Compound turbos on a 1.9td

[jimbobpolo]

So, am I best ditching the k14 and going with the k24 as the HP turbo and using something else as a LP turbo? I have a holset hw1e buried in my garage and a mate that's selling a hx35 with a 9cm exh housing, both maybe too big for it I think.

[Alcaid]

K24 spools way too slow to be used as a HP turbo. Better then to use a single turbo that spools quicker and supports your power goals. Those Holsets are way too big period!

A Holset HE211W will give you full boost by 2500rpm and support at least 170whp (dyno proven). A perfect single turbo for your goals!

[jimbobpolo]

I'd prob go that route if I wanted a big single,
I've just been offered a Garrett t04e turbo, it's off a gasser. Not sure if it's any good for my plans?

[jimbobpolo]

[RabbitJockey]

Do you know the trim of the compressor and ar of the exhaust side? Probably too big also tho, most to4es are just a hair smaller than holset hx35

[jimbobpolo]

It's .50 a/r comp and .68 a/r turbine. It's quite a lot smaller than the hx35 I've got.
I got the t04e for free so I'd be silly not to give it a go..

[RabbitJockey]

It's .50 a/r comp and .68 a/r turbine. It's quite a lot smaller than the hx35 I've got.
I got the t04e for free so I'd be silly not to give it a go..

.50 ar is not the trim, the physical size of the turbo doesn't really mean all that much, also the exhaust side u sure it's not .63?  It can't hurt to try it tho like u said.  Of its a smaller to4e I think 43 trim it might work alright, but to4es are more geared towards 200+hp. Let us know what u end up with cause compounds are cool!

[jimbobpolo]

Ah sorry didn't read your reply properly! Comp trim is 48.9 and turbine is 63.9, it's smaller in comp and turbine wheels than my hx35 by quite a long way,
I've got my polo booked in for a power run at my local dyno tomorrow afternoon so it will be interesting to see what it's making currently with the k14 should be good for comparisons

[nathantheengineer]

Keep us posted!!

[jimbobpolo]

Just back from my RR power run, I had guessed around the 110 to 120bhp mark for my 1.9 aaz, I wasn't far off but pleasantly suprised with the figure I got







This run was at 24psi on the pug Kkk k14 turbo I'm running
First run was 127.7 bhp and 185ftlb at the flywheel

[R.O.R-2.0]

thats not a T4..

its a T3..

[Blocksmith]

Not to sound like a jerk or anything--I'm just wondering how you knew that it's a T3 vs a T4, just looking at it? How does one know based on just the outward appearance?

[RabbitJockey]

I would agree with him it's probably a t3 just by how the housing looks and the size of it compared to the keys, and the size of the compressor housing vs the size of the turbine housing makes it look more t3 sized.  And it's a 50a/r housing which I think was a Saab part but I'm not 100% on that.  Depending on which t3 it is it could work for you

[Alcaid]

What was the numbers at the wheels?

[R.O.R-2.0]

Not to sound like a jerk or anything--I'm just wondering how you knew that it's a T3 vs a T4, just looking at it? How does one know based on just the outward appearance?

because ive owned that EXACT TURBO.. its a T3.. the exhaust outlet flange is the DEAD GIVEAWAY..

a T4 is HUGE compared to a T3.. and i dont know of a .50 aspect ratio T4 either..

lemme snap you a pic of the size difference..

brb..

OMFG.. is that an EBAY TURBO?!?! it sure looks like one..

its going to EXPLODE if you try and run it!

sure looks like it says "TURBOCHARGER" on the number pad on the intake scroll...