When does the intake valve open with a Stock Cam

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When does the intake valve open with a Stock Cam

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relic-lover

Post subject: When does the intake valve open with a Stock Cam

PostPosted: Sun Feb 15, 2004 6:59 pm

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EFI Slant 6

Joined: Tue Jun 03, 2003 9:42 pm
Posts: 358
Location: San Diego, California
Car Model:

The Slant racing manual said - "The best production cam available for
the slant six engines was used in the 1971-1977 engines. This cam
(PN 3512639) has a 244 degree duration, 26 degree overlap and
a lift of .406" on the intake and .414" on the exhaust. "

It does not tell at what degree of timing the intake opens - Has anybody
measured the valve events on the stock Cam ?

I would like to compare the "effective compression ratio" of the stock
cam and a couple that are canidates for a 170 build. This is to help
determine what static compression ratio to shoot for.

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Doctor Dodge

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PostPosted: Sun Feb 15, 2004 9:43 pm

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Guru

Joined: Sat Oct 12, 2002 11:22 am
Posts: 3740
Location: Sonoma, Calif.
Car Model: Many Darts and a Dacuda

Here are the events (in degrees) taken @ .050" lift:
Intake opens @ 8 ATC, closes @ 26 ABC, duration = 198
Exhaust opens @ 33 BBC, closes @ 10 BTC, duration = 203
DD