Smog Mesurement Read Out Questions
05-11-2013, 01:12 PM
#1
Le Mans Master
Thread Starter
Smog Mesurement Read Out Questions
May 2013
Hi all,
How do these smog/ exhaust numbers compare with other forum member's cars? Comments?
LS2, 36K Mileage, New Engine Oil, Calif car
Shorty Headers, Random Tech Cats, X-pipe...intake & engine OEM.
1) HC (PPM) 15 mph = 21 and 25 Mph = 16
2) CO 15 mph = .09 and 25 Mph = .08
3) NO (PPM) 15 Mph = 346 and 25 Mph = 574
Hi all,
How do these smog/ exhaust numbers compare with other forum member's cars? Comments?
LS2, 36K Mileage, New Engine Oil, Calif car
Shorty Headers, Random Tech Cats, X-pipe...intake & engine OEM.
1) HC (PPM) 15 mph = 21 and 25 Mph = 16
2) CO 15 mph = .09 and 25 Mph = .08
3) NO (PPM) 15 Mph = 346 and 25 Mph = 574
05-11-2013, 06:26 PM
#2
SUBVETTE
Last smog I had: HC (PPM): 15mph 1, 25mph 1; CO (%): 15mph 0.02, 25mph 0.01; NO (PPM) 15mph 0, 25mph 0.
Car was basically a stock 06 with K&N intake and ported T.B.
I understand that starting this year there is no sniffer test anymore and they just plug in to the ECM to check systems operation. Anyone with more info on this chime in.
Car was basically a stock 06 with K&N intake and ported T.B.
I understand that starting this year there is no sniffer test anymore and they just plug in to the ECM to check systems operation. Anyone with more info on this chime in.
Last edited by SUB VETTE; 05-11-2013 at 06:33 PM. Reason: added info
05-11-2013, 08:09 PM
#4
Burning Brakes
Mine were about the same, even with a Comp XER273H14 cam. And, yes, starting in July, no more sniffer. Measurements are supposed to be done with STFT's and LTFT's and calculate rich or lean conditions at speed. EFI has become so efficient, so, no CEL no worries.