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Speed Inc. 348 Short Block

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Old Jun 8, 2005 | 01:13 PM
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Default Speed Inc. 348 Short Block?

What do you guys think of this set up it seems reasonable
I want around 600hp boost like 15psi but i want it on the safe side

Last edited by YOUR03COBRA8ME; Jun 8, 2005 at 01:23 PM.
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Old Jun 8, 2005 | 02:18 PM
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15psi in a 348 LS1 should put u over 700rwhp with the right Turbo. If u just want 600rwhp then 10-11psi should do it with the right Turbo.
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Old Jun 8, 2005 | 02:35 PM
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As far as this motor goes good bad or other
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Old Jun 8, 2005 | 02:37 PM
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Originally Posted by YOUR03COBRA8ME
As far as this motor goes good bad or other
forged bottom end should be no prob for 600rwhp a stock crank is all that is needed too
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Old Jun 8, 2005 | 02:55 PM
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motor should be just fine
You should hit ur goal fairly easy
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Old Jun 8, 2005 | 03:12 PM
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You should have no problems with a short block built by them, especially with only 600 rwhp. They do quality work. I think they have one of their 348's putting 840+ rwhp with one of their turbo kits. (reference wicked's car!! )
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Old Jun 8, 2005 | 03:16 PM
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im getting a very similar setup...are you sure about that 700rwhp number?i was looking for 15psi as well(which both miine and You03cobra will handle) but that seems like a high number with just 15psi.
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Old Jun 8, 2005 | 03:17 PM
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I have a 8.2:1 Speed Inc. Shortblock making 754rwhp thru a T400.
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Old Jun 8, 2005 | 03:20 PM
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at what psi?my CR is gonna be about 9:1 which is where the Spped Inc SB is at i believe.not meaning to steal the thread but we're basically in the same situation
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Old Jun 8, 2005 | 03:23 PM
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Originally Posted by ddnspider
im getting a very similar setup...are you sure about that 700rwhp number?i was looking for 15psi as well(which both miine and You03cobra will handle) but that seems like a high number with just 15psi.
Don't forget these are V8's. When people think of a boosted car's they think of the 4 & 6 bangers that need like 20+psi to make big power.
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Old Jun 8, 2005 | 03:25 PM
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21 psi, t400, blower, and my cam was not picked for peak hp. I made 735rwhp with 17psi and a different cam, but it was peakier.
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Old Jun 8, 2005 | 03:27 PM
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very true.im just curious what sort of numbers to expect with say 12-15 psi.i KNOW im going to run out of turbo with the T67 that came with my Phamspeed kit.i was told by the sponsor building my motor that im good for anything under 20psi or 1000rwhp,whichever comes first which is always good to know
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Old Jun 8, 2005 | 04:05 PM
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Depends on your cam size, how well your heads flow, and the size of the turbo.
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Old Jun 8, 2005 | 05:12 PM
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Originally Posted by ddnspider
im getting a very similar setup...are you sure about that 700rwhp number?i was looking for 15psi as well(which both miine and You03cobra will handle) but that seems like a high number with just 15psi.
Maybe 15psi with a T76 will do 700rwhp, but i dont know about the T67. Why dont u just get a larger turbo and call it a day
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Old Jun 8, 2005 | 07:29 PM
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cause i just changed my mind and am going with custom pistons and a 383
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Old Jun 8, 2005 | 09:17 PM
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Originally Posted by YOUR03COBRA8ME
What do you guys think of this set up it seems reasonable
I want around 600hp boost like 15psi but i want it on the safe side

i will stand behind anythin speed inc puts togeter.. contact them great customer service
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Old Jun 9, 2005 | 06:26 AM
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sweet good deal guys thats for the info
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Old Jun 30, 2005 | 11:04 PM
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Who builds their motors?
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