S480 408 turbo question

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Oct 5, 2015 | 12:24 PM

masonS13

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S480 408 turbo question

I have a 408ci stroker ls and am going forced induction. Car is around 9.5:1 cr and my question is, will a s480 t6 1.1ar get me to my power goal of around 900whp? It's a six speed car that's why I was wanting to run the 1.1ar instead of 1.32 so it would have faster spool time. Its a street car as well. Has ported LS3 top end and a 102mm tb. 1 5/8 headers with 2.5" cross pipe and 4" down pipe.

Oct 5, 2015 | 01:43 PM

DavidBoren

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Are they flipped shorty headers? Or are you considering a mid/rear-mount turbo?

Either way, yes, the t6 s480 can get you to 900rwhp through a 6spd.

Oct 5, 2015 | 01:51 PM

masonS13

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Awesome. You think so even on 93 octane? And they're cxracing turbo headers for 240sx.

Oct 5, 2015 | 02:07 PM

240LSEX

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Quote:

Originally Posted by masonS13

Awesome. You think so even on 93 octane? And they're cxracing turbo headers for 240sx.

No way on 93 only. 93+meth should get you there as well as e85.

Oct 5, 2015 | 04:07 PM

jrpimp00

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I got to 800 on low boost, 93 octane and 12psi on my 408 and s480 through an auto. Added the meth for cooling afterwards

Oct 5, 2015 | 04:48 PM

masonS13

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I'll be happy with 800whp lol.

Oct 5, 2015 | 04:48 PM

masonS13

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Quote:

Originally Posted by jrpimp00

I got to 800 on low boost, 93 octane and 12psi on my 408 and s480 through an auto. Added the meth for cooling afterwards

This with a 1.1 ar?

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Oct 5, 2015 | 08:25 PM

Kmspeedie

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on my 416 i made 900 at 18psi with a t4 s480.... so your fine lol. mines billet wheel 1.32 but t4! and compact compressor cover

Oct 5, 2015 | 08:29 PM

#10

masonS13

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Quote:

Originally Posted by jrpimp00

Sorry, no 1.32

6 speed car?

Oct 6, 2015 | 12:44 PM

#11

LJMSJohn

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96/1.32 would spool fine on a 408 if you do the crossover right.

Oct 6, 2015 | 03:47 PM

#12

masonS13

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Quote:

Originally Posted by LJMSJohn

96/1.32 would spool fine on a 408 if you do the crossover right.

Elaborate please.
Didn't know there was a wrong way lol.
It'll be 2.5".

Oct 6, 2015 | 03:48 PM

#13

masonS13

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It will look like this when finished.

Oct 8, 2015 | 10:08 AM

#14

LJMSJohn

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Quote:

Originally Posted by masonS13

Elaborate please.
Didn't know there was a wrong way lol.
It'll be 2.5".

We've done the back to back testing with 2.5 merged to 3 versus a fully divided to the flange 2.25 using a Borg Warner turbo. The fully divided crossover made the turbo respond right at 500 rpm sooner.