Precision Turbo and Engine BigStuff3 GEN3 Powertrain Controller Ignition Setup Tutorial - Manual (Page 29)

The cam signal occurs
11
o before the crank
signal
The crank signal occurs
11
o
after the cam signal
Setting the Crank Reference for Coil-0n-Plug Engines (not for distributor based engines)
With COP systems the crank reference values will be from about 330 to 370. For example, since the
crankshaft (balancer) was moved 10
o
after TDC (ATDC) subtract 10
o
from 360
o
(360
o
- 10
o
= 350
o
)
and input 350
o
into the Crank Reference input box as shown below. If the crankshaft (balancer) was
moved 10
o
before TDC (ATDC) add 10
o
to 360
o
(360
o
+ 10
o
= 370
o
) and input 370
o
into the Crank
Reference input box. The value for the Ford Mod Motors is typically about 329.
28
“Crank Reference”
window (for coil-on-
plug applications only)
in the BigComm
“Operating Parameter
Configuration”
Window. 329 for the
Ford Mod Motor
COP Engines
For the LS1 COP engine
the value must be 24.
For the LS2 and LS7
COP engines, the value
must be 58. The Ford
Mod Motor COP engine
the value must be 36.