Thats OK everbody makes mistakes.When you looked under the hood did you notice if the carb. was stock or had it been replaced with an aftermarket?

 

Hmm. To tell the truth, I have no idea. Even worse, I couldn't tell you off the top of my head what a carburetor looks like. But, I think the guy said everything was stock. I remember him saying that they only replaced one thing. Brake pads, I think it was.

I really need to start boning up on car mechanics, because I sound like a total fool on these boards.

 

Well an 82 is an entirely different animal - It's got the "Crossfire" throttlebody injection system. It's also computer controlled but with a much upgraded CCC over the 81 (sample rate is up and the number of items sampled is higher). Some of the 82 guys are going to have to step in here, cause I'm an 81 guy like SIXFOOTER. But I would think that if you go to a performance exhaust shop and have them redo you exhaust system and change out the Catalytic converter to a high flow and better mufflers - get some with a little beef - like may the Flowmaster Force II's. They sound good. I've heard tuning a crossfire set up can be a bit of a pain but I'm only speaking from hear say. SO SOME OF YOU 82 GUYS STEP FORWARD AND HELP THIS MAN OUT!

 

Aight, so how about if I bought the stuff myself and had it installed in a shop?

I was looking and found this for exhaust/mufflers. How would that work?

I found this for the catalytic converter[/URL]. How would it work?

Now, would the mufflers included work? If not, would these work?

Thanks to anyone who can help out on this.

 

Linkie no workie

 

http://www.crossfire.homeip.net/cftest/this cite can help you ,82 should do well on mpgs it already has the overdrive trans,the cat has to be opened up or replaced .the 82 cats were verry restrictive .my intake has been ported the cat opened.i get 21-23 highway mpg .and i like to drive alittle over the speed limit to help keep the carbon blowed out [dont no if it helps but it is more fun]

 

First thing to do is fill out your profile (at least the state you live in) some states have very strict emissions laws and some performance parts can effect this in a big way.

I would also concentrate on finding a good solid Corvette before you even think about doing any performance upgrades.

I'm not trying to be a bad guy, but if you dont know what a carbeurator looks like then I think its best to have whatever Corvettes your interested in buying thoroughly inspected by a Corvette mechanic/Specialist or a knowledgeable forum member that lives close to where the car you want is located.
Looks don't mean everything when buying a C3, these cars require constant maintainance and a deep wallet to do things right.
Remember, an 82 Corvette is still an '82 Chevy.

 

Are you sure its not an 83............

The 82 like those above stated should be getting some good mileage.

 

Haha. Yeah, I double and triple checked this time.

For terry82, if I replace the cat and the exhaust system with ones that are good quality, about how much do you think that will raise the mpgs? By the way, I too like to drive a litle bit above the seed limit.

As I have said before, I am really only looking for stock performance, but with better fuel economy. So, the most mpgs I can get without overly modifying the car, the better. As such, I have also been advised that replacing the cam and the heads will also improve performance and economy.

 

Most of the same advice still applies. A good free breathing exhaust will help, but there is the issue of the Crossfire (some call it no fire) system. A Lot depends on that system working correctly. They are prone to throttle shaft leaks at the throttle shaft, low fuel pressure and some electrical bugs. They can be made to work well tho and net you around 20mpg

 

SIXFOOTER--do you know if the leaks can be fixed by myself, or if I would have to take it into a shop, or if they are just one of those problems that never goes away? As far as the others, what would you suggest?

 

I own an 82. If it is stock it is Crossfire injected. Fantastic cars if properly tuned. On the highway you should get 20+ miles per gallon. Crossfire can be tempermental and vaccum leaks are ususally the source of the temperment. The 82 is the first fuel injected vette since the 50's. They are a little harder to modify than other C3 vettes due to the slow computer but thay can be modifgied. Mild cam, Heads, Headers and exhaust. Also you can change the rear end gear but your mpg will get shot to hell...If this is going to be your daily driver, i would have a mechanic that knows crossfire look at it before you buy it to make sure it is in proper runing order.

 

It depends upon where the vaccum leak is. If its a hose or loose bolts then yes you can fix it yourself. If it is a throttle shaft then you will have to send the throttle bodies of to have them rebuilt and bushed. Turbo City in California will completely rebuild the throttle bodies for around $300. I am about to have this done after I swap rearend gears and have the rear bearings done.

Here is a link that will tell you how to tune the crossfire system. I am a novice mechanic myself but i do know what a carburator looks like. I read this article several times and bought a digital manometer and a good timing light. I went through the process twice untill I go it as close as i could. My car runs well after doing the tune up and balancing the throttle bodies. Once I have the TBI units rebuilt I should beable to tune it perfectly. (ie no leaks at the shafts)

http://www.corvettefever.com/techart...ing/index.html

You will probably have to copy and paste the link to your browser

As far as the low fuel pressure thing. The car operates between 12-15 psi of fuel pressure. some have replaced the 82 fule pump with an 85 fuel pump to boos t pressure. When my fuel pump went out I replaced it with an 82-84 fuel pump and it works just fine. If you modify the car you may want to replace it with an 85 pump. The process takes about an hour. While you have the sending unit out of the tank you might want to go ahead and drain the tank and wipe it out with a damp sponge. It will get 25 years worth of crud out of the tank.

 

Bluesilver pretty well has it nailed down.