C3 Vette Registry - The Best Resource on the Net for C3 Vettes! C3 Vette
Forums -> C3 Fuel, Emission Control, and Exhaust Systems
Not Logged In! Login or Register!  Users Online: 34 / Help 
Features  Find C3 Parts on ebay in only 2 or 3 clicks!  | Add YOUR C3 to the Registry

Supporting Vendors
Bair's Corvettes
Volunteer Vette Products
VetteBookStore.com
Mid America Motorworks
CorvetteClothing.com

C3 of the Month
None Current
Enter Yours Today!
Online C3 Show
13
C3s are Registered

Vanity Plates
A78VETTE
corvettejoe
Featured Links

Buy Now
GM Corvette 1963-82 (Chilton's Total Car Care Repair Manuals) (Paperback)
GM Corvette 1963-82 (Chilton's Total Car Care Repair Manuals) (Paperback)


Corvette Masterpieces: Dream Cars You'd Love to Own (Hardcover)
Corvette Masterpieces: Dream Cars You'd Love to Own (Hardcover)


Corvette Fifty Years (Hardcover)
Corvette Fifty Years (Hardcover)


Corvette from the Inside
Corvette from the Inside



| Hide Signatures and Profile Pics

 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page 1 2 3 [4]  
 
Support C3VR!
Suport our advertisers
3/21/10 8:45am - Reply: 'Quadrajet replacement options?'
cthulhu Lifetime Member
Lifetime Member
- Send Private Message


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
Posts: 3194
Lars is definitely biased towards the q-jet

he is right that a well functioning q-jet is a better carb, but they are hard to maintain and often a rebuilt unit is a POS

with your discovery of the vacuum line burnt you do have a choice

you can replace it and see how your engine runs and stay with a pain in the a$$ carb and a very pedestrian intake.

Or you move to simpler and less error prone carb that is plenty power enough for your baseline 350 on a better intake without the burden of emissions controls.

As for his claim of obsolete ( and he really is a sanctimonious blowhard) it is like saying windows xp is obsoloete... True....   But q-jet would be vista in that comparison


____________________________________
http://www.vetteprojects.com/bmv
 Reply Reply  Quote Reply w/Quote
3/21/10 1:22pm - Reply: 'Quadrajet replacement options?'
cthulhu Lifetime Member
Lifetime Member
- Send Private Message


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
Posts: 3194

I refuted alot of the unsubstantiated BS over on CF.  I am about to get flamed for doing so.  Which is why it has been so long since I used CF that I had to make a new account as I forgot my pass and the email address used was one I abandoned years ago.



____________________________________
http://www.vetteprojects.com/bmv
 Reply Reply  Quote Reply w/Quote
3/21/10 5:23pm - Reply: 'Quadrajet replacement options?'
Gunslinger
Former Member
- Send Private Message


Frederick, MD - USA

Vette(s):
1969 convertible L71 427/435 4-speed black interior

Joined: 9/8/2003
Posts: 3398
Lars is extremely knowledgeable about Q-jets, and is understandably biased towards them.  A Q-jet is an outstanding carburetor when properly set up, adjusted and maintained! That's the secret and the headache of Q-jets today.  There just aren't that many techs around that know them anymore...Holleys, Edelbrocks and Demons?  Sure...lots of techs familiar with them as that's where todays carburetor market is...not Q-jets.  Lars is one of those few guys that can make a Q-jet "sing".

There's also a shortage of quality Q-jet cores that can be rebuilt properly to get the most out of them.  That's simply a fact or life and the good cores are in demand by Corvette restorers interested in the numbers and date codings.

I'm not going to trash the guys on CF...lots of good guys there, plus some guys that one would think are Porsches owners from their attitude.  Just a fact of life.  Lots of differing opinions and experiences...and not all are rooted in reality.

With the Edelbrock Performer intake and Edelbrock carburetor, I can't see how you'll be unhappy...quality stuff, easy to adjust and hold the adjustments, simple to deal with.  You may well have to dial things in once installed, but you'll be happy with the results.  

Nothing worth while comes easy...shedding a little blood and grief is par for the course.


