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2015+ S550 Mustangs
2015+ S550 Mustang Talk
2.3L Turbo the most interesting new offering?
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<blockquote data-quote="blackvette101" data-source="post: 13745425" data-attributes="member: 130072"><p>Its the direct injection. The car is running very low compression for a direct injected 4 cylinder that requires 91. The fiesta ST requires premium but comes with 11:1 cr. The focus ST and Ecoboost mustang will take regular because of the low CR. As of the current info it says 87 minimum but 91 recommended just like on the Focus ST. So yeah I would venture to guess if you put 87 in it you will lose some hp.</p><p></p><p>Evo, Subaru, Gen1 genesis are all not direct injected so they really serve no purpose in this discussion since their knock limits are much lower then a DI engine.</p><p></p><p>Realistically you can hit 300 hp with about 25lb/min of airflow on a really well designed DI motor. On my old cobalt SS turbo we were seeing just over 10whp per LB/min of airflow and that's with 9.2:1 CR. The rumor is a GT22 which flows 28lb/min I don't see why Ford couldn't hit their targeted goals with 28lb/min. My worry is that the headroom for aftermarket mods with this turbo may max out around 350 crank hp. maybe even less.</p><p></p><p>Ford announced 3.31 gears stock and 3.55 with the performance pack. And the domestic car buyer is going to despise lag. So it only makes sense that the car has a very small and torquey turbo.</p></blockquote><p></p>
[QUOTE="blackvette101, post: 13745425, member: 130072"] Its the direct injection. The car is running very low compression for a direct injected 4 cylinder that requires 91. The fiesta ST requires premium but comes with 11:1 cr. The focus ST and Ecoboost mustang will take regular because of the low CR. As of the current info it says 87 minimum but 91 recommended just like on the Focus ST. So yeah I would venture to guess if you put 87 in it you will lose some hp. Evo, Subaru, Gen1 genesis are all not direct injected so they really serve no purpose in this discussion since their knock limits are much lower then a DI engine. Realistically you can hit 300 hp with about 25lb/min of airflow on a really well designed DI motor. On my old cobalt SS turbo we were seeing just over 10whp per LB/min of airflow and that's with 9.2:1 CR. The rumor is a GT22 which flows 28lb/min I don't see why Ford couldn't hit their targeted goals with 28lb/min. My worry is that the headroom for aftermarket mods with this turbo may max out around 350 crank hp. maybe even less. Ford announced 3.31 gears stock and 3.55 with the performance pack. And the domestic car buyer is going to despise lag. So it only makes sense that the car has a very small and torquey turbo. [/QUOTE]
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2.3L Turbo the most interesting new offering?
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