crank mandrel?

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crank mandrel?

Post  557ranger on March 25th 2014, 2:31 pm

Ok I got a short snout bryant crank with romac balancer so a small block crank pulley fits so I ordered a mandrel drive to fit it don't fit right. I assume it should sit tight to balancer but does not. Anyone have a idea of what I need or what measurements I need to get the right drive? The drive I got is the areospace components sbf 4 bolt. The only numbers on balancer Are A364536. Any help would be great!!
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Re: crank mandrel?

Post  powerstrokeace on March 25th 2014, 6:48 pm

your numbers on the balancer are just and SFI serial number. You should swap out for a ATI or Innvation dampner.

Ace
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Re: crank mandrel?

Post  Wheelie58 on March 25th 2014, 7:34 pm

There is a head-spinning array of bolt patterns and register depths and diameters on the selection of dampers out there. I am not familiar with the Romac. It is common for the manufacturer to use a center register size that does not agree with the bolt pattern they use.
In some cases, it takes some minor machine work to make everything fit properly,
It seems that there is no "standard" for the front of aftermarket dampers.
If your bolt pattern lines up, but the center hole is too big or too small, just machine the mandrel or make a spacer to make it center up.
Keith
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