TOYOTA - Mk3 Supra - Turbo

Turbo

  • Turbocharger
  • Difficulty(0-5): 3
    Time: 1-2 hours
    Tool Specialty(0-5): 3
    Power Increase Over Stock: Varies
  • Intercooler
  • Difficulty(0-5): 4
    Time: 1-3 hours
    Tool Specialty(0-5): 4
    Power Increase Over Stock: 10-50 WHP
  • Wastegate/Boost Controller
  • Difficulty(0-5): 3
    Time: 1-2 hours
    Tool Specialty(0-5): 3
    Power Increase Over Stock: Varies

Turbocharger

The Turbo of the Supra is its party piece. The CT-26 is one of the largest Turbos ever fitted to a mass production automobile even as of 2012. The Buick Grand National had a huge turbo as well, but aside from that vehicle there are nearly no other factory vehicles that offer a single turbo sized quite as large as the Supraís CT-26. Many manufacturers turned to a twin turbo setup if they wanted more power than a small single could offer.

Upgrading the CT-26 becomes necessary if you want anything more than ~13-15 psi in its stock form. Once you push a stock CT-26 past this point you wonít gain much power, but you will increase air temperature quickly. If your goals are more than 350 WHP you will need to consider a modified CT-26 or an aftermarket Turbo.

Intercooler

The factory Supra intercooler can be upgraded to many newer, more efficient options. Cartech, HKS, Spearco and many others have made excellent upgrades to increase cooling efficiency and allow more flow.

Boost Controller

The Factory wastegate of the MK3 Supra is set to limit boost pressure to approximately 7 psi. The design of the wastegate is such that a larger elbow/downpipe can allow the exhaust gas path to flow more freely than the wastegate path. This allows higher boost pressures. Another, more controlled way to increase boost pressure is to add a mechanical or electronic boost controller. This is a device that tricks the wastegate into thinking the turbo isnít spooled up yet and that there is no need to vent off exhaust gas. This allows the user to control the boost level and quickly add power. You need to be careful as there are NO SAFEGAURDS that can save your engine from many instances of fatal damage once youíve over-ridden the factory wastegate. If a boost controller fails and remains closed youíll have runaway boost pressure and a dead engine in a matter of seconds.