by HK1837 on Fri, 21 Aug 2020 6:10 +0000
No different to any engine. You won’t only be dealing with extra boost but extra torque/power.
Mine is running the same setup with a smaller pulley for 6.5psi. I wouldn’t go much higher without upgrades, maybe up to 8psi. Mine was showing about 250kW when it hit the rev limiter (set low), not sure what the flywheel torque is but it is basically flat between 500-600Nm at the rear wheels.
To go higher with reliability you are going to want:
Lower compression.
Forged pistons
Normally stronger rods, not sure how good Toyota ones are.
More fuel capability, so bigger injectors.
Intake upgrade, at least a TRD CAI (no snorkel, loses hp).
Not sure how much more you can tune for with a piggyback ECU.
Have you improved the exhaust? It will make a huge difference. Mine has a full Beaudesert 2.75” system but the trade off is it sounds like cr@p, line a serious wet fart like any V6 does. I’d think about Tradewind’s Tacoma manifolds. Anything to take away that awful V6 sound is worth it.
You may also have backed the wrong horse for that level of boost though. Those belt driven turbo Vortex style super chargers can give big boost if that is what you want. I didn’t go that way as the screw type Eaton blower develops substantially more torque but less hp. From what I understand of screw type blowers if you want big boost you oversize the blower, so instead of an M90 way over driven you run an M112 at a lower speed. Do some reading on it.