Another Blown HX-40

[HEMI®Dart]

Add another Majestic prepped Holet HX-40 to the blown list. Exactly 2 weeks and 90 EASY miles its been on. I filled and pressurized the center section with oil before I fired it. Cold side impeller now has 1/4" side to side movement and some fore & aft movement. It won't build any boost. Starts making noise at 1/4 throttle. It still spins though. Only hit 35 lbs boost, then it let go. I don't have mega fueling or excessive EGT's.
Never had a hot turbo shutdown. Probably a bearing like you guys said. I'll pull it tommorrow and send it back to Majestic Monday. UNBELIVEABLE #ad


------------------
Bill R
94 2500 SLT 4x4 5 Speed, 3. 54 LS, JRE 4" exhaust, Autometer Pyro, Boost & Water temp gauges, Bosch 215 HP injectors, Timing @ 14. 7º, JRE Stage III #4 plate 270/675, AFC spring kit, High performance delivery valves, Piers prepped HX-40, Governer spring kit, ATS Pulse exhaust manifold, Scotty Air, Bully Dog Propane Injection, Roadmaster Active Suspension, Optima Red Tops, Geno's Exhaust Blanket, Espar Heater (won it!), Synthetic lubes throughout.



[This message has been edited by HEMI®Dart (edited 05-12-2001). ]

 

[work2muchplay2little]

Bill, I'm really sorry to hear that. I reread Chris's post and am wondering if the problem has been isolated to Holset or Majestic? Hope it's up and running again soon.

------------------
Kurt Voss
********* 1999 2500 24VCTD AUTO 4x4 QC LB Laramie SLT, Luverne stainless steel nerf bars, 3 piece bug deflector, mopar mud flaps, Line-X bedliner, Blue Chip Fuel Management System (Premium), Psychotty Air, DD3's,TTPM, DD 4" exhaust, HX40, DTT VB/TC(91%) , Mag-Hytec transmission pan... YEEEEEHAAAA!!
2000 4x4 Z71 Tahoe, all options, rear AC, brush guard, nerf bars, mobile video system, after market 3rd row seat... the ultimate urban assault vehicle!

 

[Arcticat]

#^&#$%%^*&!!! Stupid #$^$%**HXmother#%^*&40!! This sucks for sure, Bill. I hope you are treated well by Majestic. I hope to install my own 40 within the next couple weeks. My particular turbo has been run without problems BEFORE it was modded by Majestic, so if it fails we will have concrete evidence that Majestic is at fault and Holset bears no responsibility. This has to leave a sour taste in your mouth but I hope it doesn't deter you from following through on your overall summer BOMBing blueprint for that truck of yours. Keep the faith.

 

[RobG]

My UNMODIFIED HX-40 (aside from whatever DD does to it) is working great so far, after about a month and about 1500 miles or more of use, including a major climb up the Grapevine near LA twice.

Just how much better does this thing spool up after Majestic has dinked with it (when they don't die, that is)??

Rob


------------------
2001. 5 RAM 3500 QC 4x4 ETH/DEE Silver/Agate, 4. 10, USGear OD, Rickson 19. 5 Wheels, DD EZ, DD3 Injectors, HX-40, Southbend Clutch, SPA Guages, Psychotty, Firestone Airbags, Hellwig Rear Swaybar, Torklift Superhitch & Camper Tiedowns, Mag-Hytec Diff Cover, DD 4" Exhaust, US Gear Exhaust Brake, etc.

 

[SmokinJoe]

Originally posted by RobG:
Just how much better does this thing spool up after Majestic has dinked with it?

I would never let anyone dink with a turbo. Clipping the fins is just asking for disaster. At 50 lbs. of boost those things are really screaming. The new trend for import drag racing is ball bearing turbo applications. What the Cummins guys really need is a blow off valve to limit boost as well.

The other thing is going from 50 lbs. of boost to vacuum/0 PSI is the turbo shaft killer. The only way to treat that might be an auto trans...

------------------
2001. 5 QC 2500 White Sport 4x4 LWB ETC 5-Speed Anti-Spin 3. 54 Trailer Tow 241HD SLT+ Tan Leather(Mad Cow Disease) LT265/75R16E ARE Z Series Cap Bedrug ICI Nerfbars


[This message has been edited by Smokin Joe (edited 05-12-2001). ]

 

[drawson]

Thats a real bumber Bill, It really sucks to go backwards!!! #ad
#ad

 

[Evan A. Beck]

... import drag racing...

