Ferrari 308 GT4/358RR

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Model: 1978 Ferrari 308 GT4

Project Overview:  This GT4 was purchased by our customer in need of a restoration. Carobu was enlisted to rebuild the car mechanically. The V8 engine was rebuilt into one of our larger displacement 3.5-liter motors while retaining the original Weber 40 DCN downdraught carburetors. The handling of the Ferrari was improved with the addition of a Razzo Rosso Koni coil-over conversion. Euro 308 Quattrovalvole 16-inch wheels were also installed. This car was featured in Forza Magazine after its completion.

Engine Specs:

279.73-hp @6600-rpm and 240.91 lb-ft of torque @5300-rpm

Click here to see details and dyno sheet on this motor.

Type: V-8, DOHC 2v/cylinder
Bore: Razzo Rosso forged pistons and big-bore liners, 85mm
Stroke: Razzo Rosso stroker crank, 78mm
Compression ratio: 10.5:1
Cylinder heads: intake ported and matched, new stainless steel exhaust valves
Camshafts: special Razzo Rosso profiles
Induction: 4 Weber 40 DCN carbuetors
Exhaust: standard Ferrari headers, port matched, X-Ost Maranello sport muffler
(no cats).
Ignition: Ferrari points/coil type ignition

Suspension and Brakes:

Suspension: slightly stiffer springs, revalved Koni shocks with coil-over conversion, lowered ride height. Larger rear swaybar to balance handling with staggered wheel/tire combination.
Brakes: Stock rebuilt

Wheels and Tires:

Wheels: 7x16” front and 8x16” rear 308 Quattrolvalvole wheels
Tires: Bridgestone Potenza RE70 Sport

Ferrari 308 GTS/358RR

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Model: 1981 Ferrari 308 GTSi

Project Overview:  This 308 GTSi was converted into a 358RR at the request of a Denver, CO customer. In addition to the larger 3.5-liter Razzo Rosso engine the customer had us upgrade the chassis for improved performance as well. Handling was greatly improved thanks to an adjustable coilover suspension, particularly when paired with the larger 17x8-inch front and 17x8-inch rear Compomotive alloys. The brakes were also upgraded with larger Girodisc rotors at the front and high performance Wilwood calipers at all four corners.

Engine Specs:

251 lb-ft of torque @5000-rpm, 280.29-hp @6500-rpm

Click here to see details and dyno sheet on this motor.

Type: V-8, DOHC 2v/cylinder
Bore: Razzo Rosso forged pistons/bigbore liners, 85mm
Stroke: Razzo Rosso stroker crank, 78mm
Compression ratio: 10:1
Cylinder heads: intaked ported and matched, new exhaust valves, intake plenum modifications
Camshafts: special Razzo Rosso profiles for CIS fuel injection
Induction: Bosch CIS fuel injection
Exhaust: standard Ferrari headers, port matched, X-Ost Maranello sport muffler
(no cats).
Ignition: Ferrari electronic ignition

Suspension and Brakes:

Suspension: Adjustable coilovers
Brakes: 310-mm Girodisc two-piece front rotors, Wilwood calipers. Stock size rear rotor and Wilwood calipers.

Wheels and Tires:

Wheels: 17x8-inch front and 17x9-inch rear Compomotive 288 GTO-style 3-piece alloys.
Tires: 235-17 front and 275-17 rear Bridgestone Potenza tires

Click here to read Classic Motorsports article on this upgraded Ferrari 308.

Ferrari 308 GT4

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Model: 1974 Ferrari 308GT4

Engine Specs:

240.91 lb-ft of torque @5300-rpm, 279.73-hp @6600-rpm

Click here to see details and dyno sheet on this motor.

Type: 3.0-liter V-8, DOHC 2V/cylinder
Bore: 81mm
Stroke: 71mm
Compression ratio: 8.8:1
Cylinder heads: stock
Camshafts: standard factory Euro grind, 233°/225°
Induction: 40mm Weber DCN on standard manifolds with factory air box and filter
Exhaust: stock Ferrari headers, port matched with Tubi muffler
Ignition: points/coil

Suspension and Brakes:

Suspension: Heavier weight springs, revalved Koni shocks, lowered ride height. Larger rear swaybar to reduce understeer.
Brakes: Stock rebuilt

Wheels and Tires:

Wheels: 16-inch

More info on this project:

The 1974 Ferrari Dino 308 GT/4 shown in these pictures was a Carobu Engineering project car. This was a rare European-spec Dino GT4 that was used as an emissions test car for a college in Texas. The car was later purchased by a doctor, rarely driven and placed in storage for several years with only 11,000 km on the clock. Carobu appreciated the value of this "diamond in the rough" and purchased the car in order to restore it and to display the company's capabilities.

The initial phase of the project entailed restoring the body and interior as well as refreshing the engine to original Ferrari specifications. After quantification of the cars performance, Carobu modified the car in order to enhance it's performance. Some of these modifications included the installation of a Tubi-Style exhaust, Brembo brake upgrades, suspension modifications and engine upgrades.