Phil, Dont mess about making one - Buy one pre-made and calibrated !
There are several on the market but the more you pay the better it will be.
Also, I dont need to tell you make sure it uses a sensor that has
AT LEAST 5 wires.
It makes false economical sense to save a few quid when it could prevent
damage to a £3000 engine. (or what ever it cost)


To answer your SMS text message you sent me.....
The map I will supply you for the S8 ecu was from a 520 Bhp engine
using 8 803's and T4 hybrid with a roller bearing core and made 520 bhp.
This map will do to get you running.
I will add 4 safety features which you can easily disable at your leisure
and at your own risk.
1) FUEL OFFSET INCREASED TO ENSURE RICH MIXTURE ON BOOST
2) IGNITION RETARD OFFSET
3) REV LIMIT 7000 rpm.
4) BOOST LIMIT 28 psi