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-2ND GEN FUEL RAIL LIMIT- [Archive] - Toyota MR2 Message Board

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extremeboost5007-07-2007, 03:22 PM@ WHAT POINT SHOULD I CONSIDER REPLACING OR BORING STOCK FUEL RAIL. HOW MUCH HP CAN I EXPECT WITH STOCK RAIL AND 550cc SUPRA INJECTORS.HAVENT TUNED CAR YET BUT @ BOOST CAR HESITATES AND BACK FIRES. I'M ONLY RUNNING BETWEEN 7 PSI & 10 PSI. MY MODS ARE:
BUILT MOTOR
GT35R TURBO, TIAL 38MM WASTEGATE
SUPRA HOLLEY FUEL PUMP
MSD IGNITION, NGK COPPER SPARK PLUGS
HKS VPC & GCC W/ 550 CHIP, FUEL CUT DEFENCER
HKS HIPER EXAUST & INTAKE driftmonster07-07-2007, 03:30 PMWTF'S UP WITH THE CAPS? LOL
Im pretty sure your fuel rail is fine with the mods you have though :) kblake07-07-2007, 08:25 PMIf you have an upgraded fuel pump, and/or larger injectors, you should bore the rail.

550s are nowhere near large enough for a GT35R. You have 320RWHP worth of fuel with a 600+ WHP turbocharger. You need a full fuel system and a standalone EMS.

Ken extremeboost5007-08-2007, 08:02 AMhey blake, thanks for the reply. very helpful. Powered by vBulletin® Version 4.2.5 Copyright © 2026 vBulletin Solutions Inc. All rights reserved.

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