Carb suggestions??
Thread Starter
Navigator
Joined: Jul 2010
Posts: 9
Likes: 0
Carb suggestions??
I have a 1979 Corvette that I recently rebuilt the engine on and am looking for carburetor recommendations because I am unsure of what would be a good match.
New engine parts:
Edelbrock Performer RPM Heads - 64cc
Edelbrock Performer RPM Cam - Duration 308/318, Lift .488/.510
Hydraulic Lifters
Edelbrock Performer Intake
1.5 Roller Rockers
KB Pistons
ARP Rods and Bolts
Hooker SuperComp. Sidemount Headers
I guess I am wondering what size/type of carburetor I should get. I am currently running the stock Q-Jet to get the car running and work out some of the smaller problems
Any help is greatly appreciated!!
New engine parts:
Edelbrock Performer RPM Heads - 64cc
Edelbrock Performer RPM Cam - Duration 308/318, Lift .488/.510
Hydraulic Lifters
Edelbrock Performer Intake
1.5 Roller Rockers
KB Pistons
ARP Rods and Bolts
Hooker SuperComp. Sidemount Headers
I guess I am wondering what size/type of carburetor I should get. I am currently running the stock Q-Jet to get the car running and work out some of the smaller problems
Any help is greatly appreciated!!
Melting Slicks
Joined: Oct 2002
Posts: 2,314
Likes: 111
From: St Louis MO
You've already got the best carb - the Quadrajet!
Do some reading about it and fix it. Lars has a lot of good information; Cliff Ruggles and Doug Roe have good books about this carb.
__________________
1978 Corvette
406 SBC AFR heads Lunati roller Quadrajet TH-350 3.08
11.59 sec / 118.9 mph 1/4 mile
Do some reading about it and fix it. Lars has a lot of good information; Cliff Ruggles and Doug Roe have good books about this carb.
__________________
1978 Corvette
406 SBC AFR heads Lunati roller Quadrajet TH-350 3.08
11.59 sec / 118.9 mph 1/4 mile
Instructor
Joined: Mar 2010
Posts: 102
Likes: 0
From: Livingston TN
i agree. quadrajet is by far the best of both worlds. with its small primaries it can get decent gas milage and with large secondaries open it will make use of the power youve got.
but.... if you want simplicity of tuning and rebuilding, the edelbrock performer series carbs cant be beat
but.... if you want simplicity of tuning and rebuilding, the edelbrock performer series carbs cant be beat
Racer
Joined: Mar 2001
Posts: 272
Likes: 3
From: Marion Ia
Holy war warning!!
I really like my Holley 670 Street Avanger. It was very easy to tune following the directions on the included CD. Not saying the QJet is not a good carb it is, but it is not user friendly as they say.
I really like my Holley 670 Street Avanger. It was very easy to tune following the directions on the included CD. Not saying the QJet is not a good carb it is, but it is not user friendly as they say.
Thread Starter
Navigator
Joined: Jul 2010
Posts: 9
Likes: 0
Tuning
The tuning is exactly what I am scared of because I do not have a great understanding of the many different changest that can be, and need to be made to the Q-Jet.
I was actually looking at picking up at Holley DP 670 Street Avenger from a friend who only used it for about 2 hours. Would this be a good match? Too much maybe?
Thanks for all the help
I was actually looking at picking up at Holley DP 670 Street Avenger from a friend who only used it for about 2 hours. Would this be a good match? Too much maybe?
Thanks for all the help
Drifting
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
Are you sure about the 'DP' part? Holley doesnt list any Street Avenger double pumpers on their web site. They are all vacuum secondary carbs.
Melting Slicks
Joined: Apr 1999
Posts: 2,010
Likes: 3
From: Moon Twp. PA USA
I have a 1979 Corvette that I recently rebuilt the engine on and am looking for carburetor recommendations because I am unsure of what would be a good match.
New engine parts:
Edelbrock Performer RPM Heads - 64cc
Edelbrock Performer RPM Cam - Duration 308/318, Lift .488/.510
Hydraulic Lifters
Edelbrock Performer Intake
1.5 Roller Rockers
KB Pistons
ARP Rods and Bolts
Hooker SuperComp. Sidemount Headers
I guess I am wondering what size/type of carburetor I should get. I am currently running the stock Q-Jet to get the car running and work out some of the smaller problems
Any help is greatly appreciated!!
New engine parts:
Edelbrock Performer RPM Heads - 64cc
Edelbrock Performer RPM Cam - Duration 308/318, Lift .488/.510
Hydraulic Lifters
Edelbrock Performer Intake
1.5 Roller Rockers
KB Pistons
ARP Rods and Bolts
Hooker SuperComp. Sidemount Headers
I guess I am wondering what size/type of carburetor I should get. I am currently running the stock Q-Jet to get the car running and work out some of the smaller problems
Any help is greatly appreciated!!
What is your static CR? I believe CC recommends at least 10.00 CR.
I believe you would be better served using a Performer RPM intake.
I am using the stock Q-Jet, that was rebuilt by someone who knows what they are doing. I love that carb! Runs smooth as FI.
