This M20 E30 325 came in with Stage 3 Modifications, all we had to do is tune it. difficult with a dying TPS
My E30 323 supposedly has a 2.7 low compression
motor in it
Run 3 is actually run 2 after we modified the exhaust with an X-piece for more torque
Run 2 is the final run done yesterday after my MAF conversion and tuning that using the Unichip
Now with the M52B28 motor in it:
The graph above a fully modified (Head, zorst, cam, tune) M20B25 with raised RPM against the stock M52B28 with a tuned header exhaust.
Quite an impressive power difference
Since the ECU was not seeing Full throttle between 1500 and 3500 rpm I had to removed the Oxygen sensors and shorted them out on the ECU, to tune it properly.
The advantage was going far leaner than Stoiciometric at part throttle.
So far I had gotten 7km/L worst 9.76 best on long road average 8 km/L = 18.8 mpg over 4000 kmís. So hopefully these consumption figures can be bettered
The old M20B23 motor gave me 6.88 km/L= 16 mpg at best
Read about this Car.
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