New carb
Thread Starter
Cruising
Joined: Nov 2014
Posts: 13
Likes: 0
From: Belfast Maine
New carb
Guys,
I looked back on past post but couldn't find what I was looking for so here goes. I am putting a new Holley Street Avenger carb on my 79 L82. I want to leave the stock intake on for now. The new carb needs an adapter plate to convert to square bore which I now have both carb and plate but I am not sure if it will fit under the stock L82 hood. I have found that with the electric choke I can only use a 7/8 drop base air cleaner. Will this combo fit under this hood. I am also thinking of putting an L88 scoop on. Any past experience anyone has would be a help. Thanks
I looked back on past post but couldn't find what I was looking for so here goes. I am putting a new Holley Street Avenger carb on my 79 L82. I want to leave the stock intake on for now. The new carb needs an adapter plate to convert to square bore which I now have both carb and plate but I am not sure if it will fit under the stock L82 hood. I have found that with the electric choke I can only use a 7/8 drop base air cleaner. Will this combo fit under this hood. I am also thinking of putting an L88 scoop on. Any past experience anyone has would be a help. Thanks
Burning Brakes
Joined: Oct 2001
Posts: 911
Likes: 5
From: TN
carb bought
Guys,
I looked back on past post but couldn't find what I was looking for so here goes. I am putting a new Holley Street Avenger carb on my 79 L82. I want to leave the stock intake on for now. The new carb needs an adapter plate to convert to square bore which I now have both carb and plate but I am not sure if it will fit under the stock L82 hood. I have found that with the electric choke I can only use a 7/8 drop base air cleaner. Will this combo fit under this hood. I am also thinking of putting an L88 scoop on. Any past experience anyone has would be a help. Thanks
I looked back on past post but couldn't find what I was looking for so here goes. I am putting a new Holley Street Avenger carb on my 79 L82. I want to leave the stock intake on for now. The new carb needs an adapter plate to convert to square bore which I now have both carb and plate but I am not sure if it will fit under the stock L82 hood. I have found that with the electric choke I can only use a 7/8 drop base air cleaner. Will this combo fit under this hood. I am also thinking of putting an L88 scoop on. Any past experience anyone has would be a help. Thanks
Thread Starter
Cruising
Joined: Nov 2014
Posts: 13
Likes: 0
From: Belfast Maine
new carb
One of my friends has 3 corvettes and has put holley carbs on each one and has noticed a great improvements with his cars. I have great confidence in his ability. All of his are under high rise hoods though which mine doesn't have. This guy has no faith in Q-jets but after riding in his and then mine I thought that it might be just the trick for mine.
Thread Starter
Cruising
Joined: Nov 2014
Posts: 13
Likes: 0
From: Belfast Maine
In my previous post I commented on Q-jet carbs as described to me by a really good friend who has had them for many years. I am not trying to start a debate. I am trying to tap into the experience on many of you who have way more knowledge than I so please don't take this the wrong way as I am looking to gather info to make a better decision. Thank you
Race Director
Joined: May 2006
Posts: 18,784
Likes: 2,598
No debate here, I have an old Holley 3310-1. The difference is I dont use an adaptor, have an Edelbrock RPM Air Gap and an L-88 Hood. Just cannt see you going through this change without doing it correctly. Since it sounds you have already purchased everything can you measure your current hood clearance with some soft modeling clay and judge from that?
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Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
One of my friends has 3 corvettes and has put holley carbs on each one and has noticed a great improvements with his cars. I have great confidence in his ability. All of his are under high rise hoods though which mine doesn't have. This guy has no faith in Q-jets but after riding in his and then mine I thought that it might be just the trick for mine.
Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
Most of my friends who drove the hell out of Holleys say my car drives like it's fuel-injected.
It's not, and I don't think it feels that way, but I have very little incentive to switch out my very well running Q-Jet (my combo made 450hp/484tq on an engine dyno) for a Holley.
It's not, and I don't think it feels that way, but I have very little incentive to switch out my very well running Q-Jet (my combo made 450hp/484tq on an engine dyno) for a Holley.
Melting Slicks
Joined: Apr 2006
Posts: 2,084
Likes: 14
From: Airdrie Alberta
I went with a Quick Fuel 750 cfm carb on mine...I used the Edelbrock adapter plate pn 2732
http://www.edelbrock.com/automotive/mc/install-items/
I didn't feel like screwing around with a 40 year old Qjet, the quick fuel has screw in jets and air bleeds, nice unit
http://www.edelbrock.com/automotive/mc/install-items/
I didn't feel like screwing around with a 40 year old Qjet, the quick fuel has screw in jets and air bleeds, nice unit
Le Mans Master
Joined: Jan 2000
Posts: 8,721
Likes: 108
From: Canada
I wuld send your QJet to Lars, havevhim go through and let you know what is required. Ask him for his tuning papers as well. If you are hell bent on a Holley he'll suggest one that will work very well with your combination and what jets to use.
Burning Brakes
Joined: Nov 2012
Posts: 788
Likes: 100
From: Indianapolis IN
I'll second what the others are saying about a good Qjet. But at the very least go buy a good used performer squarebore intake, (they're everywhere ), or use a spreadbore holley on your intake.
