The difference in the stage 1.5 is the 30% over larger nozzles. The 30% nozzle allows more fuel to exit the injector quicker into the combustion cycle which increases horsepower even further. The injector has a limited time to inject fuel into the cylinder for the combustion cycle. We measure this time in milliseconds. With a larger nozzle we can inject more fuel per millisecond into the cylinder for combustion, which creates more power. The downside to a larger nozzle is the extra fuel creates more heat and black smoke. So the larger the nozzle the more EGT's are created and the need for more air upgrades are needed.
This is a journal bearing turbo with a Borg Warner 300sxe Style turbine wheel, modified to fit inside a drop in ready obs turbo. This turbo will surprise you at how well it runs! We have torture tested it for longevity and proven its capability on the dyno.
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