My mods are in my signature.
Burning Brakes
Joined: Dec 2005
Posts: 992
Likes: 56
From: Baldwinsville, NY
I am using the Q-Jet and it was not working 100% untill I checked to see if the secondaries were opening completely. Had someone push the gas pedle down and adjusted the linkage till I had 100%. Now the carb works great, what a feeling!
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Racer
Joined: Mar 2001
Posts: 272
Likes: 3
From: Marion Ia
The tuning is exactly what I am scared of because I do not have a great understanding of the many different changest that can be, and need to be made to the Q-Jet.
I was actually looking at picking up at Holley DP 670 Street Avenger from a friend who only used it for about 2 hours. Would this be a good match? Too much maybe?
Thanks for all the help
I was actually looking at picking up at Holley DP 670 Street Avenger from a friend who only used it for about 2 hours. Would this be a good match? Too much maybe?
Thanks for all the help
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
I have a 1979 Corvette that I recently rebuilt the engine on and am looking for carburetor recommendations because I am unsure of what would be a good match.
New engine parts:
Edelbrock Performer RPM Heads - 64cc
Edelbrock Performer RPM Cam - Duration 308/318, Lift .488/.510
Hydraulic Lifters
Edelbrock Performer Intake
1.5 Roller Rockers
KB Pistons
ARP Rods and Bolts
Hooker SuperComp. Sidemount Headers
I guess I am wondering what size/type of carburetor I should get. I am currently running the stock Q-Jet to get the car running and work out some of the smaller problems
Any help is greatly appreciated!!
New engine parts:
Edelbrock Performer RPM Heads - 64cc
Edelbrock Performer RPM Cam - Duration 308/318, Lift .488/.510
Hydraulic Lifters
Edelbrock Performer Intake
1.5 Roller Rockers
KB Pistons
ARP Rods and Bolts
Hooker SuperComp. Sidemount Headers
I guess I am wondering what size/type of carburetor I should get. I am currently running the stock Q-Jet to get the car running and work out some of the smaller problems
Any help is greatly appreciated!!
Edelbrock #7102, 234/244 .050, 112 LSA. You picked a high rpm range to run in. The performer manifold is wrong for this rpm range. Not much sense in improving airflow in your heads, running a high rpm range cam then strangle it off with a small carb and the wrong intake. I hope you have a lot of compression wide 112 LSA, high duration will need it.
Instructor
Joined: Jun 2010
Posts: 199
Likes: 0
Edelbrock #7102, 234/244 .050, 112 LSA. You picked a high rpm range to run in. The performer manifold is wrong for this rpm range. Not much sense in improving airflow in your heads, running a high rpm range cam then strangle it off with a small carb and the wrong intake. I hope you have a lot of compression wide 112 LSA, high duration will need it.
That is a all matched edelbrock set-up its one of thier performer power packages i have installed quite a few of those for a few friends its edelbrocks bolt on power. the 308/318 cam works good with that if it didn't then edelbrock better go back to the drawning board.
the few that i have done for friend the stock Q-jet in its stock form has more then enough to feed that.
i personally like the just plain performer package keeps the motor running stock RPM range. that's the performer RPM package which winds out the motor another grand or so. and changes its HP and torque curve to the higher end.
would personally suggest if thats a 2 bolt main to beefin up the bottom end to hold another grand+ of RPM's and a forged crank
Racer
Joined: Jun 2006
Posts: 476
Likes: 0
From: Easton PA
did someone say q-jet! would recomend staying with what you got, have someone tune the carb in with a wideband and it will run better than any carb out there. wait im running the edelbrock rpm package 2,kb pistons, hooker super comp headers e tec heads, airgap intake, close to what you have anyway. my qjet works fine on my engine
Last edited by straub18045; Jul 22, 2010 at 08:51 AM.
Thread Starter
Navigator
Joined: Jul 2010
Posts: 9
Likes: 0
Thanks for all of the input. I have been having trouble with my secondaries and it turns out (sorry for not knowing the names of parts here) my carb is missing the part that releases the pin on the secondaries so they are not opening up at all.
I have no idea where I could get ahold of one of these. With that beings said, if I could get the part I would like to stick with the Q-Jet and have someone help me tune it. Any idea where i can find parts for it?
Thanks again!
I have no idea where I could get ahold of one of these. With that beings said, if I could get the part I would like to stick with the Q-Jet and have someone help me tune it. Any idea where i can find parts for it?
Thanks again!
Pro
Joined: Jan 2010
Posts: 533
Likes: 18
From: Boca Raton Florida
Without a picture it's hard to tell which link you are talking about but perhaps it's the "Choke Pull-off link - 1975 and Later." Cliff's Performance sells it for $8 (including shipping). That's Cliff Riggles website and he's one of the experts mentioned in an earlier post -- he wrote a really good book on Quadrajets.
http://www.cliffshighperformance.com/parts.html#a
http://www.cliffshighperformance.com/parts.html#a
Thread Starter
Navigator
Joined: Jul 2010
Posts: 9
Likes: 0
I will post a picture of the carb later today. I believe it is missing the choke pull off, the choke pull off link/rod, and the AV Spring components.
