stock cam lobe centers

[mcbitch]

:1zhelp: anybody know how to degree stock cams? using the 3 holes in stock cam gears? I had head cut .020 and block cut .020 and want to make sure cams are set to factory spec. I saw post saying intake open at 6 btdc closes at 50 abcd exhaust open 53 bbdc close 3 atdc. How is this measured ?Or do use 050 lift and find centerline? With .008 exhaust lash my exhaust cam opens at 123 bbdc and closes at 20 atdc. When lash changes so does opening and closing of valves. With .006 lash my intake opens at 15 btdc and closes 100 abdc? help





















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[IJ.]

Sorry can't help as I've never seen a timing tag for stock cams on a stock head and block.

 

[Nick M]

The holes in the stock gears are for the spanner wrench to hold the gear while tightening the bolt.

 

[IJ.]

Nick: They're actually 2 degree's advanced and retarded if you put the pin in the left/left or right /right holes to allow for Cam belt wear/stretch.

 

[Nick M]

Huh?

Pics?

 

[IJ.]

There are 3 holes in each pully and 3 holes in each Cam

Centre hole in pully and Cam = 0

Left hole in pully and Cam = 1>2 degrees A or R (not 100% certain as I didn't degree stock pullies)

Right hole in pully and Cam = 1>2 degrees opposite.

 

[p5150]

Your cams should look like this at TDC:

-0 --0
0 0 0 0