Author Topic: Degree setting a cam  (Read 734 times)

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Guaire

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on: January 10, 2021, 07:29:36 pm
Has anyone ever done a degree settings on a cam?
What was your set up? I know I'll need a degree wheel.
Cheers,
Bill
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ace.cafe

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Reply #1 on: January 11, 2021, 01:40:08 pm
Here's a video.
https://youtu.be/w3zGfQgYS5g
Pay close attention to how they center the crank stroke at TDC by rotating the crank both ways to see it is truly centered at the top when they set the pointer to zero degrees..

The video shows measuring the cam at the lifter.
We would prefer to use the dial indicator on the valve spring upper retainer, so that the measurement shows the true lift at the valve.

Also, while measuring at the .050" lift points is generally fine, we would like to see measurements when it just barely begins to open, and at just a hair before fully closed, so we can get an idea what the full duration from seat-to-seat is at the valves.

So, record degree measurements at ;
.002" lift on opening and closing, both cams.
.050" lift on opening and closing, both cams.

Amount of Lift at 0 degrees TDC during intake opening. And during exhaust closing. Both cams. This is important to predict piston clearance.

Number of Degrees ATDC at the point of max lift for intake cam. And at max lift BTDC for exhaust cam. This will be the Centerline measurements.

It will probably take an hour or two to do it, if it is your first time. Once you are accustomed to doing it, it is much quicker.

Call me if you have a question/problem.
« Last Edit: January 11, 2021, 01:45:42 pm by ace.cafe »
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TrianglePete

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Reply #2 on: January 11, 2021, 04:21:49 pm
Check out the e-bay ad for UCE cams  US spec.   

It shows how to set up a crankcase for cam timing and manipulation....


Guaire

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Reply #3 on: January 13, 2021, 09:56:28 pm
Check out the e-bay ad for UCE cams  US spec.   

It shows how to set up a crankcase for cam timing and manipulation....

No URL?
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TrianglePete

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Reply #4 on: January 14, 2021, 12:06:02 am
I wish I knew how to send a link....
Royal Enfield U.S. Spec     search that and see all the parts..
I like the fork brace


Guaire

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Reply #5 on: January 20, 2021, 08:46:43 pm
Part one: finding TDC. The next micrometer will be reading off the cam height, arriving tomorrow. After that Motion Pro will get the degree wheel here.
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TrianglePete

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Reply #6 on: January 20, 2021, 11:29:26 pm
I find a piston stop more accurate in setting the wheel at zero.

It can also be done with the head on with a stop in the spark plug hole

How did you like the fork brace ??


Guaire

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Reply #7 on: January 22, 2021, 03:55:11 pm
I find a piston stop more accurate in setting the wheel at zero.

It can also be done with the head on with a stop in the spark plug hole

How did you like the fork brace ??

What fork brace?
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TrianglePete

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Reply #8 on: January 22, 2021, 03:57:17 pm
Search e-bay....      Royal Enfield US Spec parts


Guaire

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Reply #9 on: January 22, 2021, 03:59:31 pm
You do the search. Copy and paste the URL.
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TrianglePete

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Reply #10 on: January 22, 2021, 04:02:22 pm
I am old   no copy and paste capable....


heloego

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Reply #11 on: January 24, 2021, 02:08:30 am
 ::)
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TrianglePete

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Reply #12 on: January 24, 2021, 06:34:44 pm
I don't know what the little face means ????
But I can grind a cam..


heloego

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Reply #13 on: January 27, 2021, 04:15:21 pm
In this case, " ::) " = As am I.
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Guaire

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Reply #14 on: January 30, 2021, 05:11:35 pm
I don't know what the little face means ????
But I can grind a cam..

Would you please stop hijacking my thread!!!
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