Here is the original. And what I have. Along with a high-flow cat con. Why was this plumbing necessary at that time? And I guess in some States to this day? Yes, I keep my L-82 original but it is soooo tempting to get that plumbing off. Should I go naked?

 

I'd check your local emission laws first. Pulling that stuff in most states is a big no no. If it's exempt go right ahead though...be sure to pull the cat too if you pull the pump. You'll end up plugging up the cat and getting bad flow if you just pull the pump.

Matt

 

Paul
I bet you could take all that pluming off and your car wouldnt run any better,and besides if you are thinking about getting rid of your toy ,it would be better to have that stuff on. Hey I got a better idea ,put some sidepipes on your 79 ,and then it would run better!!!!!!

Have a good weekend Bill

 

Paul,
I went naked except for the heat riser and that will go when I get headers. I was having a problem with the AIR pump causing a backfire (proper terminology would be afterfire) when I would let off the gas but I just recently found out that is caused by the AIR pump vacuum line not being hooked up to the proper port on the carb. Anyway, when I had the problem and I was told the AIR pump may be the cause, I removed the belt to test that theory. Since the problem quit, I just decided to remove the AIR pump. The EGR was gone when I got the Performer RPM (I think that is when the vacuum lines got screwed up) so the only thing left is the heat riser and that will go when I get headers. If you choose to remove everything (although I don't really see the point in your situation), then check out my tech tip on removing the injector tubes that are inside the manifolds. The tip is in the C3 tech tip section although you will have to put the web address in to see the pics since the tech tip section doesn't work like the rest of the forum.

BTW, can you possibly take a pic (or just vividly describe) where the heat riser should be connected? It's not working right now and I want to get it hooked up properly. I know it works because I hooked a vac pump to it and it closed and stayed closed. However, it's not working when the vette starts up so I know it is probably hooked up wrong, just can't make sense of that damn sticker on the hood.

Oh yeah, to answer your question, "why was it required?" Beats me, that's the way they had to have it to pass the fed emissions apparently. At least you have a high flow cat. But if you are going to go naked, you might as well get rid of the cat and increase your power a little. But since I know you are happy with the way your vette runs, frankly, I'd keep the original plumbing on there.



[Modified by sharklover, 4:42 AM 1/26/2002]

 

My car is in commercial storage until April so no pics but here are a couple of diagrams.



The EFE actuator hose is connected to the thermal vacuum switch (TVS) on the thermostat housing if I remember correctly.




[Modified by paul79, 10:06 AM 1/26/2002]

 

Thanks Paul. I don't know why I didn't think to look in the book. Sometimes I have to wonder where my brain is at. Maybe I'll work on it today.

 

Paul,

If you choose to do this please let me know. I'm looking for the heat riser for the driver's side manifold on my '79.

 

I would leave just as it is, It will be worth much more to both you and anybody who purchases it from you should you wish to sell it in the future, however I as well as other here can almost guarantee you it won't run one pbit better with out the emissions system. In 1979 all the L-82, California and high altitude cars came with the emissions package. My own 79 L-48 which was sold in New Jersey along with the other East Coast L-48's were the only cars not to be required to have the Emissions package. It is not that difficult to maintain the system and considering all the work you would to do to remove it and disguise any traces of the system you might as well just leave it alone. It runs alright with the system doesn't it?

 

Paul

You want to know how long that stuff would last on a performance vette, if you had to go get the camera you would have a pic. of where it was.

Killain
They all had an emissions package. The air pump was part of the L-82 pkg. which had 1 step richer jets than L-48.

 

Your right Ganey, I just meant that my L-48 and other East Coast cars didn't have the air pump or air injection system!

 

You think that looks bad? Throw in some A/C plumbing!!! :eek: Some of my plumbing was missing when I got it, and I have removed some of the other plumbing as it went bad. I'm removing the plumbing through attrition. My thoughts were, "I don't want it now, so why spend the money to replace it. I'll spend the money when I have to". I guess that's the Bubba way of thinking. :crazy: :smash: If it's working, I wouldn't bother removing it, but if it's broken, I would probably just take it off until either the law or some other reason necessitated me replacing it.

 

The heat riser is "Chevrolet" and available from any muffler shop. Not a rare part.

 

The duct can be found anywhere as you mentioned but I need the hardware that attaches to the manifold. I was just looking for an OEM part instead of a "one size fits all".