First corvette issues
Melting Slicks
Joined: Oct 2012
Posts: 2,156
Likes: 273
From: Dunedin NZ.
I apologies if this isn't the correct spot for this.
I just got a 79 l82 vette and it doesn't have much takeoff power . I've never had a corvette so maybe I expect more out of it than I should but it seems to run fine it has edelbrock carb and intake long tube headers and a 700r4 trans witch I think might be my problem it does have a slip in 3rd but I'm not sure if that would effect the takeoff. Do y'all have any input on this ?
Thanks Dan.
I just got a 79 l82 vette and it doesn't have much takeoff power . I've never had a corvette so maybe I expect more out of it than I should but it seems to run fine it has edelbrock carb and intake long tube headers and a 700r4 trans witch I think might be my problem it does have a slip in 3rd but I'm not sure if that would effect the takeoff. Do y'all have any input on this ?
Thanks Dan.
Melting Slicks
Joined: Mar 2008
Posts: 2,989
Likes: 198
From: Meriden CT
Well, you still don't know anything about them. Mines been on for 15 years with no corrosion issues. If you can't get something as simple as a Edelbrock carb to run right, you should have someone do it for you.
Melting Slicks
Joined: Mar 2008
Posts: 2,989
Likes: 198
From: Meriden CT
Thanks for all the imput its really appreciated. The timing is at 12° I'm thinking the engine isn't original to the car it's definitely been out and all the smog/ac has been removed .another thing if you just punch it from a dead stop it'll die not sure what's up with that either.this is the first chevy I've owned and probably 2nd carburetor vehicle I've had so it's all pretty new to me
Race Director
Joined: Feb 2006
Posts: 12,239
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From: Chino CA
Le Mans Master
Joined: Feb 1999
Posts: 8,351
Likes: 75
From: Tampa Bay FL
Totally agree, if you put in good pieces it could take a lot of abuse even for being a 10-bolt. The t-arm assemblies I heard can be a pain to replace, but completely worth it imo as well as half shafts which I plan on buying some after market ones. Idk whether to go with the Iron 3.0" Half shaft or the Aluminum 3.5" Haft Shaft. Even though the aluminum is thicker still worries me that it's aluminum. Any suggestions? I apologize for leaving the current subject of this thread. 
Blake
Blake
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Joined: May 2012
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Blake
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Melting Slicks
Joined: Sep 2004
Posts: 3,223
Likes: 666
From: Northeast
Burning Brakes
Joined: Sep 2006
Posts: 1,071
Likes: 86
From: Rotonda FL
You stated it has a 700r4 transmissoin. That is not stock and operates with a TV cable that mounts to your carb. Take it somewhere for them to test pressure and properly adjust your TV cable as necessary. An improperly adjusted TV cable can lead to transmission problems. Torqure converter stall speed could be causing your issues too. Perhaps a 3000 stall converter was installed during the transmission swap and your engine is stock. If you are looking for instant response from the throttle you need a lower stall converter. Just a few other things to check out.
The OP stated that it had an Edelbrock manifold, so obviously the cross fire has been replaced (and PROBABLY the distributor that supported the injection). You cannot assume anything about tis engine's internals, fuel system or ignition system. Before attempting changes, even tuning, the OP needs to determine 1) what fuel pump he has (is it the original in-tank FI pump and is the pressure properly regulated before it gets to the pump, 2) what carb he has on it, 3) what distributor he has on it (has it been changed to a standard 4 pin HEI? Does it have a vacuum advance that is properly connected and functioning?) 4) What is the timing? 5) Does the connection between the tranny's TV cable and the new carb actually work - does it give the proper signals to the tranny and do adjustments work as GM intended?
Melting Slicks
Joined: Mar 2008
Posts: 2,989
Likes: 198
From: Meriden CT
The 700R4 WAS stock for 82. It was the first year (along with cross fire injection) and it still needed a great deal of development by GM to become a reliable tranny.
The OP stated that it had an Edelbrock manifold, so obviously the cross fire has been replaced (and PROBABLY the distributor that supported the injection). You cannot assume anything about tis engine's internals, fuel system or ignition system. Before attempting changes, even tuning, the OP needs to determine 1) what fuel pump he has (is it the original in-tank FI pump and is the pressure properly regulated before it gets to the pump, 2) what carb he has on it, 3) what distributor he has on it (has it been changed to a standard 4 pin HEI? Does it have a vacuum advance that is properly connected and functioning?) 4) What is the timing? 5) Does the connection between the tranny's TV cable and the new carb actually work - does it give the proper signals to the tranny and do adjustments work as GM intended?
The OP stated that it had an Edelbrock manifold, so obviously the cross fire has been replaced (and PROBABLY the distributor that supported the injection). You cannot assume anything about tis engine's internals, fuel system or ignition system. Before attempting changes, even tuning, the OP needs to determine 1) what fuel pump he has (is it the original in-tank FI pump and is the pressure properly regulated before it gets to the pump, 2) what carb he has on it, 3) what distributor he has on it (has it been changed to a standard 4 pin HEI? Does it have a vacuum advance that is properly connected and functioning?) 4) What is the timing? 5) Does the connection between the tranny's TV cable and the new carb actually work - does it give the proper signals to the tranny and do adjustments work as GM intended?
Pro
Joined: Nov 2013
Posts: 730
Likes: 37
From: Catoosa Okla
People said the same thing about the Quadrajet, over and over again. I've rebuilt 100's of them. Once PROPERLY set up, they offer decent fuel mileage due to the small primaries and great power when the secondaries are set to come on properly. The Edelbrock design is similar, and offers a much more efficient idle circuit and main metering circuit. It's a much more efficient design than a Holley, when properly set up of course. Many toss a Holley on because they work. Every time. They just don't work EFFICIENTLY, and never will.
Advanced
Joined: Aug 2013
Posts: 83
Likes: 0
From: Morton Grove Illinois
Set up your TV cable properly and THEN check how the transmission runs. Without the TV cable hooked up, depending how much you drove it the damage could very well already be done. 700r4s NEED the TV cable hooked up right with the correct geometry or bad things will happen.