Engine Specs - S65/S85 Rod Bolts - Revision history

Rcollins: /* SPEC: OEM: Measurements (Virgin Rods) */

2024-02-01T17:46:33Z

SPEC: OEM: Measurements (Virgin Rods)

← Older revision		Revision as of 17:46, 1 February 2024
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	====SPEC: OEM: Measurements (Virgin Rods)====		====SPEC: OEM: Measurements (Virgin Rods)====
	* Virgin rods are honed at approximately 2/3 torque. When the rod bolts are tightened to full torque, the virgin rods distort the bore by making the measurements at 90-degrees a few tenths tighter than perfectly round. For factory bearings, this might be a problem. For aftermarket extra-clearance bearings from BE Bearings, this is not a problem.		* Virgin rods are honed at approximately 2/3 torque. When the rod bolts are tightened to full torque, the virgin rods distort the bore by making the measurements at 90-degrees a few tenths tighter than perfectly round. For factory bearings with tight clearances, this bore distortion might be a problem if it were to adversely effect and clamp tighter at 90-degrees. For aftermarket extra-clearance bearings from BE Bearings, this would not a problem.
	<p></p>		<p></p>
	{\| class = "diyTable supportData rodBearings"		{\| class = "diyTable supportData rodBearings"

Rcollins: /* SPEC: Carrillo-WMC: Bore Distortion (Virgin Rods, 45 Ft/Lbs) */

2016-12-10T22:39:33Z

SPEC: Carrillo-WMC: Bore Distortion (Virgin Rods, 45 Ft/Lbs)

Show changes

Rcollins: /* SPEC: Carrillo-WMC: Bore Distortion (Virgin Rods, 45 Ft/Lbs) */

2016-12-10T22:37:44Z

SPEC: Carrillo-WMC: Bore Distortion (Virgin Rods, 45 Ft/Lbs)

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    |R1

Rcollins: /* SPEC: Carrillo-WMC: Measurements (Virgin Rods, 45 Ft/Lbs) */

2016-12-10T22:35:25Z

SPEC: Carrillo-WMC: Measurements (Virgin Rods, 45 Ft/Lbs)

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 ==== SPEC: Carrillo-WMC: Measurements (Virgin Rods, 45 Ft/Lbs) ====
 {| class = "diyTable supportData rodBearings"
    !Angle

Rcollins: /* SPEC: Carrillo-WMC: Measurements (Virgin Rods, 45 Ft/Lbs) */

2016-12-10T22:34:53Z

SPEC: Carrillo-WMC: Measurements (Virgin Rods, 45 Ft/Lbs)

← Older revision		Revision as of 22:34, 10 December 2016
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	{\| class = "diyTable supportData rodBearings"		{\| class = "diyTable supportData rodBearings"
	\|Angle		!Angle
	~~\|R1~~		!Rod-1
	~~\|R2~~		!Rod-2
	~~\|R3~~		!Rod-3
	~~\|R4~~		!Rod-4
	~~\|R5~~		!Rod-5
	~~\|R6~~		!Rod-6
	~~\|R7~~		!Rod-7
	~~\|R8~~		!Rod-8

	\|-		\|-

Rcollins: /* SPEC: Carrillo-WMC: Measurements (Virgin Rods, 45 Ft/Lbs) */

2016-12-10T22:34:14Z

SPEC: Carrillo-WMC: Measurements (Virgin Rods, 45 Ft/Lbs)

← Older revision		Revision as of 22:34, 10 December 2016
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	\|}		\|}
	<p></p>		<p></p>
	{\|
			{\| class = "diyTable supportData rodBearings"
	\|Angle		\|Angle
	\|R1		\|R1

Rcollins: /* SPEC: Carrillo-WMC: Measurements (Virgin Rods, 45 Ft/Lbs) */

2016-12-10T22:33:35Z

SPEC: Carrillo-WMC: Measurements (Virgin Rods, 45 Ft/Lbs)

Show changes

Rcollins: /* SPEC: Carrillo-WMC: Torque Procedure */

2016-12-01T05:54:11Z

SPEC: Carrillo-WMC: Torque Procedure

← Older revision		Revision as of 05:54, 1 December 2016
Line 1,617:		Line 1,617:

	==== SPEC: Carrillo-WMC: Torque Procedure ====		==== SPEC: Carrillo-WMC: Torque Procedure ====
	* ~~TBD~~		* 45 Ft/Lbs
	* Unlike the factory rod bolts, these may be reused.		* Unlike the factory rod bolts, these may be reused.

Rcollins: /* Rod bore distortion */

2016-12-01T04:43:16Z

Rod bore distortion

← Older revision		Revision as of 04:43, 1 December 2016
Line 14:		Line 14:
	You may ask whether or not this matters. Yes, of course it matters. The rod bearing itself is not perfectly round. The rod bearing is designed to be thinner on the sides and thicker in the center. This design maximizes the oil wedge strength at 90-degrees to the parting lines (Top-Dead-Center) when the bearing needs it most. To ensure the bearing works correctly to maximize film strength, the rod bore big it must be as perfectly round as possible. When the bore is not round, we call this bore distortion. Bore distortion in either direction can cause bearing failure. Both the Mahle and King bearing failure guides show examples of bearing failure caused by this type of bore distortion. The following two guides explain bearing eccentricity, bore distortion, and bearing failures in far greater detail than I ever could.		You may ask whether or not this matters. Yes, of course it matters. The rod bearing itself is not perfectly round. The rod bearing is designed to be thinner on the sides and thicker in the center. This design maximizes the oil wedge strength at 90-degrees to the parting lines (Top-Dead-Center) when the bearing needs it most. To ensure the bearing works correctly to maximize film strength, the rod bore big it must be as perfectly round as possible. When the bore is not round, we call this bore distortion. Bore distortion in either direction can cause bearing failure. Both the Mahle and King bearing failure guides show examples of bearing failure caused by this type of bore distortion. The following two guides explain bearing eccentricity, bore distortion, and bearing failures in far greater detail than I ever could.

