Do our intakes manifolds injest any kind of exhaust or burnt fuel? I'm reading about a kit thats for our car the re routes the exhuast out of our intake. Whats this all about?

 

This isn't the eBay one is it?
-Cyrus

 

I've seen this mod suggested on other websites. is there one on Ebay? what system is this called? Is it just the valve cover tube?

 

There is something like that on eBay, I'm not sure exactly what it does but I believe it is something along those lines. And I fail to see how exhaust fumes would be in our intake. If anything the crankcase fumes, but most people can take care of that easily with a breather. Anyway I just did a quick search and here is the eBay one. His ad is mighty convicing but other make a mockery of this product so I dont know what to think.
-Cyurs

 

Yes. It is the EGR system. From the Haynes manual, pg 6-19:
The EGR system is used to lower NOx emission levels caused by high combustion temps. The EGR valve recirculates a small amount of exhaust gases into the intake manifold. The additional mixture lowers the temp of combustion thereby reducing the formation of NOx compounds.

From my experience blocking off the EGR on my old '78 Camaro, I seriously doubt that there would be any significant gain by doing this to our cars. I had cold start and idling problems from it. Our cars may not suffer from it (I'm no expert) due to the ECM adjusting. Or the ECM could throw a DTC because of it. Regardless, I think it would cause problems with emissions testing for those in states that require it (Louisiana has no emissions tests! ). Personally, I would not mess with the emissions system in the hopes of gaining what I think would be negligible performance gains. But I could be wrong and disabling the EGR on a computer-controlled car could give 20 hp! Just my thoughts. Hope it helps.

Dave

 

Ok thank you for your explaination...

 

Louie, your EGR system is not connected anyway. The EGR hose is that tiny hose that connects to your stock airbox. Your pipe eliminates that. Performance gains are negligible, but it won't hurt our cars either. I have gone through emissions with it disconnected and passed with flying colors. I even have a y-pipe.