Set an adapter on top of your stock intake and see the mismatch of where the throttle plates will be positioned !
Set an adapter on top of your stock intake and see the mismatch of where the throttle plates will be positioned !
Le Mans Master
Joined: Oct 2007
Posts: 7,474
Likes: 990
From: RI, Now Franklin/Nashville TN
Lots of folks like the Qjet. They are great as long as they run correctly but can be problematic since they are overly complicated for what a carb needs to do-GM's attempt at precisely metering fuel through a carb. GM stuck with the Qjet for way too long when others switched to mechanical/eletronic fuel injection. I have used a Holley 4175 650 CFM vacuum secondary Q jet replacement with the stock L-82 aluminum intake for 30 years. Carb has been perfect...
Last edited by jb78L-82; Jan 15, 2015 at 02:08 PM.
Burning Brakes
Joined: Oct 2011
Posts: 956
Likes: 86
From: McDonough Georgia
You are correct, the Q junk is an old, obsolete, used out, not made anymore, non performance piece of crap.
Simply measure how how high the Q junk and base are. Then measure the Holley and the adaptor plate and see what the difference is.
It looks to me like the adapter is between .75 and .87 high. Or 3/4 to 15/16ths or so.
http://www.summitracing.com/search?k...bore%20adapter
I don't believe you will have an issue. But it doesn't hurt to check. You can lay a ball of play doe or clay, or silly sand, or something like that on top of your air cleaner and close the hood to measure your clearance.
Good choice on the Street Avenger. Excellent carb. You will enjoy much better performance.
You may need to change to a manual kick down and get rid of the smog computer.
Simply measure how how high the Q junk and base are. Then measure the Holley and the adaptor plate and see what the difference is.
It looks to me like the adapter is between .75 and .87 high. Or 3/4 to 15/16ths or so.
http://www.summitracing.com/search?k...bore%20adapter
I don't believe you will have an issue. But it doesn't hurt to check. You can lay a ball of play doe or clay, or silly sand, or something like that on top of your air cleaner and close the hood to measure your clearance.
Good choice on the Street Avenger. Excellent carb. You will enjoy much better performance.
You may need to change to a manual kick down and get rid of the smog computer.
Tech Contributor
Joined: Aug 1999
Posts: 14,385
Likes: 6,413
From: At my Bar drinking and wrenching in Lafayette Colorado
Gordon -
Where have you been..?
There's no smog computer on a '79. Holley carbs can be easily fitted with the lower stud to make the TH350 kickdown cable work - you just have to install one of the many available aftermarket throttle cable brackets.
Seacoot -
Please send me that old, obsolete, used out, not made anymore, non performance piece of crap Q-Jet when you pull it off. It's one of the 800 cfm high performance carbs that will easily support 550 horsepower. It's no good for you. That little 670 Street Avenger is just the ticket... fer shure. I will pay shipping. Please e-mail me for my shipping address.
Lars
V8FastCars@msn.com
Where have you been..?
There's no smog computer on a '79. Holley carbs can be easily fitted with the lower stud to make the TH350 kickdown cable work - you just have to install one of the many available aftermarket throttle cable brackets.
Seacoot -
Please send me that old, obsolete, used out, not made anymore, non performance piece of crap Q-Jet when you pull it off. It's one of the 800 cfm high performance carbs that will easily support 550 horsepower. It's no good for you. That little 670 Street Avenger is just the ticket... fer shure. I will pay shipping. Please e-mail me for my shipping address.
Lars
V8FastCars@msn.com
Last edited by lars; Jan 17, 2015 at 12:30 AM.
Thread Starter
Cruising
Joined: Nov 2014
Posts: 13
Likes: 0
From: Belfast Maine
New Carb
When I signed on to this forum I had done a lot of reading here first. I was hoping that it would be fun and great place to learn. Also an opportunity to bounce ideas that others in my area are sharing with me to get a sense of what will or will not work. I did not expect a sarcastic response like the one from Lars. This is no place for me. I am sure there are other places with people that don't act like Idots as Lars does. Signing off
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
This man is right on the money
Theres some nice Holley based stuff out now but with the cost/space issues I honestly feel youre going backward$ here.
Last edited by cv67; Jan 17, 2015 at 10:47 AM.
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
When I signed on to this forum I had done a lot of reading here first. I was hoping that it would be fun and great place to learn. Also an opportunity to bounce ideas that others in my area are sharing with me to get a sense of what will or will not work. I did not expect a sarcastic response like the one from Lars. This is no place for me. I am sure there are other places with people that don't act like Idots as Lars does. Signing off
Tech Contributor
Joined: Aug 1999
Posts: 14,385
Likes: 6,413
From: At my Bar drinking and wrenching in Lafayette Colorado
When I signed on to this forum I had done a lot of reading here first. I was hoping that it would be fun and great place to learn. Also an opportunity to bounce ideas that others in my area are sharing with me to get a sense of what will or will not work. I did not expect a sarcastic response like the one from Lars. This is no place for me. I am sure there are other places with people that don't act like Idots as Lars does. Signing off
Lars