sbc super stock cam question

[Jim Hawkins]

Thank you, I looked and could not find that. Thanks!
I had this cam on a cam doctor but did not trust the numbers as the cam doctor had not been calibrated and looked, well, little rough! And the operator.....

Shows 274-280 duration. I will be spinning this over and checking.
Chart shows .166@106 tdc intake and .178@106 exhaust.
Not sure I follow what that means.

[Kevin Panzino]

Originally Posted by Jim Hawkins

Thank you, I looked and could not find that. Thanks!
I had this cam on a cam doctor but did not trust the numbers as the cam doctor had not been calibrated and looked, well, little rough! And the operator.....

Shows 274-280 duration. I will be spinning this over and checking.
Chart shows .166@106 tdc intake and .178@106 exhaust.
Not sure I follow what that means.

That tells you that if the cam is installed at 106, then the tappet lift at tdc will be .166" on the I and .178" of the E. Its helpful information if you are looking at a different cam and want to understand what impact the other cam may have on your current piston to valve clearance.

[Jim Hawkins]

Originally Posted by Kevin Panzino

That tells you that if the cam is installed at 106, then the tappet lift at tdc will be .166" on the I and .178" of the E. Its helpful information if you are looking at a different cam and want to understand what impact the other cam may have on your current piston to valve clearance.

Ok I get it now. This would be with piston at TDC on the overlap cycle. They list lift values at 106 and 110. So if this cam has a 105 LC should be able to figure the lift from the difference.
Thanks.

[ss3011]

Instead of calling them , if you email the info to the Tech Dept , you will get a message back within a day or two .

[MAURICE BLENDHEIM]

Originally Posted by ss3011

Instead of calling them , if you email the info to the Tech Dept , you will get a message back within a day or two .

X2 or sooner. MB

[Stan Weiss]

Originally Posted by Jim Hawkins

Thank you, I looked and could not find that. Thanks!
I had this cam on a cam doctor but did not trust the numbers as the cam doctor had not been calibrated and looked, well, little rough! And the operator.....

Shows 274-280 duration. I will be spinning this over and checking.
Chart shows .166@106 tdc intake and .178@106 exhaust.
Not sure I follow what that means.

I believe those TDC values are only good when the lobe is used as an intake. If you have the files from the cam doctor you can use those to see actual lobe shape. Many of the comp lobe are not symmetrical when you get down on the closing side.


Stan