Quote:
Originally Posted by memphis2857
That?s awfully low. Should be around 200.
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Yes no yes. The number alone means sweet FA. Some 'quality' gauges use adapter fittings.. they can add a couple of cc's to the trapped volume which will in turn give a lower reading than the engine actually is. Even more so if the volume of the tubing is counted.
Comp readings mean verrry little unless a specific gauge is used to make comparisons.
My cheapo gauge always reads low, but my engines run strong and happy. I just work off percentages of compression loss along with piston blow by, coating wear, etc visible when peaking in the exhaust port... to help determine when a top end is due. Typically around 70hrs for me.