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Old 02-08-2011, 01:46 PM
75chev4x4's Avatar
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Cam ?

Do I need an adjustable cam gear to run on my 350 rebuild if I use an aftermarket cam? Our will a stock timing chain set work.

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Old 02-08-2011, 02:07 PM
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Hi
The stock one will work.
Rich
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Old 02-08-2011, 02:29 PM
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Ok thanks, in what case would someone use an adjustable cam gear and need to degree the cam?
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Old 02-09-2011, 11:52 AM
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Hi,

Mass Production. Is one reason to degree a cam. Some new parts right out of the box are far from perfect. You should
degree a camshaft whenever you change it, stock or performance.

After you establish true TDC on the #1 cylinder, you can now degree the camshaft. when you degree a camshaft, it allows you to compare the cam card and camshaft. You're establishing valve-timing events and lift as they relate to crankshaft travel. This is the time to make changes either with the existing cam or opting for another one.

Adjustable cam gears. This adjustment is to either advance or retard the cam timing.

Advance To shift or move the power band up higher along the rpm range. (1/4 mile racing)
Retarded moves the power band lower for more low speed torque. (moving a heavy vehicle off the line)

Take care,
Rich
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Old 02-09-2011, 12:20 PM
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Quote:
Originally Posted by richard stewart 3rd

Advance To shift or move the power band up higher along the rpm range. (1/4 mile racing)
Retarded moves the power band lower for more low speed torque. (moving a heavy vehicle off the line)

Take care,
Rich
Hold on there...
Rich, you've got these two backwards. Advancing the cam improves power below the torque peak(low and midrange power), retarding improves power above the torque peak(high rpm power).
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Old 02-09-2011, 01:02 PM
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Hi Eric.
Thanks for the correction.
This happens now & then, I mean one thing & type in another, (the brain isn't always engaged) The last one was about a 10 bolt for Zildjian's car.
Rich
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Old 02-10-2011, 08:45 AM
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OK thanks for the good info guys
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