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Message: [QUOTE="Charles, post: 259667, member: 103"] With 238/30 injectors and a 44mm Tial gate on the 38R I could not call for much fuel without running 50 to 60lbs with a GT47-88 first stage running a 1.39 A/R and a 1.15 on the 38R. With a 44mm Tial on both it still took massive duty cycle to keep the chargers at 60psi with some 200% nozzles. Now with a GT55 in place of the 47 with a 1.12 housing and the same gates the truck can't run below ~80psi at WOT with definite fuel delivery issues. If not for total pressure control, you will at minimum need a gate on the 38R just to keep it from making so much pressure that it's doing all the work and spinning itself to death. I would recommend a 60mm gate. [/QUOTE]

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