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Ported TB and LS6

Old Feb 25, 2010 | 10:58 PM
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Default Ported TB and LS6

How much hp can a LS6 intake and stock ported TB support on a 346? I'm sure there is some subjectivity to this, but est?? My cam lift is .600 and heads flow 301 at .600, if that is even relevant.
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Old Feb 26, 2010 | 12:35 AM
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15-20RWHp Dont know cfm of intake but its you can 2.2 hp for every cfm I think. Someone Please correct me if im wrong.
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Old Feb 26, 2010 | 06:19 AM
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Thank you for the reply, but I was leaning more towards how much total engine hp it will support. Like 400, 450, 600 rwhp.
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Old Feb 26, 2010 | 06:25 AM
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i for answer, because the FAST stuff is pricey
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Old Feb 26, 2010 | 01:26 PM
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You see a good 15-20 hp, good mod.
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Old Feb 26, 2010 | 01:29 PM
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i've seen people make 500rwhp with an ls6
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Old Feb 26, 2010 | 02:16 PM
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That's what I was looking to see, thank you. Anyone else seen 500 or better?
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Old Feb 26, 2010 | 03:37 PM
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I think mightymouse was doin like 700hp on his. I may be wrong tho. It's been awhile since I read that issue of GMHTP. I personally know of a couple of guys who were making a lil over 500hp with the LS6 and stock ported TB also. So yeah it'll hold.
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Old Feb 26, 2010 | 03:44 PM
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700 hp is alot! The Fast stuff is pricey but its been proven to do good things. A painted Fast is beautiful under the hood also
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Old Mar 1, 2010 | 08:48 AM
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I agree, but tapped out at the moment, and just assembled the short block yesterday. I'll get it together and see how the tune goes. A neighbor at the shop is heas of R&D at Painless Wiring, and told me a stock LS1 TB flows something like 800 cfm.
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Old Mar 1, 2010 | 06:43 PM
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I think 800cfm is about right. I'm making 420rwhp on H/C setup, with 150 shot it should put me around 550 or so.....
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Old Mar 2, 2010 | 03:53 AM
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I read in a Summit Racing Catalog that ls6 are only meant for 425 hp. Guess not obviously. Just wondering why they would say that...
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