Horsepower Is Irrelevant (To Your Rod Bolts)

When can you reuse a rod bolt, and does horsepower (or more usefully cylinder pressure) matter when it comes to selecting the correct rod bolt material?

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Chris Raschke of ARP runs us through the ins and outs of these questions and more including some insight into the materials ARP commonly use for rod bolts, being 8740 ally chrome moly (aka chromoly) steel, ARP2000, L19, Custom Age 625+, MP-35 etc

When is it OK to reuse an ARP rod bolt, what is hydrogen embrittlement/stress corrosion and why is it important to use a known lubricant on your rod bolts rather than just some random oil off the shelf are all topics Chris helps us to understand via the @arpfasteners stand at the @semashow

While gloves are worn by many engine builders by choice, they are not strictly required save for some specific materials which is also discussed in relation to the likes of custom age 625+ and L19 etc.

NOTE: At 13-50 Andre states the 'plastic area' instead of 'elastic area'. If it was the plastic area/region, it would not return to shape and the bolts would not be reusable as Chris and Andre are discussing. Sorry for that slip of the tongue.

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TIME STAMPS:
0:00 - Overlook These At Your Peril
0:20 - Connecting Rod Bolts
1:30 - Material Load Calculations & Choice
2:11 - Horsepower Is Irrelevant To Bolts
3:08 - Price & Rod Design
4:18 - What Is Hydrogen Embrittlement/Stress Corrosion
5:53 - Gloves Are A Safe Bet Here
6:32 - Head Stud Application
6:58 - How A Fastener Actually Works | Torque Vs Stretch etc
10:02 - Lubricant & Friction Coefficient
11:38 - Bearing Journal Distortion & Rod Bolt Upgrade Considerations
12:30 - Small Block Vs Big Block Chev Example
12:57 - Rod Bolt Life Expectancy/Replacement
14:30 - Thumbs Up, Sub, Free Lesson
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TAGS:
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