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  #1 (permalink)  
Old 04-25-2007, 03:45 PM
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Default Cast Iron versus Steel Crankshafts

While researching crate engines and actually having ordered a Chevy BB in the past, I don't understand why steel cranks can be so common or standard in Chevy engines, but when it comes to Fords, such as the FE's, the crate engines advertised always come with a cast iron crankshaft. Why is this? Even what I would consider an expensive engine, say $15,000-$20,000, the engine builder will supply a cast iron crankshaft. Steel would seem to be very cheap to just add as a standard to these engines. Thank you for your input.
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Old 04-25-2007, 03:49 PM
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Aftermarket cranks are not cast iron. They're steel....cast, forged, or billet. Take your pick.

The engines that you're looking at for $15-20k are not cast iron cranks. At the very least, they're Scat cranks....cast steel.

There are some manufacturers making forged FE cranks now. Plus Scat will make you a billet one for $2-3k.
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Old 04-25-2007, 03:55 PM
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Sorry, I miscommunicated. I did mean forged versus cast steel. Thank you for the correction. Most crate engines for Chevys, a forged crank is an afterthought, while a forged crank for an FE might/could be $2,000-$3,000 as you mention. I don't understand why.
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Old 04-25-2007, 04:01 PM
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Just to continue, a stroked 427 crate engine with either a Genesis, Pond or Shelby block, Edelbrock heads, Erson or T&D roller shaft system, these are all top shelf items, but it would just seem to me that for a few extra $$, a forged steel crank could be included. Maybe some might find it unnecessary for an engine that won't see 6,500-7,000 RPM's.
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Old 04-25-2007, 05:15 PM
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Like Brent said, a forged crank IS now available. Not much long term data on them yet. Survival Motorsports has them. I suggest you do a search on fordfe.com. Barry R. has reviewed them over there.

phil
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Old 04-25-2007, 06:17 PM
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It probably is necessary....Keith Craft builds some wild FE's (over 700hp & 6500rpm) with Scat cranks. Apparently he's not scared of them.

Forged cranks are now available through a couple of vendors.
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Old 04-26-2007, 03:25 AM
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Actually the Eagle/Scat cranks are not cast steel. It's a marketing ploy.. They're actually a good grade of nodular iron.

The FE cranks are a "beefier" in key areas then the Chebbies, hence the much reduced need for forgings. It's not uncommon to see OEM cast Ford FE cranks seeing 600-700 hp without failures. That's probably why Kieth Craft uses the nodular iron cranks in his 600 hp FE stroker builds.

I'd also heard that these new "Chinese" (off-shore at the very least) forgings have been racked with problems and quality control issues. I would not trust them, IMHO, until time and useage has proven them reliable.

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Old 04-26-2007, 05:19 AM
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Talking Buy the good stuff if you want it to live

dont put cheap crap in your engine if you want it to live Crower makes exellent cranks and they dont need a bunch of machine work for Heavy metel t go zero ballance you give give them the specs they will make whatever you want
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Old 04-26-2007, 05:26 AM
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Tell Keith Craft he's putting cheap crap in his engines.

Crower does not make FE cranks.

Sure, give them the specs....let them charge you $2500 for a custom crank. 99% of the people on here don't have motors strong enough to break a new Scat crank.
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Old 04-27-2007, 04:34 AM
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Quote:
Originally Posted by blykins
Tell Keith Craft he's putting cheap crap in his engines.

Crower does not make FE cranks.

Sure, give them the specs....let them charge you $2500 for a custom crank. 99% of the people on here don't have motors strong enough to break a new Scat crank.
I thought Crower would make a custom billet FE crank? I know they make rods but was under the impression cranks could also be had for a tidy sum?
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Old 04-27-2007, 04:56 AM
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That's what I was saying.....you could give them the specs and let them make a custom one for you.....bet it's big $$$
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Old 04-27-2007, 08:58 AM
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When I purchasing a crate engine for a BBC, I was told by several vendors that all the Eagle, Scat and CAT parts are made offshore. The higher end parts made and sold by Lunati and Crower are made in the USA. I think that there are a lot of offshore parts in a lot of people's engines out there that are doing just fine including me.

Using a Big Block Chevy as an exmaple, the upgrade from a nodular iron crank to a 5140 forged crank is about $700. Add about another $300 for a 4340 forged crank. These seem like reasonable prices to me and I was only curious why this can not apply to FE Fords.
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Old 04-27-2007, 04:17 PM
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It does apply to the FE - now. I'll try to keep this from sounding like an ad - so prices are generalizations, and simliar parts are certainly available from multiple vendors including Keith, who sponsors this forum.

The Scat cast stroker cranks run just under $800 on average. They take a couple pieces of mallory to internally balance.

We can all get import steel forged 4.25 strokers that sell for only a few dollars more. These are non-branded parts, and I do not feel that the machining quality is at the same level as the Scat product. My personal preference is to invest a couple hundred bucks into these and have them locally prepped. The total cost ends up just past a grand - - a pretty reasonable upgrade per dollar. The couple I've balanced here have taken three pieces of mallory...so you're looking at a +/-$350 cost bump.
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Old 04-27-2007, 05:08 PM
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Default Cheap cheap cheap

Tell him your self they are cheap forien sh#*t if thats what u want in your car go for it!!!!!!!
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Old 04-27-2007, 05:11 PM
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so barry what is the benefit of running the non branded steel crank over the scat crank?, is the extra money worth spending on a engine built for the street? i thought scat and eagle stuff were made off shor also?.

Last edited by wrench87; 04-27-2007 at 05:19 PM..
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