Scat 9000 vs stock crank

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Scat 9000 vs stock crank

Post  Jmccart on December 30th 2015, 11:10 pm

Get mixed reviews on the scat crank, looking at building another turbo bbf, I've heard the stock ones are as tough as the block about 1200hp. Any thoughts?

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Re: Scat 9000 vs stock crank

Post  Dave De on December 31st 2015, 1:08 am

Scat 9000 cast crank is not steel but its nodular or ductile iron. You dont want to run this crank above 700 hp for many runs. Scat forged will go above 1000 hp.
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Re: Scat 9000 vs stock crank

Post  Gregaust on December 31st 2015, 3:02 am

I thought they were a cast steel , apparently advertised as stronger than standard . Advertised OK for 850 HP I believe . Fine IMO for an aspirated setup, to go turbo i'd be looking to Forged as suggested

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Re: Scat 9000 vs stock crank

Post  dfree383 on December 31st 2015, 7:50 am

If you talking stock stroke a factory crank is tough as nails.
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Re: Scat 9000 vs stock crank

Post  torino501 on December 31st 2015, 9:49 am

id rather offset grind a stock crank 4.140 than buy a scat 9000 in 4.140. at least the factory is a usa piece...

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Re: Scat 9000 vs stock crank

Post  Jmccart on December 31st 2015, 7:17 pm

Thanks I'm gonna test a factory 460 crank see what kinda hp we can make, stock stroke turbo looking 1000hp

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Re: Scat 9000 vs stock crank

Post  Dave De on December 31st 2015, 7:40 pm

Jmccart wrote:Thanks I'm gonna test a factory 460 crank see what kinda hp we can make, stock stroke turbo looking 1000hp
Since you are getting pistons and rods why not offcenter grind that crank for a 2.200 pin and stroke it to make it more square. Big gains for a small cost.
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Re: Scat 9000 vs stock crank

Post  Jmccart on December 31st 2015, 7:43 pm

Will the crank still hold up by offsetting like that?

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Re: Scat 9000 vs stock crank

Post  Dave De on December 31st 2015, 8:32 pm

Jmccart wrote:Will the crank still hold up by offsetting like that?
Many have done it without issue. I would just go with a forged 4.3 crank that has the 2.2 journal.
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Re: Scat 9000 vs stock crank

Post  Jmccart on December 31st 2015, 8:34 pm

Why a 4.3 over a 4.5? What do you recommend?

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Re: Scat 9000 vs stock crank

Post  Dave De on December 31st 2015, 9:09 pm

Jmccart wrote:Why a 4.3 over a 4.5? What do you recommend?
You are going to turbo it so why go 4.5? Also why only 1000 hp when you can easily go 1500 with the boost?
I assume that you are usimg an aftermarket block.
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Re: Scat 9000 vs stock crank

Post  Jmccart on January 1st 2016, 1:57 am

This motor is oem block, both builders have told me they'll take 1200 hp on an oem bbf thoughts?

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Re: Scat 9000 vs stock crank

Post  dfree383 on January 1st 2016, 12:07 pm

Jmccart wrote:This motor is oem block, both builders have told me they'll take 1200 hp on an oem bbf thoughts?

1200 is a little bit much for a reliable oem setup IMO, but it has been done.
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Re: Scat 9000 vs stock crank

Post  Jmccart on January 1st 2016, 5:12 pm

What kind of reliable numbers 1000?

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Re: Scat 9000 vs stock crank

Post  Paul Kane on January 2nd 2016, 2:23 pm

Jmccart wrote:...I've heard the stock ones are as tough as the block about 1200hp. Any thoughts?
I know of OEM 460 crankshafts that take a lot more hp than that (but race-only/high maintenance).  For a twin turbo application personally I'd retain the shorter stroke...but I supposed it depends what you're really building.
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Re: Scat 9000 vs stock crank

Post  Jmccart on January 2nd 2016, 8:25 pm

Plan for this motor was stock block bore just to clean up, h beams forged Pistons, blow through twin gt45 Vic Jr intake, street/ strip car built roller c6

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