Last fall I “upgraded” the stock hx35 on my truck to a Calibrated Power Stealth 64 Hx35. This turbo is the same basic frame as a stock hx35 so I can still use my Jacobs exhaust brake. Calibrated power makes their own 11 blade billet compressor, compressor cover. They also make their own turbine wheel which is larger to match the larger compressor wheel, and use a 9cm turbine housing. I think this tight turbine housing is what is causing my issues. I have been battling egt problems with the truck since I put the turbo on. I’ve upgraded injectors after finding posts discussing the effects of too small of an injector with out enough fuel causing high egts. I have updated the old Edge JWA to a Quadzilla to be able to custom tune and have spent the last 6 months trying to get the egt back to where it was with the stock turbo and 75 horsepower injectors. 
 

Accelerating on the highway, at less than half throttle I can see 1350 on the egt pretty easily, with the truck empty. I sometimes carry my rzr side by side on the back of the truck on the flatbed, and with it on the truck, pulling a relatively large grade in northwest Colorado I struggled to keep the temps below 1300. With the old setup I would barely break 1200 with my 10,000 pound fifth wheel on the same grade. You could say I’m less that impressed with the turbo. 
 

I have been all over the truck searching for boost leaks, change every seal, gasket and o ring that could be causing a boost leak. I really feel that the increased compressor flow with the tighter exhaust housing is what is causing my problems. Does anyone know if I could buy a stock housing and have a company bore the housing out to accept the larger turbine? I’ve talked with Calibrated power about this and they told me they do not offer any other housing for this application. 

I did block line from the compressor cover to the waste gate actuator and on a small pull in 4th gear I saw about 30 psi, and the truck felt like it had a lot more power. The egt seemed slightly lower on my way to work about 30 miles from home. I wasn’t able to push it very hard because of the roads being wet as it has been raining all day. I will put the camper on it this weekend and see how it acts. 

11 hours ago, Nathan S said:

I did block line from the compressor cover to the waste gate actuator and on a small pull in 4th gear I saw about 30 psi, and the truck felt like it had a lot more power. The egt seemed slightly lower on my way to work about 30 miles from home. I wasn’t able to push it very hard because of the roads being wet as it has been raining all day. I will put the camper on it this weekend and see how it acts. 

 

Sounds like this might be a weak wastegate motor spring or no boost elbow. There was a post about guys ditching the wastegate motor all together and just using a spring to hold the wastegate shut. If done right using a bolt with an eyelet and the right amount of spring tension you can control the boost pressure on that turbo by tightening or lossening the spring tension. The drive pressure will build enough to naturally push the wastegate open. 

no adjustable elbow from the looks of it.. 

 

also from what calibrated says its a 64/67/9. Or 63/67/12...  The video on their website says 63/67/12.. The product description is vague as hell too, but does mention a 9cm^2 housing..

 

5 minutes ago, Silverwolf2691 said:

no adjustable elbow from the looks of it.. 

 

Go to be added. I've got a China made boost controller for the wastegate. I know @IBMobile is using the same as me. The old school boost controller is a brass elbow with a set screw for adjusting how much pressure makes it to the wastegate.

 

5 hours ago, Mopar1973Man said:

I've got a China made boost controller for the wastegate. I know @IBMobile is using the same as me

I ordered one a while back but it never showed. Does anyone have a link or a picture to one? I may try it again, I don't learn the first time 

2 hours ago, Dieselfuture said:

Does anyone have a link or a picture to one?

 

https://www.ebay.ca/itm/High-Quality-Inline-S-MBC-Manual-Boost-Controller-For-Impeza-WRX-STI-/293376084464?hash=item444e93c9f0

 

 

 

10 hours ago, Silverwolf2691 said:

no adjustable elbow from the looks of it.. 

 

also from what calibrated says its a 64/67/9. Or 63/67/12...  The video on their website says 63/67/12.. The product description is vague as hell too, but does mention a 9cm^2 housing..

 

I’m certain this one is the 9cm housing, it looks tiny compared to the other turbo. I did find that turbo lab of America makes a 67mm turbine upgrade for the hx35 with a new housing I am going to speak with them about it to see if it would work for my application. 
 

With the waste gate line pinched off completely I could only make about 28 pounds of boost today on my way home from work. The egt seemed about the same, but it’s hard to keep track of so many things at once plus drive the truck. 

