ENGINE BLOCK COMPONENTS
【Short block VR38 4.3L STEP3】
Short block that includes the VR38 4.3L Capacity Upgrade kit
・Expected use scenes: Street
・Assumed torque: ~ 1000 N∙m
The assumed torque came from the in-house test data. We do not guarantee the use of the product without any damage.
Please note that the allowable torque may vary depending on the specifications of a vehicle, road surface conditions, driving conditions, travel distances, and so on when using the product on the actual vehicle.
- Employing the HKS original main stud bolt with upsized thread.
- The process for upsizing the thread of the block.
- Line boring processing was performed to ensure the roundness of the bearing journal while maintaining the increased axial force.
- The most appropriate main bearing and connecting rod bearing are used after many tests.
- Reduce torsion vibrations by using the provided crank damper developed only for VR43 engines. (Accessory part)
It improves the driving comfort on the street by significantly increasing the low-speed torque by assuming the street use.
For users who often drive on the circuit or high-power drive, HKS recommends the following product.
COMPLETE ENGINE VR38 4.3L STEP Pro → Detail
COMPLETE ENGINE VR38 4.3L STEP Pro+ → Detail
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HKS crank damper only for VR4.3L
(Cooperatively developed with ATI PERFORMANCE PRODUCTS) -
Billet piston using A2618 material with high high-temperature strength.
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Connecting rod bearing superior to the load capacity to improve the durability at high torque.
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The billet crankshaft reduces torsional vibrations, weight-saving, and high-response performance using the high-efficient counterweight.
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Increasing the axial force by using the main stud bolt with an increased size thread.
It also ensures the roundness of the bearing journal by line boring.
Specifications
HKS 4.3L | Stock | |
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Bore | 95.5 mm | 95.5 mm |
Stroke | 99.0 mm | 88.4 mm |
Compression Ratio (t=0.8) | 8.6 | 9.0 |
Allowable Rotation Speed | 7,400 rpm | 7,000 rpm |
Displacement | 4,255 cc | 3,799 cc |
SHORT BLOCK VR38 4.3L STEP3
Block Modifications | Provided the clearance for the crank |
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Increased the main bearing screw size | |
Enlarged bore and counter boring in the ladder beam bearing cap | |
Main bearing journal line boring | |
Honing | |
Main Bolt | HKS M12 stud bolt (625+) |
Piston | HKS billet, Molybdenum coating |
Connecting Rod | HKS H-beam |
Crankshaft | HKS billet |
Fillet weld WPC treatment | |
Main Bearing | ACL product |
Connecting Rod Bearing | Stock, WPC treatment |
Crank Pulley | HKS product for VR43 |