Just have to laugh at that one! #ad


HEHEH

 

[HEMI®Dart]

I pulled the HX-40 today (the last thing I wanted to to today). Here's what I found.

The common shaft that both wheels are attached to is not broken. I have about a 1/4" movement(up & down & side to side) on both the impeller (cold side) wheel and the turbine wheel(hot side) in the exhaust housing. I can touch the housing with the blades on both ends, cold & hot sides. Also found engine oil in the exhaust housing.

Sounds like bearings to me?

I hope Kevin @ Majestic will cover it under their 6 month warranty. Things will get ugly if not. I can't afford to eat $1,200. #ad


------------------
Bill R
94 2500 SLT 4x4 5 Speed, 3. 54 LS, JRE 4" exhaust, Autometer Pyro, Boost & Water temp gauges, Bosch 215 HP injectors, Timing @ 14. 7º, JRE Stage III #4 plate 270/675, AFC spring kit, High performance delivery valves, Piers prepped HX-40, Governor spring kit, ATS Pulse exhaust manifold, Scotty Air, Bully Dog Propane Injection, Roadmaster Active Suspension, Optima Red Tops, Geno's Exhaust Blanket, Espar Heater (won it!), Synthetic lubes throughout.



[This message has been edited by HEMI®Dart (edited 05-15-2001). ]

 

[HVAC]

While the HX40 has had it's problems, the sloppy bearing problem seems to be exclusively tied to Majestic. I can only speak from personal knowledge, not research. But I will make the observation that the stock turbos seem to break the shaft as a result of excessive boost levels. This is different from the problem Chris Sutton, Thomas Meers, and Bill have experienced.

Paraphrasing one of my turbo gurus; the shaft rides on a film of oil. If the balancing is off, the film is broken and the bearing is ruined in short order. If this is true, then I have to wonder if Majestic is having a problem getting the 40's properly balanced.

Note to Evan, the ricers have their own class at Sears Point. Funny thing is I believe I can run in their class since the Cummins is a six cylinder! #ad

---------------------------------------------
Nowel/Performance Diesel

 

[Hammer]

Oh great,,Just what I want to hear as mine lies a waiting on the bench for me to on tommorrow,,Guess I'll wait to do that to see where this thread goes,,Hope I did not spend my money foolishly here,,Just got done now with the rpm spring kit and injectors and run out of steam for turbo tonite,,Keep me posted Hemi,,Let me know what they find...

------------------
98, Flame Red, Quad Cab, 2500, 4x4, 5spd, Autometer and Cyberdyne gauges,Edelbrock Performer IAS shocks,TST#10 plate,16cm housing, B-D Exhaust Brake,Timing Advanced,K&N,Totally Amsoiled,Cat Muffler and Silencer ring ALL M. I. A. ,A BOMBING IN THE PROCESS!!

 

[Diesel Guy]

What is the advantage of having Majestic "do their magic" on the HX-40 (assuming it stays together)?

 

[EMDDIESEL]

Does the HX-40 bolt right on to the stock manifold and the stock exhaust (or JRE in m case) and can you use it on a bone stock (24v) engine in an auto?. Or will the computer have no idea whats going on and will i have the check engine light on?

 

[Vaman]

Majestic offers several options for turbo tweaking. Some of them are peformance enhancers (clipping, etc) and others are pretty much cosmetic. I checked into it before I installed my 40 and decided not to have it done. I'm very happy with my stock 40 by the way and I know of no central bearing failures on stock 40s. As far as mounting it, it will mount directly to your manifold but on the exhaust side, you'll need a 4" clamp and collar to connect to your downpipe.

------------------
98. 5 2500, 24v, 5 speed, QC, 4x4, 4. 10 LSD, short bed, Line-X liner, tow package, camper suspension, Westin nerfs, camper shell, TST PowerMax Competition, 275 RVs, Psychotty air, HX-40, 4" straight pipe exhaust, ProComp A/T 305/70/R16s, EGT/Boost/Fuel pressure pillar gauges, Grover air horns... Love my Cummins, no love for Dodge

 

[SmokinCummins]

Smokin Joe... I've wanting a Blow off valve for some time now. I have talked to people about them but it seems HKS and people like that only have one that will hold 30 psi if there lucky he said. Do you know where Blackdog and I could get them?

