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The mkiv Supra Owners Club

Another decat Q


CardiffSupra

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a decat on a jap spec will produce 1.2/1.3 bar without the need for a boost controller, a boost controller doesn't lower boost it raises it, but seen as the jap spec turbos cant go highier than 1.2 bar without being under some serious stress. You will however need a FCD to raise the fuel cut from 14psi.

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Will I need a restrictor ring when I remove the cats rfom my uk spec??? I have FCD and HKS Racing Exhaust.

Brad

no, you shouldn't need one.

But you need to check boost anyway, if it goes over 12psi then it might have a boost controler installed or a leak from the hoses around the wastegate. Easy to replace.

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