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Effective "emissions" mods?

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Old Aug 13, 2001 | 02:48 AM
  #1  
I ROCK's Avatar
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Joined: Jul 1999
Posts: 496
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From: Chicago, IL
Car: 89 IROC-Z
Engine: LB9
Transmission: 700-R4
Effective "emissions" mods?

I may have to (within the next several months) pass CT emissions. Right now I have an 89 Iroc with a 135,000 mile LB9 with bad valve seals, no cat, and air system removed (egr and charcoal intact.) So basically I want to pass emissions without spending too much money or screwing up the car - that's pretty much what I care about. Here are things I'll do for sure:
1) warm the car to at least 210-220 degrees and drive for awhile before the test..etc.
2) full tune up including o2 sensor and oil change.

Now for the questions.
1) A new cat/air injection setup will probably cost more than $200. That's about how much it will cost to get into prom burning. I will definitely do one or the other, but I'd sure like to do the prom method since I want to get into that anyway. Does anyone familiar with burning proms know what kind of results I can get with this method? I might post this over there, but I figure a good deal of the prom burning crowd is also in the tpi crowd...

2) How much does retarding timing (say to 2 degrees btdc) and/or leaning the mixture and messing with idle and things of that sort help? Does anyone have specific advice in this area?

3) >>if all else fails<< What effect will using denatured ethanol have? It seems this works for a lot of people. How should it be mixed with gas, like is 1:1 acceptable or what?

Thanks in advance for any advice or opinions, especially specific info!

[This message has been edited by I ROCK (edited August 13, 2001).]
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Old Aug 13, 2001 | 02:46 PM
  #2  
red350Z's Avatar
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Joined: Jul 2001
Posts: 70
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From: ct
i wouldnt worry about thr smog pump i dont think it will make a differance and i have never had them look under the hood of my car. i know some people that have used alcohol in there gas to pass the test but dont know haow much. were in Ct are you from. im from bethel.

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