[ABTS]

I Need To Retard My Cam By About 2 Degrees. Which Direction Should The Thin Portion Of The Bushing Be Facing?

[CNC-Dude]

There is an infinitesimal number of positions the offset bushing can fit into the timing gear. You need to use a degree wheel to ensure it is done correctly, plus the timing gear has to be drilled out first before the bushing will fit into it.

[F-BIRD'88]

Look at the normal rotation direction of the crank and cam.

look at the cam timing gear

now Look at the cam pin, not the bushing.

To advance the cam, the cam pin leads the direction of rotation.

The various bushings degree value is only a rough guide.

Check how far the cam actually moves with the degree wheel.

Be sure to use a cam bolt locking plate to hold the bushing in place
and the cam bolts locked.
Ya they can come loose.

[ABTS]

I've Already Degreed The Cam And Came Up With An Actual Intake Lobe Center Of 107 Degrees And The Cam Card Says 106 Degrees. This Means I Have To Retard The Cam, Correct? So From What You're Saying The Pin Should Be Following The Normal Direction Of Engine Rotation By About 2 Degrees?

[F-BIRD'88]

No the cam is now 1deg retarded from the cam card spec.

its close enough, leave it alone.

Always work with the intake event closing point at .050" lifter rise
+/- 1 ° is fine.

the actual cam timing may not be a whole number

A 224 deg cam is often not actually 224deg @.050"

could be 223° 16" or....

1 ° has 60 " 's (Minutes)

The number are often rounded off for simplicity.

+/- 1 deg is A OK.

[ABTS]

Thank You Sir You've Explained A Lot.

[cobalt327]

It won't hurt to go 2 degrees advanced from where it is now (+1 degree advanced overall), it will tend to offset the chain stretch that happens to a new chain when it breaks in. It also won't hurt if you do nothing.

If you use a bushing, drill into the backside of the gear, don't drill all the way through the gear. Make the hole 0.010"-0.015" deeper than the bushing- this will capture the bushing, with no way for it to come loose.

[engineczar]

Another thing to remember is depending on how much you change the pin location you might need to slot the bolt holes. There's only so much clearance in them.

[F-BIRD'88]

Originally Posted by engineczar

Another thing to remember is depending on how much you change the pin location you might need to slot the bolt holes. There's only so much clearance in them.

Just drill the three cam bolt holes in the gear using the same dill bit used for the cam pin hole.

Don't forget the cam bolt locking plate.