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Engine compression test

Tech Talk for Suzuki owners.

Moderators: lay80n, sierrajim

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Engine compression test

Post by Moph »

Just checked compression having done 5000k's on the new rebuild. Readings 1-2-3-4 were 180-180-180-190psi. Results were consistent for 2 separate runs.

Suzuki service manual says "200psi / 400rpm" - is 180/190psi okay? Got no idea how many rpm it's actually doing turning over without firing, but I would suspect its considerably less than 400rpm ... probably more like 250-300rpm.

Compression tester is a cheapo Trisco from Sprints ($40), so not sure how accurate it is either, but at least the relative readings should be correct.
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Post by RockHopper »

Could be if your compression tester is a cheapo that it's out a little. Could also be that if the readings are correct, the valve clearances may be set just a little to tight causing a loss in compression. Overall though, sounds fine to me. :cool:
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Post by lay80n »

They sound fine.

Layto....
[quote="v840"]Just between me and you, I actually really dig the Megatwon, but if anyone asks, I'm going to shitcan it as much as possible! :D[/quote]
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Post by jonno_racing »

yeah thats good
my old motor was

170 180 125 190...

hmmmm
[quote="jessie928"]
maybe you shoudl find something better to do other than diminishing your own view of your own idaquecies and inperfections by concerntrating on others ;)[/quote]
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