| I have set-up similar turbo as disco potato Garret GT2860R (60 trim & 60 A/R on compressor and 76 trim & 86 A/R on exhaust) except they are running on bushings (not bearings) as the stock one. Is someone know how much would be the max psi of boost with 555 injector capacity (have Apexi AFC-1 to set them to max fuel supply). I don't expect to run over 18 psi with 94 octane and won't go over 550 HP at engine with a stock short block but I'm not sure if the 740cc injector flow will be required or safer at this boost level and old style fuel rail. Thanks for a rapid answer, I should install back my top plenum tomorrow... Qcsolo
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