[Shotimes] Re: Cam timing info needed

[Mark Nunnally]

> Joshs site leads me to belive the MTX cams have 203 degree lobe centers
> (crankshaft degrees) which would lead to 101.5 degree lobe centerlines on
> both I & E if they are indeed factory installed straight up. But maybe they
> were, and maybe they weren't.
> I guess Ian & I will measure one to know for sure.
> Then on the ATX cams, there seems to be a an extra 4 degrees (crank) , but
> is the E advanced or the I retarded? Again I've heard 2 stories. I would
> tend to think the E advanced to help the torque. Make sense?

Or with a slight retard they were looking to pick up a little top end lost
from the lower lift?

When I dynoe'd the 3.2L with stock cams in various settings (adjustable
sprockets) advancing lost tq everywhere.  Retarding lost a bit (10 ft/lbs
peak at -6 degree) but shifted the whole curve north, so WHP was increased
peak by 7 whp @ 6200 rpm.  Sort of a poor man's "big cam" track day quickie
mod so long as you stayed above 4500 rpm.

I've heard 107-111 centerline numbers through the years.  Who knows.  I
dropped my 40's in straight up.  I promply went ~2 secs quicker a lap at
road atlanta.  Maybe I could pick up another second with some dyno tuning
and cam timing.  I need a crew chief (I'd rather just drive)  :)

mark