Sr20vet g20 Primera dyno tuning

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This is a xtrail Sr20vet swapped into a p10 chassis. Stock turbo peaking 16psi at 4000rpms but would loose steam after 5300rpms when the intake vvl would engage. Peak hp numbers of 309whp was at 11.8 psi. 93oct. Fuel nismotronicsa Ecu tuning by gio94sr20ve. Flordia 88f 70% humidity day. Very fun car to drive around
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Any info on why the boost started to creep low after vvl kicked in ? Could activating the exhaust side help keep the boost up(I know the exhaust side has no vvl in the vet but you can swap in the rockers from a p11ve right?)? Or is the turbo maxing out? Great video thanks for sharing your knowledge

nismoboy
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What is the remedy for the loss of boost?

Zionslayer