615awhp 600awtq FP black, Need some advice

[JusMX141]

"Efficiency" is a very vague term that gets tossed around too much, really. There's compressor efficiency, turbine efficiency, and overall efficiency of the turbocharger as a whole...which would factor the function of both the compressor and turbine wheels and the housings they're in. Turbine efficiency and compressor efficiency aren't necessarily related until one is preventing the other from doing it's job properly.

That in mind, I have no clue what you're asking...whether you mean compressor efficiency (which shouldn't be suffering aside from possibly being limited by the turbine wheel/housing) or overall efficiency of the turbo itself is suffering. I think I did a fair job of explaining that the same compressor on a different turbo has no trouble making power.

 

[94laserawd]

Hate to bump an old third but Im looking to change my setup.

Since the last dyno Ive gone to a JM fab intake, 74mm s90, and an ETS 4" front mount with 3" piping but the power still falls off hard on the top end.

My goal is 700+ while keeping the tq under 550.

Right now Im thinking of going to the New dsm 78-64. Its expensive but still cheaper then switching to a full t3 setup

What are your guys thoughts?

 

[diambo4life]

....forget about "bolt on" setups and run a proper T3 or T4 setup. Not only will it make more power but you can easily play with different turbo setups (inexpensively) if you choose to.

 

[Kapok6]

There is a BW S362SX-E on an open T4 on here for a good price. If it was a 364.5 I'd be all over it...but I was told it made 708whp on a mustang dyno.

 

[bling5tatus]

Your motor is clogging up your turbo. I'd upgrade the cams to shift the power band higher if you want power in upper rpms.