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1500 RPM

notsobrite on Sat June 27, 2009 10:52 PM User is offline

Country of Origin: United States

Maybe a dumb question, but here goes. I see engine should be at 1500 rpm when testing or doing certain procedures. If the car doesn't have an tach and you are working alone. What is the best way to determine rpm and hold it. just tryin to learn. thanks. this is a great site.

Matt L on Sat June 27, 2009 11:18 PM User is offline

Not a dumb question. You could buy a laser tachometer, but that really seems like overkill. 1500 is about twice the speed of a normal idle. Listen for the engine noise frequency going up just one octave. That's double the frequency.

CCWKen on Sun June 28, 2009 12:10 AM User is offlineView users profile

That's why they sell Tachometers. Laser, clip-on and some on timing lights. Most decoders/analyzers will also display rpm.

-------------------------
Ken Kopsky

Custom Car Works
"Rules are for the guidance of wise men and the obedience of fools."

TRB on Sun June 28, 2009 12:25 AM User is offlineView users profile

Heck it can be tested at 1200, 1500 or 1750. All your trying to do is get the compressor off idle and pumping more in the range in which it was designed to work.

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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
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CCWKen on Mon June 29, 2009 12:01 AM User is offlineView users profile

I certainly agree with that but the stated rpm for testing is to get some consistency when comparing numbers.

-------------------------
Ken Kopsky

Custom Car Works
"Rules are for the guidance of wise men and the obedience of fools."

TRB on Mon June 29, 2009 12:20 AM User is offlineView users profile

Quote
Originally posted by: CCWKen
I certainly agree with that but the stated rpm for testing is to get some consistency when comparing numbers.

It would make little difference if you ran you baseline test and repeated test at 1250 or 1700 as long as both were ran close to the same RPM. Main goal is to increase the RPM enough to cause the compressor to pump refrigerant in a performance mode.



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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

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