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forged or cast crank?

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Old Apr 28, 2009 | 04:17 PM
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i am going to rebuild my lt1. i decided against a stroker due to money. im not sure what my plans are for the future but i have a nx 100 shot of nitrous system, so im definately getting forged pistons, but i dont know if ill be coming out ahead to get the cast crank as it is an awefully lot of extra money for me. any help would be greatly appreciated.

chris
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Old Apr 28, 2009 | 04:26 PM
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When I priced rotating assemblies a 383 was the same cost as a 350
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Old Apr 28, 2009 | 08:33 PM
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These days 350's aren't any more money than doing a 383, especially if you need pistons. There are 383 cranks out there for under $200. And a low budget external balance motor wouldn't be any more than a 350. And a Cast steel crank is stronger than most people think.
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Old Apr 28, 2009 | 08:40 PM
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Go bigger
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Old May 4, 2009 | 10:24 PM
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i understand that the rotating assemly costs the same, but wont i have to spend moremoney on machinework and bigger heads? i really dont have the money for heads and injectors and all the other stuff that goes with. or is all that really necessary
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Old May 5, 2009 | 07:35 AM
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Originally Posted by chrispeck
i understand that the rotating assemly costs the same, but wont i have to spend moremoney on machinework and bigger heads? i really dont have the money for heads and injectors and all the other stuff that goes with. or is all that really necessary
The only additional machine work is notching the pan rails, and enlarging the factory notch at the bottom of the bore.
Bigger heads are not a requirement of a stroke, but most get roped into the "while I am there" frame of mind. My machinest charges $75 for this (notching) service.
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Old May 5, 2009 | 11:01 AM
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well what kind of power gains will i get from a 383 while using stock heads and such?
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Old May 6, 2009 | 12:07 AM
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Originally Posted by chrispeck
well what kind of power gains will i get from a 383 while using stock heads and such?
dont forget about the upgrades to the drivetrain when you start puttin more horses down. just my 2 cents
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Old May 6, 2009 | 12:41 AM
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If your stock crank is still in good shape, get it polished and reuse it. Buy a nice set of forged pistons and rods, and you'll be good to go.
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Old May 6, 2009 | 10:06 AM
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cast crank will probably handle what your looking to throw at it. I wouldnt reuse the stock one though unless you dont plan on modding anything else (its a DD kinda thing).
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