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Old 10-25-2020, 04:37 PM   #21
bbrocksr
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Join Date: May 2010
Location: Yakima Washington
Posts: 913
Default Re: Finally some Cam Degree Numbers - Now what?

Quote:
Originally Posted by Russ/40 View Post
I'm back, and have no idea what I am supposed to make out of the numbers. Here they are. If you recall I have been reluctant to pull the heads, and it was suggested I degree the exhaust valve on number one.

Reconfirmed TDC and very repeatable.
The info I found on the 77B: Int and Exh durations 260* or 220* at .050"
Lobe separation 111*, lift .325* Lash .014".

I got: .050" open at 148*
Exhaust starts to open @ 120.5*
Exhaust starts to close @ 348.5*
Exhaust is closed at 9* ATDC
Exhaust Lash is .014"

Is this enough to get a feel for the cam location? What else need I do. Exhaust centerline?
Russ, In your numbers you say the exhaust closes at 9* ATDC, the 77B is supposed to close at 19* ATDC. That's 10* early, If you closed up the lash what would it close at?
Bill
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