Engine: Description and Operation

Fig. 42 Section view of Garret-AiResearch T3 type turbocharger:

Fig. 43 Turbocharger water cooling system:

Engine
Similar to the normally aspirated engine, many components were upgraded to withstand the more than 50% higher power generated by the turbocharger.

Upgrades From Normally Aspirated Engine Include
- More durable intake and exhaust valve materials
- Better sealing piston rings
- Larger capacity oil pump
- Select-fit bearings
- Revised camshaft
- Dished piston tops--to lower compression ratio

Turbo Construction
Garrett-Air-Research T-3 center housing and wastegate assembly--with Chrysler built compressor and turbine housing, and exhaust outlet elbow.

Turbo Operation
The wastegate is calibrated to regulate maximum boost pressure at 7.5 psi.

Turbo boost begins at 1200 RPM, rises to 7.2 psi at 2050 RPM, and peaks at 7.5 psi at 6000 RPM.

Turbocharger incorporates a water cooled turbine end shaft bearing to lower bearing temperatures--especially after hot shut-off--to increase durability of the turbocharger.