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CVO Technical => Twin Cam => Topic started by: Bigmatthew86 on December 28, 2020, 09:27:14 AM

Title: Cvo 103 ccp
Post by: Bigmatthew86 on December 28, 2020, 09:27:14 AM: What should the ccp be for a factory cvo 103? I’m maybe 300ft above sea level. Mine is showing 160-160.
Title: Re: Cvo 103 ccp
Post by: CVO Couple on December 29, 2020, 06:17:25 PM: What is ccp abbreviation for? Compression?

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Title: Re: Cvo 103 ccp
Post by: Bigmatthew86 on December 29, 2020, 07:15:55 PM: Yes technically cold cranking compression.
Title: Re: Cvo 103 ccp
Post by: CVO Couple on December 30, 2020, 07:25:16 AM: 160 psi sounds about what one would expect not knowing more about the engine.

A cylinder leak down test would be a better option if your looking for a problem.

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Title: Re: Cvo 103 ccp
Post by: HD Street Performance on December 30, 2020, 08:51:03 AM: Assumptions only, actuals may vary
Pretty close with added carbon.
;)
Title: Re: Cvo 103 ccp
Post by: Bigmatthew86 on January 09, 2021, 02:58:24 PM: I bought the bike used. It runs good, just trying to figure if it still had factory cams. I pulled the cover but it’s nothing that screams anything has been done in there & it doesn’t have adjustable pushrods. Older man I got it from didn’t know anything the original owner had done. Rinehart duals, SE breather, tts tuned. Seemed like high numbers for stock cams so that’s why I was asking.
Title: Re: Cvo 103 ccp
Post by: HD Street Performance on January 09, 2021, 06:14:32 PM: Was this test done at 2500ft altitude?
The correction factor, STD is more liberal than the defacto standard SAE. Notice the factor is 1.12%. Quite high just for a weather correction.
Title: Re: Cvo 103 ccp
Post by: Bigmatthew86 on January 09, 2021, 09:55:50 PM: I looked them up & they had good reviews. Seems like they’re at about 1000ft however.
Title: Re: Cvo 103 ccp
Post by: HD Street Performance on January 10, 2021, 12:48:26 PM: Good guys can have a dyno stack that is out of calibration. If they know they are not such good guys. Average barometric pressure in the area is about 29.00. The dry 80°F day of the dyno it was baro 27.1" HG? No sense to even get down to the correction factor discussion when the stack is out of calibration. So your suspicions were correct, this is a happy dyno.
If you are in the area look up Bob Thoma, Razorback Performance, Eau Claire, WI and have him do a pull, if interested. If not consider taking 10% off the numbers you received for a ball park of what it will do on a calibrated dyno with the latest software corrected to SAE factor.