Smog Legal.....
07-11-2007, 11:23 PM
#1
Melting Slicks
Thread Starter
Smog Legal.....
Does anyone have trouble passing smog or inspection with a 383 LT1? Is it the cam or the extra displacement that makes it fail? Will a combo of a small cam and Long tubes top it over? Really I just wanna know what doest it take to go fast and stay inspections legal?
07-11-2007, 11:28 PM
#2
Team Owner
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St. Jude Donor '05
I dont know if you need an EO # in Wa. The 219 cam should pass..211 for sure. PM member TJWong, awesome tuner whos somewhat local to you.
07-12-2007, 12:11 AM
#4
Le Mans Master
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C4 of Year Finalist (appearance mods) 2019
It will pass with long tubes on provided that you run cats right after the collectors and you run the car for a good hour prior to the inspection. The cam may make a difference but Tom Wong or Brads custom auto can help you.
07-12-2007, 12:31 PM
#6
Melting Slicks
The cubes won't hurt your emissions, it's cam choice you have to be careful with. I have run 224/230 on a 112 lobe sep, on several 383's I have built with no problems passing emissions. I have heard of some guys running upwards of 230 duration on a 114 lobe sep passing. I haven't rolled the dice on an engine that has to pass emissions to try something that big. I think it gets "ify" when you go beyond about 224 intake duration on a 112 lobe sep, or tried to close the lobe sep below 112 with that much duration.
