what are the stock rods made of?
07-12-2002, 05:16 PM
#3
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Re: what are the stock rods made of? this is what i got out of an article called the Millenium Motor:
"The LS1 uses a sintered, forged, PF1159M steel connecting rod. Also called "powdered metal" or "PM," this technology was introduced in Corvettes for MY96. The basic, Small-Block rod currently in the GM Performance Parts catalog is also PM.
To make a sintered rod, a mold is filled with steel powder which is "briquetted" or compressed under extremely high pressure. Then, the rod is "sintered" which heats the metal just to its softening point causing the steel molecules bond and making a dense, very strong part. Next, the rod is put through a conventional forging process. Lastly, it is shotpeened. The combination of these manufacturing techniques results in a rod with "net shape," which requires no machining for profile or balance and is more consistent in mass than rods of traditional manufacture.
The LS1 rod is also known as a "cracked rod" because the big-end is fracture split. During the finishing process, to split the big-end; a stress riser is cut into its inside diameter. The rod is stressed such that it fractures at that riser. The jagged surface left on both pieces precisely locates and locks the rod cap in place once the rod is assembled. For simple assembly and mass reduction, the LS1 rods use a 9 mm. capscrew rather than a rod bolt and nut to hold the big-end together."
"The LS1 uses a sintered, forged, PF1159M steel connecting rod. Also called "powdered metal" or "PM," this technology was introduced in Corvettes for MY96. The basic, Small-Block rod currently in the GM Performance Parts catalog is also PM.
To make a sintered rod, a mold is filled with steel powder which is "briquetted" or compressed under extremely high pressure. Then, the rod is "sintered" which heats the metal just to its softening point causing the steel molecules bond and making a dense, very strong part. Next, the rod is put through a conventional forging process. Lastly, it is shotpeened. The combination of these manufacturing techniques results in a rod with "net shape," which requires no machining for profile or balance and is more consistent in mass than rods of traditional manufacture.
The LS1 rod is also known as a "cracked rod" because the big-end is fracture split. During the finishing process, to split the big-end; a stress riser is cut into its inside diameter. The rod is stressed such that it fractures at that riser. The jagged surface left on both pieces precisely locates and locks the rod cap in place once the rod is assembled. For simple assembly and mass reduction, the LS1 rods use a 9 mm. capscrew rather than a rod bolt and nut to hold the big-end together."
07-13-2002, 01:22 AM
#4
Re: what are the stock rods made of? thanks thats some good info
now do you think the'll take a beating <img border="0" alt="[fight]" title="" src="graemlins/gr_punch.gif" />
<small>[ July 13, 2002, 01:23 AM: Message edited by: smokinHawk ]</small>
now do you think the'll take a beating <img border="0" alt="[fight]" title="" src="graemlins/gr_punch.gif" />
<small>[ July 13, 2002, 01:23 AM: Message edited by: smokinHawk ]</small>
07-13-2002, 11:16 PM
#5
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Re: what are the stock rods made of? Excellent info Jackyl-30. PM rods are probably equivalent or slightly stronger than the old "pink" rods. Great technology, ain't it?
Will they take 500-600 rwhp? Not on a bet in a car I'd own! 450-500 possibly.
If you plan to have your engine live at 600 fwhp, spring for a good set of H-beam 4340 rods to go with the forged crank and pistons. It's cheaper in the long run than building extra short blocks when you run over your crankshaft.
Will they take 500-600 rwhp? Not on a bet in a car I'd own! 450-500 possibly.
If you plan to have your engine live at 600 fwhp, spring for a good set of H-beam 4340 rods to go with the forged crank and pistons. It's cheaper in the long run than building extra short blocks when you run over your crankshaft.
07-14-2002, 12:54 AM
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Re: what are the stock rods made of? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by smokinHawk:
<strong>thanks thats some good info
now do you think the'll take a beating <img border="0" alt="[fight]" title="" src="graemlins/gr_punch.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">If your taking the motor apart then get new rods.Better safe than sorry you know.
<strong>thanks thats some good info
now do you think the'll take a beating <img border="0" alt="[fight]" title="" src="graemlins/gr_punch.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">If your taking the motor apart then get new rods.Better safe than sorry you know.
