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ENGINE BLOCK COMPONENTS
【Capacity Upgrade Kit VR38DETT 4.3L STEP Pro BCD】
The strengthened crankshaft can withstand even higher torque based on the VR38 4.3L STEP3 KIT
Features
- The crank for STEP Pro changed the material to nitride steel and treated the surface with ion nitriding to improve durability by enhancing the surface hardness and hardened layer.
- Expand the R-corner of the fillet weld in the crankpin to improve the torsion strength.
- Prevents fretting by extending the crank nose 10 mm longer.
- The counterweight employs an asymmetric shape to be compatible with the torsion strength and the response.
- The tungsten is used on the counterweight to achieve the balance rate improvement and response.
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Pulley mounting part that extended 10 mm and highly efficient counterweight using the tungsten.
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Expand the R-corner of the fillet weld in the crankpin to improve the torsional rigidity of the crankshaft
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The connecting rod with a clearance shape to avoid contact with the enlarged R-corner of the fillet weld in the crankpin.
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An asymmetrical crank having an increased thickness counterweight #8 for increased torsional strength.
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Reduced weight for counterweights #2 and #5 to improve response.
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The billet piston uses A2618 material with high-temperature strength.
Specifications
| HKS 4.3L KIT | Stock | |
|---|---|---|
| Bore | 95.5mm | 95.5mm |
| Stroke | 99.0mm | 88.4mm |
| Compression Ratio (t=0.8) |
8.6 | 9.0 |
| Allowable Rotation Speed |
7,400rpm | 7,000rpm |
| Displacement | 4,255ml | 3,799ml |
【CONROD BEARING ADJUSTMENT VR43 STEP Pro】
Introducing a clearance adjustment and chamfering service for the connecting rod bearings of the VR38 4.3L STEP Pro.
Features
- The crankshaft for the VR43 STEP Pro has an enlarged corner radius at the crank pin to increase torsional strength. This requires chamfering of the connecting rod bearings.
- When you purchase a new STEP Pro FULL KIT, we will provide a service to adjust the clearance of the sub-metal and chamfer the bearings for an additional fee.
- The connecting rod bearings are genuine Nissan parts that are also used in our COMPLETE ENGINE and have been WPC treated.
- Once the adjustment is complete, the product will be temporarily assembled with a connecting rod and delivered. The connecting rods will be stamped with numbers 1 to 6 to identify the cylinders.
- Please note that the bearing surface will be slightly scratched by the cylinder gauge probe, but this will not affect the function.
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The corner R of the pin part has been enlarged.
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The big end of the connecting rod is chamfered.
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Pre-installed connecting rod bearings