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ENGINE BLOCK COMPONENTS
【CAPACITY UPGRADE KIT RB26 2.8L HIGH RESPONSE H-COMP Φ86.5】
The “RB28 HIGH RESPONSE KIT”, which delivers the ultimate in response, now includes a high-compression version that uses “D86.5mm bore pistons”. Along with improved response in the low rpm range thanks to higher compression, this product is designed to be used without the boring process, allowing the valuable cylinder block to be used for a longer period of time.
Specification
| 2.8L D86.5 | 2.8L D87 | Nissan Genuine | |
|---|---|---|---|
| Bore | 86.5mm | 87.0mm | 86.0mm |
| Stroke | 77.7mm | 77.7mm | 73.7mm |
| Comp. ratio (t=1.2) | 9.0 | 8.7 | - |
| Allowable RPM | 9,000rpm | 9,000rpm | 7,600rpm |
| Displacement | 2,740cc | 2,771cc | 2,568cc |
Features
The “RB28 HIGH RESPONSE KIT”, which delivers the ultimate in response, now includes a high-compression version that uses “D86.5mm bore pistons”. Along with improved response in the low rpm range thanks to higher compression, this product is designed to be used during overhaul with the minimum boring process, allowing the valuable cylinder block to be used for a longer period of time.
(1) Piston Weight: 320g
- The D86.5mm bore size allows the block to be used with minimum boring process until the next overhaul, and a separately available D87mm kit can be used when overhaul is required.
- The increased compression ratio improves throttle response in the low RPM range.
- The use of high-temperature-strength A2618 alloy allows to design thinner wall construction.
- Machining from billet eliminates unnecessary weight.
- The BCD (Bridge Concept Design) structure enhances structural rigidity.
- A dual-layer molybdenum coating improves initial wear-in characteristics and reduces friction.
- Shortened D22mm piston pin is used to achieve both increased bending stiffness and reduced weight.
Highly rigid, lightweight piston machined from high-temperature strength A2618 alloy
(2) Crankshaft Stroke: 77.7mm
- A fully counterweighted, billet-machined crankshaft has been adopted. The counterweights are optimally positioned to achieve both low rotational inertia and a high weight balance.
- By intentionally limiting the maximum output to 700 horsepower, we were able to minimize weight to the extreme and enhance engine response.
Exclusive cranks with extremely reduced counterweights
(3) Connecting rod
- Billet H-beam connecting rods made from nickel-chromium steel
- Designed to accommodate D22mm piston pins.
- To improve fatigue strength, the surface has been treated with WPC (Wide Peening and Cleaning) processing.
Special lightweight pin enlarged to D22mm to handle high combustion pressure