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Old 07-12-2006, 10:17 AM
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Powdered metal connecting rods

I've got a GM crate motor and it has powdered metal connecting rods. Im done building it up with all the edelbrock components, heads cam, intake ,and carb. Now a guy at a motor shop is telling me that the rods because they are powdered metal should not be run past 5000 RPM anyone have an opinion on these rods and what they can spin to. My Camaro is running 4-11's with a
4 speed so 5000 is going to be on the low side of what i would want to spin

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Old 07-12-2006, 10:55 AM
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I`ve read the PM rods are good for 450 horses when a good rod bolt is used. I`ve not heard they can`t be used past 5000 rpm, I`ve revved mine to 6 several times and it hasn`t come apart yet.
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Old 07-12-2006, 10:56 AM
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Your motor shop guy is full of it! Go to GM's performance part site. You will see the ZZ FASTBURN 385 is rated at 425 h.p. at 6000 rpm when you add the HOT cam, with powdered metal con rods. Don't listen to this guy, he's just ticked you didn't buy an engine from him!
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Old 07-12-2006, 12:34 PM
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thanks for the peice of mind guys!!!!! I thought he was upset I didnt have him buitd it.
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Old 07-12-2006, 05:14 PM
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You will be fine with the powder rods. GM has been using them for years in the LT-1's. I have used powder rods in quite a few engines I've built for customers. Here is a link to some I have installed in a customers SBC that is running in the 9's,

http://www.competitionproducts.com/p...number=PPF6000

Barry
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