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i was looking at some sites and i have heard of people running 20 psi on stock turbo and wastgate. i also know that people w/ t-birds use the same turbo's and run 25 psi. so would 15 psi really be harmful....(just a Q. im not sure)

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My 1989 toyota supra mods:83.5 mm bore, ARP main studs, ARP rod bolts,rings, Cometic .060" headgasket, ARP head Studs, Ferra 1 mm oversized valves, port work, Rc 550cc injectors, Walbro 255hp
Turbo: 1.15 A/R T4 twin Scroll turbin - journal .60 A/R compressor, Hallman Pro MBC, Turbo XS Blow-off Valve, 50mm wastegate, hks fcd
Intercooler: 32x12x3 core, 3 inch piping, with clampco t-bolt clamps
Exhaust:Exhaust manifold T4 twin scroll,2JZ 3 inch downpipe Fabed up to fit, Mandrell bent 3in back

04-25-2007, 04:34 PM	#23
Supra_87_mk3 3" Exhaust Join Date: Apr 2007 Location: tiffin ohio Posts: 76	i was looking at some sites and i have heard of people running 20 psi on stock turbo and wastgate. i also know that people w/ t-birds use the same turbo's and run 25 psi. so would 15 psi really be harmful....(just a Q. im not sure) __________________ My 1989 toyota supra mods:83.5 mm bore, ARP main studs, ARP rod bolts,rings, Cometic .060" headgasket, ARP head Studs, Ferra 1 mm oversized valves, port work, Rc 550cc injectors, Walbro 255hp Turbo: 1.15 A/R T4 twin Scroll turbin - journal .60 A/R compressor, Hallman Pro MBC, Turbo XS Blow-off Valve, 50mm wastegate, hks fcd Intercooler: 32x12x3 core, 3 inch piping, with clampco t-bolt clamps Exhaust:Exhaust manifold T4 twin scroll,2JZ 3 inch downpipe Fabed up to fit, Mandrell bent 3in back