308 QV 3.5L Stage 1

308 QV 3.5L Stage 1

Designed as a “sleeper” engine, this 308QV retains the stock Bosch CIS fuel injection and Marelli Digiplex ignition systems.
Built with special Razzo Rosso 85mm steel sleeves/forged pistons and a specially modified 355 77mm stroke crankshaft, this engine displaces 3.5 liters.
The cylinder heads were suitably modified for more flow with oversize intake valves and manifold matching.
Camshaft selection was critical and a CIS friendly grind was picked after considerable engine simulation work.
This is a great street engine - smooth and powerful.

Type: 308 4-valve/3.5L
Bore: 85mm
Stroke: 77mm
Compression ratio: 10.3:1
Cylinder heads: ported/matched manifolds. Larger (31.1mm) intake valves
Camshafts: special Razzo Rosso CIS-QV grind (9.5mm/9.1mm lift)
Induction: Ferrari/Bosch CIS fuel injection
Exhaust: stainless steel Larini QV headers (Euro-version) and X-Ost sport muffler (SS)
Ignition: Marelli Digiplex with modified advance