Wondering how this turbo will run with my 13B-RE extended street port. The car is street legal but setup for drag racing with the mods necessary to hit 600+. I am wondering if the porting on my motor will work with this turbo or if the turbo is overkill. I've seen people running this turbo are half or full bridge. I am not concerned how it drives on the street but more so on the track. I am shooting for 10 sec or better.

specs on the turbo are

Turbocharger Name - S475
Compressor Wheel Inducer - 75mm
Turbine Wheel Inducer - 96
Turbine Wheel Trim - 96
Turbine Wheel Part # - 410100-3
Turbine Option - Outlet - V-Band
Turbine Option - Inlet - T6
Turbine Option - A/R - 1.32

 

Nothing 2 step can't do yes?

 

i've said it a lot lately, this is my favorite turbo as of late. Make your life easier, there are now Two companies i know of that machine the turbine and utilize T4 housings. they still have the ETT and spool up like a gt42R but are capable of a tad bit more power at half the cost!!!!

Dave @ Majestic turbo's and Mike Turbo Inc. have the custom T4 versions of this turbo. if your serious then go this route... the T6 is un-neccessary for your goals!!!

if you only want to run 10's tho.. you could do that on a muuuch smaller setup

 

Yeah good units indeed. The guys in my sig below do engineering for BW units. They have the T4's with 3 different turbine wheels in them now, also the T6's and now the new high flow .98A/R race compressor covers as well. Also the ball bearing prototypes are done, and they look good.

 

Thanks for the info guys, the main reason I was looking at this turbo was cost, however the need to fabricate a T6 mani will pretty much eat up any savings that would had. The T4 looks like it may be the way to go, right now my goals are 10 seconds I don't want to set the bar too high, but on the other hand I don't want to have to buy another turbo and at the same time, don't want to buy a turbo that is not going to work my my setup. I drive the car to the track so it still needs to be driveable but im not looking for a turbo that has good street qualities, I want something thats going to fully spool by 5k and make 30 psi + of boost to 9k with my engine.

 

A RX3 owner on this board went 11.2 with one on EIGHT psi. Probably overkill for 10's. But, if your anything like me, you embrace overkill.

 

i agree they are great units... i spent 1000 on my 42 and a buddy spent 650 on a new 475

his is on a 6 liter truck motor in a grand national

his BW sounds amazing compared to the gt42...... almost annoying

 

This car runs a off the shelf S475.

http://www.youtube.com/watch?v=DArzD6ymMNg

 

check out www.twinsturbo.com they are a distrubutor for borg warner/bullseye turbo

 

if you are interested here is a picture of the BW S380's
80mm comp with a T6 compressor cover with T4 turbine. we have 2 turbine wheel options as of now and working on a few more with bullseye power.

S380 w/ 1.10 A/R


87mm turbine



S380 vs S366 for scale



S380 vs hefeweizen..again for scale......




Eric

 

forgot to mention on a piston engine should produce between 550- 1300 HP.
and sorry but I don't have a Compressor chart to share as of now.
Also, look at that frost coming off that Heff......MMMM beeer.....

 

The BW S475 is a KILLER 13B turbo.

The box unit with the T6 turbine housing will fully spool before 5k rpms. It will start to see positive manifold pressure in the 3.5k rpms range. The will out perform a GT42 for less than half the price.

Now throw on some custom combos like the S480 or some smaller turbine housings and they will rock your WORLD!!!!

The one thing that Borg warner turbos have is a TON of options for turbine wheels. As most of you know you can't hardly have a big enough turbine wheel on a rotary.

 

Agreed, finding a T6 flange manifold is another story. The only option I see right now is either fabricating one or modifying a T4. The s475 is a cheap option for big power, but the manifold will eat up any savings that may be had with the cheap turbo. As soon as you get into S370 or bigger series the prices are more in line with the garret turbo's so I really have to look at the maps to decide which option to take, I like the s375,s378,s380 but they are in the GT42R price range.

 

half the price and still BB or not? if its not BB then how does is spool like a 42R?

 

non bb, and that is a great question, I'd love to know how it spools like a 42R without the BB. The S475 is 1/4 the price of a 42R 1/2 the price of a GT42. Maybe its being compared to a GT42 and not the GT42R ?

