sbc super stock cam question
 

I am changing the cam in my 327/275/295 motor in a 67 camaro. Changing from a stick to a powerglide.
The cam I took out is a bullet 276-285 duration on a 107 lobe center.
Cam was installed with intake lobe degreed at 103.
The cam I am installing is a older comp cam. These are the numbers scribed on it.
2233S/2236S R5
2999A
06063-08
It has 272-276 duration and I believe 105 lobe center.
I will verify when degreeing in.
Question is I have no cam card with timing events and not sure where to install at.
Cam was used in same 327 combo. but with a auto.
Any recommendations on where to degree intake lobe at?

Re: sbc super stock cam question
 

My cam card from Comp cams faded. And recently I needed some info off it that I couldn’t quite read. I called them. Gave them the grind numbers. And they told me what I needed to know. He mentioned I could do it on their website. I guess you can actually get the cam card and print it was my understanding. Out of curiosity. I looked later and tried to find it. But gave up because I had what I needed. But he said it was there. Just a heads up. I waited on hold for 47 minutes as they were very busy the day I called.

Re: sbc super stock cam question
 

Yes I tried calling them also. The message said I was caller #16 in line. After 15 minutes still caller 16. I gave up.
I have not been able to find these lobes or grind # from there website.

Re: sbc super stock cam question
 

Page 88, hxl rollers, comp cams lobe catalog. The specs are listed there.

Re: sbc super stock cam question
 

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.

Re: sbc super stock cam question
 

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.

Re: sbc super stock cam question
 

I had to drive about a hour and a half one day. I just plugged my phone into my truck. And started driving. Figured it was better than sitting in the house waiting fir them to get to me. I will say. They are always very helpful and polite when I call. So waiting isn’t so bad. They can’t help it they are good and busy.

Re: sbc super stock cam question
 

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

Re: sbc super stock cam question
 

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.

Re: sbc super stock cam question
 

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