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ENGINE BLOCK COMPONENTS

Capacity Upgrade Kit RB26 2.8L STEP3

Ultra high durable capacity upgrade kit for high performance tuning.

Specifications

  HKS 2.8L KIT Stock
Bore 87.0mm 86.0mm
Stroke 77.7mm 73.7mm
Comp. ratio (t=1.2) 8.7 -
Allowable RPM 9,000rpm 7,600rpm
Displacement 2,771cc 2,568cc

Features

High strength kit designed for high power

(1) Piston Kit   Piston weight:324g

  • Made from highly heat-resistant A2628 alloy
  • Machined for the ultimate lightweight
  • Truss Structure for improved strength
  • Double-layer MOLYBDEN coating reduce friction and improve initial fit-in
  • Shorter piston pins decrease weight of bore
  • φ22 piston pins increase flexural rigidity
  • Weight is same as previous φ21 piston pins

(2) Crankshaft   Stroke 77.7mm

  • Machined full counter crankshaft
  • Perfect balanced full counterweights for reducing impact on main journal bearings
  • For a strong durability in highest power output, surface strength is increased by "Ion Plasma Nitriding" steel

(3) Connecting Rods

  • H-beam machined by nickel chromium steel (SNCM)
  • Compatible with φ22 piston pin
  • Increase fatigue limit by WPC treatment

High-rigidity lightweight billet piston made from highly heat-resistant A2628 alloy

Ultimate crankshaft for best performance and durability

Lightweight pin enlarged to φ22 to cope with high combustion pressure

CAPACITY UPGRADE KIT RB26 2.8L LINEUP

  STEP ZERO STEP 1 STEP 2 【NEW】STEP 3 【NEW】HIGH RESPONSE
Concept & Target ●Capacity upgrade in engine O/H
●Mainly driving in street
●Improve response at an affordable price
●Improve torque & power by capacity and turbo upgrade
●Increase allowable RPM by high lift camshaft
●Increase more power by big turbo without losing response
●Increase allowable RPM by high lift camshaft
●Mainly for track race
●Next stage of STEP2 in high power and response
●Latest technology for ultimate performance
●Ultimate response with new designed ultra lightweight components
●Latest technology for ultimate performance
Recommend Turbo Stock・GTIII-SS GTIII-SS・GTIII-2530 GTIII-RS・GTIII-4R GTIII-5R GTIII-2530
Allowable RPM 8000rpm 8500rpm 9000rpm 9000rpm 9000rpm
Comp. ratio (t=1.2) 8.7 8.7 8.7 8.7 8.7
Max power (approx.) 550PS 600PS 800PS 900PS 700PS
Piston Forged φ86.5 or 87 - 21pin Forged φ86.5 or 87 - 21pin Forged φ87 - 21pin
・Nickel plating
・OBER coating
A2618 alloy billet φ87 - 22pin
・Truss Structure
・Double-layer MOLYBDEN coating
A2618 alloy billet φ87 - 22pin
・Truss Structure
・Double-layer MOLYBDEN coating
Piston Weight 401g 401g 401g 324g 324g
Piston Pin φ21 (105.2g) φ21 (105.2g) φ21 (105.2g) φ22 (97g) φ22 (97g)
Connecting Rod HKS Forged billet H-beam φ2
(SCM)
HKS Forged billet H-beam φ21
(SCM)
HKS Forged billet H-beam φ21
(SNCM)
HKS Forged billet H-beam φ22
(SNCM)
HKS Forged billet H-beam φ22
(SNCM)
Crankshaft Forged lightweight full counter
(20.1kg)
Forged full counter
(24.4kg)
Forged full counter
(22.9kg)
Billet full counter
(20.6kg)
Billet full counter
(19.3kg)
Moment of inertia Ratio
(to STEP ZERO)
100% 132% 119% 113% 102%
Allowable Torque 55 kgf・m 60 kgf・m 80 kgf・m 120 kgf・m 70 kgf・m

HKS offers a wide variation of products. Please choose the most suitable kit according to your purpose and budget.

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