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The mkiv Supra Owners Club

Fuel system


Steve Cargill

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From what I've picked up the following is roughly true. This is without boost controller, fuel computers or ECU changes.

 

J spec pump & injectors are OK up to about 18PSI (along with the J spec turbos)

 

With hybrids they are only OK to about 15PSI

 

If I put UK 550's and resistor on with J spec turbos there is no benefit and I'm over-fuelling. The fuel pump may also be borderline for this flow.

 

550's with UK pump on hybrids should be OK for 18PSI

 

Done a bit of trawling and come up with the following parts list for the upgrade. Any other biits needed, pipes clips etc etc.

 

Injector 6* 23209-49035

Resistor 1* 28510-46020

Fuel pump 1* 23221-46110

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