compound k03/T3

[chrisg]

i've been reading for houuuurs and educating myself on the setups, but i can't find out, has anyone successfully compounded a k03 on the manifold and a T3 under it?

[R.O.R-2.0]

K03 might be too small of a small turbo.. they are a restriction to the exhaust, at anything over 2500 RPMs or something like that..

they are just too small.

[theman53]

410 just did a compound setup in the TDI section. I think he used the k14 and k24.

[410]

410 just did a compound setup in the TDI section. I think he used the k14 and k24.

Actually I used the stock k03 and a k24 which is as close to a t3 as it gets.  If you want zero turbo lag, crazy stupid bottom end torque and don't plan on pushing more than 150 hp, than this is the way to go.  The trick to reducing exhaust back pressure with the k03 is to port out the exhaust side and open up the wastegate port a little.  Also make sure the wastegate is adjusted so that it can open as much as possible.  This setup is great for a budget build but I think I'll try bigger turbos next time around.

I might try using a k24 or a t3 for the small turbo and something bigger than that for the bigger one next time around for a real high horsepower build.

[libbydiesel]

If you can keep the K03 from being a bottleneck, then I would think that compounded with a K24 or T3 would be SWEET.

[theman53]

I am not a fan of the instant boost. I would like a "little" lag. The ALH I have with the vnt is full boost probably by 1700rpm. In slick/snowy conditions it really sucks. I little boost by 2,000 isn't bad, but full pull isn't my cup of tea. If the K24 I had on the 1.6 would have started to spool just a couple hundred rpm faster than what it did I think it would have been perfect for me. Maybe in my case a smaller IC?

Just glad guys hear are trying it to see what can be done.

[410]

I am not a fan of the instant boost. I would like a "little" lag. The ALH I have with the vnt is full boost probably by 1700rpm. In slick/snowy conditions it really sucks. I little boost by 2,000 isn't bad, but full pull isn't my cup of tea. If the K24 I had on the 1.6 would have started to spool just a couple hundred rpm faster than what it did I think it would have been perfect for me. Maybe in my case a smaller IC?

Just glad guys hear are trying it to see what can be done.

Sounds like you need to install that gt2256 turbo on your new jetta.   It would give you the lag your looking for plus crazy top end.  Do you think the wife would notice?

[theman53]

I don't want to touch the newer jetta. I just want it to be as reliable as possible. Maybe if the 86 was up and reliable as well, but until then I plan on keeping the 01 as stock as it is now with the no name stage 1 tune and .205 nozzles.

[R.O.R-2.0]

I am not a fan of the instant boost. I would like a "little" lag. The ALH I have with the vnt is full boost probably by 1700rpm. In slick/snowy conditions it really sucks. I little boost by 2,000 isn't bad, but full pull isn't my cup of tea. If the K24 I had on the 1.6 would have started to spool just a couple hundred rpm faster than what it did I think it would have been perfect for me. Maybe in my case a smaller IC?

Just glad guys hear are trying it to see what can be done.

my K24 spools GREAT.. but i dont have my wastegate hooked up..

it spools LOWER than my VNT did.. it makes a good amount of boost before 2000, whereas my VNT would just start coming alive..

the VNT had a much nicer top end power band tho.. i really miss it now that its gone.

[libbydiesel]

ROR, in order to prevent misinterpretation, you should include that you are dangerously over-fueled and that your VNT did not have functional vanes and they were stuck fully open. 

[Toby]

Dangerously overfueled? I like the sound of that!

ROR: What happened to the VNT?

[R.O.R-2.0]

ROR, in order to prevent misinterpretation, you should include that you are dangerously over-fueled and that your VNT did not have functional vanes and they were stuck fully open. 

how are you one to judge that i am DANGEROUSLY over fueled? been riding around in my car lately, without me knowing?

seriously tho, what leads you to believe i have too much fuel? i have a stock 9mm pump, and its not even turned up all the way..

[libbydiesel]

ROR, don't get your panties in a bunch.  Your input is appreciated and I'm not meaning to criticize.  I haven't ridden in your car, and as far as being over-fueled, I'm just taking your word for it.  You have said it yourself in several other threads.  Such as:

i have a CRANKED UP PUMP.. it pours coals with or without the LDA hooked up.

the collar on the fuel screw, its gone, and the fuel screw is threaded in like 3 full turns past the collar..

If you are "blowing coals" and your max fuel is THREE TURNS ABOVE STOCK, I GUARANTEE EGTs are way above 1500°F.  Probably over 2000°.  That is dangerously over-fueled.  A stock pump EASILY has the capacity to dump enough fuel to melt the pistons well prior to being 'turned up all the way'.

With properly functioning vanes, a VNT15 will produce boost waaaaaaaaayyyyyyyyyyyyy faster than a k24 AND still flow better at higher rpms.

I'm just saying when you pop into a thread and say that the K24 spools faster than a VNT15 or that the VNT15 has better top end, without qualifying your specific and fairly idiosyncratic situation, you are potentially misleading folks who aren't experienced with those turbos.

[R.O.R-2.0]

ROR, don't get your panties in a bunch.  Your input is appreciated and I'm not meaning to criticize.  I haven't ridden in your car, and as far as being over-fueled, I'm just taking your word for it.  You have said it yourself in several other threads.  Such as:

i have a CRANKED UP PUMP.. it pours coals with or without the LDA hooked up.

the collar on the fuel screw, its gone, and the fuel screw is threaded in like 3 full turns past the collar..

If you are "blowing coals" and your max fuel is THREE TURNS ABOVE STOCK, I GUARANTEE EGTs are way above 1500°F.  Probably over 2000°.  That is dangerously over-fueled.  A stock pump EASILY has the capacity to dump enough fuel to melt the pistons well prior to being 'turned up all the way'.

With properly functioning vanes, a VNT15 will produce boost waaaaaaaaayyyyyyyyyyyyy faster than a k24 AND still flow better at higher rpms.

I'm just saying when you pop into a thread and say that the K24 spools faster than a VNT15 or that the VNT15 has better top end, without qualifying your specific and fairly idiosyncratic situation, you are potentially misleading folks who aren't experienced with those turbos.

it never poured coals with the VNT.. it only started pouring coals with the K24..

and the spool thing, ill give you that.. but the VNT having more top end than the K24, that still makes sense to me, because @ WOT, the vanes on a VNT better be wide-assed open, otherwise your VNTs gonna be exiting stage left..

anyways, i still dont think im DANGEROUSLY overfueled.. i think i would have burnt an engine down by now..

i will hand it to you, i am over fueled, but i dont think to the degree you assume..

[410]

So back to the original topic, k03 with a t3 will work very well together.  I have a few drives on my k03, k24 build and I'm very happy.  Boost builds very quickly and pulls hard as high as the engine wants to rev.  I'm running 26 psi but it wants to climb much higher.  This setup can run 30 psi all day long.