AEM Infinity or Pro EFI to control a turbo S54? Saad Racing built Precision 6766 turbocharged and Pro EFI controlled E46 M3 S54 shows 667 whp on 11 psi
The two most popular standalone ECU choices for forced induction BMW E46 M3's are the AEM Infinity and the Pro EFI 128 systems. Saad Racing leans toward the Pro EFI system and this is one of their recent creations. The dynograph below is from an E46 M3 with a Precision 6766 turbocharger on a built motor. On very low boost, 11 psi, the motor shows 667 to the wheels on a Dynojet. On high boost this should be capable of over 900 horsepower to the wheels although BimmerBoost certainly would like to see this car do it.
The Pro EFI system is doing a great job controlling motor and the AEM Infinity system has shown great results as well. So which is better? It likely depends on what your tuner is most comfortable with as either one is more than capable of handling a turbo E46 M3 S54.
Undercover racing is going for the S54 horsepower record
using a Pro EFI system which is plug and play. The AEM Infinity system is also a plug and play complete ECU
and offers features like a three-step rev limiter, traction control, anti-lag, and map switching.
. It looks like you can't go wrong with either.