Shortening a Scat Crank

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Shortening a Scat Crank

Post  John Myrick on August 22nd 2016, 6:30 pm

Can a forged Scat 4.5" crank snout be shortened to the Boss length, fairly easily for a good machine shop ?

Determined I'm going with a 12/71 kit from Hampton
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Re: Shortening a Scat Crank

Post  dfree383 on August 22nd 2016, 7:46 pm

Yes and get it double keyed
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Re: Shortening a Scat Crank

Post  68formalGT on September 11th 2016, 10:31 am

What are the advantages to the boss length crank snout othere then more room between radiator and balancer in a N/A or nitrous engine?
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Re: Shortening a Scat Crank

Post  rmcomprandy on September 11th 2016, 10:42 am

68formalGT wrote:What are the advantages to the boss length crank snout othere then more room between radiator and balancer in a N/A or nitrous engine?

Because the damper and pulley are closer to the front main bearing, it has less leverage so it is stronger in use.

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Re: Shortening a Scat Crank

Post  68formalGT on September 11th 2016, 11:13 am

rmcomprandy wrote:
68formalGT wrote:What are the advantages to the boss length crank snout othere then more room between radiator and balancer in a N/A or nitrous engine?

Because the damper and pulley are closer to the front main bearing, it has less leverage so it is stronger in use.

I've heard you can have it set up for a small block damper or is it better to stick with a big block damper?
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Re: Shortening a Scat Crank

Post  rmcomprandy on September 11th 2016, 11:45 am

68formalGT wrote:
rmcomprandy wrote:
68formalGT wrote:What are the advantages to the boss length crank snout othere then more room between radiator and balancer in a N/A or nitrous engine?

Because the damper and pulley are closer to the front main bearing, it has less leverage so it is stronger in use.

I've heard you can have it set up for a small block damper or is it better to stick with a big block damper?

YES ... a 3" long snout for using a small block damper has been done for years but, is now becoming popular.

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Re: Shortening a Scat Crank

Post  Paul Kane on September 11th 2016, 11:52 am

Another option to snout shortening is that you can also play with blower hub and pulley orientation and get the lower pulley right up against the timing cover that way while keeping the standard length snout. This also leaves the future possibility of a bearing support if you care to add one, keeps the crankshaft more resellable to the masses, etc.
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Re: Shortening a Scat Crank

Post  68formalGT on September 11th 2016, 3:20 pm

Is this a Boss snout then?

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Re: Shortening a Scat Crank

Post  rmcomprandy on September 11th 2016, 3:29 pm

68formalGT wrote:Is this a Boss snout then?


3.600" is a Boss length snout.

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