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Old 07-25-2010   #1
gbmidyear66
 
Join Date: Feb 2008
Location: Vancouver, BC
Posts: 252
Default Emissions Test Success

I've seen a few recent posts of other ZR's enduring the pain of emmissions testing.

Where I live - older cars have to run the emmisssions gauntlet yearly. I was a little concerned how this would go - given that my 67 usually gets through by the skin of its teeth. I have a one year grace period with the ZR-1 since I recently purchased the car.

I have recently replaced the injectors (Multec look alike disc types from FIC) replaced the plugs (NGK Iridium) and loaded the stock GM PROM. Thought I better give it a try while I still have plenty of time to fix any problems. Made it through with flying clours - my readings were as follows:

Driving Test:
Hydrocarbon ppm - 7.0 (88 allowed)
Carbon Monoxide % - .02 (.66 allowed)
NOx ppm - 5.00 (979 alowed)

Idle:
Hydrocarbon ppm - 8 (75 allowed)
Carbon Monoxide % - 0 (.42 allowed)


Well tuned - these cars can actually run pretty clean.
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Old 07-25-2010   #2
WB9MCW
 
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Location: McHenry, Il.
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Default Re: Emissions Test Success

Congrats on the pass
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Old 07-25-2010   #3
Kb7tif
 
Join Date: May 2009
Location: S Nevada
Posts: 352
Default Re: Emissions Test Success

Well here is a tidbit for ya. My 1992 had ported plemum, chipped, fidanza, watson small tubes, random tech cats.
Passed tennesse emissions no problems this year.
(new owner was happy)
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1974 454 550hp (avatar car) On the blocks- -Scharger install !
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Random tech cats
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Old 07-25-2010   #4
Aurora40
 
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Join Date: May 2005
Location: Leesburg, VA
Posts: 2,713
Default Re: Emissions Test Success

Quote:
Originally Posted by gbmidyear66 View Post
Well tuned - these cars can actually run pretty clean.
The problem generally is when you have headers and bullet cats. Congrats on passing, though. But they test a '67? A car that had no emissions control devices nor emissions limits when new? How can they expect it to have controlled emissions now?
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Old 07-25-2010   #5
Kb7tif
 
Join Date: May 2009
Location: S Nevada
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Default Re: Emissions Test Success

Quote:
Originally Posted by Aurora40 View Post
The problem generally is when you have headers and bullet cats. Congrats on passing, though. But they test a '67? A car that had no emissions control devices nor emissions limits when new? How can they expect it to have controlled emissions now?
Yes the random tech are bullet cats after the long tubes.
__________________
1995 Convertible Supercharged Auto
1974 454 550hp (avatar car) On the blocks- -Scharger install !
1992-Zr-1 Sold.
Watson Headers
Ported Plenum, Housings
Random tech cats
Fidanza Flywheel
Chipped, Relocated Mat
Woods 165 stat
Borlas, Straights
1996 Lt4 Sold
1994 Lt1 Sold
2004 Z06 Sold
AKA** Illenema
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Old 07-26-2010   #6
gbmidyear66
 
Join Date: Feb 2008
Location: Vancouver, BC
Posts: 252
Default Re: Emissions Test Success

The 67 has much higher limits. But I generally have to play with the idle adjustment and timing to squeak through, then readjust everything again so it runs decent.

I now have it plated as a collector car - so I will be exempt in the future.
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