I just bought a timing chain with zero degree, 4 ret, 4 adv. I set the crank sprocket at zero deg. I was told the cam(xe-256h) was retard 4 degrees from the manufacturer ? Now i'm confuse where to set the crank sprocket ? 4 advance ?

 

Comp Cams are ground with 4* advance.

http://www.compcams.com/v002/Instructions/Files/145.pdf

 

Yep they have a 4 degree advance built on them for better torque and response, anyways set it at 0....

 

yeah, the comps come with 4 degrees advance so install it straight up. The stock cams/timing chains were retarded.

 

Thanks, i really apreciate it. Don't need to change anything.

 

What does it mean to set the timing straight up?

 

Set the crankshaft sprocket at 0 degree. Factory crankshaft sprocket is only one place you can set and is 4 deg retard for emission thing. Aftermarket timing chain set can be adjust 4 ret, 0(straight up) or 4 adv.

 

to be technically correct, the term 'straight up' refers to the intake lobe center line or ICL, not the timing set crank sprocket position

read here under 'Intake Centerline'
LT1howto.com :: Camshaft basic specs and concepts

to install a Comp cam ground 4* advanced 'straight up' you'd need to set the crank sprocket at -4* to counter the advance ground into the cam

 

Ok, i understand your point grclarck351. Look,in my first post, why i want to set up 4 adv. Where is best to set it on crank to have max hp and torque ? thanks

 

i'd install the timing set at 0 and check the cam position with a degree wheel to verify that it's where Comp says. short of that, just install it at 0