Need help passing CA SMOG
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
Running a 195*F t'stat on a reverse flow LT1 might not be a good idea. The stock 'stat is 180*F. Increasing the combustion chamber temps increases NOx formation.
The key is still the fact that it failed on all three.
The key is still the fact that it failed on all three.
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Registered User
Joined: Sep 2003
Posts: 325
From: CA
I had no idea that would have an affect on emissions
Registered User
Joined: Apr 2004
Posts: 386
From: Fresno, Ca
You said its a high flow cat on that car?? I'm almost positive that no high flow cats will pass smog in Ca (for the most part). Cut it out, bolt up an OEM cat, retry the smog test, and come back with results...
Registered User
Joined: May 2003
Posts: 319
From: Four Oaks, NC
My bad, I thought mine came with a 195 (I have a 180 in it now).
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
The lower temp (160*F) t'stat will cause a very slight increase in CO and HC, and a small decrease in NOx. Your problem is well beyond "slight".
Registered User
Joined: Feb 2004
Posts: 1,154
From: VA
A good high-flow cat like a random tech usually reduces emissions compared to stock, especially a new high-flow compared to an old OEM.
Registered User
Joined: Apr 2004
Posts: 386
From: Fresno, Ca
"Thanks to all who helped. My friend replaced the high flow cat with a "real" cat, and he passed the smog on the first try. Thanks again to all!"
PWNED BY ME, lol i win...
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