Stupid question # 1463
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Le Mans Master
Joined: Aug 2001
Posts: 7,804
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From: Standing still with all my might Texas
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St. Jude Donor '09-'11
Stupid question # 1463
I've been meaning to ask this for a long time but I keep forgetting when I finally get in front of the puter :crazy:
What exactly is being done when you "degree" a cam?
I assume that this involves adjusting the cam's degree angle to the crank, but if this is the case how do you physically make this adjustment since the cam sprocket is keyed to the cam by a steel dowel pin and three bolts, and the crank sprocket is pressed onto a single woodruff key.
I'm so confused! :cry :cry
What exactly is being done when you "degree" a cam?
I assume that this involves adjusting the cam's degree angle to the crank, but if this is the case how do you physically make this adjustment since the cam sprocket is keyed to the cam by a steel dowel pin and three bolts, and the crank sprocket is pressed onto a single woodruff key.
I'm so confused! :cry :cry
Melting Slicks
Joined: Dec 2000
Posts: 2,198
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From: Eastern Connecticut
Re: Stupid question # 1463 (Kevin_73)
There are no stupid questions, just stupid answers....
But seriously, you are correct that degreeing is checking the alignment of the cam to the crank. It is adjustable by using an offset crank key or some cam sprockets have provisions for an offset alignment pin.
The process is too detailed for me to type, but you can go to the comp cams website for a detailed description.
Joe
But seriously, you are correct that degreeing is checking the alignment of the cam to the crank. It is adjustable by using an offset crank key or some cam sprockets have provisions for an offset alignment pin.
The process is too detailed for me to type, but you can go to the comp cams website for a detailed description.
Joe
Thread Starter
Le Mans Master
Joined: Aug 2001
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From: Standing still with all my might Texas
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St. Jude Donor '09-'11
Re: Stupid question # 1463 (joe73vette)
you are correct that degreeing is checking the alignment of the cam to the crank. It is adjustable by using an offset crank key or some cam sprockets have provisions for an offset alignment pin.
The process is too detailed for me to type, but you can go to the comp cams website for a detailed description.
Joe
The process is too detailed for me to type, but you can go to the comp cams website for a detailed description.
Joe
I was pretty sure it concerned fine tuning the valve train timing, I just didn't understand how this could be accomplished with the way all of those parts fit together. :D
How common is it for the cam timing to be off? And if it is common are we talking about huge errors, or is this mainly used for fine tuning to optimize a certain rpm range?
BTW, I looked at comp cams page, but all I could find was the video that they sell.
Kevin
Le Mans Master
Joined: Apr 2000
Posts: 5,202
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From: cincinnati ohio
St. Jude Donor '09
Re: Stupid question # 1463 (Kevin_73)
Everthing you will ever need to know about camshaft degreeing and then some at the link below :cheers:
http://www.cranecams.com/master/degree.htm
http://www.cranecams.com/master/degree.htm
Melting Slicks
Joined: Dec 2000
Posts: 2,198
Likes: 2
From: Eastern Connecticut
Re: Stupid question # 1463 (yellow 72)
Crane Cams, Comp Cams, I've looked at so many cam websites, I can't keep them straight...
Kevin, you have it right, the 2-4 degrees that you can move the cam is mainly to fine tune the RPM range. It is very rare that the manufacturers are off on the timing. But it is one of those things that you can check just to make sure, just like bearing clearances are supposed to be correct when you get your crank turned, but you never know until you check.
Joe
Kevin, you have it right, the 2-4 degrees that you can move the cam is mainly to fine tune the RPM range. It is very rare that the manufacturers are off on the timing. But it is one of those things that you can check just to make sure, just like bearing clearances are supposed to be correct when you get your crank turned, but you never know until you check.
Joe
Thread Starter
Le Mans Master
Joined: Aug 2001
Posts: 7,804
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From: Standing still with all my might Texas
Cruise-In X Veteran
St. Jude Donor '09-'11
Re: Stupid question # 1463 (yellow 72)
Everthing you will ever need to know about camshaft degreeing and then some at the link below :cheers:
http://www.cranecams.com/master/degree.htm
http://www.cranecams.com/master/degree.htm
That is exactly what I was hoping for!!! :cheers:
Thank all of you very much.
When I finally accumulate the money to build my next engine I will have to try this out. :D
