1.6TD k24 or T3 on AHU?

[the4ork]

I've also considered a vnt-15 with a 50trim wheel and compressor. That would be quite nice. Otherwise you can order an off the shelf turbo metics 50trim T3 and get it with a stage1-5 .36 or .48 hot side.

[CrazyAndy]

I've also considered a vnt-15 with a 50trim wheel and compressor. That would be quite nice. Otherwise you can order an off the shelf turbo metics 50trim T3 and get it with a stage1-5 .36 or .48 hot side.

Sounds cool; do you know the A/R of the VW T3 off the top of your head?

[8v-of-fury]

38?

[RabbitJockey]

.36  vnt15 hotside is probably too small for 50 trim cold

[CrazyAndy]

.36  vnt15 hotside is probably too small for 50 trim cold

That's kind of what I was thinking as well; might be efficient, but that doesn't matter when you've got that big of a trim cold side hanging off there pushing that much air.  That would make the turbine the limiting factor.  What would avnt15's A/R be anyway?

What about a vnt17?  They're big enough to hybrid with a vnt22 cold side, you think it would  handle a 50 trim?  IF not, than would a 45 trim compressor be better on the 15?

[8v-of-fury]

The 17/22 hybrid will do 200+ whp and 320+ wtq all day long on a 1.9 ALH.....

[the4ork]

i doubt the .36 hotside is that limiting. the 1.8t k03 hotside has got to be about that size or smaller, and it pushes 180hp at 7k+ rpm with 5v per cyl!

[RabbitJockey]

.36  vnt15 hotside is probably too small for 50 trim cold

That's kind of what I was thinking as well; might be efficient, but that doesn't matter when you've got that big of a trim cold side hanging off there pushing that much air.  That would make the turbine the limiting factor.  What would avnt15's A/R be anyway?

What about a vnt17?  They're big enough to hybrid with a vnt22 cold side, you think it would  handle a 50 trim?  IF not, than would a 45 trim compressor be better on the 15?

I don't know the ar of any vnt stuff and its not really comparable anyway cause they're different families of turbo. If what 8v says is true then it would work a vnt17 but I'd do the 22/17 first

[RabbitJockey]

i doubt the .36 hotside is that limiting. the 1.8t k03 hotside has got to be about that size or smaller, and it pushes 180hp at 7k+ rpm with 5v per cyl!

I agree the only thing ***ty about it is the ancient turbine wheel. But otherwise in gas applications its said to be good for 230 crank hp

[8v-of-fury]

[libbydiesel]

The vnt15 and vnt17 have the exact same hot side.  The compressor size is different.  The turbine shaft of the 17 is stronger and consequently heavier - vnt15 shaft is cut down between the journal bearings presumably to reduce inertia.

[RabbitJockey]

The vnt15 and vnt17 have the exact same hot side.  The compressor size is different.  The turbine shaft of the 17 is stronger and consequently heavier - vnt15 shaft is cut down between the journal bearings presumably to reduce inertia.

Interesting!

[the4ork]

i doubt the .36 hotside is that limiting. the 1.8t k03 hotside has got to be about that size or smaller, and it pushes 180hp at 7k+ rpm with 5v per cyl!

after some searching, a k03 hotside is .36A/R, and i presume the turbine wheel is about as restricting as that of a t3.

but bear in mind you can get different stages of T3 wheels. if you find yourself at a limiting factor (after extensive dyno testing) you will be able to sacrifice a small amount of spool and go up on the stage of the turbine wheel. T3's come in stage 1 (stock) through 5 (more flow).

if it were me, and my goal was over 200 hp at the crank, i'd probably go with a stage 3 .36 a/r hotside, or if my goal is a daily driver id go .36 stage1