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The mkiv Supra Owners Club

mines ecu or emange ultimate


TT Paul

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650cc injectors are way too big for BPU, i would Imagen that your not going to get the best from the motor with over spec'd injectors as with smaller pulse width/duty cycle that you're ultimately going to get,

You will see less adequate atomisation, i am only running 540cc with a single turbo, admittedly they flow a fair bit more, but i'm limited to just over 500BHP.

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You will see less adequate atomisation

 

I'm not convinced about that, once they are spraying they are atomising as good as they'll get. 650's are a waste of capacity for BPU but they'll run the car just fine, otherwise idling and low speed tootling would be affected on all Supras that run them (or bigger). With 800+cc you might start getting problems due to the pulse width being too short under the light loads and the injectors behaving erratically. But yeah, I wouldn't have fitted 650s just for BPU.

 

-Ian

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