Toyota Supra User Booklet page 93

Charge Air Cooler [Intercooler]
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This turbocharger system adopts an air–cooled, tube type charge air cooler [intercooler] located in the front part
of the right front wheel housing.
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Large–diameter air tubes and hoses are used to accommodate large airflow and reduce its pressure loss.
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The charge air cooler [intercooler] tank and air tubes are made lightweight using plastic.
3. Operation of Twin Turbochargers
In this system, the separate functions of the two turbochargers are achieved by controlling the operation of the No.
2 turbocharger. This is accomplished by using control valves to allow or stop the intake air and exhaust gas flow.
Although the No. 2 turbocharger's basic start/stop operation timing is determined by the engine speed as illustrated
below, the timing is varied according to the engine load.
No. 2 turbocharger start controlA
Region "A" : low rpm, low engine load
Region "A" : high rpm, high engine load
TC1 : Only the No. 1 turbocharger operating
TC1 + TC2 : Both the No. 1 and No. 2 turbochargers operating
ENGINE — 2JZ–GTE ENGINE
No. 2 turbocharger stop controlA
Charge Air Cooler [Intercooler]
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