


|
Product detailed specification |
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Bore size |
84.50mm |
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Stroke |
89.60mm |
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JE Pistons compression ratio (CR) |
9.5:1 |
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OEM compression ratio (CR) |
10.2:1 |
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Dome volume (CC) |
-22cm3 |
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Compression height (CH) |
31.60mm |
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Pin diameter |
22mm |
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Features |
Accepts Turbo and Nitrous; Ultra series |
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Fits for |
BMW - 3.0 24V Turbo (N54B30) |



Spring data:
Outer spring outer diameter: 25.00mm
Outer spring inner diameter: 18.00mm
Inner spring outer diameter: 18.00mm
Inner spring inner diameter: 13.00mm
Seat pressure: 73Lbs@35.40mm (seat), 202Lbs@10.5mm (open/lift)
Spring coil bind: 21.00mm/17.00mm
Max lift: 14.40mm
Rate: 12.60Lbs/mm
Set includes:



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Part number starting with 330 |
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Athena advantages |
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Reinforced material |
Asbestos free composite raw material OE approved |
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Stainless steel ring (AISI304) |
Separate stainless steel rings assure maximum sealing around cylinder bore also on NOS and/or turbo charged engine where boost is over 2 bars. No head and block machining required |
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Silicon beading |
Silicon-based beading is applied on critical areas to improve sealing around all cooling water and oil passages |






| ENGINE BEARINGS | ||
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MAIN BEARING SET |
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| Part# | ||
| 5M1644H |
5M1644HX |
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| Sizes | STD, .25, .50 | STD |
| Oil Clearance | Standard | + 0.001" Extra |
| Half Type | Upper & Lower | |
| Material | Tri-metal | |
| Min Std Shaft Size | 2.1243in / 53.958mm | |
| Max Std Shaft Size | 2.1251in / 53.978mm | |
| Min Std Tunnel Size | 2.3228in / 59.000mm | |
| Max Std Tunnel Size | 2.3236in / 59.019mm | |
| Max Wall at Crown | 0.0985in / 2.502mm | 0.0980in / 2.489mm |
| Max Overall Length | 0.728in / 18.49mm | |
| Notes | Set contain 6 x 1648H and 4 x 1644H shells. Use 1648H shell in #4 position as upper and lower. | |
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Diagram |
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| ENGINE BEARINGS | ||
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MAIN BEARING SET |
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| Part# | ||
| 5M7807H |
5M7807HX |
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| Sizes | STD, .25, .50 | STD |
| Oil Clearance | Standard | + 0.001" Extra |
| Half Type | Identical Halves | |
| Material | Tri-Metal | |
| Min Std Shaft Size |
2.1569 in / 54.785 mm |
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| Max Std Shaft Size | 2.1573 in / 54.795 mm | |
| Min Std Tunnel Size | 2.3122 in / 58.731 mm | |
| Max Std Tunnel Size | 2.3128 in / 58.744 mm | |
| Max Wall at Crown | 0.0765 in / 1.945 mm |
0.0760 in / 1.933 mm |
| Max Overall Length | 0.728 in / 18.50 mm | |
| Notes | ||
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Diagram |
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| ENGINE BEARINGS | ||
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CON ROD BEARING SET |
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| Part# | ||
| 6B8100H |
6B8100HX |
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| Sizes | STD, .025, .25 | STD |
| Oil Clearance | Standard | + 0.001" Extra |
| Half Type | Identical halves | |
| Material |
Tri-metal Hardened steel backs |
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| Min Std Shaft Size |
2.0465in / 51.981mm |
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| Max Std Shaft Size |
2.0472in / 52mm |
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| Min Std Tunnel Size |
2.1663in / 55.024mm |
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| Max Std Tunnel Size |
2.167in / 55.042mm |
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| Max Wall at Crown |
0.0593in / 1.506mm |
0.0588in / 1.493mm |
| Max Overall Length |
0.7598in / 19.3mm |
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| Notes | ||
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Diagram |
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