328 Twin Turbo GTO Conversion

This engine was originally built by Jim Carpenter. It was rebuilt by us and updated. The compression ratio was lowered to 8:1, F40 head gaskets replaced the copper ones (which leaked badly), the engine management was changed to Motec with electronic wastegate control and the fuel system up-rated. This engine ran a conservative 12 lbs. of boost; more power is there for the taking.

Bore: 83 mm
Stroke: 73 mm
Compression Ratio: 8:1
Heads: stock (no flow chart)
Cams: std. factory grind
Induction: twin turbo/intercooled with Motec injection, electronic waste-gate special air box and filter
Exhaust: custom 4-1 headers with open pipes
Ignition: direct coil