Mystery Cam

[vektro69]

I have a 440 6 pack that has a purple shaft cam. Problem is I don’t know which one. Solid lifters, supposed to have dynoed at 520hp. What would be the valve lash settings? Thinking.28??

 

[beanhead]

I have a 440 6 pack that has a purple shaft cam. Problem is I don’t know which one. Solid lifters, supposed to have dynoed at 520hp. What would be the valve lash settings? Thinking.28??

Holy guacamole if you lash at .28 You're gonna have a bad day!

Ha I know what you meant.
For the most part the B/RB cams spec'd at .028 int/ .032 exh.
There were some exceptions, according to this chart-
https://www.mopar1.us/camchart.html

 

[1968rt]

Im running the .528 purpleshaft and it dynoed right around 520HP with mildly ported 915 heads also. Another board member was similar at 520HP 560TQ. Heres his run

 

[vektro69]

528 may be close to what is in there. So, I guess .028/ .032 is probably about right

 

[yella71]

put a dial indicator at the valve and measure the lif. it will get you in the ball park. I always ran my 528 at .020. no issues