In my ever lasting quest for exploration I decided I wanted to see how well a MAF based setup would work on MS3

The spec of the car is UK 99 NB 1.8
Fabricated Log Manifold
2.5" Downpipe
Subaru WRX TD04-13T
Bosch EV14 650cc/min Injectors
M20 Fuel
MSLabs MS3 Mini

The MAF install is simple and reversible, MAF connector adapts to the Bosch EV connector for my original IAT and the stock MAF Conenector. 2.5" Blow through on the cold side IC pipework in the straightest portion (Straight after a 90deg elbow off the TB) using an 02-05 UKDM Subaru STI MAF



Started with a stock Subaru MAF scale interpolated/rescaled to suit the 64 point MS3 MAF Curve and after 3x5-10 minute road logs with a couple of 3rd gear pulls this was the result



I'm seeing around 4.6V peak on the MAF with a 170kPa boost target which at higher RPM is a fair bit short of my normal 200kPa target so I now need to investigate using MAF/MAP Blend.

 

Very cool

Gotta love how easy fuel tuning is with mass airflow

 

Its super simple, 10-15 minutes to setup a Histogram/Table generator and a couple of custom fields in MegaLogViewerHD and it takes 30 seconds to analyse a log and rescale the MAF.

Bumped the boost up to 12psi with a new peak of 4.7v (215g/s) so the setup may just have enough headroom for my normal peak boost