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Honestly, I'd say you DON'T want to port the stock TD04 flapper. TD04 turbine backpressure will be very high, and every TD04 I've ever experienced has had boost falloff already. There's no concern of boost creep if it can't help but drop pressure to redline already.

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The Pansy Patrol - a 3000GT/Stealth car blog with how-tos

Pearl Yellow 1994 R/T TT w/84k - FOR SALE! new 4-Bolt factory short block, DR StgII heads, Titan TD05 headers, 14B turbos w/ ported 7cm^2 housings, 3" minimum-bend catless exhaust, SCE oil pan, RPSII clutch, Fidenza flywheel, OZ F1 Plus 17x9.5" wheels, Kumho Ecsta MX 245/45 tires, Drweldin DSM SMICs, 3SX engine mounts (Maximal solid front), GReddy 60mm P/H/W boost, Carbotech Panther Plus & Bobcat pads w/ slotted/drilled rotors, KSport GT-Pro coilovers, Maximal rear camber arms, SCE balljoints, ABS delete w/ cockpit-mounted Wilwood proportioning valve, AC delete, EGR/evap/dashpot delete, cruise/vacuum-tank delete, '95 Lexan headlights, McCulloch 4300K HIDs, GReddy Type-S BOV, solid shift bushings; Misc Parts: Walbro341, 20# fixed-back seats, Accelerated Moto catch can

10-07-2005, 03:22 AM	#55 (permalink)
Multiades vehicular thaumaturgist Join Date: Apr 2000 Location: Woburn, MA Drives: 1994 Stealth TT Trader Rating: (17)	Re: Measuring stock exhaust restriction Honestly, I'd say you DON'T want to port the stock TD04 flapper. TD04 turbine backpressure will be very high, and every TD04 I've ever experienced has had boost falloff already. There's no concern of boost creep if it can't help but drop pressure to redline already. __________________ The Pansy Patrol - a 3000GT/Stealth car blog with how-tos Pearl Yellow 1994 R/T TT w/84k - FOR SALE! new 4-Bolt factory short block, DR StgII heads, Titan TD05 headers, 14B turbos w/ ported 7cm^2 housings, 3" minimum-bend catless exhaust, SCE oil pan, RPSII clutch, Fidenza flywheel, OZ F1 Plus 17x9.5" wheels, Kumho Ecsta MX 245/45 tires, Drweldin DSM SMICs, 3SX engine mounts (Maximal solid front), GReddy 60mm P/H/W boost, Carbotech Panther Plus & Bobcat pads w/ slotted/drilled rotors, KSport GT-Pro coilovers, Maximal rear camber arms, SCE balljoints, ABS delete w/ cockpit-mounted Wilwood proportioning valve, AC delete, EGR/evap/dashpot delete, cruise/vacuum-tank delete, '95 Lexan headlights, McCulloch 4300K HIDs, GReddy Type-S BOV, solid shift bushings; Misc Parts: Walbro341, 20# fixed-back seats, Accelerated Moto catch can