anyone using a Holset HX-35 from a 94-02 Dodge Ram Diesel?

[SupraDupra500]

^Yup. Josh... glad to get that turbo back from you. I have a car here that its going on for more R&D.

sweet.. i'd suggest a bigger exh. housing.. EGT's creep pretty bad dont remember the numbers but they were up there.
BTW: do you want both exhaust housings back? the 5 bolt and the v-band housing? or just one? i have no use for both of them obviously..

I only have this problem on starup. Once it is up to temperature the smoke goes away. After coming off a rebuild on the engine, my initial thought was the rings had not seated or I had not put a valve seal in correctly. Then I searched some threads that Jon posted about his problem and I new it was just the turbo. I need to fix that before it gives me some problems, I dont drive the car it can wait. Hey supradupra, have you ever taken it to the track or dyno. I want to see what kind of hp and e.t. times I could expect. Well once it is finished.

No, no dyno numbers, BUT on 26psi with 110 oct race fuel, i had no traction in 1st, 2nd, or 3rd, and 4th grabbed but the Spec 3 clutch slipped as soon as the boost came back in.. (i shifted slowly) The company claims the clutch i good for 510ft lbs of torque. But no i have no numbers to back it up. Do have a kick-ass vid of me smoking a lightly modded LS1 camaro on 10psi creeping to 14! he was impressed as hell.
As for the track.. when i converted to stainless manifold and external w/g i took it to the local 1/8th mile.. and at 14psi no traction in 1st and slight spin in 2nd i ran 8.5 @ 88 or 89 mph i cant remember with 2.2 60'... horrribbbllleee..
I know with my new setup ill need DR's for the street and slicks for track, no question. (no telling Jon.. its a surprize.. )

 

[Justin727]

Good luck can't wait to see what turns out, but kiss that spec clutch goodbye

 

[Krister]

it wont let me post pics (not even an avatar)- if anyone can help out with this please pm me- lol.
anyway, ill have to remeasure the inducer again- maybe im mistaken, although i dont think i am. it came with that gi-normous exhaust housing which i notched the bolt holes to match a t4 flange. outlet is way too big- i would like a 3 or 3.5in- will 4in downpipe work in am mk3??? if anyone knows where i can get a smaller housing for this (lets say hx50) let me know asap. i think a housing like u have krister, will work good. its the only thing keeping me from using this beast.

Try hosting the pics here: www.imageshack.us and post the links.

Smaller exhaust housing should be available from Holset. I'd contact a shop that does Cummings Diesel turbos, do a search on Google. 4" dp will work, depending which manifold you are using. If the outlet on the turbo is 4", you can make a reducer to 3-3.5" if you have clearance issues with the dp.

 

[SupraDupra500]

Good luck can't wait to see what turns out, but kiss that spec clutch goodbye

I'm not going to use that clutch. Im going with a custom unit from a local transmission shop. It's going to be pretty much the same thing as South Bend clutch considering its coming from the same manufacturer
That spec is actually for sale if you know anyone interested.. PP needs turned and it needs a new disc. I can get a GREAT deal on a 6 puk feramic disc if anyone wants.

I've seen 4" exhaust on mk3's before, although I don't remember who had it. They were running a GT42 with full 4" right off the back of the turbo, which is exactly what i........nevermind..:sarcasm: Anyway, it's deff. do-able. Just getting it fabbed and having look right is the hardest part.

 

[Justin727]

O yea its do-able good luck on that it'll look great a bunch of folks have done it as you know!!!

 

[SupraDupra500]

O yea its do-able good luck on that it'll look great a bunch of folks have done it as you know!!!

Thanks, I'll start a build thread soon, but not until i get most of my parts together and machine work done. But hey, let's not jack this guy's thread. I think we've answered his question:bigthumb:.

 

[flubyux2]

mostly.

but whats this talk about not being able to bolt a wastegate directly to the MR2 adaptor? a 2-bolt 38mm WG wont bolt directly to the adaptor? i dont see how it wouldnt unless there was a physical obstruction on the hotside of the holset keeping the 38mm from seating fully. but you were saying you ran a 40mm... which is a four bolt from tial, named F40. am i to beleive your WG didnt fit because you werent using the WG intended for the MR2 adaptor?

i wonder if the 38mm will vent enough with a 14 or 16psi spring to prevent boost creep?

 

[mk3713]

There is no room for the wastegate beetween the manifold and the turbo. Also how the flange is rotated on the mr2 adapter makes it very difficult or maybe impossible to run a dumptube off of the wg. I tried to do a mockup with a 38mm but I couldnt seem to find a way for the wg to fit, the downpipe interfered, the manfold interfered and then I couldnt figure out how to fit a dumptube when the wg points only to either te manifold or the downpipe. For me it was easier to put a tube that rises to where I need it, I hadnt bought my wg yet so I bought a 40mm....I was afraid of boost creep.


Long story short. Manifold interfered downpipe interfered wg pointed in two directions only, manifold side or tubo side. No way to weld a dumptube or recirculating tube. Trust me if it was just easy enough to bolt a 38mm wg and thats it I woulnt have bother welding and fitting a larger one.

 

[Zazzn]

i've got a 4" exhaust on my mk3.

