I haven't quite completed everything on the build, but assume the following:

S256et turbo with pretty much everything else upgraded to the max. (intake, exhaust, pistons, rods, transmission, etc, etc.)

My question is not what will break first, but what will be holding me back? I have stock fuel delivery/injectors with zzp cams (upgraded fuel lobe), but nothing extra (5th injector or otherwise). Assuming everything else can handle infinite power, will I be able to max out my turbo's potential before fuel delivery can't keep up if I run E85 or E47?

In a hypothetical perfect build, will a stock fuel system + bigger cam fuel lobe be maxed out before my turbo (s256et) reaches its full potential?

 

Just the bigger cam fuel lobe but no Opel injector upgrade meth injection or 5th injector. You should run out of fuel before airflow on e85. Being limited by fuel you would probably make more power on e47

 

How about with just Opels, bigger cam lobe, and E47, probably still run out of fuel delivery first? Is everyone that's running a bigger turbo using a 5th injector or meth injection setup to get the most out of their turbo?

 

I was running E30 on the EFR turbo at 30 psi. my fueling was at limit there but I wasn't running a 5th injector, Opels or even the cam lobe.

 

Kmo will probably chime in, he should know

 

Don't forget you're at altitude, our fuel demand is a little different

 

This^ shame you have bigger lobe but not the injectors.