do a little more research and MAKE SURE there's no restrictor already installed. if there's not, then i believe the general rule is .055-.070. i had a .060 on a t3/t4 borg warner for my 240, and it was cool. you can also call/e-mail turbonetics and ask them the recommended oil pressure needed for the tubo. the pressure coming from your filter housing might be stable enough.




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