c4 corvette motor with 2/4b carbs
Thread Starter
Teching In
Joined: Oct 2005
Posts: 2
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c4 corvette motor with 2/4b carbs i have a 1988 corvette from GM that came with 11 to1 pistons 580 lift at 106 l hi flow heads and dual quads this is a stock limited corvette only built 6 i was told by GM but the problem i need help on is how to set the carbs i have taken it to chevy and not one mchanic can help me with this problem GM has the ID# of this car and said that if i sent the car to them that they would set the car up for me but before i do that maybe some one can tell me how to do it thank you 
Launching!
Joined: Sep 2004
Posts: 248
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From: Honolulu-Hi
You should be able to find a card synchronizer at a speed shop.
But i have to throw up the B.S. flag about that being a factory car.Without OBD-1 ,EFI,it would have to have it's own smog,gas guzzler tax and a ton of other testing just to sell on the street.That would cost GM a ton of money and test time.Throw the VIN number up there.
But i have to throw up the B.S. flag about that being a factory car.Without OBD-1 ,EFI,it would have to have it's own smog,gas guzzler tax and a ton of other testing just to sell on the street.That would cost GM a ton of money and test time.Throw the VIN number up there.
Last edited by H-5-L; Nov 1, 2005 at 09:29 AM.
First, check your fuel pressure and how much is it? Secondly, an easy but sometimes difficult way to check how rich or lean a car runs is to look at the spark plugs. Pull a plug from the front cylinder passenger side (#1) and pull another from the same side of the motor in the last cylinder (#7). What do they look like?
After you determine how much fuel pressure and plug texture, you may want to dig into the carb and see what primary/secondary jets and power valves are in it. Are you confident enough to do this? You may even be able to skip this step but at least you know where your carbs stand. I would say if your plugs only look slightly black and your fuel pressure is at 6 or 7 lbs., then you might just be able to adjust the idle mixture.
If you drive the car a bit, make a few WOT runs and your plugs are still dark you may have to jet down.
After you determine how much fuel pressure and plug texture, you may want to dig into the carb and see what primary/secondary jets and power valves are in it. Are you confident enough to do this? You may even be able to skip this step but at least you know where your carbs stand. I would say if your plugs only look slightly black and your fuel pressure is at 6 or 7 lbs., then you might just be able to adjust the idle mixture.
If you drive the car a bit, make a few WOT runs and your plugs are still dark you may have to jet down.