That HX55 sounds intresting, when you guys talk about spool are you talking turbo threshold or are you just saying posivite boost at that rpm.

I want a turbo thats FULLY spooled (turbo threshold) by 4k.

Thats where the street fun begins.

 

[Krister]

i've got a 4" exhaust on my mk3.

That HX55 sounds intresting, when you guys talk about spool are you talking turbo threshold or are you just saying posivite boost at that rpm.

I want a turbo thats FULLY spooled (turbo threshold) by 4k.

Thats where the street fun begins.

You can check my dyno curve, I posted it on the 2nd page. I have around 1 bar/15psi at 3800rpm and positive boost at 2000-2500rpm (hard to tell in an automatic because of kickdown).

 

[flubyux2]

There is no room for the wastegate beetween the manifold and the turbo. Also how the flange is rotated on the mr2 adapter makes it very difficult or maybe impossible to run a dumptube off of the wg. I tried to do a mockup with a 38mm but I couldnt seem to find a way for the wg to fit, the downpipe interfered, the manfold interfered and then I couldnt figure out how to fit a dumptube when the wg points only to either te manifold or the downpipe. For me it was easier to put a tube that rises to where I need it, I hadnt bought my wg yet so I bought a 40mm....I was afraid of boost creep.


Long story short. Manifold interfered downpipe interfered wg pointed in two directions only, manifold side or tubo side. No way to weld a dumptube or recirculating tube. Trust me if it was just easy enough to bolt a 38mm wg and thats it I woulnt have bother welding and fitting a larger one.

so, w/ the stock manifold and the MR2 adaptor, the WG flange means the dump is either pointed at the strut tower or the engine block right? was there no room for the dump tube flange and tube when pointed down? that sucks...
i have a guy who does a great job at brazing. perhaps i could grind a step into the MR2 adaptor, and insert a tube w/ another flange on it to rotate the WG position 90* so the dump points to the firewall. you think you could have gotten it to work if you had done that?

 

[mk3713]

No room downpipe gets in the way. Dump is pointed at the downpipe or the manifold. It could work to rotate the wg but it would be difficult to run a dumptube and downpipe because of the wg. I dint realize how big a external wg was untill I had one in hand.

 

[flubyux2]

true... im just picturing the 38mm. but the larger F40's, V44's, HKS50's and Especially the GReddy Type-C can get big and cumbersome. hell, the old turbonetics race gates and delta gates are bulky too.

would it have been easier to recirculate the WG dump? i really dont like venting WG's...

 

[mk3713]

would it have been easier to recirculate the WG dump? i really dont like venting WG's...

Actually, where I placed my wg it made it pretty easy to position the recirculating tube. I ended up positioning it where the engine lift hook is clocked towards the downpipe. Just got a ss plumbing tube<long 90> and cut it to where I needed and placed it where I needed.

 

[flubyux2]

oh wow, cool. do you have any pics of that? id like to see how that looked.

oh, and i think i figured out why these turbos will creep and spike so badly; only one of the 2 volutes are vented. thats why i have such horrible boost control problems on my truck. only the rear 3 cylinders are vented by the WG since the manifold on the Cummins is completely divided. the front 3 cylinders still have enough energy (With added fuel) to keep increasing shaft speeds. so with my mild setup, thats why im pegging my 30psi boost guage.

i think if the turbo had dual ports like the MR2 CT26 to vent both volutes of the turbine, itd control boost better. but i think a single wg like a 38mm venting all 6 cyl before they enter the turbo ought to be sufficient boost control.

 

[flubyux2]

hey john, im shopping for a couple of holsets for my next project since i might not be using the T88 next.

i want to make sure im asking for identical turbos... do you know when different versions of the holsets were introduced by production year? cuz im pretty sure not ALL the 2nd gen dodge diesel turbos are 12cm housing, not All of them are HX's, not all of them are HY's.... wasnt there an H1C or something too? if you can give me some more insight as to what variants there are... thatd be awesome

thanks
chris

 

[Krister]

Anybody running a HX35 in a 1JZ? I just bought one as a spare if my stock twins will blow up. It has a 48mm intake and 60mm exhaust wheel and a 12cm^2 housing. I might have to have the intake wheel changed to something that fits the exhaust wheel better, maby a 52-54mm wheel.

 

[MDCmotorsports]

Anybody running a HX35 in a 1JZ? I just bought one as a spare if my stock twins will blow up. It has a 48mm intake and 60mm exhaust wheel and a 12cm^2 housing. I might have to have the intake wheel changed to something that fits the exhaust wheel better, maby a 52-54mm wheel.

Stop thinking in Garrett terms. That turbo is a monster spool magnet and has enough air flow to make 425hp+.

 

[DavidBaustert]

I'm running the holset WH1C which is very similiar to the HX-35. Only difference is that the HX-35 is a ball bearing turbo whereas my Wh1c is a floating bearing. this turbo is super effiecent on my 550hp build. holset makes very good turbos...mine has over 200,000 miles on it off the diesel and still no shaft play

 

[Krister]

I'm running the holset WH1C which is very similiar to the HX-35. Only difference is that the HX-35 is a ball bearing turbo whereas my Wh1c is a floating bearing.

HX35 are not ball bearing turbos, maby they have offered one at some point, but 99% of HX35 are journal bearing type.