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Rb25Det Missing Underload

johnny boii

By johnny boii,
in Western Australia

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johnny boii Enthusiast

johnny boii

Posted
Posted (edited)

hey guys i have what i believe to be a 1.5 series r33 with a rb25det in it

i fitted a rebuilt and hiflowed stock rb25det turbo to it after i did that the stock boost raised from 7psi to 9 psi i had no issues was running fine.

the other day i fitted a turbosmart boost tee into the equasion so i could raise the boost to about 12 psi once i had fitted my fmic

i fitted the boost tee having alot of trouble then realised that i had to take the ball and spring out of it to allow it to run on my engine.

now my issue is that once i raise the boost to about 12psi under wide open throttle it misses and feels like it is fuel cutting like it completely shuts down the engine for a millissecond and comes back on but only half throttle it boosts fine. when i turn the tap fully closed then open it about a half a turn it runs the stock 9psi and drives fine

i have replaced the plugs the day i fitted the boost tee

any help would be fantastic please help ahahah :D

Edited by johnny boii
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JonnoHR31 Grand Master

JonnoHR31

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Posted

it'll help but its not ideal and you certainly wont be able to get the most out of the highflow. a full aftermarket computer and possibly z32 afm and injectors, depending on power goals and the ecu, is the best solution.

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