This project was carried out for a Le Mans 24h LMP2 racing programme. Our client, linked to Toyota, requested the development of a LMP2 engine based on the Toyota 2ZZGE. This was quite of a challenge as regulations allowed for 2.0L displacement turbocharged engines and the 2ZZGE is a N/A 1,8L.
Therefore, we started by incresing displacement to the maximum in he rulesbook, with a completely bespoke cranktrain and pistons. Cylinder bores were reinforced with strong racing sleeves in order to cope with higher in-cylinder forced induction pressures.
Thermodynamics were heavily altered in the cylinder head with the addition of a GTX3071 Garret turbocharger. Ports were CNC machined, new guides and valves fitted and valvetrain completely redesigned using F1 finger-type rocker arms and bespoke camshafts.
The lubrication system was upgraded to dry sump with a 4 stage pump using an integrated deaerator. The new flat sump lowers the crankshaft axis and center of gravity of the engine which is very important for the dynamics of the vehicle.
In its final spec, using the imposed 40mm restrictor, pump gas and 1,67bar boost, the new engine was dynoed at 465HP @ 6900rpm and 560Nm @ 5000rpm. Quite an achievement from the claimed 190HP in the 2ZZ engine indeed.