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Old 11-10-2006, 11:54 AM   #7
usdm180sx
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I just dyno'd mine. The car was tuned at HKS USA on 91 octane pump gas (since that's what it will be running most of the time) and at 16.9 lbs of boost (1.15 bar). They had to limit it there since the b/c started spiking. Here is the graph:



GT-RS is ismilar to 2871r .64. The motor has the following mods:

• S14 SR20DET
• Apex N1 exhaust
• CP Pistons (86.5mm Bore, 8.5:1 CR)
• Eagle H-Beam Rods
• Apex 1.1mm head gasket
• ARP head studs
• ARP exhaust manifold studs
• Blitz Stainless Steel downpipe
• Blitz SBC iColor Boost Controller (With wideband a/f and water temperature gauge)
• Exedy Hyper Single clutch
• Kazama Stainless Steel 80mm test pipe
• Greddy valve springs
• Greddy rocker arm stoppers
• Greddy intake manifold
• Greddy racing suction metal intake pipe
• Crower titanium valve retainers
• Greddy S14 hotpipe
• Greddy RSPL HG FMIC
• Megan Racing Turbo Extension
• HKS GT-RS turbo
• HKS 256/264 step 1 cams
• HKS stainless exhaust manifold
• HKS FCon VPro
• HKS Universal Power Flow filter
• HKS mechanical boost gauge
• HKS SSQV Blow off valve kit
• SARD adjustable fuel pressure regulator and fitting
• Tomei/NISMO 740cc injectors
• Tomei fuel pump
• Tomei 70mm Throttle Body

These turbos are designed for RESPONSE. Their efficiency levels off at around 19-20lbs. While it is possible to get 400 on these turbos I'd recommend a bigger turbo at lower boost.
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