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Stratified E30 Tuning – rev 6

The next revision to the Stratified E30 tune includes changes to smoothen spool up and increase top end performance.

In the following charts the solid line is rev 6 and the dashed lines are rev 5. The intake air temperature is close to the same for each revision during the data logging.

Whatever the change was to smoothen spool up it is too subtle for me to detect in the boost data chart with this revision.

Boost and IAT v1.6 and v1.5
Boost and IAT v1.6 and v1.5

Next is AFR which looks to be unchanged.

Boost and AFR | v1.6 and v1.5
Boost and AFR | v1.6 and v1.5

The next chart shows boost and fuel rail pressure, the dip past 5,000 rpm has been present for a number of revisions now.

Boost and Fuel Rail Pressure | v1.6 and v1.5
Boost and Fuel Rail Pressure | v1.6 and v1.5

The LPFP duty cycle is increased slightly starting around the initial boost peak.

Boost and LPFP Duty Cycle | v1.6 and v1.5
Boost and LPFP Duty Cycle | v1.6 and v1.5

Timing continues to suffer from the intermittent traction once boost rises.

Boost and Timing | v1.6 and v1.5
Boost and Timing | v1.6 and v1.5

The cause can be seen in the following chart of Boost and Vehicle Speed, the tire slip starts around 3600 rpm and continues intermittently until almost 5600 rpm

Boost and Speed v1.6
Boost and Speed v1.6

Putting the data into Virtual Dyno. A partial pull was attempted in 4th gear to try and alleviate the traction problem, this is the red line.

Virtual Dyno v1.6
Virtual Dyno v1.6

Not surprisingly, as the tuning process is entering the final phase the changes seen with this revision are small.

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