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400hp on a GT28R? Maybe in fantasy land.
You want personal experience? My setup is good for 400 hp (if i had larger injectors). S14 Sr, CP forged pistons (86.5 mm, 8.5:1 CR). HKS step 1 256IN/264EX cams. Top mount tubular manifold, 38mm Ext. gate, Turbonetics t3/t04e. .48 a/r exhaust housing and special GT style wheel. 50-trim compressor. I currently have 550cc injectors, swap for 720s and safely enjoy your 400 rwhp. On race gas of course. Fuck that 91 dog piss we get.
Oh, i have a personal thing against big garrett turbos. They have small shafts and small turbine wheels with big compressors. They fail very often and you are left with an expensive paperwieght. IMO if you are going big, get a properly sized shaft so handle those thrust loads.Turbos i recomend: t3/t4s, 20G, 25G, 60-1s, etc..
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