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Old 12-18-2011, 12:34 PM
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Default Flywheel and couplers for B1 question

I built the hp500's in the spectre over the last month and am about to send the internals for balancing, I want to change the flywheels and couplers because the factory flywheels weigh 43lbs!! And the couplers are the weak rubber aluminum standard junk. I've looked at Teague and CP performance, and if their lightweight flywheels will work that's fine, but what should I do about couplers? The engines will make around 675 NA
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Old 12-19-2011, 01:01 PM
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We use the Mercury Steel Core P/N: 861523A20. They hold up well to 800HP+.

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Old 12-19-2011, 04:35 PM
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Is that coupler a short or long snout?

Thanks!
Dick
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Old 12-20-2011, 02:43 PM
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Originally Posted by BadReputation
I built the hp500's in the spectre over the last month and am about to send the internals for balancing, I want to change the flywheels and couplers because the factory flywheels weigh 43lbs!! And the couplers are the weak rubber aluminum standard junk. I've looked at Teague and CP performance, and if their lightweight flywheels will work that's fine, but what should I do about couplers? The engines will make around 675 NA
The heavy flywheels help the engines stay running in and out of gear at low rpm.
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Old 12-20-2011, 05:10 PM
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leave the heavy flywheels..
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Old 12-20-2011, 05:18 PM
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Originally Posted by blue thunder
The heavy flywheels help the engines stay running in and out of gear at low rpm.
found this very true on low torque manual transmission cars didnt realize it would be found in a big block marine app good to know
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Old 12-21-2011, 07:02 PM
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We run 36lb LSC Billet flywheels on all of our TCM engines. We use the Mercury steel coupler (extended external coupler). -Eric
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Old 12-21-2011, 07:04 PM
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Originally Posted by Mr Gadgets
Is that coupler a short or long snout?

Thanks!
Dick
Long snout!

TEAGUE CUSTOM MARINE
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Old 12-23-2011, 06:07 AM
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Ok.. thanks Eric..
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