The way it is right now there is no linkeage to open the top of the secondaries (choke pull off linkeage?). Also, the pin that goes through the rod that opens the bottom of the secondaries is held closed by a smaller spinning arm that opens when needed, but that arm has nothing connected to it to open it.
Sorry, I dont know much of anything about carbs which is why I am a bit worried about this. I will post pictures later and try to explain better.
My other option is to pick up a Holley 670 Street Avenger from someone I know for $125. He only used it for a few hours and got a bigger carb for his 1980 Corvette with a 383 and NOS Setup. Would this be a bad option for me?
Thanks!
The way it is right now there is no linkeage to open the top of the secondaries (choke pull off linkeage?). Also, the pin that goes through the rod that opens the bottom of the secondaries is held closed by a smaller spinning arm that opens when needed, but that arm has nothing connected to it to open it.
Sorry, I dont know much of anything about carbs which is why I am a bit worried about this. I will post pictures later and try to explain better.
My other option is to pick up a Holley 670 Street Avenger from someone I know for $125. He only used it for a few hours and got a bigger carb for his 1980 Corvette with a 383 and NOS Setup. Would this be a bad option for me?
Thanks!
Racer
Joined: Jun 2006
Posts: 476
Likes: 0
From: Easton PA
not sure if it would be a 'bad option for you' but any carb you put on your engine should be set up for your particular combination, because it worked great on another engine doesnt mean it will work on your engine, just keep that in mind
Pro
Joined: Nov 2007
Posts: 710
Likes: 0
From: Northern Florida
I have a 1979 Corvette that I recently rebuilt the engine on and am looking for carburetor recommendations because I am unsure of what would be a good match.
New engine parts:
Edelbrock Performer RPM Heads - 64cc
Edelbrock Performer RPM Cam - Duration 308/318, Lift .488/.510
Hydraulic Lifters
Edelbrock Performer Intake
1.5 Roller Rockers
KB Pistons
ARP Rods and Bolts
Hooker SuperComp. Sidemount Headers
I guess I am wondering what size/type of carburetor I should get. I am currently running the stock Q-Jet to get the car running and work out some of the smaller problems
Any help is greatly appreciated!!
New engine parts:
Edelbrock Performer RPM Heads - 64cc
Edelbrock Performer RPM Cam - Duration 308/318, Lift .488/.510
Hydraulic Lifters
Edelbrock Performer Intake
1.5 Roller Rockers
KB Pistons
ARP Rods and Bolts
Hooker SuperComp. Sidemount Headers
I guess I am wondering what size/type of carburetor I should get. I am currently running the stock Q-Jet to get the car running and work out some of the smaller problems
Any help is greatly appreciated!!
Drifting
Joined: Jun 2010
Posts: 1,781
Likes: 15
From: Oxford Ohio
Buy them both, try them, keep the one you like the best and sell the other. A small loss for a short run carb, but not much. There is often a cost in gaining knowledge. Someone here will buy your other carb.
Both run well or they wouldn't have been around for so long. I like and use them both, they both can be tuned to about any level.
This question often is a personal preferance situation. There will be success and failure stories on both sides.
Both run well or they wouldn't have been around for so long. I like and use them both, they both can be tuned to about any level.
This question often is a personal preferance situation. There will be success and failure stories on both sides.
Advanced
Joined: Mar 2007
Posts: 90
Likes: 3
From: Warren MI
Holley 670 Street Avenger
I put a 670 Street Avenger on my friends stock ZZ4 700/R4 combo in a 1967 Impala Conv, with header. Carb runs great right out of the box, no adjustment done at all other than idle. Car also gets good gas mileage.
MAx
MAx
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
That is a all matched edelbrock set-up its one of thier performer power packages i have installed quite a few of those for a few friends its edelbrocks bolt on power. the 308/318 cam works good with that if it didn't then edelbrock better go back to the drawning board.
the few that i have done for friend the stock Q-jet in its stock form has more then enough to feed that.
i personally like the just plain performer package keeps the motor running stock RPM range. that's the performer RPM package which winds out the motor another grand or so. and changes its HP and torque curve to the higher end.
would personally suggest if thats a 2 bolt main to beefin up the bottom end to hold another grand+ of RPM's and a forged crank
the few that i have done for friend the stock Q-jet in its stock form has more then enough to feed that.
i personally like the just plain performer package keeps the motor running stock RPM range. that's the performer RPM package which winds out the motor another grand or so. and changes its HP and torque curve to the higher end.
would personally suggest if thats a 2 bolt main to beefin up the bottom end to hold another grand+ of RPM's and a forged crank
increase the airflow capability with better airflow heads a cam with so much duration its doing its work at nothing but midrange/higher rpm.
Then slap on a restricted manifold and smaller carb. The whole point of installing aftermarket heads ( better airflow ) Different cams ( again increasing airflow) then slap on a smaller airflow carb, makes no sense.
To the OP if you have just made up your mind to use this cam use a manifold and carb to match your combination.
