Just found this.......
Taken from the Mazda Workshop manual (12/94)
Engine
The purpose of the modification is to increase the low speed torque by changing the valve timing and compression ratio.
The following parts have been modified
The configuration of the camshafts have been modified
Valve timing
IVO 5* BTDC
IVC 40* ABDC
EVO 55* BBDC
EVC 5* ATDC
The configuration of the pistons have been modified
Compression Ratio - 9.0:1
Fuel & Emission Control System
According to the readoptaion of the B6 engine model, the following changes have been made.
Injection method has been changed from the two-group injection to the sequential injection.
IAC load correction has been added according to the addition of the rear window defroster signal input to the ECM.
IGF signal input to the ECM has been discontinued.
Signal names have been changed as follows. NE = SGT & G = SGC
Diagnostic trouble codes No. 01 have been discontinued.
Vehicle speed sensor input have been added.
In the exhaust system, the front pipe and the parts after it are the same as that of the BP engine model.
The heated oxygen sensor has been adopted and its instulation position has been changed.
The fuel tank capacity has been enlarged and the cruising range has been increased accordingly.
Features - Excellent drivability and improved engine performance due to Squential mulitport fuel injection
Have asked seller of car to email me the VIN number
The car will not be an import. It will be a UK registered car from between 1995-1997.
VIN number will be JMZNA18C200 something, something, something, something, something, something.
(The letter C tells you it's a low power 1600, B for high power 1600, P for 1800 or 6 for NB 1600)
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