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#31
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Quote:
Olu, take the car to the Columbia, MD facility just off Broken Land Parkway. The dyno's kaput more often than not. I wonder though, if you flunked test number one on the dyno, if you could do the retest with the sniffer? Tell Kevin I sent you. There's a guy in New Windsor who has cats for sale on the cheap. You may know him. Have fun & good luck. Ron (perfect emissions every time).
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Good s**t happened. 69 was worth the wait. '92 stock semi-pristine ebony - 160K '96 Grand Caravan - 240K '01 Miata SE - 79K '07 Chrysler Pacifica - 60k - future money pit. |
#32
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Why are the dynos bad? When I looked at my car, all wheels were turning in the same direction.
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Out for good. |
#33
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Maryland AWD Dyno Test procedures
DavieGravy reported that all his tires were spinnning in the same direction. My question: does this specific dyno system have four drums (or two sets of wheel rollers)?
If there are two sets of drums (total of four), I'll partially buy off on the test procedure, otherwise, something is suspect. This is just a personal question that begs an answer. The only four drum dyno I've ever seen was in Europe and was used to determine differential dynamic braking force (i.e. front vs rear or same axle side to side braking force.) The Dutch vehicle inspectors were hell when it came to clearing an American vehicle. The primary reason: insufficient braking force, front/rear or same axle side to side. These guys loved giving you a pink slip that indicated you have a problem. The Dutch didn't seem to understand the dual brake system that was created in Europe. Who else better situated to test right front/left rear braking force! Still wondering about a stateside four drum roller system designed to test emissions. Mike |
#34
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Re: Maryland AWD Dyno Test procedures
[QUOTE]Originally posted by Rosevineboy
[B]DavieGravy reported that all his tires were spinnning in the same direction. My question: does this specific dyno system have four drums (or two sets of wheel rollers)? I take it Davie's comments were a joke? Yes, four drums. A double roller for each wheel. Scary! Ron.
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Good s**t happened. 69 was worth the wait. '92 stock semi-pristine ebony - 160K '96 Grand Caravan - 240K '01 Miata SE - 79K '07 Chrysler Pacifica - 60k - future money pit. |
#35
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Re: Re: Maryland AWD Dyno Test procedures
[QUOTE]Originally posted by Ron Mummert
[B] Quote:
When you say dynos, do you mean the roller drums they put the vehicle on to do the emissions test? I'm thoroughly confused here. Why would that be a bad thing for our cars? Dont' the drums spin freely with the wheels? Like I said, if all wheels turn in the same direction, what's the problem? Why can't we go in the 4wd lane along with all the other AWD/4WD vehicles? Confused, very confuesed. ??????????? And what is a "double roller?" Sorry if I'm missing here. Thanks.
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#36
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Sorry for my confusion
Okay, looks like I started something that is being blown out of proportion, not only by myslef by others also.
In response to DavieGravy's last reponse, I can tell the young man is confused. When you go back and read the previous posts, I can understand why. I think I too, would be confused. My question, (I thought) asked if there were two sets of rollers. That would mean four drums, right? If I am wrong, someone please correct me. The observation I made referenced the way vehicle emmissions were tested in the Lone Star state. I've never seen a double set (my words) of drums, wherein front/rear tires each sit within a drum assembly that contacts each side of the tire patch. They don't have these in Texas, at least for emmissions checks. The inspection tech informed me that if the vehicle was AWD, then they conducted an RPM test (one low, the other high with a sniffer tube). If there is another state using a double type roller system, i.e. four drums, then I would be curious as to how the test was conducted. That's all I was curious about. Davy, yes, all the tires/wheels must turn in the same direction. If they didn't, I wouldn't want to be in the same facility. Kinda like having the front axle in a forward speed and the rear axle turning the opposite direction. That can't happen. At least on any AWD I am aware of. The dyno question is a little harder to answer. My understanding: this machine is used to measure horsepower, torque and braking force. Could a dyno with a front and rear axle setup be used to check SVXs, yes. Dyno's can simulate load, drive angle (degree of slope), force created by the vehicle drivetrain, etc. Didn't mean to confuse anyone, just curious about other states and how they test AWD vehicles. Hope all of this info is a little more clear/precise. If not, send me a PM and we can go from.......... Mike |
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