LS400 Supercharge build questions

[roman400]

If I were to supercharge a 1st gen 1uz or 2nd gen 1uz what kind of gas mileage am I looking at? I can’t find any info on this

 

[Zuffen]

A lot depends on type of supercharger, boost pressure, weight of vehicle and how you drive.

My supercharged engine was returning 45litres per 100kilometres.

I was running 21.5psi, and drove it like I stole it!

 

[ivan129]

A lot depends on when the boost comes on and how hard it runs up in boost. If you're stuffing more air into the engine you have to feed in more fuel. If you double the power output, you double the fuel usage. If you're looking for more power and worried about fuel usage you'd be better off turfing the UZ and doing an EV swap.