Mapping Session

[yr51ocw]

Had a day at the local rolling road booked last week to finally map a DTA S40 ecu that I have had sitting around for too long. The engine spec:

- JP4 engine
- J4 cams
- Ported Head
- Raceland Manifold
- Custom Exhaust

Few pics from the day:



Steady state power curve with Magnetti Marelli ECU vs. DTA after mapping, this is wheel torque/power measured after a 10 second stabalisation time, and not a transient run:
http://i87.photobucket.com/albums/k139/boni_1986/Mobile%20Uploads/SteadyStatePowerCurve_zps78f27d4b.jpg

Transient power curves from the rolling road (pinch of salt needed):

Flywheel power and AFR
http://i87.photobucket.com/albums/k139/boni_1986/Mobile%20Uploads/ax1_zps11bc16f9.jpg

Flywheel Power and Torque
http://i87.photobucket.com/albums/k139/boni_1986/Mobile%20Uploads/ax2_zps01722792.jpg

Wheel Power and Torque
http://i87.photobucket.com/albums/k139/boni_1986/Mobile%20Uploads/ax3_zps24cf3750.jpg

Some pictures of the final maps:

Injector Duty Cycle:
http://i87.photobucket.com/albums/k139/boni_1986/Mobile%20Uploads/SmoothedDutyCycle_zpsfc1b032c.jpg
Injection Pulse Width Map
http://i87.photobucket.com/albums/k139/boni_1986/Mobile%20Uploads/SmoothedInjectionPW_zpse49d0bde.jpg
Ignition Map
http://i87.photobucket.com/albums/k139/boni_1986/Mobile%20Uploads/smothedignitionmap_zps37ac72ed.jpg
Target Lambda
http://i87.photobucket.com/albums/k139/boni_1986/Mobile%20Uploads/TargetLambdaMap_zps11c13e22.jpg

Homemade knock detector:
http://i87.photobucket.com/albums/k139/boni_1986/IMGP1141.jpg

The office for the day:
http://i87.photobucket.com/albums/k139/boni_1986/Mobile%20Uploads/photo1_zpsa691f3da.jpg

On the rollers
http://i87.photobucket.com/albums/k139/boni_1986/Mobile%20Uploads/photo2_zps07c5e9bd.jpg

[raunchz]

Good result for a dta vs oem ecu comparison! Just shows there's a pretty good increase in performance to be had from a mapped ecu vs oem

[Ross]

Excellent result. I'd like to see more cars show a steady state run rather than transient graphs. Would be interesting, especially on some of the high powered cars :)

[yr51ocw]

Im hoping to re-plot the transient power curve data and put it all on the same graph to show the difference between steady state and transient, and to highlight the pitfalls with rolling roads.

The problem with doing steady state power curves is that the cooling system of the vehicle and the fans of the rollling road need to be working very well to control the coolant temps. Even with only 100ish BHP the coolant temp was creaping up after 10-15seconds, but the fan at the front of the rolling road left alot to be desired.