83 chevy camaro carb problems?

Yeah the Edlebrock carbs aren't the best in the world, With a 305 in it, you should stick with a 650cfm to 750cfm at the most, I wouldn't go over a stage 2 if you drive it everyday. I know there are people on here that will tell you to go with a Holley 850 double pumper or a Dominator or crazy carbs like that, don't listen to them. A 305 driven on the street is very easily over-carbourated. stay conservative and don't go overboard and you'll be ok.

Quadrojets are awsome carbs if you can find someone in your area that actually knows how to tune one, a lot of people claim they know, but they don't.

RE: over carbing the motor, If your drag racing on the strip, yeah, go for a 1100cfm carb and watch the black smoke billow out the motor and foul out your plugs every few passes. If your driving it on the street though, you want to stay conservative. Don't listen to backyard bench racers with three cars piled up in the yard on blocks with 1100cfm carbs on their cars waiting for their moment of fame on the drag strip. And your right in one aspect, GM didn't over carb their cars, they did use 750 and 800cfm carbsbecause they were the only ones available at that time from Rochester/Quadrojet, but they were restricted as hell, do your homework and check YOUR facts before spouting off and showing your a**

EDIT: How were they restricted? Needles and jets my friend, anyone that supposedly knows as much as you do about Quadrojets should know that there are about 20 different sizes of needles and jets to adjust the metering of fuel flow.

And if you knew anything about GM, you would know they were under contract with Rochester/quadrojet, and Ford was under contract with Holley during those years, that's why you didn't see GM using Holley, and didn't see Ford using Quadrojet. For the most part, there were a few exceptions as the contracts were running out in the early 80's as fuel injection was taking over. But as a general rule they didn't stirr things up too much. And while we are at it, this arguement is stupid anyway, for the carb in question would be an add on to this car, this car didn't come from the factory with a carb.

Well did you go from the stock CCC carb?

The edelbrock can't make the car run bad, there is something else going on.

Any Rochester Quad will fit, but you'll want one from a Chev. There are only two sizes, and that 305 isn't going to care which one you get. Both the 750 and 800CFM Q-jet variants were used on 305's.

Edit: no idea who came up with those engine displacement/maximum RPM CFM calculators, but they obviously started them in the 1950's. GM's engineers apparently overcarbed just about every muscle car they ever made with a 750 or 800CFM Quadrajet, and even in the emissions era were apparently SO stupid, they didn't know they were overcarbing the 305's, 350's, and 454's in use during the 80's. Give me a break.

Those CFM calculators are obviously not factoring in something crucial, whether it be the vacuum secondaries, technology, or what. Even modern dyno tests conducted by people such as David Vizard prove that it is hard to overcarb an engine, as long as it's not something like a mechanical secondary 1100CFM carb on a straight 6.

Base your decision on facts, not some hokey calculator that is OBVIOUSLY wrong. GM wasn't dumb enough to overcarb their vehicles more than 30%, ESPECIALLY in the 80's, when they were trying to achieve as much MPG as possible to meet emissions/mileage regulations.

Edit: "And your right in one aspect, GM didn't over carb their cars, they did use 750 and 800cfm carbsbecause they were the only ones available at that time from Rochester/Quadrojet, but they were restricted as hell, do your homework and check YOUR facts before spouting off and showing your a**"

How ignorant of a statement is that? So they couldn't use a Holley or Edelbrock, like Ford did? Oh wait, if you actually knew something, you'd know that GM indeed DID use them on occasion! Before you go running your mouth, you might want to make sure you pick an opponent who knows LESS than you do. In the absence of fact, it might just be best to be quiet and learn something, or at least take the opportunity to find things out for yourself that you don't think sound right.

As to them being restricted as hell, why don't you please explain how that was done? I've got 25 Quadrajets of just about every possible design hanging on my wall, I'd love to hear how they are restricted, and how if they are restricted, you know they are restricted down to the 450CFM the infallible calculators say they should flow, seeing as the primaries alone on the smallest Quadrajet were 250CFM. You expect us to believe that of the 500CFM available on the secondaries, GM restricted them to only 40% of possible airflow?

Talk bench racing all you want, I'll put David Vizard's studies against any trash you think you know.

First off is the timing correct?If it is then proceed to air fuel adjustments, start at 1 and 1/2 turns this will give you a rough starting point for fine tunning. This will work as long as the CFMs on the carb is not more than 750! If the problem still exsist try replacing the EDELBROCK with a HOLLEY 650cfm single pump and it should be just fine.The carb in question if it is over 750 cfm's is just to much carb. THE PROBLEM IS THAT IT CAN RESULT IN WASHING THE RINGS!!! TIME FOR A REBUILD!!! NOT GOOD!!! It is possible to have to big of a carb also what is the mileage of the motor? When was the last rebuild?

It's not cause of an edelbrock carb. I have been using the carter/edelbrock carbs for years on 450 HP and under builds.

In fact GM and Mopar used them on alot of performance builts. The old carter AFB carbs which was bought out be edelbrock (same carb)

I had one (edelbrock) on my 505 HP engine, running 11.40's @ 118 mph

Your prob is your tune. The dizzy was changed and truthfully most newbi backyarders can't set timing to save their lives.

I bet you, if I asked you what your timing was set at, you couldnt tell me. I bet you have never even put a timing light on the car.

Set your timing to 14* BTDC at idle with vac advance line un hooked.

Tune idle mixture screws to highest vac levels using a vac gauge hooked to full intake vac source.

Then I bet you will see a whole new animal

Rochester Quad.

need to return your junky edelbrock carb,there carbs are junk,and get a MSD 6A ignition system with the MSD distibutor,to do away with the computer controlled carb.and buy a holley 600 vac,sec. with electric chock can buy one from summitracing.com,

loved the Rochester 4bbl carb on my chevy

Yes, you could just bolt on a stock sized one, but to tell you the truth it would be wrong.

Try this link: http://www.summitracing.com/expertadvice/storydeta...