hi guys just wanna be sure about something, did a search and came up inconclusive. TDC for the #1 cylinder is when the timing marks are at 6 and 12? or at 12 and 12? thank you

 

12 and 12 is #1 TDC.

 

awwww f**k i adjusted all my rockers wrong then. gonna redo them, i thought it was 6 and 12 was #1 TDC. thank you very much sir

 

When your number one piston is at TDC, your top sprocket should be at 6 and bottom sprocket at 12. 12 and 12 would be 180 degrees out. Unless you got somethin goin that I am not aware of?

 

im not asking how to align the timing marks if thats what youre thinking. its so i could adjust my rockers. i adjusted them like that, thinking #1 TDC was 6 and 12. but one things for sure, shoebox aint never wrong im pretty sure hes right cause the lifters on the #1 cyl are at the bottom of their travel now that its at 12 and 12. right or worng? thanks.

 

When the cam sprocket is at 6 and the crank sprocket is at 12 and you install the opti, which can only go on one way, the rotor will be firing #6 cylinder.
Shoebox is correct.

 

That is what a lot of people think. That is #6 TDC. The 12 and 6 arrangement is merely a convenient and visually easy way to line up the dots to get the cam and crank in phase.

As Slashz28 found out with the cam sprocket at 12, the #1 lifters are now on the base of the lobes. That's the proof.