Hi all! I am installing a street sweeper cam shaft! The cams ITC is 108* Lift:228 232, Ok this is what I am doing, First TDC. Then bring the intake to max lift, set dial to zero, then turn crank back to 50*then read wheel it say 69, turn crank back to max lift to 50* on other side wheel reads 153. ( 69+153=222 ) /2 = 111 Just like to know if I am on the write track.

 

Sounds like you're doing it right. If you did something radically wrong, you'd get a very abnormal reading.
3 degrees off is a sane enough result to say you did it right. Do it a few times, just to make sure you get that 111 value repeatedly.

Some of that difference (from spec) could be in the timing set, some in measurement error, or the cam is just off a little.

If you have an adjustable timing set, try advancing it 1.5-2 degrees, repeat the degree procedure, and see what you get then for ICL. Now, even at only 2 degrees advance, you may find you still overshot your desired ICL, so don't be surprised to find a 106-107 ICL (for example) on the next try. It usually takes a few tries to nail it, and you will probably find it took less adjustment than what you initially thought it would need to bring it to desired ICL.

 

Thanks Y2 ! jeff from canada.

 

Deleted

 

From the internet but nicely summarizes how we did mine:

Maximum Lift and Intake Centerline. Install an solid hydraulic lifter on #1intake. Set up the dial indicator so that you can measure the amount of lift on the lifter. Everything needs to be perpendicular and properly aligned. The indicator shaft should sit on the lip of the lifter (not in the cup). Once this is properly aligned, rotate the crank clockwise until the lifter is on the bottom (base) of the cam lobe. This is the lowest point so the dial indicator can now be set to 0. Begin rotating the crank until you reach maximum lift (.313 on 270H). At maximum lift, reset the dial indicator to 0. Now rotate the crank in the opposite direction, smoothly and very slowly, stopping at .100" below maximum lift. Now, reverse rotation until the dial indicator reads .050" before maximum lift. Take a reading off the degreeing wheel and mark that number on the wheel (or use masking tape and write it down on the wheel). Continue rotating the crank past maximum lift until you reach .050" below it and stop. [You are taking readings on both sides of the cam lobe.] Read the wheel and note the number of degrees. Take these numbers (example, 1st reading, 62 degrees; second, 150 degrees ) and add them (62+150=212). Divide this number in half (212/2=106) and you will have confirmed the intake centerline (106). [Additional note: Go through this procedure twice to verify your numbers.

 

Deleted my post as I did it from memory, which I guess is bad

I posted how to check the valve events, not ICL.

 

advance 2* finnaly ICL108* Know how do i check the valve events???

 

With cam on base circle, zero the dial indicator. When the lift begins check at 0.050" and then 0.050" before it returns to zero.

 

Thanks! I will do this check tomorrow and let you know what numbers i get! Thanks again for all the help!

 

Hi Y2! Just completed valve events, Started on base circle of cam set dial on zero,start turning motor over slowly lifter starts to open, at 50* took reading 4.5 BTDC now start turning motor slowly stop turning motor at 50"just before back to zero on base of cam,took reading 42*ABDC . Card say, valve timing at 0.50" intake6*BTDC and 42*ABDC. I guess i am wright in there??? What do you think!

 

I think you checked an intake valve, and found slightly less duration than advertised, which is quite typical for Comp lobes.
If you check an exhaust lobe, you'll probably find more duration than spec (also typical).

Now put it together and run it.