which ecu will give best performance with a b18 in my 91 hatch? i was running it on an si and it felt fine , today i got a pr4 90-91 ls and that is ok but it almost felt like si was a lil faster for some reason. maybe not thought i dunno.. i also have a pg7 ecu. which would be best?

 

Pr4 is the correct ecu..The SI ecu is made for a Sohc 1.6L..So its not perfect for the 1.8L dohc B18

 

Run the OBD0 Pr4 with the LS. Your PM6 may run your LS a little lean since its for your 1.6 SOHC engine.

 

My friend runs the PR4 with an 94 LS motor.