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post #1 of 6 (permalink) Old 05-22-04, 08:41 AM Thread Starter
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Stock Harmonic Balancer

G'Day,

Just wondering what RPM a stock 351 balancer is good to - when would you upgrade to aftermarket job?

Planned revs 6000-6500rpm.

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post #2 of 6 (permalink) Old 05-22-04, 05:06 PM
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Re: Stock Harmonic Balancer

I revved a cleveland way over that regularly..but looking back it wasn't the smartest. If you are going to be giving it a bootfull, it's wise to invest in a better steel damper at least. I think that at high RPMs the stock rubber starts to unbond itself and can alter your timing when you adjust it ( because it has slipped relative to the correct position on the crank ) or I have heard of cades it it just parting company.
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post #3 of 6 (permalink) Old 05-22-04, 06:16 PM
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Re: Stock Harmonic Balancer

Get a new one, it will be cheap insurance, mine is good for 7000rpm, i think it cost me $150.00 .
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post #4 of 6 (permalink) Old 05-23-04, 03:53 PM
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Re: Stock Harmonic Balancer

For $400, why would you take a chance?
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post #5 of 6 (permalink) Old 05-24-04, 04:48 AM Thread Starter
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Re: Stock Harmonic Balancer

Cheap insurance gets me every time! Done.

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post #6 of 6 (permalink) Old 05-25-04, 09:33 PM
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Re: Stock Harmonic Balancer

Stock ones in good condition are good for up to 6,000 ish.

Honestly like everyone else has said, buy an aftermarket one.

I bought a ROMAC for just over $240 and it's good for 9,000rpm.

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