Do you just have your crankcase venting to the atmosphere?

I'm still liking my catch can setup...A LOT. At my last oil change, I had about a half cup of crap in there. I need to look in my manifold with a flashlight to see how it is doin in there...

Gotta keep my A/C though...I hardly use it, but there are some days in Florida when it is even too much for me. That and the g/f would prolly never ride in my car again.

 

No, hes right. More valve overlap=more inert gas is retained in the cyinder=no need for EGR.

 

More overlap means there is MORE unburnt gasses leaving teh combustion chamber. During the overlpa period both intake and exhaust valves are open at the same time. This allows for un burnt fuel to enter the exhaust system.

 

When the intake and exhaust open up at the same time, you have fresh air and fuel coming in, and burnt gases leaving. Because fresh air/fuel are coming in at the same tiime, it ends up trapping some of the already burnt gases. The burnt gases then stay in the cylinder again. This is how EGR works, it cycles burnt gases back into the cumbustion chamber to cool the combustion process down. This iin turn prevents NOX, which is why the EGR is considered an emissions device. When you remove the EGR, you increase the temp inside the cylinder because the burnt gases (inert gas) have a cooling affect. When that cooling affect is gone, you can can get pinging.

More overlap=more burnt gas being retained in the cylinder, versus, say, no overlap, intake closed, exhaust open, most ALL the burnt gas will be pushed out rather than being mixed.

I can scan one of my old textbooks if you like. If I can find it

 

straight from GM:

EGR ELIMINATED
Application of the LQ4 cam produced a valuable side benefit: elimination of the Exhaust Gas Recirculation (EGR) system. The new cam creates more valve overlap, or periods when both intake and exhaust valves are partially open at the same time. Increased overlap allows the LS1 to meet National Low Emissions Vehicle (NLEV) certification without EGR. Removal of EGR reduces engine plumbing and potential leak sources

 

i think that solves the argument

 

I was thinking it was a discussion

 

what kind of injectors do i have on my 02? jw.. seen the injector comment in a post on 1st page

 

98: 28.6 #
99-00: 26.8 #
01+: 28.8 #

 

Soo to avoid pinging you shouldn't remove the EGR-system.

 

reduces PLUMBING, not pinging

 

so if i order a set of QTP LT's race style (as in no egr or air fittings) will it still pass smog???

 

you dont have egr. !air should pass the sniffer and OBDII (tuned), but will fail the visual.

 

god damn ******* visual, always bites u in the ***, but might as well get it with non if im going to have LT's anyways cuz they would fail in itself, so **** it get the race style cuz id fail anyways if they look under the car.

 

Same way I was thinking!

 

As long as there are no dash lights or codes coming up then yes you should pass as long as they don't look under the car or even know what they're looking for.
I just removed all my EGR/AIR stuff on Monday and I am a little nervous about inspection (not due until January 2006) but I will have all my codes deleted and hopefully some sort of fake cats under there by then so hopefully they won't notice too much.

 

im glad we don't have that. cars in Louisiana can fog up the road with smoke and still pass in most areas(except BR and NO as far as i know)