Compression test
03-01-2011, 12:02 AM
#2
I HATE SPEEDBUMPS!
Compression can be checked two ways: manually with a compression gauge, or electronically with an engine analyzer that measures cranking compression. With electronic testing, a computer analyzer estimates compression in each of the engine's cylinders by measuring slight variations in engine cranking speed.
I never did it before in my life, i hope this helps a bit...
I never did it before in my life, i hope this helps a bit...
Last edited by monchie; 03-01-2011 at 12:08 AM.
03-02-2011, 04:59 AM
#3
Registered
Compression can be checked two ways: manually with a compression gauge, or electronically with an engine analyzer that measures cranking compression. With electronic testing, a computer analyzer estimates compression in each of the engine's cylinders by measuring slight variations in engine cranking speed.
I never did it before in my life, i hope this helps a bit...
I never did it before in my life, i hope this helps a bit...
Last edited by PeteInLongBeach; 03-02-2011 at 05:03 AM.
03-02-2011, 05:36 AM
#4
There's no accurate way to measure the compression with a standard mechanical gauge.
Especially "static" compression is rpm related, that's why Mazda has a graph to correct for the right rpm range.
Without a chance to analyze the 3 different rotor faces all you're getting is a rough estimate of the rotor's average at an unknown speed.
That's not enough to get an accurate idea!
If you have a good tool however you can come to a little more accurate results by keeping the pressure relief valve open.Just look at the gauge's spikes in a determined time lapse.
Each 3 spikes = 1 revolution, right? count the spikes in 10secs, multiply by 6 and you have a rough cranking rpms estimate.
Still a very rough estimate though and not enough for a warranty claim, is that's what you're after.
Especially "static" compression is rpm related, that's why Mazda has a graph to correct for the right rpm range.
Without a chance to analyze the 3 different rotor faces all you're getting is a rough estimate of the rotor's average at an unknown speed.
That's not enough to get an accurate idea!
If you have a good tool however you can come to a little more accurate results by keeping the pressure relief valve open.Just look at the gauge's spikes in a determined time lapse.
Each 3 spikes = 1 revolution, right? count the spikes in 10secs, multiply by 6 and you have a rough cranking rpms estimate.
Still a very rough estimate though and not enough for a warranty claim, is that's what you're after.
03-02-2011, 11:48 PM
#5
I HATE SPEEDBUMPS!
03-03-2011, 09:33 AM
#7
Registered
03-03-2011, 10:07 AM
#9
Registered
The German guy needed it on a short term in the weekend........it worked for him and he did fix the job with it.......yeahhhhhhh......."Deutsche Wertarbeit" !!!
need to find a way to go get it tho cuz its not in NYC.
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