	PDF Guide: [http://kingbearings.com/wp-content/uploads/2014/10/Optimal-eccentricity-value-of-high-performance-bearings.pdf ~~King Bearings:~~ Optimal Eccentricity for High		PDF Guide: [http://kingbearings.com/wp-content/uploads/2014/10/Optimal-eccentricity-value-of-high-performance-bearings.pdf Optimal Eccentricity for High Performance Bearings]
	Performance Bearings]

	PDF Guide: ~~Mahle~~[http://www.speedperf6rmanc3.com/content/Engine%20Bearings.pdf Bearing ~~Failures~~]		PDF Guide: [http://www.speedperf6rmanc3.com/content/Engine%20Bearings.pdf Mahle Bearing Failure Guide]

	In theory, whenever the rod bolts are changed, the rod big-end should be re-honed to reestablish the perfect circle of the bore. Re-honing the connecting rod is essential because the clamping force of the new rod bolts will be different. But in reality when people change their rod bearings and install new rod bolts, they can't re-hone the connecting rods because it would require complete engine disassembly. So selecting to correct rod bolt with the correct torque is essential to matching as closely as possible the original factory clamping force. It's not going to be perfect, but it will be good enough.		In theory, whenever the rod bolts are changed, the rod big-end should be re-honed to reestablish the perfect circle of the bore. Re-honing the connecting rod is essential because the clamping force of the new rod bolts will be different. But in reality when people change their rod bearings and install new rod bolts, they can't re-hone the connecting rods because it would require complete engine disassembly. So selecting to correct rod bolt with the correct torque is essential to matching as closely as possible the original factory clamping force. It's not going to be perfect, but it will be good enough.
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	-----		-----

	== Rod Bolt Comparisons ==		== Rod Bolt Comparisons ==
	=== OEM Rod Bolts ===		=== OEM Rod Bolts ===

Rcollins: /* Rod bore distortion */

2016-12-01T04:41:41Z

Rod bore distortion

← Older revision		Revision as of 04:41, 1 December 2016
Line 11:		Line 11:
	=== Rod bore distortion ===		=== Rod bore distortion ===
	The rod bolts play a critical role in keeping the rod big-end bore perfectly round. A properly torqued rod bolt and properly honed rod big-end bore will create a perfectly round circle in the big-end bore. The clamping force is what creates this perfect circle. With improper clamping force, the rod big-end bore will distort, and become out of round.		The rod bolts play a critical role in keeping the rod big-end bore perfectly round. A properly torqued rod bolt and properly honed rod big-end bore will create a perfectly round circle in the big-end bore. The clamping force is what creates this perfect circle. With improper clamping force, the rod big-end bore will distort, and become out of round.

			You may ask whether or not this matters. Yes, of course it matters. The rod bearing itself is not perfectly round. The rod bearing is designed to be thinner on the sides and thicker in the center. This design maximizes the oil wedge strength at 90-degrees to the parting lines (Top-Dead-Center) when the bearing needs it most. To ensure the bearing works correctly to maximize film strength, the rod bore big it must be as perfectly round as possible. When the bore is not round, we call this bore distortion. Bore distortion in either direction can cause bearing failure. Both the Mahle and King bearing failure guides show examples of bearing failure caused by this type of bore distortion. The following two guides explain bearing eccentricity, bore distortion, and bearing failures in far greater detail than I ever could.

			PDF Guide: [http://kingbearings.com/wp-content/uploads/2014/10/Optimal-eccentricity-value-of-high-performance-bearings.pdf King Bearings: Optimal Eccentricity for High
			Performance Bearings]

			PDF Guide: Mahle[http://www.speedperf6rmanc3.com/content/Engine%20Bearings.pdf Bearing Failures]

	In theory, whenever the rod bolts are changed, the rod big-end should be re-honed to reestablish the perfect circle of the bore. Re-honing the connecting rod is essential because the clamping force of the new rod bolts will be different. But in reality when people change their rod bearings and install new rod bolts, they can't re-hone the connecting rods because it would require complete engine disassembly. So selecting to correct rod bolt with the correct torque is essential to matching as closely as possible the original factory clamping force. It's not going to be perfect, but it will be good enough.		In theory, whenever the rod bolts are changed, the rod big-end should be re-honed to reestablish the perfect circle of the bore. Re-honing the connecting rod is essential because the clamping force of the new rod bolts will be different. But in reality when people change their rod bearings and install new rod bolts, they can't re-hone the connecting rods because it would require complete engine disassembly. So selecting to correct rod bolt with the correct torque is essential to matching as closely as possible the original factory clamping force. It's not going to be perfect, but it will be good enough.