Car- ae86 sprinter
motor - 4age 20v ST from ae101

Hey all i am running a standard ECU for my ST
i am trying to hook up a vehicle speed sensor so i don't have the 7200 rpm limit / fail safe mode on all the time

i will be purchasing vehicle speed sensor piggy back adaptor for my T50 trans to give the ecu what it wants, how ever i need to find out what pulse per revolution does the standard vehicle speed sensor put out from the ae101?

i have tried connecting reed switch from my cluster to ecu but with no luck,

i have read 3 different pulses that it could be from sources off the net.
2 pulse/ per rev
4 pulse / per rev
and 10 pulse/ per rev

if anyone could confirm which it is , that would be fantastic!
i am dieing to drive my 86