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Old 06-21-2013, 08:58 AM
Hogg Hogg is offline
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Originally Posted by AutoGear View Post
Im not doubting the validity of your information, and not typically a grammar-nazi; but, are they steel or titanium?
No thats good that you corrected that, they are forged titanium connecting rods, not forged steel rods.

Thanks again, and I will go back and correct that, if the 30 minute timer hasnt run out yet.

Well it did run out.
1)The 2006-2013+ LS7 did get forged titanium rods, forged 4140 steel crank and cast hypereutectic aluminum pistons.

2)Caddi LSA got forged Powdered Metal rods, forged steel crankshaft and cast hypereutectic aluminum pistons with oil sprayers on the underside of the pistons

3) ZR-1 LS9 used forged titanium rods, forged steel crankshaft and forged aluminum pistons with oil sprayers aimed on the underside of the pistons

As an aside, hypereutectic aluminum is simply an aluminum alloy which is higher in the element silicon than the solubility of silicon in aluminum at operating temperature. The solubility point of silicon in aluminum at operating temperature is around 12%. Hyper aluminum pistons usually have between 16% and 19% silicon, at percentages above 25% there is a big drop in strength. Hyper aluminum pistons are stronger than cast aluminum pistons, but not as strong as a forged aluminum piston, although hyper pistons are much less expensive and have much better thermal expansion properties than forged aluminum pistons. Forged pistons must be set up looser in teh bore than hyper or cast pistons as the forged aluminum pistons expand more in the bore. This CAN lead to noises before the pistons warm up, which is not a great scenario for manufactires of production cars and crate engines in which knocking noises are undesiraeable.


Last edited by Hogg; 06-21-2013 at 09:17 AM.
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