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HKS Short block VR38 4.3L STEP Pro Nissan 23011-AN015
Short block incorporating VR38 4.3L displacement up kit. Assuming circuit driving, the crankshaft and main bearing cap are further strengthened.
・Assumed stage: For circuit driving ・Assumed torque: ~1500N･m
The assumed torque is a value assumed from our in-house test data, etc., and does not guarantee that it can be used without damage.
Please note that the allowable torque value will change depending on the vehicle specifications, road surface conditions, driving conditions, mileage, etc. when using the actual vehicle.
The Pro exclusive crank has changed the material to nitriding steel and changed the surface treatment to ion nitriding, deepening the surface hardness and hardening layer to greatly improve durability.
Increased torsional strength by enlarging the corner radius of the crankpin
10mm longer front end of crank to prevent fretting on pulley
Uses HKS original design main stud bolt with increased screw size.
#2 and 3 journals are made of chrome molybdenum to increase strength
Line boring to ensure journal roundness
Main bearings and connecting rod bearings are selected through numerous tests
VR43 engine dedicated crank damper reduces torsional vibration. (accessories)
Crank damper for VR43 (co-developed with ATI)
Dedicated crank expands the corner radius of the pin to improve the torsional strength of the crank.
Dedicated connecting rod bearing
Fully machined crankshaft that achieves vibration reduction, light weight, and high response by adopting high-efficiency balance weights
The #2 and #3 bearing caps are remade with chrome molybdenum and strengthened, and the accuracy is improved by line boring.
Specifications
| HKS 4.3L | genuine | |
|---|---|---|
| boa | 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 | 4,255cc | 3,799cc |
SHORT BLOCK VR38 4.3L STEP Pro
| Block processing details | #2/3 chrome molybdenum cap |
|---|---|
| Relief processing of crank interference part | |
| Main bearing screw size up | |
| Ladder cap hole enlargement, counterbore | |
| Line boring of journal holes | |
| Honing | |
| main bolt | HKS M12 Stud Bolt (625+) |
| piston | HKS machined (molybdenum coat) |
| connecting rod | HKS H cross section (fillet part relief processing) |
| Crankshaft | Machined nitrided steel (tungsten weight) |
| Ion nitriding | |
| Enlarged pin fillet R | |
| Crank damper attachment extension | |
| main bearing | ACLs |
| connecting rod bearing | Genuine + WPC |
| crank pulley | VR43 exclusive damper |
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