, 3.36HD-Posi, T/T, PS, PB, PW, SP, Lthr, Comp Mag 270 & Pro Rlr Rockers, Edel Air-Gap RPM, BG SD 750 MS, MSD 6AL+Tach Dist+ Blaster SS+Wires, Hly Bl Fuel Pump, K&N, Jet-Hot Hkr Side-Pipes,Steeroids, Al Rad, Spal Fans

Joined: 4/24/2004
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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
 
 


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3/10/10 11:27pm - Reply: 'Quadrajet replacement options?'
cthulhu Lifetime Member
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Hot Springs, AR - USA

Vette(s):
69 Conv #'s Match 427, TKO-600, 3.36HD-Posi, T/T, PS, PB, PW, SP, Lthr, Comp Mag 270 & Pro Rlr Rockers, Edel Air-Gap RPM, BG SD 750 MS, MSD 6AL+Tach Dist+ Blaster SS+Wires, Hly Bl Fuel Pump, K&N, Jet-Hot Hkr Side-Pipes,Steeroids, Al Rad, Spal Fans

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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.

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3/10/10 11:46pm - Reply: 'Quadrajet replacement options?'
Adam Wartell Lifetime Member
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Eagleville, PA - USA

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Ok, So, how about some specific intake and carb combo recommendations?

Thanks!


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3/11/10 12:03am - Reply: 'Quadrajet replacement options?'
KDADDY79
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Dutchess County, NY - USA

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White '79 Corvette. It's a driver.

Joined: 8/27/2007
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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


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3/11/10 3:56am - Reply: 'Quadrajet replacement options?'
cthulhu Lifetime Member
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Hot Springs, AR - USA

Vette(s):
69 Conv #'s Match 427, TKO-600, 3.36HD-Posi, T/T, PS, PB, PW, SP, Lthr, Comp Mag 270 & Pro Rlr Rockers, Edel Air-Gap RPM, BG SD 750 MS, MSD 6AL+Tach Dist+ Blaster SS+Wires, Hly Bl Fuel Pump, K&N, Jet-Hot Hkr Side-Pipes,Steeroids, Al Rad, Spal Fans

Joined: 4/24/2004
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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.
 


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3/11/10 9:18am - Reply: 'Quadrajet replacement options?'
manchestershark Lifetime Member
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Equinunk, PA - USA

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1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

Joined: 10/31/2007
Posts: 1895
 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


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3/11/10 9:49am - Reply: 'Quadrajet replacement options?'
Gunslinger
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Frederick, MD - USA

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1969 convertible L71 427/435 4-speed black interior

Joined: 9/8/2003
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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.  


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3/11/10 9:50am - Reply: 'Quadrajet replacement options?'
Redwingvette Lifetime Member
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Waterford, MI - USA

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1973 Red coupe

Joined: 9/13/2002
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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.
 


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3/11/10 10:27am - Reply: 'Quadrajet replacement options?'
Adam Wartell Lifetime Member
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Eagleville, PA - USA

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[QUOTE=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....
[/QUOTE]

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!


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3/11/10 10:38am - Reply: 'Quadrajet replacement options?'
my7t1 Lifetime Member
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Dorr, MI - USA

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71 Colonnade Hardtop Coupe Torch Red with black interior originally L48 built to push around 360hp

Joined: 8/21/2002
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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"



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3/11/10 10:44am - Reply: 'Quadrajet replacement options?'
Gunslinger
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Frederick, MD - USA

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1969 convertible L71 427/435 4-speed black interior

Joined: 9/8/2003
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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!


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3/11/10 11:07am - Reply: 'Quadrajet replacement options?'
Adam Wartell Lifetime Member
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Eagleville, PA - USA

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Used to own a 1979 Corvette now owned by JB79

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[QUOTE=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!
[/QUOTE]

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!


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3/11/10 2:50pm - Reply: 'Quadrajet replacement options?'
Gunslinger
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Frederick, MD - USA

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1969 convertible L71 427/435 4-speed black interior

Joined: 9/8/2003
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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.


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3/11/10 7:28pm - Reply: 'Quadrajet replacement options?'
ebo Lifetime Member
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Holland Patent, NY - USA

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#1 *1980 White, Red interior 14,000 mile #2 *1980 Red, Oyster interior 93,000 miles Resto project car, rebuilt to 383 stroker

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Heh wildman, I done saw you change a distributer 15 times in 15 minutes, you can handle this. Do you have a flaring tool?
Evil Smileebo


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3/11/10 9:17pm - Reply: 'Quadrajet replacement options?'
indy99
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Newport, MI - USA

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1980 L-48 still in the middle of a frame-off.

Joined: 6/9/2005
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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

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3/11/10 9:28pm - Reply: 'Quadrajet replacement options?'
SilverStreak Lifetime Member
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Oceanside, CA - USA

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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: 11/19/2003
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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. 

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3/11/10 10:33pm - Reply: 'Quadrajet replacement options?'
Gunslinger
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Frederick, MD - USA

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1969 convertible L71 427/435 4-speed black interior

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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.


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3/11/10 11:18pm - Reply: 'Quadrajet replacement options?'
Adam Wartell Lifetime Member
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Eagleville, PA - USA

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Used to own a 1979 Corvette now owned by JB79

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[QUOTE=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?
Evil Smileebo
[/QUOTE]

That's cause I had more experienced men show me how to do it 12 times first.

A no, no flaring tool.


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