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Working on a serp system for my 67 'Bird. Was curious what the difference is between using a steel vs a plastic pulley. I found one of each that should do the job
 

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Idler? Tensioner? rib side of belt? flat, back side? Just curious...I'm sure a modern polymer idler would be alright with a quality bearing inside...the life of the pulley depends largely on the bearing quality.
 

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Idler? Tensioner? rib side of belt? flat, back side? Just curious...I'm sure a modern polymer idler would be alright with a quality bearing inside...the life of the pulley depends largely on the bearing quality.
It would be a flat 8 rib tensioner pulley. Your basic Dayco pulley for now.
 

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If you have the option of both, why wouldn't you go with metal?

I hate plastic pulleys. I have had a two fail of the years, both by cracking. A metal pulley can fail too, but the failure will be due to the bearing. The same risks exists in a plastic pulley so that's not worth considering, IMO. But metal is much less likely to disintegrate like plastic and that is worth considering.
 

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If you have the option of both, why wouldn't you go with metal?

I hate plastic pulleys. I have had a two fail of the years, both by cracking. A metal pulley can fail too, but the failure will be due to the bearing. The same risks exists in a plastic pulley so that's not worth considering, IMO. But metal is much less likely to disintegrate like plastic and that is worth considering.
Thanks. I was leaning that way. Was just curious of others opinions/experience ..
 
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