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lsx376 turbo selection

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Old Sep 20, 2013 | 10:54 AM
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From: las cruces nm
Default lsx376 turbo selection
im trying to decide what turbo to use. im broke cause of trans issues but i have on hand a s475 83 mm turbine t6, twin 70mm on3s or i was actually thinking of going with a vsracing gt45 88mm. im wanting around 800 rwhp but will settle for less if i can get fast spool. im currently rear mount t78 turbonetics benita and have huge backpressure issues even at 650hp.
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Old Sep 20, 2013 | 11:07 AM
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Stick with the Borg Warner. Much better piece then the other cheap turbos.
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Old Sep 20, 2013 | 11:49 AM
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What kind of spool and power do you think I'd get out of it with the s475.
Lsx376
Ls9 can
Holley high ram
S475
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Old Sep 20, 2013 | 12:27 PM
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Boost coming in at 3000, and full by 3300-3500 depending on other components.
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Old Sep 20, 2013 | 12:35 PM
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Originally Posted by DrTurbo
Boost coming in at 3000, and full by 3300-3500 depending on other components.

Depending on what other components ? I thought turbo and Camshaft were the only components in selecting a fast spooling setup
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Old Sep 20, 2013 | 12:41 PM
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Originally Posted by toytech93
Depending on what other components ? I thought turbo and Camshaft were the only components in selecting a fast spooling setup
Intake, heads, gears, converter...lot plays into it.

I've spent a good amount of time tuning the LS9 cam with a turbo (that exact S475, in fact) and other cams similar to it. I can say the results are always less than spectacular. That S475 will make good power, but not with that cam. It will have trouble hitting 800 at the wheels but it will spool quickly.
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Old Sep 20, 2013 | 12:50 PM
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Originally Posted by smokeshow
Intake, heads, gears, converter...lot plays into it.

I've spent a good amount of time tuning the LS9 cam with a turbo (that exact S475, in fact) and other cams similar to it. I can say the results are always less than spectacular. That S475 will make good power, but not with that cam. It will have trouble hitting 800 at the wheels but it will spool quickly.
Bingo
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Old Sep 20, 2013 | 04:36 PM
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i have a comp cam with 114 ls and 228/234 at 50 580/595 lift would that get me closer to my goal. i was stepping away from it since my mileage fell off quite a bit with it in.
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Old Sep 21, 2013 | 12:24 PM
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Would it be better to swap out to a t4 turbine housing to get faster spool with the ls cam or should I go with the comp can and the t6.
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Old Sep 21, 2013 | 02:09 PM
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Originally Posted by jordoza777
Would it be better to swap out to a t4 turbine housing to get faster spool with the ls cam or should I go with the comp can and the t6.
If you are really concerned about spool time you can swap to the T4 housing. To be honest though, a T6 with that 83mm turbine won't be too bad at all on a 376 and will make more power, all else being equal. If you're serious about making good power and want to minimize transient response time from the turbo, drop that comp cam you have and send stock48 a message. He'll get you set up with one of his nasty cams that matches your setup and shows awesome power on the dyno, track, and street
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