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Cam timing #593447
04/04/15 3:43 pm
04/04/15 3:43 pm
Joined: May 2014
Posts: 148
Pennsylvania, USA
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cacinni Offline OP
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Got TDC using my degree wheel, using the method lobe center angle to time cams and checking i/2 a dozen times iam coming up with 106 on the intake, megacycle specs 101 intake, 104.5 on the exhaust, what adjustment do i make to get to megacycle specs, triumph 500 motor, thanks guys!

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Re: Cam timing [Re: cacinni] #593481
04/04/15 7:48 pm
04/04/15 7:48 pm
Joined: Jul 2009
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Vic. Australia
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Pete R - R.I.P. Offline
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Pete R - R.I.P.  Offline
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Vic. Australia
Remove the camwheel from the intake cam.
Without moving the cam, rotate the camwheel 120 degrees clockwise to the next keyway. Fit the camwheel back on. That should advance the timing 4.8 degrees.
The cam will actually move slightly when you re-fit the camwheel, but barely perceptible.

Then you'll need a new timing mark on that camwheel, 17 teeth away from the original mark.

Re: Cam timing [Re: cacinni] #593501
04/04/15 9:01 pm
04/04/15 9:01 pm
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Pennsylvania, USA
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cacinni Offline OP
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Thanks Pete, for future reference, like when i do the exhaust cam, say it was advanced 3 degrees, i would advance how many teeth clockwise to clear up the difference? Thank you!

Re: Cam timing [Re: cacinni] #593509
04/04/15 9:26 pm
04/04/15 9:26 pm
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cacinni Offline OP
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Thanks Pete, for future reference, like when i do the exhaust cam, say it was advanced 3 degrees, i would advance how many teeth clockwise to clear up the difference? Thank you!

Re: Cam timing [Re: cacinni] #593512
04/04/15 10:42 pm
04/04/15 10:42 pm
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Pete R - R.I.P. Offline
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Pete R - R.I.P.  Offline
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You can only change the timing in 4.8 degree increments, unless you start using a selection of different camwheels.
If it's advanced 3 degrees, it will still run fine. You could even be happier with it.

4.8 degrees = 1/3 of a tooth
14.4 degrees = a full tooth

Re: Cam timing [Re: cacinni] #593517
04/05/15 12:19 am
04/05/15 12:19 am
Joined: May 2009
Posts: 10
nc
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fightclub Offline
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nc
Not trying to hi jack thread Caccini but I had a question for Pete R. Mr.Pete did you do a thread/post on details on center lobe cam timing method. I cannot find anything doing search.
Thank you

Re: Cam timing [Re: cacinni] #593522
04/05/15 12:29 am
04/05/15 12:29 am
Joined: Jul 2009
Posts: 3,549
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Pete R - R.I.P. Offline
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Pete R - R.I.P.  Offline
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Posts: 3,549
Vic. Australia
Here's something I wrote on another forum. That should give you an idea.(about 2/3 way down the page) You can measure at the top of the pushrod, with a dial gauge. Just take the measurement at the same lift on both the opening and closing ramp.
Cam Timing Check

Re: Cam timing [Re: cacinni] #593563
04/05/15 7:07 am
04/05/15 7:07 am
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Pennsylvania, USA
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cacinni Offline OP
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FIGHTCLUB there is a excellent article on this in one of the back VINTAGE BIKE magazines.

Re: Cam timing [Re: cacinni] #593657
04/05/15 5:31 pm
04/05/15 5:31 pm
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cacinni Offline OP
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cacinni  Offline OP
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Joined: May 2014
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Pennsylvania, USA
After spending more time on the intake cam utilizing all 3 key ways the numbers i have 98.5, 102.0, 105.0 ran these key ways a couple different times, do these numbers alarm anyone? Plan on trying all 3 key ways during the week to make sure iam getting consistant numbers before moving on to exhaust cam! Thanks for your input guys!


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