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Old 01-24-2007, 05:09 PM
John
 
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Can I make a 383 strocker out of a 5.3 ltr

I have a 5.3 in my 2000 pickup and Ive been told it is a destroked 5.7, if so, I was wondering if I could go the other way and make a 383 stroker out of it and if so what kind of performance gains would I get. I don't think it is the LS4 as It has the aluminum Vortec heads, but iron block.

Any input greatly appreciated.

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Old 01-24-2007, 05:38 PM
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diffrent engine faimily all togther.
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Old 01-24-2007, 06:19 PM
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5.3 to 383

a 5.3 can be built to 383 ci. i can't find my specs at the moment but when i do i'll post 'em
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Old 01-24-2007, 06:57 PM
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The 5.3L uses the same stroke as the Gen III 5.7L and the 6.0L at 3.622" The 5.3 has a 3.779" bore, the 5.7L has a 3.893" bore and the 6.0 has a 4.00" bore. Even if you were to take the 4.00" stroke out of the new 7.0L you're only going to end up with a 359" V8. And I don't even know if that crank would even fit. Unless there's an aftermarket crank somewhere with a 4.25+" stroke I highly doubt you're going to stroke your 5.3 out to a 383.


BTW, the GEN III 5.7L shares nothing in common with the older Gen I/II 5.7L/350

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Old 01-25-2007, 02:53 PM
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Quote:
Originally Posted by Defiant
a 5.3 can be built to 383 ci. i can't find my specs at the moment but when i do i'll post 'em
Is this a kit that you speak of or just an accumulation of parts, either way I would be really interested to know how you did this. If there is a site that you know of were I could see this I appreciate any info you have.

thanx john
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Old 01-25-2007, 03:52 PM
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Contact these guys and ask. They've been doing stroker kits since I was a kid (a long time ago)......
http://www.speedomotive.com/StrokerCranks.aspx
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