<VV> CRANK TIMING help

[Bryan Blackwell]

Hi Tim,

First, you can much more easily change the cam timing with offset  
keys on the cam.  If you have an old gear (probably a safe bet in  
your case :-) you can open the hole up a little so it's a slip fit  
and use that to degree your cam the way you want it.  Now, the 140PG  
was set up with the 95 cam, so they actually retarded the cam to get  
better top end out of the low performance cam.  Given that you're  
using an OT-10 and trying for more low end, this might not be what  
you want.  Doing the advance or retard on a cam moves the torque  
curve up or down (within reason), advancing moves the curve lower,  
retarding moves it higher.  This article may help explain cam timing:

http://www.compcams.com/Technical/TimingTutorial/

--Bryan

On Aug 25, 2008, at 7:20 PM, N2VZD at aol.com wrote:

> has anyone used a crank gear offset key to end up with the same  
> results as  a
> 140 pg crank? i know they do it to chevy sixes to get a low end torque
> sometimes. anyone tell me if its really a bad thing?  how much?    
> 2?  4?
> which direction?  i want to get the best i can out of a 164 engine   
> with 110
> heads , with a powerglide. this will go in the rampy. i will be  
> using  the
> otto parts OT10 cam.
> this kind of stuff is confusing me now...so if i cant get answers i  
> may  just
> go with stock setup and hope for the best.
> cheers , tim colson