| My Z made 604rwhp using stock internals. It lasted for quite a while. Same turbos as you using JWT's 740cc Dual POP program with a high/low octane switch. Made 620rwhp/565rwtq with the same basic set up just with an Ash ECU so did a wee bit of tuning to get the extra rwhp. Motor is built now... Above was race fuel. 557.65 rwhp and 491.08 rwtq on pump fuel at 18.4 psi boost. Turned it up a wee bit and some timing tweaks. It made 577.20 rwhp and 498.40 rwtq at 19.0 psi of boost using pump fuel. It was 94 octane pump fuel. This was with the Ash ECU, and again was tweaked to get there. It was also on a built motor...
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