s400 on my duramax

LLY

LLY

Diesel Addict
Apr 24, 2008
70
0
6
Idaho
I have a custom s400 off my 12v that I am thinking about putting on my duramax an was woundering if I would still be able to tow with out high EGTs with a good tow tune

here are the specs

5" inlet
4.25" v-band comp outlet
2.5"/63.5mm inducer
3.6"/91.5 exducer
I think its 83.5mm inducer on the turbine
T-4 .90 a/r
 
juddski88

juddski88

Freedom Diesel
Jul 1, 2008
4,651
116
63
Chesterfield, Mass.
it will work, it'll spool nice with the .90 housing but i run the 1.00 housing on mine (not sure what the higher rpm difference would be) and my boost doesnt drop off till around 4200 rpms
 
LLY

LLY

Diesel Addict
Apr 24, 2008
70
0
6
Idaho
Sweet,will I still be able to tow,casue I use my duramax to pull my 12v around in the summer to all the sled pulls,when my trailer is loaded it probably weighs around 12k
 
LLY

LLY

Diesel Addict
Apr 24, 2008
70
0
6
Idaho
also should I keep the 90AR on there for towing or should I put my 1.00 AR on?
 
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SSchmi5519

SSchmi5519

LLY Cult Leader
Oct 19, 2008
3,387
1
36
Arizona
LLY said:
Ok so now this might be a dumb question but would you rather have that s400 or would you rather have twins
Click to expand...

Technically what you have is a S464.

Twins can spool quick and have a nice top end. A single can spool quick or have a nice top end, or anywhere in between.
 
LLY

LLY

Diesel Addict
Apr 24, 2008
70
0
6
Idaho
Ok, well my torq converter has a stall that is close to stock,an im wanting to bump it up to maybe a 1900 or 2k stall
 
othrgrl

othrgrl

Diesel Addiction Owner
Mar 10, 2008
2,149
2
38
Wilmington NC
www.mydieseladdiction.com
That charger would be great for DD and street driving. For more performance I would go bigger on the compressor and you would still be able to tow fine. I tow another Duramax behind my truck with a 5.5" inlet race cover on a 75mm compressor, with an 83mm turbine in a 1.0 housing. I also played with a .9 housing for a while and that is what was on it for the numbers in my sig. Have also towed with an S472 with a 1.1 AR turbine housing with no problems.
 
LLY

LLY

Diesel Addict
Apr 24, 2008
70
0
6
Idaho
othrgrl said:
That charger would be great for DD and street driving. For more performance I would go bigger on the compressor and you would still be able to tow fine. I tow another Duramax behind my truck with a 5.5" inlet race cover on a 75mm compressor, with an 83mm turbine in a 1.0 housing. I also played with a .9 housing for a while and that is what was on it for the numbers in my sig. Have also towed with an S472 with a 1.1 AR turbine housing with no problems.
Click to expand...

How much bigger would you go on the compressor side?Also I have a s480 do you thinik I should put that on there or is that to big for DD an towing? an have a custom s477 with a 100mm turbine but the compressor is shaved to fit in a 2.6 class,
 
juddski88

juddski88

Freedom Diesel
Jul 1, 2008
4,651
116
63
Chesterfield, Mass.
you looking to get rid of the custom 2.6 turbo too? was it also built by Gillette?

in addition:
i think the 480 is too big for a stock motor dmax, slow spooling, and pretty unusable.
i like the S64X i run (464) but you can go to a 66 or 68 compressor wheel with that same turbine side if i'm not mistaken.
 
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