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Message: [QUOTE="Swaan, post: 1082295, member: 5517"] The 66/73/91 is a box Borg warner s366. They work great on a 7.3 with 175/80 injectors. Spool up was okay. It towed fine, had great top end!! But if your gonna stay at a stg 2 level injector 160/80, or 175/80. And if you tow a lot. A s300 turbo in the 64 mm range with a 68/76 turbine will spool sooner and keep egts cooler in the lower rpm range. I've had both chargers , and yes the 366 pulls harder 2500 rpm and up. But if you want a fun street truck that pulls really hard in the upper rpm range a 66 mm s3oo with the bigger 74/80 turbine is better. And can still tow just have to keep the rpm up 200-300 higher. Now if your thinking of going diffrent injectors like hybrids then this does not apply. I've talked to reed at works turbochargers and they can put an aftermarket 67.7 mm compressor wheel in a s300. Something like that they would just take a box s366 and machine out the cover to accept the bigger wheel. [/QUOTE]

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