308 GTB 3.5-Liter
The goal of this engine was to make the most power possible with stock cylinder heads on a 2-valve 308 engine using the standard Bosch CIS fuel injection system. Ported, larger valve heads can add 20-25 HP.
The CIS version of the 308 2-valve series was infamous for being the weak sister of all the 308 variants. Stock power was in the 185-195 HP range and acceleration was anemic.
We applied our 3.5L technology to this 2- valve engine and were satisfied with the results. The power and torque increases have transformed the driving experience of this 308 to what it should have been from the factory and now it is fast!
Type: V-8, DOHC 2 valve
Bore: Razzo Rosso forged pistons/big-bore
liners, 85mm
Stroke: Razzo Rosso stroker crank, 78mm
Compression ratio: 10:1
Cylinder heads: intake manifold port
matched, new exhaust valves, intake
plenum modification
Camshafts: special Razzo Rosso profiles
for CIS injection
Induction: Bosch CIS fuel injection
Exhaust: standard Ferrari headers, port
match, X-Ost Maranello sport muffler (no
cats).
Ignition: Ferrari electronic ignition