 

I tend to lean towards the they don't "outspool" a BB unit with a nonBB unit camp. You will be told how the wheels have better aerodynamics and it is because of the extended tip wheels that they will outspool a BB unit. You will also be told that what oil pressure you run through the unit can effect how it spools. Too much pressure will increase drag etc. While there is truth to those statements and the S400's do rock on 13B's some of BW's sales reps are being just a bit misleading. Just a small example of what I have had told to my customers is that a S366 is a GT35R destroyer that it will out perform the 35R. That it is the way to go. My customers question was to get a honest comparison from a BW rep. about what they offer that is comparable to the 35R. That is what he was told. So how honest a comparison is it? It's not, and anyone who knows turbos would know it's not. A 66mm inducer versus 61mm for starters as well as a 10mm difference in exducer as well. 92.7mm versus 82mm We wont even mention T4 versus T3. It's not even close. A S300 62mm would be the better comparison. I have had testing on S400's ran side by side with 42R's on big truck apps. Same truck swapped turbo. The powerband was nice with the S400 it made power in some areas better than the 42R. But it did not "outspool" it. The 42R had better transient response and was quicker on boost. Now maybe if we wanted to run water for oil it would have been a different story. But that is what was observed with same motor same setup different turbo.

Please before anyone wants to post about me bashing BW units I am not, I think they are great performers. I SELL THEM AS WELL. I think they offer much broader selection of wheels to play with and can get a more "perfect fit" if you will. I even think they have slightly better compressor aerodynamics. I just think there are too many people(BW reps) running around saying extended tip BW units outspool BB GT units. And between me and my main supplier (who has done more testing than anyone on this board) we have yet to see it on many different apps. when actually comparing as close to apples to apples as you can. Now slapping extended tip wheels on BB CHRA's is a great thing indeed and I know a few who have accomplished it. Personally I like the S400 with the 72mm comp. and 95mm turbine. Seen good stuff done with that if memory serves although the 87mm turbine might be a better solution dimensionally. I also would say run the T6 if you can. I have had great success with T6 manifolds running 2" diameter primaries.

 

The BW units have just dropped in price. There is a new turbine housing that was just released (taken over a year to get them going.) There are three differenct a/r's .90, 1.10, 1.25. They are almost exactly the same as the GT42R turbine housing, so for the most part they will be drop ins for any setup for the GT42.

There is only one choice for the turbine wheel though. They only fit the 83mm turbine wheel right now.

 

I agree on the S362 compared to the GT35R. I know some one tha had a GT35R on an SRT4 and then switched to the S366. IT did not work out. Too laggy compared to the GT35R. He switched it out for the S362 and it all came back. The BW unit spooled within 200rpms of the GT35R, but the BW unit held boost (40psi) all the way to the 8k rpm redline where the GT35R's boost would drop off. This allowed the car to make more power at redline. (I can't remember how much I will see if I can get the dyno)

The GT35R had an .82 a/r undivided turbine housing and the S362 had a .85 divided. This was on a cast log style undivided manifold.

The BW had 18degree cooler intake temps compared to the GT35R.

 

Wonder how much meat is on the housing?? They may only want to fit the 83 on there


I like the wheel of the 62mm S300 we've been playing around with fitting them on the BB units. I think they tend to flow a bit better.

 

I got mine for 600 bucks, spent like 50 bucks on tubing for the manifold, 60 on flanges and came up with this...





Its for a 12A turbo alcohol setup, my boy has this same setup but on a 13B turbo alcohol and ran 8.30 on a good tune, its better than paying 1500 bucks for a gt42R and it'll yield the same power if not more.

 

I am sure they can be punched out for larger turbine wheels, but they are coming in all ready cut for the 83mm wheel, because this setup was meant for the SFWD NHRA class which as far as I know you can only run an 83mm turbine wheel.

 

The guys I deal with can go alot larger then 83mm. They have an 85, 87, 89 and 90mm turbine wheel option now. Plus they also have a new race cover that is .96A/R versus those smaller .63 and .66A/R covers that are posted. They are gaining 100hp at peak power.

 

I 've run the .96 A/r comp here on a 13B, I like it.

 

would you happen to have any dyno graphs or dyno #'s you can share from the "stock" s475/t6 turbo ?

I looked around but haven't been able to find any.

 

Cool. Are you buying them from forcedinductions.com?? The covers are made in-house but I know several dealers are now buying them. I am thinking about trying one on my setup.