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LS9? LSA? Other?

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Old 03-07-2014, 12:49 PM
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Default LS9? LSA? Other?

I recently got a new job, so I will soon be able to afford to do an fi build. Im looking at superchargers and I had a few questions.
I want to make around 900 rwhp with my current 402 short block.

Will an LS9 or LSA supercharger fit on an LS2 with LS1 accessories?
Would you suggest a different roots style supercharger for these goals?
Can I still use my cable throttle body or would I need to switch to a corvette style TB?
What cylinder heads should I use? Would TFS 245s be enough?
Is my goal attainable?
Old 03-07-2014, 01:22 PM
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I'm not 100% sure that the stock supercharger will make 900whp, but I highly doubt it.
Old 03-07-2014, 02:07 PM
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look up heartbeat supercharger from magnacharger. they made 900+ on race gas. you'll need some LS3 port heads though.
Old 03-07-2014, 02:41 PM
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An LS9 blower will make 880-ish on absolute kill mode on the engine dyno. I would look into other options if I were you.
Old 03-07-2014, 02:48 PM
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HexenLord: I was planning on adding a ported snout and pulley, but Im going to scrap the idea of starting with a stock sc. Thanks for the input.

Killer Z: Ive seen the heartbeat, but only for corvettes. Are they making one for f bodies?

c0ncEpT: LS9 and LSA are off the table. Im glad I posted this question.

I was just looking at cylinder heads. Is there a specific company I should be looking at for a forced induction build. I am leaning towards Trickflow or MAST, but I know there are other companies that make great heads.
Old 03-07-2014, 04:52 PM
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The LSA heads have been over a grand at the wheels in stock form and are great but if budget is of no concern then I would grab the MAST or Trickflow heads. I haven't seen a set of the MAST heads in person or dealt with them but the TFS rectangle port heads that I have seen in person impressed me with the ETs that were gained at lower boost levels and a less aggressive tune up.
Old 03-07-2014, 07:55 PM
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SMOKNSS: I havent set a budget yet. I have Trickflow 225s now, and I love them. Thats why I was looking at them first. Ive also never seen mast heads in person.
Old 03-09-2014, 10:49 AM
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they might be making a tuner kit, where you'd have to fab brackets for the Heat exchanger and intercooler pump. I believe they can do f-body off set pulley. if you go LS9 you'll have to fab up stuff as well. i think the heartbeat system will require less modification. u might be able to get away with not having to chop the cowl. and only require a k-member spacer.
Old 03-14-2014, 09:45 AM
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Why not turbo?

I'd stick with a supercharger if I wanted 700 max rwhp but north of that I'd go turbos.

If you insist on supercharging i would go centrifugal for that much hp, the twin screw are great until 700rwhp. After that I'm not a huge fan unless all out drag suspension and a drag tire for track only.


Do you plan on changing the hood and doing cowl removal?
Old 03-14-2014, 09:46 AM
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Also, I'd set a budget first......



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