What is the correct answer?

Compressor nut BW S300  

Compressor nut BW S400  

This should be fun to see, .....but is that the right answer?

I'm old school, show me proof.

I was asked this & can't find a definite answer. 

You'll have to get a service manual for a Borg Warner turbo. I know we don't have it. I'm pretty sure I kept the service manual for the HX35W service manual. 

Why is it such a simple question with such a complicated answer. I see nobody here wants to touch it neither.

Hoping that DAP will shed some light. Seen way to many different answers. Anywhere from torque values, to finger tight on nut until contact with the wheel plus 90 degrees.

Has anybody here rebuilt an S300 or S400 Borg. If so, what did you torque the nut to? 

(dripley) did you leave the gate open? I'm seeing a lot of chickens here.

When I get a definite answer, I have a race cover, billet wheel, rebuild kit with 360 thrust, 1.10 exhaust housing, 87 x 82 turbine wheel for my S475 x 83 x 1.25, plus a 76 x 68 turbine wheel & 12cm gated housing for my billet S362 x 65 x 14 that I would like to install. My 53 block is cracked of course, but I plan on ripping it in half before I change it to the Mexican. This should just about do it & have fun getting there. Now that it's warmer, water is cheaper than anti-freeze, so let her leak!

Never rebuilt a Borg Warner turbo. 

 

Holset use to have a download of PDF documents no longer on the Holset website. 

 

BorgWarner doesn't even acknowledge the turbo. Just the company profile.

Me and the chickens know nothing about it either.

The books are easy to find, the data sheet on the torque limits are not as easy.

 

Im sure you can get it from them with a simple request.

North America

BorgWarner Turbo Systems
3800 Automation Avenue
Auburn Hills, MI 48326
USA 

BorgWarner Turbo Systems
PO Box 15075
Asheville, NC 28813
USA 
Phone: +1 828 684 4000
Fax: +1 828 684 4030
E-mail: info-na@borgwarner.com

Aftermarket USA/Canada/Mexico/Middle America

Phone: +1 828 684 4027
Fax: +1 828 684 4030
US Phone: 800-787-6464
US Fax: 800-424-6464

 

S300.pdf

 

S400.pdf

 

S2A.pdf

 

S2B.pdf

 

The S300'S are 15 foot lbs.

The S400'S are 28 foot lbs.

These are supposed to be gospel. This is from a rep turbo company in Calgary.  

These guy's built a lot of turbos http://www.northamericanturbo.com/ they may give you 

Alright then, all the above parts are installed. Needed more room so I removed the fender for standing room. This is whats left after the update. Did a little something to the valve cover seeing I had 2. The compressor race cover is 5 1/2", so I had to update the intake with a 5" x 5 1/2" silicone bushing & 5 1/2" 45* degree elbow. Replaced valve seals with top hat & set valves to 8 & 16. Also needed a exhaust flange to go from 4.62" to 4" because of the 87 turbine wheel & the 1.10 race housing & last, an adapter to go from the he351 12cm turbine housing to my hx40 hotpipe.