Turbo upgrade, which one.

[jack's lack]

YES

I can't wait to find out what this does. I am still on the fence teetering between twin turbos or a decent sized hybrid VNT.
I think twins would definitely draw more attention at car shows. MKIV kids, and gasser kids wouldn't even notice a clever vane control setup on an IDI diesel , but they would certainly snap a pic or ten of that monster Holset and all that piping. I'm all for form follows function, but you have to admit it's twice as cool to double spool

Keep up the good work, and please keep posting pics. You are certainly braver than I am. 

Cheers

[RadoTD]

Wow, that looks awesome! I'll definitely be watching this..

[RabbitJockey]

looks awesome, great work, i am curious how the k14 will do, and how the hx30 will do its a turbo i've been wanting to run for a while

[bugnut]

Thanks for the compliments on the build.  I know the welds look like crap but hey, we all have to start at some time or another. 

The hx35 is too big. nuff said. I have one on my table. It's too big even for a heavily ported, fueled up 1.9. Glad you went with the 30. VERY nice work. I'm envious.
How did you get involved with the diesel dubs? Usually people dont start insanity of this caliber until they've had a few years with the moderately sane debauchery that IS IDI VWs

This hx30 is still big.  There is no way I could fit that 35 in the rabbit.  right now I had to tilt the hx30 to clear my shifter and some of the frame.  I might end up cutting some of the frame for the air inlet. If I do I will box it up and make it stronger than factory. 
 As for diesel and performance I can't leave anything stock.  It all started with a few mods here and there and now look at it.  I have done the same with my dodge diesel's.  I had my 02 at 550hp and my 93 has the pump mods while the 07 just has a dpf delete, it has plenty of power for now.   What really got me started was my vw ghia and bug.  The aircooled engines are so nice to work on.  Want a bigger bore, no problem buy some new jugs and there you have it. I am alsot working on my bug right now.  The engine is now a 2387 fuel injection turbo monster. Should be in the 400hp mark.

looks awesome, great work, i am curious how the k14 will do, and how the hx30 will do its a turbo i've been wanting to run for a while

I am wondering too how this k14 will do.  I do have a 45mm gate I am adding to this build.  That should take care of the k14 not over spooling before the hx30 kicks in.  I guess we'll see when the tires hit the road. 

[Smokey Eddy]

My T3 is too small, time for a bigger one. I can peg my pyro gauge right now with the T3 while boost is at 30psi. That is with water injection.

Do you have an intercooler? This happened to me also very quickly. I added an intercooler and limited the t3 to 18 pounds. much lower egts and more torque. lower top end though but that may be due to other changes too like timing and what not.
the t3 will start to work against you once you go past it's efficiency range. Keep this in mind with your twin set up now but your numbers look dead on! i'm stoked to see that all working together.

[bugnut]

I do have it intercooled.  I tried turning the boost down to 25psi and it was still way to hot and a lot of black smoke.  So I figured I needed more air to burn the fuel.  This hx30 should do the job while the k14 will help with the low end.  I would have done more testing on pressure but that is when I bent the rod.  I am thinking what bent the rod was 3 things.  My water injection, i just changed to a larger jet. I bumped the timing up and hear it ratting on the top end and the intake design.  I think all the water was being put into #1 cylinder.  That is the rod that got bent.  So I am going to make a new intake plenum. 

[bugnut]

i am concerned about that too.  I did read that you can have up to 15* tilt from perpendicular.  A rough look at the hx30 it is in the ballpark of 13*.  I need to get my level on it, I just put a protractor on it real quick. 

Every spot I put the turbo it would hit something that is untill I tilted it.  Then it would clear the shifter and I can get a hose on for the intake. 

[truckinwagen]

There are lots of OEM applications where the turbo is tilted like  that. The TD Isuzu p'up had a turbo tilted like that. And lots of turbo jimmies in trucks have them leaning like that to fit the monster turbos under the hood.

I would not worry until it actually leaks. My money is on it running without issue.

[gldgti]

Yes, logically, if you have 50+psi of oil pressure in the bearing housing, whether the thing is tilted forwards or back with respect to gravity likely wont make any difference while its running. Its likely fairly important that on shutdown most of the oil can drain our of the housing (eventually), or it will seep past the seal on one side.

[RabbitJockey]

i wouldn't worry about the tilting, i have seen some titled much further, there was a guy on vortex with a stock long block aba in a rabbit making 380whp on ethanol his turbo was really slanted i think he said you could go 30 degrees, that sounds like alot tho haha

what i really wonder tho is if the k14 will end up being a bottle neck more than a torque maker, and if you'd be better off with the hx30 by it self,  time will tell

[RabbitJockey]

http://forums.vwvortex.com/showthread.php?4829923-The-super-slappy-attack-rabbit.&highlight=400whp


heres the thread i was talking about, its quite odd to see a stock 8v make that much power damn

[bugnut]

That was a good read on that build up.  That turbo has way more tilt than I got and looks like it worked.  Looks like I can give it a try.  As for the k14 being a bottle neck I would say it sure does look like it.  I hope it's not but time will tell.  If it is I will try swaping out the k14 for the t3 and see what that does.  I am almost done with the rest of the porting.  Just have a little more on the exhaust to do.  After that I will get the valve ground put the head back together.  Once I get this thing running there will be snow on the ground. 

[rabbitman]

My guess is as long as the drain is lower than the seal it will probably be fine.

[gldgti]

The shaft seals are not under any oil pressure at all.  The oil is fed to the bearings and once it leaks around the bearings it is under zero pressure.  The seals are on the zero pressure side and if under any pressure (e.g. poor drainage) will leak profusely.  If oil pools enough to reach the shaft seals even if it is not under any pressure other than gravity, they will also leak quite well.  That angle may not be enough to do so.  As I said, just a curiosity. 

quite right, whoopsy.

[RabbitJockey]

hillfolk told me a friend of his tried compounding a 1.6 t3 with a merc t3 and that the boost came on very very fast.  i really wonder how the holset would do on its own