____________________________________
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
 Reply Reply  Quote Reply w/Quote
3/21/10 8:21pm - Reply: 'Quadrajet replacement options?'
Adam Wartell Lifetime Member
Lifetime Member
C3VR Founder
- Send Private Message


Eagleville, PA - USA

Vette(s):
Used to own a 1979 Corvette now owned by JB79

Joined: 11/1/2001
Posts: 14712
I saw your post(s) on CF.  You definitely heated things up.  That happens over there if you refute their opinions. 

Since I came across that burnt hose, I decided to put everything back, replacing the hose.  (Also, had to replace the cap that I just replaced in Mystic, cause a plug wire terminal was broken. I'm guessing it broke when I pulled the wire off, but can't be sure.)  

It fired right up, high idled very nicely, kicked itself down nicely, curb idled nicely, and ran around the block a couple times really well!  I can't believe what a difference once little hose can make!  The next test will be actually taking it out on a drive somewhere for real, not just a run around the block.  

Also, I have to see if I can fix that exhaust rattle we discovered in mystic.  I have to take it for inspection soon, to the guy that installed the exhaust, so I'll see if they can find it and fix it.

Looks like I'm sending the Edelbrock parts back to Jegs.  I guess I'll have to eat the shipping cost both ways.  Oh well.

Thanks for all your help guys! 


____________________________________
-Adam Wartell
NCM Lifetime Member #1222
Founder:
C3 Vette Registry (Join C3VR on facebook)
C4 Vette Registry, C6 Vette Registry
C7 Vette Registry
Corvettes for a Cure

My first Vette, now owned by JB79:

 Reply Reply  Quote Reply w/Quote
3/21/10 8:58pm - Reply: 'Quadrajet replacement options?'
cthulhu Lifetime Member
Lifetime Member
- Send Private Message


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
Posts: 3194
im glad it worked out for you... 
 
hopefully that vacuum hose was the main source of your problem.  a vac leak is a big deal.
 
shipping is better than paying for everything.
 
as for CF..  like I said..  if you disagree with lars or one of his many parrots you get flamed and that is why I dont go over there.  If the point iof the c3 forum there is having one guy share his opinion and a hundred people regurgitate it then they have suceeeded.
 
 
 
 


____________________________________
http://www.vetteprojects.com/bmv
 Reply Reply  Quote Reply w/Quote
3/22/10 3:23pm - Reply: 'Quadrajet replacement options?'
KDADDY79
Former Member
- Send Private Message


Dutchess County, NY - USA

Vette(s):
White '79 Corvette. It's a driver.

Joined: 8/27/2007
Posts: 2484

Hey Adam,

It sounds like you may have nailed it. I'm hoping that a good, long ride will give you trouble free results.

Let us know how it goes.
 
P.S. My exhaust had a rattle that was caused by the flap on the passenger side exhaust manifold. I wired it open and the problem was easily solved.
Kevin 


____________________________________
 Reply Reply  Quote Reply w/Quote
3/22/10 3:57pm - Reply: 'Quadrajet replacement options?'
nosal1 Gold Member
Gold Member
- Send Private Message


Dunedin, FL - USA

Vette(s):
1980 Corvette Torch Red with Gold metallic 370HP/350 CU.IN.Turbo 350 w/shift kit.Originally CA.Car with 305 CU.IN.

Joined: 3/21/2006
Posts: 238

 



____________________________________

(click to see a larger version)


 Reply Reply  Quote Reply w/Quote
3/22/10 5:34pm - Reply: 'Quadrajet replacement options?'
dskopp
Former Member
- Send Private Message


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
nosal1 !  What is it you wanted to say?????
Dan


____________________________________
          



(click to see a larger image)
 Reply Reply  Quote Reply w/Quote
3/22/10 6:06pm - Reply: 'Quadrajet replacement options?'
nosal1 Gold Member
Gold Member
- Send Private Message


Dunedin, FL - USA

Vette(s):
1980 Corvette Torch Red with Gold metallic 370HP/350 CU.IN.Turbo 350 w/shift kit.Originally CA.Car with 305 CU.IN.

Joined: 3/21/2006
Posts: 238
Sorry Guys,
                I hit the wrong switch and it went off in my hands..It was a few comments on replacing my Q-Jet with Edelbrock carb.
                I resorted to sending message directly to Adam and he may possibly send it to this forum.
                 In short I have substituted many Q-Jets to Edelbrocks with a great deal of success and increased the performance/operation of the engines,however the gas mileage differs quite a bit and should be considered as the Eddy's are not what you would call an asset as far as MPG as the Q-Jets...The small primaries of the Q-Jet help the mileage as long as you don't go into and stay in the secondaries,the go fast mode.....
                 Again, I apologize for my ineptness on the computer.. 
                 Have a great day all.............
   nosal1


____________________________________

(click to see a larger version)


 Reply Reply  Quote Reply w/Quote
4/7/10 3:25pm - Reply: 'Quadrajet replacement options?'
KDADDY79
Former Member
- Send Private Message


Dutchess County, NY - USA

Vette(s):
White '79 Corvette. It's a driver.

Joined: 8/27/2007
Posts: 2484

Adam,

Were you able to test it out on a good long ride?

 



____________________________________
 Reply Reply  Quote Reply w/Quote
4/7/10 3:38pm - Reply: 'Quadrajet replacement options?'
Adam Wartell Lifetime Member
Lifetime Member
C3VR Founder
- Send Private Message


Eagleville, PA - USA

Vette(s):
Used to own a 1979 Corvette now owned by JB79

Joined: 11/1/2001
Posts: 14712
[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 (Join C3VR on facebook)
C4 Vette Registry, C6 Vette Registry
C7 Vette Registry
Corvettes for a Cure

My first Vette, now owned by JB79:

 Reply Reply  Quote Reply w/Quote
4/8/10 9:06am - Reply: 'Quadrajet replacement options?'
Adams' Apple Lifetime Member
Lifetime Member
Moderator
- Send Private Message


Duncanville, TX - USA

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

Joined: 11/8/2003
Posts: 19457
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' Apple2010-04-08 07:07:42

____________________________________
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"
 Reply Reply  Quote Reply w/Quote
4/9/10 12:21am - Reply: 'Quadrajet replacement options?'
kstyer Lifetime Member
Lifetime Member
Moderator
- Send Private Message


CUYAHOGA FALLS, OH - USA

Vette(s):
1975 C3 Red, T-Tops, Black Interior. All I need is time and money! Getting there!

Joined: 12/2/2003
Posts: 6410
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.


____________________________________
On the "Tail of the Dragon"
(some day, no strike that, October 2008 it turned red, still in progress!)

(click either image to see a bigger version)
 Reply Reply  Quote Reply w/Quote
4/9/10 10:45am - Reply: 'Quadrajet replacement options?'
philip
Former Member
- Send Private Message


Marana, AZ - USA

Vette(s):
1982 Silver Blue

Joined: 4/8/2010
Posts: 104
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' Apple2010-04-09 10:16:16

____________________________________
1977 Nova 1982 Corvette   

The Toy Box
 Reply Reply  Quote Reply w/Quote
4/9/10 6:11pm - Reply: 'Quadrajet replacement options?'
cthulhu Lifetime Member
Lifetime Member
- Send Private Message


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
Posts: 3194
[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...


____________________________________
http://www.vetteprojects.com/bmv
 Reply Reply  Quote Reply w/Quote
 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page 1 2 3 [4]  
 Forums -> C3 Fuel, Emission Control, and Exhaust Systems
(Moderator: Adam Wartell, Norsky, Adams' Apple, kstyer)
 

 
Official C3 Vette Registry Community:
Home | Forums | Email | Who's Online | Clubs | Events | Member Stats

Other Official C3 Vette Registry Areas:
Members | Research | Shop | My Account | About C3VR
 

Corvette is a registered trademark of the General Motors Corporation(GM) & Chevrolet Motor Division. Vette Registries, LLC is responsible for all site content (except for member submitted content or where otherwise noted) and does not claim or imply that Chevrolet or GM is responsible for Official C3 Vette Registry content. Vette Registries, LLC is independent from GM and is not affiliated with, sponsored or supported by GM.  Copyright/trademark/sales mark infringements are not intended, or implied and are in fact used to support GM, Chevrolet and Corvette

Official C3 Vette Registry content is Copyright 2001-2017, Vette Registries, LLC. Content may not be reused without written consent. All Rights Reserved. NS

Corvette (Vette) Model Years on this site: 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 30