Pretty sure the 475/83 has a 74mm exducer and the xt80 has a 77mm. That said, I still would go with the Borg.

 

I would say 2:1 or better on the 5.3l and close to 1.8:1 on a 4.8l. This is purely speculation though.

The last 5.3l I logged BP on was with a TC unit and a 68mm turbine and it was ugly! 15psi in the intake was 50 before the turbine. Talk about some serious EGR!

 

Preach on bro. Tj... lol

All the bullshit thats out there about how big turbos wont spool etc etc is so freakin difficult to overcome....

And btw... when ya gonna return my phone call? Lol

 

WOW!

Some how that doesn't surprise me, but just hearing that figure blows my mind!

 

I believe the Borg actually has a 74mm turbine in typical nomenclature. The turbine outlet is 4"

 

When did you call? my cell or work? I do not answer my cell when I do not have the number stored. Shoot me your number or call again.

 

First of all:

BW S475/83: 83mm inducer/75mm exducer

Magnum: 88.9mm inducer/77.4mm exducer

Second of all CX racing makes the exact same turbo for half the price. Plus, at CX racing you have the option to get that turbo with a 76mm compressor! I just bought one lol! I'm not shittin you, it looks like they took magnums turbo and ground all the part numbers and logos off of it lol.

http://www.cxracing.com/mm5/merchant...ry_Code=TRBT35

Here's mine next to a TC 76/68 (notice the spots on the housings where they ground something off)

 

I see, I would call the Magnum a 89mm turbine just to keep the lingo consistent with every one. Although bigger does not always flow better too.

 

That CXRacing unit is a BB turbo also... I was eyeing their 80mm unit for my 6.0 but the turbine and obviously being chinese had me worried vs the S475 or S480 with large turbines on a T6.

 

The borg has a bigger TW, so it would be better for more all out power.

But, if you are building a street truck than the magnum would be a great choice. Plus the magnum has our 1 year warranty as well.

Don't get me wrong though the s400 style turbos are great but the magnum will most definitely spool up faster.

A larger TW is a necessity at a certain cubic inch/hp goal you need to decide what exactly you want from the motor.

Call me and we can discuss your options.

Thanks,

Rob

 

750-800 hp as in wheel horsepower?

 

Does the cxracing xt80 have a 3.5 downpipe or 4.0?

 

The bw 83mm turbine is measured at the inducer, not exducer. If it was measured like pretty much every other company it would be either a 74 or 75mm turbine. The bw does not have a larger turbine than the magnum.

 

4" vband flange for the down pipe
3.5" vband for the compressor outlet.

 

You can see the indications of high heat on the flange. On the xt80 nick put on his truck you can see where the holes for the t5 flange were welded and re-drilled for a t4 flange. Make sure you take the exhaust housing off, clean it out, and check and ensure the flange is true/straight.

that turbo comes to life very fast on a tu1 cammed 5.3

 

^^ haha then the xt80 is perfect for me since i have a cammed tu1 5.3

 

So this is not correct then?

What are the turbine exducer diameters on the BW 87 and 92mm turbine wheels?

 

Remember, BW rates their turbines on the inducer not the exducer like most other companies. The BW 83mm turbine actually has a 75mm exducer iirc. I m running the cxracing version of the xt80 and I can tell you it is literally the same turbo except the turbine housing is different. It is 1.15 ar. It is around $600 from cxracing and it is an absolute beast on my 5.3 truck

 

That's why I was wondering what the exducer diameters were on those two BW turbine wheels. I figured someone would know that stuff off the top of his head. Time to start Googling! Lol

 

Just saw Ren's post. We just swapped my old on3 out for this cxracing 80 and it is a beast. Like he said, it comes to life real quick with my TU1 5.3. With the old turbo my IDC was at 57% at 14.3psi, with the new turbo my IDC is a 67-68% at 12 psi lol. So it is moving some air! The downpipe flange is a regular 4" v-band and the compressor outlet is 3.5" v-band. I also knife edged the divider on the turbine housing.