thought id see what you guys think but the deal is in the works already.

decided to change my turbo from my tc78 .96 to a borg warner s380r with a t4 housing 1.25 ar with a race cover should be a better match for my 6.0 .

anyone have any experience with a 380 on a 6.0. thanks.

 

What is the power goal yenkomike? And what size turbine wheel does it have?

Jack

 

the s380 has a 83/75 turbine. same as the std small s475. but t4. what I want is not really a power goal but a good quick spooling car. I feel the tc78 was limiting my top end a little so this one should work from 3000 to 6000 where I want it to and keep everything a good match. the car has been 10.50s at 130 at 10# boost on 93 only . id like to get 10 flat on 93 pumpgas . this should free up a little backpressure. thanks.

 

So is the s380 physically the same size as the s475 t4? Mine is the 83/74 1.10, and I wouldnt want it spooling any slower with this 6.0.

 

I will have it Monday. it is said to be smaller than a s475 and room is a big concern. and that is why I went this direction instead of a s475.

 

Post pics!

 

here is a pic I found s380 on right and I think a tc76.

http://i35.photobucket.com/albums/d1...inTurbos31.jpg

 

Ok. There are four main chassis sizes for the borg warner based turbos. Most refer to them as 200, 300, 400, 500, etc. These sizes are determined by the CHRA, which determines shaft diameter and compressor cover size. within these chassis "categories" you can fit many different sized wheels and housings. For example, we can go as small as 64mm or as large as 83mm in an "s400" CHRA.

Now, keep in mind, these names and categories were mainly started and maintained by the aftermarket. These are not Borg Warner part numbers or anything

The confusing part comes in when the aftermarket starts trying to differentiate a t4 housing s400 80mm compressor turbo from the same thing with a t6 housing with a very simple part number. We played a big role in this many years ago. Basically the only difference between an s380 and an s480 was the turbine housing/wheel. (83mm and 87mm wheels use a slightly different CHRA, but the shaft size and internals are all the same as 96mm). This gets confusing, because an s362 is the same as an s366 with a larger compressor wheel, but an s375 is a totally different chassis. The only reason you know it's an s400 CHRA and not an s300 is the fact that nobody puts 75mm compressors in s300 housings due to airflow restrictions.

The problem with "380" was that it didnt tell the whole story anyways. there are still many different a/r sizes available, multiple turbine wheel sizes, etc. You could have an "s380" with a t4 1.0 83mm turbine, a t4 1.25 87mm turbine, or a t4 1.10 96mm turbine. Alternatively you could have an "s480" with an 83mm turbine .90 a/r t6 housing, or a 96mm turbine and t6 1.58 housing. It just wasn't descriptive enough, and left too much information out.

You can see how it all got pretty confusing. For these reasons we have abandoned that way of thinking. Now, if it is an s400 sized CHRA, with an s400 turbine wheel/shaft, the part number starts with 4. The compressor inducer follows. So, what used to be called an "s380" is now an "s480 with a t4 housing". If it is a standard cast borg unit we call it "s", if it is our billet unit it would be "b480". If it is our batmowheel we would call it a "bmw480", etc.

Hope this helps.

Jack

 

Look at this billet s475, sweet deal IMO
http://www.ebay.com/itm/191388190316?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

 

so my s380 is just a s480 with a race cover and t4 housing and 83 mm turbine. ? if so that's ok to as a t4 s475/83 whould have been what id buy new.

 

Yes. the compressor wheel and cover are exactly what you'd get if you had bought an s480. just a t4 housing with a small turbine wheel.

Jack

 

seems like there is a lot of misunderstanding about the s380/s480 specs. and when I was looking to buy this one I did some homework and found out what you are telling me about it being a t4 based s480 with a 83 turbine. then I found some info saying it might be a 300 series turbo custom machined for a 80 mm compressor.not a lot of good info on s380r turbos .thanks for clearing that up.

the t4 inlet and 4" downpipe vs the 5" is what I wanted. everything else was fine for me.

 

Its extremely unlikely that it's a real s300. You can measure the turbine to be sure. If it is truly a 300 based turbo it would have to be a one off custom unit. We run out of compressor housing with a 68mm compressor on a 300 size turbo. No point going any bigger unless a very unique custom deal.

Jack

 

turbo made it today and it is a s400 cartridge. std 8 blade 80 mm wheel with a 5.5 race cover and a 83 mm turbine with a t4 1.25 housing. I hope it spools good on my 6.0 looking to get it to work with my 3000 converter. but im sure its fine I have a t-brake and launch control to help if needed.