------------------
1994 2500 Regular Cab Longbed, 4x4 Red & Silver, Stainless Steel Rocker Panels, 2. 5" Skyjacker, tweaked afc & pump, BIG plate, HX35 w/16cm housing,no muffler or resonator, 16. 5x9. 75 Weld Rims, 33x12. 50 BFG Mud Terrians, 60 psi boost gauge, pryometer, J&J Stainless Steel rear 10" drop bumper w/backup lights, Westin pushbar, PIAA 90 Pro series lights, Weatherguard toolbox 27", Aluminum bed rails & tailgate protector, President Lincoln H. A. M. radio converted, 400 watt linear, Premier Pioneer stereo, *COMING SOON* 370 hp injectors,

 

[Bad340fish]

I don't believe blow off valves are for boost control. WHat I know of them bieng for is to prevent the loss of boost between shifts. Since we have no throttle blades on diesels its really not that big of a deal. On a gasser you have a thottle blade that snaps shut and turns the air flow back to the turbo usualy makes a barking noise(we called my old conquest the squirel for this reason lol). Most BOV are vaccuum operated also. Since our only source of vaccuum is a pump I don't think it would work to well lol.

Also, a BOV could maybe control boost but it would not prevent turbo overspeed. With a hole in the intake system the turbo will have to work its @ss of to hold that boost. Also its easy to open something that has pressure behind it but its hard to close it. Well thats my . 02

------------------
Clark
1999 2500 QC SB 5spd, EZ, Flowmaster 3 chamber, K&N Re-0880
1968 Barracuda Formula S Viper Blue 11. 98@112 Currently scattered all over the garage

 

[Mad Max]

Didn't get into spec's but here's a place to start?
http://www.greddy.com/products/blowoffvalves_frame.htm

Good Luck

MaX

 

[Jff24Gordn]

I dont know about you, but my turbo will bark. I have asked a few friends about blow off valves. They have turbo imports. They said the blow off valve dumps out air when you let off the throttle. This works on a gas engine by using the vaccume in the intake. By blowing off the air, it heeps the turbo from being forced to slow down or backspin from the extra boost and no exhaust to go with it. This allows the turbo to be spinning faster when you are through shifting and it taking less time to rebuild the boost. If we could figure a way to open the blow off valve when the throttle is let off of then we might have something. If we could program a little computer box to open the blow off valve when there is more then 15# boost and the throttle is at idle.

------------------
1996 2500, 4x4, 5 speed, pscotty air, 15. 641 second 1/4 mile @87. 34 mph STOCK parts
-- email address removed -- Great Lakes TDR
PURDUE STUDENT 
GO BOILERS

 

[SmokinJoe]

Originally posted by Evan A. Beck:
Just have to laugh at that one! #ad

HEHEH

DC laughed, said that for HP you need more flow on the 2. 5 Turbo I motor. As I recall there are two guys in the USA running 30-50 psi and are doing like 11-13 second quarter miles. The DC engineers said no way...



------------------
2001. 5 QC 2500 White Sport 4x4 LWB ETC 5-Speed Anti-Spin 3. 54 Trailer Tow 241HD SLT+ Tan Leather(Mad Cow Disease) LT265/75R16E ARE Z Series Cap Bedrug ICI Nerfbars

 

[Shawn.L.Turbo]

HEMI, what sound was your turbo making when you figured it went south?

Was it doing it all the time, or just under certain conditions?

Shawn

 

[My 6 Eats V8's Old File]

something to think about here guys is the hx40 is spinning 130000 rpms making 41 psi boost. Anytime you take mass off the wheels it has a destructive impact on the integritey of the wheel. Anytime you take wieght off one side of a wheel it desturbs the dynamic(front to back) balance of a wheel, so by clipping(witch by the way has a negative affect on spoolup dew to less fin area), lightening, adding a bullet(wieght) your potentially destroying your turbos, and your paying for it on top of this. I hope nobody takes affence to this but I don't like seeing all you guys spending all this money. #ad