Corvette C3 Forum 1968 through 1982

Need some carb help

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  #21  
Old 03-31-2008, 10:17 PM
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Default RE: Need some carb help

Hi again, the weatherstripping replacement is not a hard job, just get some 3M general purpose adhesive cleaner (at the auto parts or paint store) and have some patients getting all the old stuff off.
Just cover the seats and carpet with something like a old towel, and get black adhesive to put the new weatherstripping on with.

I have a fixed antena so someone else will answer that.
Have fun and enjoy your ride, PG.
 
  #22  
Old 04-01-2008, 12:12 PM
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Default RE: Need some carb help

One other thing about the weather spripping, tape it in place dry then apply the adhesive, that way it won't be an inch too long when you get to the end of the door. PG.
 
  #23  
Old 04-02-2008, 12:13 AM
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Default RE: Need some carb help

If you are thinking about replacing your carb here is a pretty neat website thats greatif you dontknow what size would workbest for your car.
http://www.holley.com/applications/C...bSelection.asp
hope it helps
 
  #24  
Old 04-13-2008, 10:30 PM
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Default RE: Need some carb help

Like 73shark says:
You can get away with a somewhat oversize carb if it has vacuum secondaries.
And like Lar's says in one of his papers:
Most Q-Jets are 750 cfm carbs. This is more airflow than most small block engines can ever handle. Yet, GM used Q-Jets on everything........ The secondary airvalve on the Q-Jet effectively makes the Q-Jet a variable-cfm carb.
Many Edelbrock carbs are Rochester Q-Jets knock-offs with a few improvements, and this is quite possibly what you have. If so, you should be able to keep it, and just make the necessary adjustments.
 
  #25  
Old 04-14-2008, 09:16 AM
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Default RE: Need some carb help

Stay away from any new Holley carb. They are junk. The quality that previsouly went into Holley carbs is gone. I have had two brand new ones in 12 months and they were both junk. Both made the car sputter, burp, jerk, jump and flat spot. The first one was a 575 and the second was a 650. Both were Street Avengers. I retuned the accelerator pump the vacuum secondary spring, rejetted both of them and still each of them gave me nothing but fits. I was beginning to think that I had a vacuum leak somewhere else on the car. I plugged all of the vacuum accessories and still no improvement. I finally got sick of fighting with the Holleys and installed a 625 Road Demon. By god, it was the Holleys. Right out of the box, the only thing that I did was set the four corner idle, adjusted the electric choke and set the idle at 700 RPM. The car now runs perfect. That being said I have a 750 Holley on the wifes 69 Camaro that has been on there since 2000 and it still runs perfect.
 
  #26  
Old 04-16-2008, 01:19 PM
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Default RE: Need some carb help

Hey guys, thanks for the info. I havent checked the forums in a while. Been really busy catching up with my school work and getting a speeding ticket [:@](it wasnt in the corvette though) but anyways, thanks for the congrats PG and also i do haveheaders and i beleive the gears are still stock which if i remember correctly are 2.87 or somewhere in that area. I am not sure what the stall speed is at all. Your guess would be better then mine. I'll do some research. I'm not sure of what my intake is... The guy before me said torker 2 but i got the car out the other day and spent 8 hours buffing and waxing it and remembered to take a look at it andi dont think he was right... I think im going to take a look and see if i can find any numbers on the intake and track down what im dealing with. Would someone be kind enough to fill me in on what the advantages and disadvantages of a dual/single plane intake are?
 
  #27  
Old 04-16-2008, 08:02 PM
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Default RE: Need some carb help

I have an Edelbrock manifold and carb. I tried retuning my idle again last night. Works like a charm again. I still would like to know what happened, but damn does it sound beautiful. [8D]
 
  #28  
Old 04-16-2008, 10:31 PM
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Default RE: Need some carb help

Sweetness224: Single plane manifolds are better suited for racing where the engine is operating in the upper rpm range. Dual plane manifolds work a lot better for street driven cars, better low end torque, mpg, and just more streetable.
 
  #29  
Old 04-17-2008, 06:44 AM
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Default RE: Need some carb help

Thansk 73Shark, for the info there
 
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