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Author Topic: EZ-Start compression test  (Read 272 times)

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Farm boy

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EZ-Start compression test
« on: July 29, 2018, 09:25:06 PM »

I am looking at a set of EZ-Start 570G cams. Since they lift the exhaust valve a little during cranking,  how do you get an accurate compression test ?
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Twolanerider

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Re: EZ-Start compression test
« Reply #1 on: July 30, 2018, 01:43:44 AM »

Couple of options.  Loosen the exhaust pushrods or pull a spark plug and briefly run it on one cylinder.  Then do the same for the other cylinder.
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MCE Performance

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Re: EZ-Start compression test
« Reply #2 on: July 30, 2018, 01:06:56 PM »

Couple of options.  Loosen the exhaust pushrods or pull a spark plug and briefly run it on one cylinder.  Then do the same for the other cylinder.

Good answers right there. It's also a good idea to get the numbers when the build is fresh so when
you go to compare them later on, you have a baseline to work from.

Don't forget to block the throttle open too (if you're doing the Ex pushrod option)

Cheers,
-Matt
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Farm boy

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Re: EZ-Start compression test
« Reply #3 on: July 30, 2018, 09:11:44 PM »

Sounds good. I thought about loosening the exh pushrod, but wanted some verification. Never thought about running on one cylinder.
Thanks for the input.
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