tacchi88 said:
Had 900+ hrs. with LASAR on my Arrow when sold. It had the temperature probe, and the more information the computer can absorb, the better LASAR is able to perform. Without the probe, timing reverts back to base timing above 2500 rpms, where as with CHT it works throughout the entire range.
I beg to differ. The only thing the CHT probe does is to begin to retard
the timing once the engine gets to a CHT of 450. The probe was designed
for Certified aircraft. It's not needed in our experimentals. Without it, you
control the CHT temperatures by increasing mixture, reducing power or a
combination of both. Without the probe the timing continues on it's merry
way to 45 degrees BTDC as MP and RPM dictate along it's fixed timing curve.
You have no control over it save for the MP and RPM input, which you do have
control of. This is one of the reasons I ditched my LASAR system and went
with P-mags. Soon enough, we will be able to control timing from within the
cockpit with P-mags. And we can affect the timing advance now on the
ground.
As stated before, make sure you ask for the "brain box" which does not
require the CHT probe. If you would like, I will sell you my complete LASAR
system for a bargain basement price. I have yet to find the time to put it
on e-bay. It's a great system but I wanted something more "experimental"
that I could manage my CHT temps with, hence the P-mags. And I'm talking
basement prices here. New LASAR sytem is $2500. I'll sell my system that
only has 25 hours on it for $1250 complete. Pls, contact me offline.