[dstolarc]

Lets say I have a cam with these valve events at 0.050 lift.
IVO 1.5 BTDC
IVC 37.5 ABDC
EVO 49.5 BBDC
EVC -2.5 ATDC

Now I want to retard the cam 2 degrees, What will my new valve events be?

 

[toddturbo]

add 2 to every one of those events.

1.5 + 2 =3.5, etc.

 

[rstoff]

add 2 to every one of those events.

1.5 + 2 =3.5, etc.

Actually IVO of 1.5 BTDC would change to 0.5 ATDC and EVO of 49.5 BBDC becomes 47.5 BBDC..

To the OP: probably a typo but (-) is not used in timing events.

 

[dstolarc]

Actually IVO of 1.5 BTDC would change to 0.5 ATDC and EVO of 49.5 BBDC becomes 47.5 BBDC..

To the OP: probably a typo but (-) is not used in timing events.

Hmmmm... Here is a screen shot from Desktop Dyno 2000, it clearly shows a (-) number. I know people don't like DD2K
but I'm not making it up. It is there.

 

[Mustang5L5]

My Cam card also uses a (-) to denote a timing event.

It's listed as:

Exhaust: open 43.0* BBDC, close (-3.0*) ATDC

It did confuse me a bit, but i found reference to negative values here

Camshaft Duration

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