cam timing - 1 tooth = how many degrees?
08-13-2012, 07:03 PM
#21
yeah i'm sure. used solid lifters and a dial indicator on top of the pushrod. installed the piston stop and rolled the engine back and forth and bent my coat hanger around until it matched perfectly on both sides. removed piston stop from there and measured .050 from peak lift on both sides.
08-13-2012, 07:11 PM
#22
TECH Fanatic
^why the huge cheater bar on your crank? mine was easy to turn with only a 15" handle...
Also, your avatar is hilarious. My 4 year old has perfected the move nicely...
Also, your avatar is hilarious. My 4 year old has perfected the move nicely...
08-13-2012, 07:15 PM
#23
his name is ***** and that move is called the helicopter. the long cheter bar is so i can make TINY controlled moves in the valvetrain. i can spin the motor over no problem with the wrench alone, but the cheater makes me alot more precise when looking at a dial indicator. tiny moves on the inticator look HUGE!
08-13-2012, 07:33 PM
#26
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I would try and get you dial indicator right on the lifter if you can, any angle between the indicator shaft and the lifter will cause a faults lower reading. You could (if your not already), just use the oil port in the top of the rocker, that way you are sure the push tube is strait, then you just need make sure the indicator is parallel with the push rod.
Last edited by Wilde Racing; 08-13-2012 at 07:50 PM.
08-13-2012, 09:51 PM
#29
Maybe your solid lifter is not properly calibrated...
Seriously though I think the guy that indicated it in on the machine made a mistake. It happens. If you see they way they attach the cam blank and the lobe master in ralation to each other you would understand.
Here is a lobe master being made from an existing cam shaft.
Volvo D12 camshaft repair - YouTube
Making a cam from a blank is the same basic process. It follows the master wheel for each set of lobes. The cam is turned X amount of degree's in relation to the master to cut the lobes for each cylinder. If the guy running the machine did not indicate it in properly when he started everything will be off in relation to the start point.
As you can see from this next video a very small amount is taken off when shaping the lobe. In this case they are repairing a damaged lobe On a camshaft that is no longer available and probably very hard to find a used one. Just like a mill or lathe there is a set of adjustment dials so they can keep track of how much they take off until it bottoms out on the stop. The stop is set after the first set of lobes is finished so that they can duplicate the correct base circle on each set of lobes.
D12 part 2 - YouTube
Seriously though I think the guy that indicated it in on the machine made a mistake. It happens. If you see they way they attach the cam blank and the lobe master in ralation to each other you would understand.
Here is a lobe master being made from an existing cam shaft.
Volvo D12 camshaft repair - YouTube
Making a cam from a blank is the same basic process. It follows the master wheel for each set of lobes. The cam is turned X amount of degree's in relation to the master to cut the lobes for each cylinder. If the guy running the machine did not indicate it in properly when he started everything will be off in relation to the start point.
As you can see from this next video a very small amount is taken off when shaping the lobe. In this case they are repairing a damaged lobe On a camshaft that is no longer available and probably very hard to find a used one. Just like a mill or lathe there is a set of adjustment dials so they can keep track of how much they take off until it bottoms out on the stop. The stop is set after the first set of lobes is finished so that they can duplicate the correct base circle on each set of lobes.
D12 part 2 - YouTube