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Emissions and Mods
Thread Starter
Evolving Member
Joined: Jul 2003
Posts: 165
Likes: 0
Emissions and Mods
I was wondering if anyone has emissions results to share on stock and modded cars. I took the IM240 test today with my car and had the following:
HC
@idle -- 48ppm (legal limit 110ppm)
@2500 rpm -- 1ppm (legal limit 110 ppm)
CO%
@idle -- .43% (legal limit .75%)
@2500 rpm -- 0 (legal limit .75%)
NO ppm -- N/A (?)
Dilution(?)@idle 15.0 (valid)
Dilution(?)@2500 rpm 14.3 (valid)
My car has all Buschur Stage IV mods except cams (but including 660cc injectors and fuel pump) as well as an SAFCII. When I took the test, I had the stock turboback installed, but everything else in place.
I'm curious to know whether my numbers are higher than stock or whether others have successfully passed with more mods (especially cams).
This is a common topic on the board. Do you think that it ought to be a sticky?
HC
@idle -- 48ppm (legal limit 110ppm)
@2500 rpm -- 1ppm (legal limit 110 ppm)
CO%
@idle -- .43% (legal limit .75%)
@2500 rpm -- 0 (legal limit .75%)
NO ppm -- N/A (?)
Dilution(?)@idle 15.0 (valid)
Dilution(?)@2500 rpm 14.3 (valid)
My car has all Buschur Stage IV mods except cams (but including 660cc injectors and fuel pump) as well as an SAFCII. When I took the test, I had the stock turboback installed, but everything else in place.
I'm curious to know whether my numbers are higher than stock or whether others have successfully passed with more mods (especially cams).
This is a common topic on the board. Do you think that it ought to be a sticky?
You should have tried it with the high flow cat 
Those are nice a turnout for the mods you have on your car. I would expect some higher numbers but the stock exhaust is just so restrictive.
Those are nice a turnout for the mods you have on your car. I would expect some higher numbers but the stock exhaust is just so restrictive.
Thread Starter
Evolving Member
Joined: Jul 2003
Posts: 165
Likes: 0
The car sure is different with the stock exhaust compared to the Buschur 3" turbo back. It spools much more slowly and also the boost was down about 2 psi at peak. I adjusted the ebc to regain the lost boost, but the spool up is still much worse. I wonder how much hp the stock exhaust bottles up with all the intake/intercooler mods?
So, no one has emissions numbers for a stock car?
So, no one has emissions numbers for a stock car?