Cam timing

[maytag]

Ohh wild is good But by advancing them 3 deg you are basicly making them milder.
And it's been a loooooong time since I degreed cams on race motors ( mostly Isky, good stuff, would really work with us), so help me out, but it wasn't full-lift we used for that purpose, it was a certain amount of lift off the base circle.
Always fun,
Keith

yup, back in the day, with race-motors, we'd time cams to .050" lift (measured at the cam, not after the rocker-arm). I'm sure that's what you're remembering too.
But following everyone's tech-talk on this motor, it seems the accepted way of timing the TC motor is using the FL (Full-Lift) value, (defined as above, same way you find true TDC of the piston) and timing that event to a corresponding crank-location.

[maytag]

okay, somebody check me, will ya? It's late.

I've got the cam mapped, marked, etc. I've got valves in #1 only, and I'm dry-fitting to check piston / valve clearance. If I'm looking for 110d FL timing (as we discussed above), then as I understand the procedure:

1) bring piston to TDC (already dialed / degreed for accuracy)
2) turn intake cam COUNTER-CLOCKWISE 55d from full-lift.
3) Turn exhaust cam CLOCKWISE 55d from full-lift.
4) put belt on and readjust with adjustable cam-pulleys

is that correct? did I miss something?

I'm still looking for an appropriate way to check my valve/valve clearance. any suggestions?

[BEEK]

guy croft explains it best. but. with the head off, find the center line. turn the cam to .050 lift in both directions then mark the centerline. use the centerline for timing. more acurate than 55deg . if the degree wheel or pointer is off a little
sorry for being short, on way to football game

[maytag]

BEEK, Dood..... haha....

Either I so thoroughly SUCK at making myself understood in english....
or You don't read my posts at all!

I've already found full-lift, and marked it. I'm talking about making sure that full-lift happens at the correct time, relative to the crank.

Here: (this is copied-n-pasted from the Guy Croft page you linked me to the other day)

The cam degree setting at tdc, relative to cam full lift, will be ½ the crank degrees at which you want full lift.
So if you want cam full lift (see below) at 110 crank degrees the inlet cam will need to be set at 55 cam degrees before cam full lift (no 1 lobe) at tdc and the exhaust 55 cam degrees after cam full lift.
EG: In the above example –
For the inlet cam turn the pulley anti-clockwise 55 cam degrees from full lift to put it before its full lift posn.
The exhaust cam should be rotated clockwise 55 cam degrees from full lift to put it after its full lift posn.

I just wanted to restate it in my own words, so that it would be clear if I understood or not.... 'cuz I ain't gonna lie: Guy Croft talks over my head.

edit:
I got it.
See "Purple Cam" thread. And THANKS to all who helped me work through that part!