Yes, except that since most cars these days are FWD and my wagon is
RWD, the car is backed onto the rollers so the fan was at the back!
No aid for the cooling!
I'm sure you've hit the nail on the head!
Gerard
At 11:12 PM -0400 9/13/04, Dave Carpenter wrote:
>Do they run a fan into the front of the car to simulate road
>conditions? Most dynotesting you see on the TV they have a giant fan
>to simulate the air flow and keep overheating from happening. Fresh
>oil change helps emission testing for me.
>
>Dave
>
>Glen Byrns wrote:
>
>>Gerard,
>>
>>Overheating will definitely raise the NO component of the exhaust. Anything
>>that lowers the combustion temperature will reduce the NOx output. Problem
>>is that they have to "warm the car up to operating temperature" before
>>performing the checks. An ethanol rich fuel should help, anything you can
>>think of to lower the compression ratio will help the NO, but hurt the
>>hydrocarbon emissions. If your cat conv. is in good shape, you could handle
>>the additional HCs created as you try to drop the NO. They are supposed to
>>verify that the timing is "in range", so that rules out the old trick of
>>retarding the timing for the day of test and putting it right back when you
>>get home. You should, however, be sure that it is set at the lowest
>>allowable amount of advance when you are tested. I took a class on all this
>>stuff 30 years ago, but now three of my four cars are EXEMPT. I may switch
>>the Austin over to bituminous coal just for a giggle.
>>
>>Glen
>>
>>
>>>Well, time for my biennial SMOG check here in Kalifornia. If you
>>>don't already know, last year they implemented a dyno into the
>>>process and added NO gasses to the test. All my other reading were
>>>extremely low, but I failed on NO (PPM) max at 15 MPH is 791 and I
>>>read 965, at 25, max is 730 and I read 908. The odd thing is my car
>>>overheated in the process (which it has not done in two years, ever,
>>>and I'm wondering of that could cause the problem. If not, does
>>>anyone know what needs to be corrected to drop this number?
>>>
>>>Thanks for any help.
>>>
>>>Gerard
>>>--
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