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Old 02-01-2015, 06:35 PM
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For the mid mount for sure.
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Old 02-01-2015, 09:29 PM
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Originally Posted by GMCtrk
S475/83 is way too much turbo on a 4.8 for his goals. For what he wants, an S366 would be my choice - optimum combination of power potential and spool.
sorry, got side tracked watching Seattle blow the game on the one yard line

But thank you i will definately look it up. would anything else change being that it is a mid mounted turbo? Would it be best to get a cam off the shelf or should I get one cut? I read somewhere that turbo set ups require a different kind of cam.
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Old 02-01-2015, 10:36 PM
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Keep the overlay down and you will be golden
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Old 02-02-2015, 01:00 PM
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What you want for a mid mount and will mostly likely fit your pipes (T4 inlet, 3"vband outlet) is a Precision PT72/68. .96 a/r will be fine for there.

If you really cheap, then go with an On3 T70 with .96 a/r.
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Old 02-02-2015, 05:27 PM
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I got over 600whp out of the mp70 on a stock bottom 4.8. kb racing kit, 221/221 lunati cam. lot of guys love the triple 12 cam. s475 is overkill for 500hp. my mp70 will probably be up for sale within the month.btw
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Old 02-04-2015, 06:21 PM
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How much boost did you have to run to reach the 600 mark black4.8?
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Old 02-05-2015, 06:51 PM
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How much boost did you have to run to reach the 600 mark black4.8?
it peaks at 16# at 4500rpm. that's all that little turbine wanted
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Old 02-05-2015, 07:35 PM
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I'm good with that for a starting point before I pull the 4.8 and upgrade turbo!
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Old 02-05-2015, 08:33 PM
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Love my 70mm on my stock 5.3
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Old 02-20-2015, 06:27 PM
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Mine is a bw s366 66mm .91ar 2.25" in 3.5"downpipe dumped behind cab
Running 10psi for now....have only drove it bout 150 mi after tune and very good street manners...and havent got it on a dyno but im pretty happy...sounds awesome too...
Prolly being laughed at for havin that small of a turbo lol
But i sure like it...
Pretty confident that its over 450hp...
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