Has anyone put a turbo on a 944s2?

[thelowestone]

if you are worried about starving the motor of fuel add a fmu and increase the fuel pressure to in effedct over load the injectors and they can be adujusted and are in some cases vacume / boost sensitive

[Fast951]

Originally posted by AaronM
I guess I'm just overthinking. I had thought that the ECU would need to read manifold pressure and compensate for boost with increased fuel. I mean, you can have the throttle wide open and the AFM maxed out and still not be on full boost pressure meaning that there would need to be enrichment past what the AFM calls for as boost builds. Then again, at WOT it's full rich anyway now that I think about it since the TPS bypasses the AFM at WOT...

Never mind, I think I see now.

The stock 951 does not take boost into account for calculating timing or fuel. It relies on the AFM signal, which has many shortcomings.. Once the AFM (barn door) is open, the voltage sent to the DME is the same, be it 13psi or 25psi boost.. AFM is maxed out.. This is why we convert all modified 951s to a MAF setup. A properly designed MAF will allow you to alter boost, and with the proper code the DME will capture it (more boost = more air flow) and will always calculate the correct fuel & timing..

[thelowestone]

what all do u change when u got to a maf system and do you got to a blow through or suction type meater

[AaronM]

Originally posted by Fast951
The stock 951 does not take boost into account for calculating timing or fuel. It relies on the AFM signal, which has many shortcomings.. Once the AFM (barn door) is open, the voltage sent to the DME is the same, be it 13psi or 25psi boost.. AFM is maxed out.. This is why we convert all modified 951s to a MAF setup. A properly designed MAF will allow you to alter boost, and with the proper code the DME will capture it (more boost = more air flow) and will always calculate the correct fuel & timing..

Yeah, I could easily see how a MAF would be able to calculate total air flow but knew that the AFM couldn't.

Thanks for the confirmation.