| We've tuned several cars here with those turbos to over 670 rwhp without the most extreme mods or the most aggressive timing maps. Dee Ridgeway made 666 and there are others on GT2860RS/Z1 GT675RS/JWT 700BB that have produced similar numbers. It is not unreasonable to say they are capable of 700 rwhp if everything is optimized and they are pushed as far as they will go. We've seen over 700 out of HKS 2530s which are almost exactly the same turbo. The turbine wheel is the exact same wheel and the compressor wheel has the same inducer and exducer dims, just a very small change in exducer tip height. All of the wheels have the same number of blades.
Russell Floyd Z1 Motorsports
www.300zx.com
1990+ Nissan Z specialists Used Parts, New parts, Service/Repair and Performance
Z1 Motorsports Exclusive Parts Line 2877 Carrollton Villa Rica Hwy
Carrollton, Ga 30116 770-838-7777
770-832-9253 (fax) 
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