I know people have asked this but come on guys, you who have gotten thru please reply and give emission readings if you have them. Thanks in advance. <img src="gr_stretch.gif" border="0">

 

So no one on here with a aftermarket cam has gone and tested legitamitely to see their emission results?

 

Anyone? I would think this would be a important question for almost everyone on this site.

 

Help anyone.

 

No such thing in Florida.. No testing.. <img src="gr_stretch.gif" border="0">

 

The only one I can cite specific evidence for is the "B1" camshaft. I am sure much more agressive camshafts could pass, but that is just speculation.

Chris

 

My MTI Stage II set up with the B1 cam passed the IM240 test easily. The results I got and the B1 cam specs vs the TR 220 and 224 cams(on 114LSA) show that both of those cams would pass the test as well. Any durations less than the 220 degrees at .050 will probably be fairly easy to pass, even going into the 112LSA region. I don't have any specifics on 112LSA cams passing the test, though. My NOx reading was showing more than 50% of allowed on the test, though, so I wouldn't try much bigger than the 224 TR cam.

Also, I ran CarSound hi-flow cats on the car. I personally think RT cats do a better job and the stock cats would also help, although robbing you of some power.

Todd

 

The new I/M 240 tests are different then the ones you mention.

Your state as of this date is not doing I/M yet.

The states that are is :

Thus far for last year eight states have started OBDII pass/fail checks:
Oregon, Wisconsin, Alaska, Utah, Maine, Vermont, Indiana, and Arizona.

This year, fifteen more states/areas are expected to begin OBD checks:

February - Delaware and Nevada

March - Illinois and Washington DC

April - Louisiana and Texas

May - California, Georgia, North Carolina and Texas

June - Massachusetts

July - Kentucky, Washington and Maryland

September - Virginia

In January 2003: New Hampshire, New Mexico, New York, Ohio and Rhode Island

Connecticut and Missouri are delaying OBD checks, with an expected phase-in sometime during 2005.

New Jersey has proposed a delay in start-up and plans a partial phase-in with no specific dates.

John
Member of SAE.

[quote]Originally posted by BLK 98WS6:
<strong>My MTI Stage II set up with the B1 cam passed the IM240 test easily. The results I got and the B1 cam specs vs the TR 220 and 224 cams(on 114LSA) show that both of those cams would pass the test as well. Any durations less than the 220 degrees at .050 will probably be fairly easy to pass, even going into the 112LSA region. I don't have any specifics on 112LSA cams passing the test, though. My NOx reading was showing more than 50% of allowed on the test, though, so I wouldn't try much bigger than the 224 TR cam.


Todd</strong><hr></blockquote>

 

John,

can you explain exactly what is done and what they look at in the computer for the OBD2 checks?

For instance, if my EGR is taken off the car and I have it deleted from the computer, will they find this out? or are they just scanning for current trouble codes?

thanks,
Steve

 

Team ZR-1,

Thanks for noticing, but here is a new one on you. I relocated to Colorado last year. The IM240 test was done in Maricopa County, Arizona in late 2000. It has the same limits as the California test without the CARB rules.

Thanks again.
Todd

Former residence, Chandler,Arizona where IM240 emissions is done.

 

I passed easily with B1 and dual CnL cats.
I dont know if my 228/228 112LSA cam will pas though <img src="gr_grin.gif" border="0">
Chris

 

My old 222/224//113 comp passed in another car with TTS headers and cats.

 

Thank you all for inputs, but please check test results and post your cams and Hc, Co and NOX readings as well as limits. This sounds like im asking alot but its really helpful/important to know this info.

 

I looked for my emissions results, but I cannot locate the form. I e-mailed it to Tony(Nineball) a long time ago for delivery to MTI. Jayson may actually have a copy of the results on file, as I provided him with all the details of my set up as it progressed(I ordered all the parts and did the install in my garage). The only thing I was looking for was to keep the results below 50% of allowable on the test(to allow for some increase as miles wore the motor a little) and only the NOx results reached that level. The hydros and CO where not much higher than stock.

The "R1" cam also passed emissions easily in the 422 cubic inch displacement LS1 MTI builds, just in case anyone is interested.

Todd

 

Anyone please respond.

 

Hey ful! I'll be your guinea pig! <img src="gr_images/icons/wink.gif" border="0"> U pick the cam U want to test I will buy it U will install it I will dyno the **** out of it! <img src="gr_images/icons/wink.gif" border="0">

 

Steve,
first thing is the new EPA smog tests at this time are a total zoo.
These tests were to start in 1999 but states complained there was not enough test data to show this would all work, so EPA held passing the rules untll about 500,000 cars were tested in states that were trial testing I/M 240.
Those tests were not the same level as the completed EPA rules finally passed in mid of last year, Many states smog station thought there would be more delay and never got their people OBD-II trained or got the scanners, etc to do proper I/M 240 testing.

To make it worse if EPA feels certain counties are real dirty, air wise, you not only have to have I/M tests but also be put on a chassie dyno ( EPA calls threadmill) to do load testing rather then older idle tests.

Some smog stations got only generic OBD-II scanners but really enhanced DTC scanners are needed so those smog station now have to get the right scanner.

The I/M tests can be done by you with a decent scanner, you click on the I/M icon and it comes right up and tells you if the functions are in a completed (passed) or non complete (rejected) state.
It tests to be sure the MIL light has not been screwed with, bulb taken out or custom code was written in PCM to keep the MIL light off since the I/M tests say if MIL light comes on, you fail. I/M tests functions that are smog related, cats, EGR, o2s, heater of 02, AIR, is your gas cap leaking, etc.

This year being a ramp up, EPA now says for a dmog station to get yearly license, there people have to take and pass OBD-II class ( so they would know enough if your screwing with PCM), and must have scanner and other tools EPA has approved.

While they are in this learning stage, cars that should fail might pass, and of course cars that would pass fail cause smog tester knows zip of what I/M 240 is.

If you clear DTCs, keep in mind I/M is linked and when you clear DTC, it places ALL I/M tests back to non complete and may take 40 drive cycles to get into a complete state (EPA did this so if you blow out DTCs to turn MIL off, you screwed yourself into non completed I/M state.

Each state doing I/M OBD-II testing for this year will be screwed up doing I/M but to be sure use your scanner and do I/M so you know if you would pass or be rejected.
If they are smart, they can trip a certain DTC code and see if PCM responds or if you have PCM code that has turned that DTC off.


John

[quote]Originally posted by Top Fuel:
<strong>John,

can you explain exactly what is done and what they look at in the computer for the OBD2 checks?

For instance, if my EGR is taken off the car and I have it deleted from the computer, will they find this out? or are they just scanning for current trouble codes?

thanks,
Steve</strong><hr></blockquote>