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Should I go 347, 383 or 408??

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Old 03-02-2007, 05:17 PM
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Default Should I go 347, 383 or 408??

Is there any reason to go with a 383 over a 408? I was told by someone that I highly trust that a 408 would require much more supporting mods and more money when all is said and done. What do you all think?
Old 03-02-2007, 07:38 PM
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why would a 408 need more supporting mods ? they will both need bigger injectors,both will need a 90/90 and your stock fuel system with an upgraded intank like the racetronix p-n-p should easily be enough.you will need a better rear than stock with either also. pretty much whatever a 408 requires upgrading the 383 will need also.trust me, you won't regret the extra power of a stroker.
Old 03-02-2007, 07:56 PM
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I had the same question to answer for myself 2 years ago, when I decided to replace the stock block with a forged bottom end, since I had piston slap in the stock block.

So, do I go with 347, 383 or 408. After a week of thinking about it, I decided on the 383, by using the process of elimination:

I figured since I was already going ahead with swapping out the block, I might as well spend a little extra money for more cubes. So that eliminated the 347 option.

I felt if I stayed with the LS1 block configuration (383), the car would still be 'stock', or stock like, vs. installing an LS2 block.

So yeah, I left some cubes on the table, but since my car is a Firehawk, I'm very happy feeling the cars engine hasnt been completly gutted, and the car still still fairly standard - just better.

Dumb move on my part? maybe, but its the way I wanted my ride to be.
...my $0.02

Last edited by Michael02hawk; 03-02-2007 at 09:29 PM.
Old 03-02-2007, 08:10 PM
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bigger is better is a fact....well not really but should be. my 402 is a beast the more CI you have the more power and best of all TQ. with the added TQ it is way funner faster and more DD able
Old 03-03-2007, 01:14 AM
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Heads or head work only thing that I can think of costing more money. Also, machining of the block. But Im no expert.
Old 03-03-2007, 01:26 AM
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i went with the 408
Old 03-03-2007, 01:29 AM
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If $$ is not the issue, then the heads and cam come into play + fuel requirements and of course air induction setup.
Old 03-03-2007, 09:43 AM
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408 all the way!




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