um im thinkin yes to this

[therabbittree]

well i don't know which of ya is being sarcastic but this turbo pulls the top end on a tdi m very well..if i can source a 6cm turbine housing it should be much better..as asingle turbo..as a big one for a set of twins  i think it would work great....
later
deo
\x/ hillfolk!

[DVST8R]

You could always do like what Andy was looking at, puting the Turbine hosing from the Hx-30 on to your Hy-35. It would be ruffly a 6cm housing.

[935racer]

Hey deo you figure out roughly what rpm you are making how much boost? Also you got any pics or 1/4 times yet? What pump are you running?

[935racer]

Hey anyone with some computer skills wanna lay a to4e50 compressor map over that hy35 one?
The to4e50



Pic stolen from vwmike

[QuickTD]

well i don't know which of ya is being sarcastic but this turbo pulls the top end on a tdi m very well..

No doubt, the thing that concerns me would be making 30 psi with it down low in the rev range. According to the map, the airflow through the compressor would be insufficient at low engine speed and you might experience compressor stall or "surge". The smaller turbine housing might spool it soon enough to allow that to happen. An electronic boost controller might be your friend, they can control boost levels as a function of rpm, might help you keep it together...

[A2TD]

Wow the efficiency on this turbo is horrible

Dont you mean fantastic? The 79% peak efficeincy island is small, but the 77% island is huge, far better than anything from garret. Size might be an issue though, as long as it doesn't make much boost before 6000rpm it should be OK...

Plot the 1.9tdi on that map and you'll see how inefficient it is. I was referring to its implementation on a tdi, not to the turbo itself.

[therabbittree]

yeah i can take some pics and post em.. my pump is a cummins 4bt pump with a vw throttlke shaft and gov...i have the 260 kerma race nozzles...any how i have a tach but its not hooked right or adjusted right.. i totally disabled the waste gate so it acts like a buig turbine etc...fuel controls the boost.....i would say 3000 rpm or so to start maybe from the fellof it i mean its how you drive it if you have no load and drive easy through the gears you will see no boost even cruising 65 - 75 mph...if you guive it fuel it will spool in 2 secs or so at cruising speed its FAST as all heck on the highway when you spool it i mean 65 to 85 90 in a blink ..if you ever have driving a big truck pre accert it drives like that ie no boost till you wnat it and it sounds sick you can hear teh turbo whistleing before it sbuild  boost and starts doing the jet engine noise its cool to hear th eturbo with no load and no boost just a little fuel and it makes a nice sound... i think if i keep it with the big single i will try to do a smaller turbine ..is the hy available with a smaller housing then the 9cm or do i have to mdify thta hx30 turbine to use on a hy and what has to be modded?.... or i will build aset of twins like a always wanted..and last idea was to use one of my m90 eatons for the low end..it would sound sick ..too not sure what to do..im doing my trans some with 367 r&p, quife, bolt kit, 80% cv cup springs, metal spherical ball linkage, and a wide ratio td trans,  4 puck and a beefy pressure plate...it should be nice them  of course i have the water inj and a intercooler to do..also my cut pistons aand possible cam i want to try ...
i will grab some pics soon thanks
Deo

[therabbittree]

oh the 1/4 mile times sucked 15.8 through 16.02 with clucth smoke coming up through the floor .. blake was running 14.5...and he is lighter has better rings etc and water inj..i hope the other stuff i get going gets it in teh 13s ..heck blake ran a 14.02 or so almost  a13 back in cleveland..later
Deo

[Benjamin]

also my cut pistons

why using shorter/other pistons?

heck blake his time, 14,02 is fast  

Greetz, Benjamin

[therabbittree]

pistons are cut to allow higher valve lift and to reduce compression...
thanks
deo

[hillfolk'r]

14.07 was with the old garrett
the best i got with this kkk is like a 14.2
i dialed it back (yes i lowered it) to 30 psi or so  :shock:  :shock: i didnt wanna nuke another turbo for waterfest,plus it was scorching hot,like 90 deg.f.
my best there was my first run in the mornin,a 14.47,but i had 2 or maybe 3   14.59's during the day,traction stunk,i was hookin up better on the drive home  werent we  deo???


hey can i grab a 3.67 from another tranny to put in my 7a box??
i can get one(s) from old boxes probably , from my "manifold guy" :twisted:  :twisted:
oh yea, this is cause now im worried about the diff. rivits,and while im there ill do a 3.67 swap

deo i wonder how mine will run,ya know how we seem to "fuel" differently??
i guess  ill find out

[therabbittree]

as fro the gear swap yes you can you just have to watch teh 9a or 367 ring and pinion shaft..it may be bigger i have to find mine and figure it out..as some part is bigger or one of teh bearings etc..check out that broke vw site ./.it explains soem differnaces.. phew up late working on teh kubota sucks im tired nite y'all
Deo

[hillfolk'r]

yea i went there,thas a cool site,yea seems like something about the  pinion shaft is bigger and stuff
from that site if i remember right,it may make 4th gears an issue or something

[hillfolk'r]

um, at work the other day,i was playing around with a couple of 4b cummins engines
and i noticed the turbos had a very small exhaust housing
ill have to look again to see the tag on the turbo for the important info
but i wonder if one of these housings would work on  my hy 35,hmmm
maybe i have to mod it like that hx 30 housing you guys are talking about

[DVST8R]

The turbo on the 4B is the HX-30  :wink: