Emissions Test Success - ZR-1 Net Registry Forums

gbmidyear66 · 07-25-2010

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.

WB9MCW · 07-25-2010

Congrats on the pass

Kb7tif · 07-25-2010

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)

Aurora40 · 07-25-2010

Quote:

Originally Posted by gbmidyear66

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?

Kb7tif · 07-25-2010

Quote:

Originally Posted by Aurora40

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.

gbmidyear66 · 07-26-2010

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.

07-25-2010	#1
gbmidyear66 Join Date: Feb 2008 Location: Vancouver, BC Posts: 252	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. __________________ [SIGPIC][/SIGPIC] __________________ 1990 Corvette ZR-1 #2824 4.10's, Custom PROM, Flowmaster, Top End Port NCRS BC Chapter

07-25-2010	#2
WB9MCW Join Date: Dec 2003 Location: McHenry, Il. Posts: 6,607	Re: Emissions Test Success Congrats on the pass __________________ http://i119.photobucket.com/albums/o...9mcw/SIG-2.jpg http://i119.photobucket.com/albums/o128/wb9mcw/vcm.gif "The Budget should be balanced, the Treasury should be refilled, public debt should be reduced, the arrogance of officialdom should be tempered and controlled, and the assistance to foreign lands should be curtailed, lest Rome will become bankrupt. People must again learn to work instead of living on public assistance." - Cicero, 55 BC " We the people are the rightful masters of both Congress and the courts, not to overthrow the Constitution but to overthrow the men who pervert the Constitution." - Abraham Lincoln

07-25-2010	#3
Kb7tif Join Date: May 2009 Location: S Nevada Posts: 352	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) __________________ 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

07-26-2010	#6
gbmidyear66 Join Date: Feb 2008 Location: Vancouver, BC Posts: 252	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. __________________ [SIGPIC][/SIGPIC] __________________ 1990 Corvette ZR-1 #2824 4.10's, Custom PROM, Flowmaster, Top End Port NCRS BC Chapter