Jianshatch

So I know there's a turbo guru on here and I can't find if this turbo is legit , I wanna make 600 wheel street car so faster spool the better budget is like 600$." borg warner airwerks s300sx3 is that a good turbo for my use and budget. Here's a link if u wanna see , option to go twin scroll aswell https://www.ebay.com/itm/181762883378 .
specs are below

• Compressor Wheel Inducer Diameter (mm): 66mm
• Compressor Wheel Inducer Diameter (in): 2.6
• Compressor Wheel Outer Diameter (in): 3.6
• Turbine Wheel Outer Diameter (mm): 80mm
• Turbine Wheel Outer Diameter (in): 3.14
• Turbine Wheel Exducer (mm): 73mm
• Turbine Wheel Exducer (in): 2.89
• Turbine A/R: 0.88
• Turbine Inlet Style: T4
• Scroll Type: Open

2kdrift

600HP on the street is useless IMO. also neither one is a twin scroll

1HGEJ2

iTrader: (1)

I have the bw s200sx and it makes a great spool for a jb bearing turbo. U need 2 wastegates. This big turbo makes much boost. Im using 2x precision 46mm wg and hold 16psi perfect. Stock k20a2 block. The bw s200sx have a rebuild kit when u blow it. That was an option for me. Cheap turbo, twin scroll and a rebuild kit to fix the turbo.

Jianshatch

I think I want the s200sx

TheShodan

iTrader: (14)

Adjusted a few things for you, there, sir. ,
Although the same can be done very easily without the additional cost in a second wastegate. That money alone could be used for a better turbo unit.

Jianshatch

I have a 44mm turbo smart wastegate planned on running high boost 25psi ish do you think I'll be good I plan on having a some one streetable highway racer and a good top end track car

1HGEJ2

iTrader: (1)

thank u
Im in germany and u get the bw very fast. My buddy is using an garret t3/t04 turbo with 60trim and it cost more then my bw s200 and its only in usa avalaible. Im very happy with my setup. partnumber is 177268 and up to 580hp

TheShodan

iTrader: (14)

That may be the case in cost. but the 60 trim is not necessarily a 60mm, so that is not a fair comparison at all to try and use.. I've been to Germany several times, and both Garrett and BW work well. Cost or not, some applications are better than others. For the cost of the additional wastegate, you could have almost gone custom on a single turbine inlet and not have these problems.

It's all in the solution, not just the cost.

Jianshatch

i should go open scroll vs twin scroll then ?

TheShodan

iTrader: (14)

stop the "scroll" talk, please. It's not even being used in your application right now or at all, so it's unnecessary to keep addressing it that way. It's like calling a llama a camel; sure they both spit at you when they are annoyed but they are hardly the same animal.

But to answer your question, yes. A single turbine entry with a slightly smaller turbine housing and larger overall wastegate, along with better ignition timing in the tune (not so conservatively rich) will help with this immensely.

True twin scroll behaviour isn't really experienced at these sizes anyway. You can thank Full-Race and their marketing department back in 2004 for creating your confusion with the terminology misnomer on the interwebs.

extremeracer

The new(er) S257 SX-E seems like a nice package with a high flowing new generation 57mm compressor wheel and the fast spooling S200 turbine wheel. You can order it with a 0.63 T3 "open" housing from companies like AGP Turbo which should suit your needs. They sell a variety of other T3 and T4 housings as well.

TheShodan

iTrader: (14)

Yes, yes.. Smaller. I like this thought process, and your use of proper terminology.

Jianshatch

last question if I was to go with the bw s200sx which variant of the turbo best suits my needs with the fastest spool able to hit mid 500 wheel . I'm very lost when it comes to a/r and inducer difference specs are

TheShodan

iTrader: (14)

I mean, you're kinda locked in, here. You'll need the 56mm inducer and that comes with the 76mm wheel diameter on the compressor side (slightly smaller than a GT3076R by comparison for those that need to see this in a more familiar light)
Then all of the turbine wheels are 70mm, (which is good to over 600whp anyway) and that's similar to like a GT(X)35R Turbine wheel family in terms of size, but not profile, so that's not bad.

The problem is you need their smallest turbine housing in the .83A/R and the only choices that come with that as a CHRA (according to the chart you're showing) are using compressor wheels that are too small, or will be working their asses off trying to keep up with the turbine wheel. I don't cross-reference the S257SXE with anything from this chart you're including, so..... .

Show the whole chart or get the info regarding the S257-SXE (which sounds like a nomenclature made up by a 3rd party Dealer).