S2
- Engine block: OEM - Standard (optional)
- Main bearings: OEM - Standard
- Conrod bearing: OEM - Standard
- Water pump: OEM - Standard
- Crank pulley & bolts: OEM - Standard
- Turbochargers: OEM - Standard
- Turbo outlet: OEM - Standard
- Engine gasket: OEM - Standard (overhauled)
The second step consists in upgrading the following part list to a higher spec:
- Pistons: N1 Version
- Piston rings: N1 Version
- Oil pump: N1 Version
- Timing belt: Nismo reinforced
- Oil pan baffle plate: Nismo
- Air filter: Nismo
- Spark plugs: Nismo racing type #7
- Heat-shield tape: Nismo 50mm
The end result of the workflow so far is the older S1 engine concept. The S2 represents the natural evolution of its predecessor and Nismo focused on modernizing certain areas by adding the following parts:
- Fuel injectors: R35 GT-R - Nissan OEM 570cc
- Fuel delivery pipe: Nismo R35 conversion
- Camshaft: Nismo S2
- Head gasket: Nismo 0.9mm
- ECM: Nismo S2
- Engine cover: Nismo S2 exclusive
A point worth noticing is that, in case the engine is developed for a BNR32 or BCNR33, the turbos would be upgraded to BNR34 OEM Standard with ceramic internals, aiming to improve torque response from low/mid speed ranges.
R2
The list of differences between S2 and R2 is noticeable and quite long. Let's start with the R1 Concept base:
- Engine block: N1 Version
- Pistons: N1 Version
- Piston rings: N1 Version
- Exhaust manifold: N1 Version
- Main bearings: Nismo
- Conrod bearing: Nismo
- Head gasket: Nismo 0.9mm
- Engine gasket kit: OEM - Standard
- Spark plugs: Nismo racing type #8
- Turbochargers: Nismo R1 turbo kit
- Turbo outlet: Nismo large capacity type
- Heath-shield tape: Nismo 50mm
- Air flow meter: Nismo large capacity type
- Oil pump: Nismo reinforced
- Oil pan baffle plate: Nismo
- Air filter: Nismo
- Timing belt: Nismo reinforced
- Exhaust manifold spacer: Nismo
As you can see almost everything is replaced with brand new Nismo parts. Amongst the most noticeable difference is worth noticing the presence of the N1 engine block, the same model originally mounted on the BNR34 Nür spec.
The second component that stands out is the R1 turbo kit.
The final step to finish the conversion to R2 is the same as the one for S2, but just with a different, dedicated camshaft and ECM unit.
- Fuel injectors: R35 GT-R - Nissan OEM 570cc
- Fuel delivery pipe: Nismo R35 conversion
- Camshaft: Nismo R2
- ECM: Nismo R2
- Engine cover: Nismo R2 exclusive
Completely hand-built, Nismo takes pride in assembling the R2 units with a very high degree of precision, aiming to optimal internal crank and pulley balance to deliver aggressive acceleration and peak torque response at lower revs.
Back in the days Nismo raced a Z-tune prototype at Nismo Festival in a Tuners Battle against all the major names (including MCR and Top Secret) and scored a win in 2000 and a third place in 2001, demonstrating that they can be well at the top both on the road and track.
Until next time.
(Photos Copyright: Nismo)