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Discussion Starter #1 (Edited)
as above,,,
i've a vague idea of what all the turbo numbers mean, but what relavance they have to the world i dont know so i thought i'd ask here to see if anyone knows about it,

This is an upgrade turbo for the silvia's, HKS peg it at the 320 hp range on a 2ltr silvia,,, how does that change when you get to a 1.6 honda?
(its a vitara build btw)

here's the magic numbers:

GT - SS PS13 / SR20 DET
TURBO SPECIFICATION

Model: GT-SS
Included control Device: HKS Uprated Actuator
Rated Power for 1 Unit: (PS) 320


Compressor Wheel
Trim: 60
Inlet Diameter (mm): 46.6
Outer Diameter (mm): 60.1

Compressor Housing
Trim: GT-SS Specific
Inlet Diameter (mm): GT-SS Specific
Outer Diameter (mm): 0.60


Turbine Wheel
Trim: 76
Outer Diameter(mm): 53.8
Outlet Diameter(mm): 47.0


Exhaust Housing
Inlet Flange: GT25
Outlet Flange: S/V GT25
A/R: 0.64


and a pic: (cos every one likes pics)
 

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Discussion Starter #3
cool cool, what sorta power are ya making?
i'm hoping for a good strong 330whp with very fast spool, at a random guess i was thinking 16psi,
any idea if i'm heading in the right direction?

mods:
skunk 2 intake,
polished head,
mild cam,
will build a mini ramhorn,
3inch dp and exhaust,
2.5inch intercooler piping, big ish core,
 

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as he said the turbo will max out around 21psi and 300hp.

Im running around 9 psi on my build and i est. its making around 180whp. Read some dynos of people with similar setups and that the net of them.

also remember whp and hp is different.
 

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Discussion Starter #10
Read a compressor map
hks didnt release compressor maps :(


Turbine flow limits coupled with the high VE of Honda heads will lead to flow stacking, lowering efficiency of the system as RPMs climb.
bigger hotside and maybe you see 300 that would be pretty cool.
^^^ so are you guys sayin that seen as the honda engine flows better than the nissan sr20det that the exhaust gas is basicly going to traffic jam in the exhaust manifold?

any idea where this will get power wise on a d16?
is it time to start looking for a new turbo?
 

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Yes, just about Any Honda engine flows better than most other similarly sized engines. Manifold design, cam, and the turbine housing all play a huge role in how efficiently the engine produces power at high RPMs.

HKS is going to have a super secret special sauce compressors. Take your measurements, match them up with a similar known wheel and you'll have at least a very good guestimate on the flow rates.
 

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Discussion Starter #14
after a bit of random math it seems its smack bang in the 77% efficiancy range at 18psi, which is a good thing i'm guessing :)
 

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Discussion Starter #16
lol, how is it? what sorta power you making at what boost? responsive?
any other major mods?
 

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Discussion Starter #18
i know ye, but i'm curious how the 2871 did,
i'm comparing the hks gt ss to the 2860,
 

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It's no where near the same as the 2871, especially on the turbine side.
I was actually speaking 100% about the looks of it lol.

And the car isn't running yet.
 
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