I just passed the Nevada smog check. I wanted to share my results, and what things I did that may help others pass too.
Our test is a tailpipe sniffer done at 2500 RPM and idle (anywhere between 450 RPM and 1200 RPM).
2500 test
12 HC (<=220 allowed)
0.22 CO% (<=1.20 allowed)
15.20 CO2
0 O2%
idle test (968 RPM)
96 HC
0.00 CO%
14.40 CO2
2.4 O2%
My car is an 87 GN with ported intake, ported iron heads, roller cam, 6 year old catalytic convertor, a TE-60 and 55# injectors. I have my RJC Power Plate drilled for EGR.
I downloaded the smog chip from GNTTYPE.ORG, and then did my own little tweaks. Since I don't have a previous set of results, I don't know if I made things better or not, so my changes might or might not be any good. They were:
increased fan on to 207, fan off to 200
Set Closed Loop A/F ratio to 15.0:1
I took out ~5 degrees of timing out of the lower RPM's to try and heat the exhaust more (more flame in the exhaust).
I raised the P/N idle curve to 1000 around the relevant temperatures.
I also put 87 octane in the tank.
I changed the oil just minutes before driving over to the test.
My idle BLM was hovering right around 128, and I saw plenty of cross counts.
My exhaust had a hint of sour smell, but was otherwise coming out fairly clean.
Again, I hope someone finds this useful.
Our test is a tailpipe sniffer done at 2500 RPM and idle (anywhere between 450 RPM and 1200 RPM).
2500 test
12 HC (<=220 allowed)
0.22 CO% (<=1.20 allowed)
15.20 CO2
0 O2%
idle test (968 RPM)
96 HC
0.00 CO%
14.40 CO2
2.4 O2%
My car is an 87 GN with ported intake, ported iron heads, roller cam, 6 year old catalytic convertor, a TE-60 and 55# injectors. I have my RJC Power Plate drilled for EGR.
I downloaded the smog chip from GNTTYPE.ORG, and then did my own little tweaks. Since I don't have a previous set of results, I don't know if I made things better or not, so my changes might or might not be any good. They were:
increased fan on to 207, fan off to 200
Set Closed Loop A/F ratio to 15.0:1
I took out ~5 degrees of timing out of the lower RPM's to try and heat the exhaust more (more flame in the exhaust).
I raised the P/N idle curve to 1000 around the relevant temperatures.
I also put 87 octane in the tank.
I changed the oil just minutes before driving over to the test.
My idle BLM was hovering right around 128, and I saw plenty of cross counts.
My exhaust had a hint of sour smell, but was otherwise coming out fairly clean.
Again, I hope someone finds this useful.