
8740 Chrome Moly: Until the development of today’s modern alloys, chrome moly was popularly considered a high strength material. Now viewed as only moderate strength, 8740 chrome moly is seen as a good tough steel, with adequate fatigue properties for most racing applications, but only if the threads are rolled after heat-treatment, as is the standard ARP production practice. Typically, chrome moly is classified as a quench and temper steel, that can be heat-treated to deliver tensile strengths between 180,000 and 210,000 psi

Athena Racing 330 serijos Cooper Ring cilindrų galvos tarpinė.
Šios tarpinės yra su nerūdijančio plieno INOX žiedais, šis technologinis sprendimas gerokai lenkia Fire Ring tarpinių technologiją.
Cooper Ring tarpinės yra taip pat tinkamos pirmam, antram variklio remontui.
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Tarpinės kodo pradžia 330 |
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Athena privalumai |
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Sustiprinta medžiaga |
OE patvirtinta - tarpinėms gaminti nenaudojamas asbestas |
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Nerūdijančio plieno žiedai (AISI304) |
Atskiri nerūdijančio plieno žiedai užtikrina maksimalų sandarumą aplink cilindrų angas varikliams, dirbantiems ekstremaliomis sąlygomis, taip pat turintiems NOS sistemą ir/ar turbokompresorių, kai MLS tarpinė nebepajėgi užsandarinti degimo kameros. Cilindrų galvos ir variklio bloko nereikia specialiai apdirbti. |
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Silikoninis sandarinimas |
Silikoninis sandarinimas yra taikomas svarbiose vietose siekiant pagerinti sandarinimą aplink visas aušinimo ir tepimo angas. |

Cilindro diametras - 82.50mm
Storis - 1.22mm
Reinz prekės kodas - 61-31955-10
OE prekės kodai - 058 103 383 Q, 058 103 383 M, 06A 103 383 AK, 058 103 383 K, 058 103 383 H


| ENGINE BEARINGS | ||
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CON ROD BEARING SET |
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| Part# | ||
| 4B1606H |
4B1606HX |
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| Sizes | STD, .025, .25, .50 | 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 |
1.8802" /47.758mm |
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| Max Std Shaft Size |
1.8810" /47.778mm |
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| Min Std Tunnel Size |
1.9921" /50.600mm |
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| Max Std Tunnel Size |
1.9929" /50.619mm |
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| Max Wall at Crown |
0.0553" / 1.405mm |
0.0548" /1.392mm |
| Max Overall Length |
0.748" / 19.00mm |
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| Notes | Bearing has 1.65mm oil hole at crown | |
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Diagram |
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CT-1 is a Dry Film Lubricant coating that helps reduce friction and abrasive wear. It provides intermittent dry lubrication and is not affected by dust or dirt. CT-1 is specifically engineered to withstand the extreme conditions of today's high performance engines. Professional engine builders enjoy a higher level of confidence with increased embedability, strength and durability.

| ENGINE BEARINGS | ||
![]() |
CON ROD BEARING SET |
|
| Part# | ||
| 4B1606H |
4B1606HX |
|
| Sizes | STD, .025, .25, .50 | STD |
| Oil Clearance | Standard | + 0.001" Extra |
| Half Type | Identical Halves | |
| Material |
Tri-metal Hardened steel backs |
|
| Min Std Shaft Size |
1.8802" /47.758mm |
|
| Max Std Shaft Size |
1.8810" /47.778mm |
|
| Min Std Tunnel Size |
1.9921" /50.600mm |
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| Max Std Tunnel Size |
1.9929" /50.619mm |
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| Max Wall at Crown |
0.0553" / 1.405mm |
0.0548" /1.392mm |
| Max Overall Length |
0.748" / 19.00mm |
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| Notes | Bearing has 1.65mm oil hole at crown | |
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Diagram |
![]() |
|
CT-1 is a Dry Film Lubricant coating that helps reduce friction and abrasive wear. It provides intermittent dry lubrication and is not affected by dust or dirt. CT-1 is specifically engineered to withstand the extreme conditions of today's high performance engines. Professional engine builders enjoy a higher level of confidence with increased embedability, strength and durability.

| ENGINE BEARINGS | ||
![]() |
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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Spring data:
Seat pressure: intake - 60lbs @ 36.60mm, exhaust - 91lbs @ 33.20mm
Spring coil bind: intake - 23.00mm, exhaust - 18.50mm
Max lift: intake - 13.60mm, exhaust - 14.70mm
Rate: intake - 6.70lbs/mm, exhaust - 12.50lbs/mm
Intake single spring:
Outer diameter - 20.60mm
Inner diameter - 14.40mm
Exhaust double spring:
Outer spring outer diameter - 30.20mm
Outer spring inner diameter - 22.20mm
Inner spring outer diameter - 22.20mm
Inner spring inner diameter - 16.80mm
Set includes:
Intake springs - 12 pcs. SPR-A2095
Exhaust springs - 8 pcs. SPR-H1002DR-AU
Titanium retainers: 12 pcs. intake RET-AU5VI-T2, 8 pcs. exhaust RET-AU5VE-T1
Seats - 8 pcs. exhaust SEAT-H1000


The Super Alloy Engine valves represent the highest level of sophistication in valve technology. These valves are designed to handle the extreme heat requirements and punishment of today’s Nitro Fuels, Supercharged, Turbocharged, Nitrous Oxide, and Marine race motors.