1 hour ago, Nathan S said:

work for my application

Maybe I missed it, but what IS your application, as far as intended use of the truck? If your Jacobs brake bolts up to the HX35 like a PacBrake, then the HE351W would also work. Cheap at Benzforce.com. BlueOx01 is a hot shot driver and likes that turbo a lot. People more knowledgeable than me say it's similar to an HX35/40 hybrid, but modern.

11 minutes ago, LorenS said:

Maybe I missed it, but what IS your application, as far as intended use of the truck? If your Jacobs brake bolts up to the HX35 like a PacBrake, then the HE351W would also work. Cheap at Benzforce.com. BlueOx01 is a hot shot driver and likes that turbo a lot. People more knowledgeable than me say it's similar to an HX35/40 hybrid, but modern.

I use the truck to haul a water tank, tow my camper, and daily drive. Towing performance without having to stare at the pyrometer is my main goal. 
 

The Jacobs brake replaces the 5 bolt flange adapter that is outlet of the hx35, it’s not a v band or similar connection like an inline brake. 
 

 

51 minutes ago, Nathan S said:

5 bolt flange adapter

Okay, so it would bolt onto the HE351W. BlueOx01 uses his dually as a hotshot driver, as I understand it, so if he's very happy with the turbo I'm his application, I imagine most would be happy with it towing, too. Especially if coming from an HX35. I have one, too, and think it's great for daily driving.

1 hour ago, Nathan S said:

The Jacobs brake replaces the 5 bolt flange adapter that is outlet of the hx35, it’s not a v band or similar connection like an inline brake.

 

He351w is different than the he351cw from a later 3rd gen. (Same wheel sizes/not true after digging up @LorenS's thread. He341 compressor wheel with he351cw turbine) but 12cm^2 exhaust housing with 5 bolt flange instead of the he351cw flange.  

 

 

What are you running for tunes with the quad? At full spool at max level are you seeing a slight hazy trail of smoke? 

 

Also because i have to do this as well.. have you checked for boost leaks? I know it takes a large amount to cause this amount of boost loss but it doesnt hurt to check

 

After seeing that I sure wish I would have asked around on here before making the decision on the Stealth 64. Hopefully I can get this turbo to work how I expected it to from the beginning. 

You can still get it to run but its gonna take a bit of tuning with the quad and probably the boost elbow.

Max pump stretch: 1600

TPS max: 100%
TPS min: 20%
Min Pump Tap %: 0%
Pump Low Boost Scale: 10% 

Boost Scaling: 35 psi

 

Max Load Timing Offset: 2.0*
Low Boost Timing Reduct: 2.0*
Timing Reduction Scaling: 100% 

Light Throttle Advance: 1.5* 

Light Throttle Load Limit: 30%
 

1500 RPM: 14.0

2000 RPM: 18.0 

2500 RPM: 22.0 

3000 RPM: 26.0

Max: 27.5

 

0 Psi: 85

1 Psi: 87 

2 Psi: 89 

3 Psi: 91

4 Psi: 93

5 Psi: 95

6 Psi: 97

7 Psi: 100 

8 Psi: 103

9 Psi: 106

10 Psi: 109

11 Psi: 112 

12 Psi: 115

13 Psi: 118

14 Psi: 121 

15 Psi: 124 

16 Psi: 127 

18 Psi: 130 

20 Psi: 133

22 Psi: 136 

24 Psi: 139 

26 Psi: 142

28 Psi: 145 

30+ Psi: 148

 

That’s my current “daily tune”. I did download a tow tune from here and it seems to perform the same. 
 

Could running too little fuel cause the egt issues because the engine isn’t able to drive the turbo sufficiently? 

3 minutes ago, Nathan S said:

Max pump stretch: 1600

TPS max: 100%
TPS min: 20% - 0%
Min Pump Tap %: 0%
Pump Low Boost Scale: 10% 

Boost Scaling: 35 psi - 40 psi

 

Max Load Timing Offset: 2.0* - try 1*
Low Boost Timing Reduct: 2.0* - 5*
Timing Reduction Scaling: 100% - 50%

Light Throttle Advance: 1.5* - might be too low for cruise.

Light Throttle Load Limit: 30%
 

1500 RPM: 14.0 - 14

2000 RPM: 18.0 - 18.5

2500 RPM: 22.0 - 23

3000 RPM: 26.0 -27.5

Max: 27.5 - 30

 

0 Psi: 85

1 Psi: 87 

2 Psi: 89 

3 Psi: 91

4 Psi: 93

5 Psi: 95

6 Psi: 97

7 Psi: 100 

8 Psi: 103

9 Psi: 106

10 Psi: 109

11 Psi: 112 

12 Psi: 115

13 Psi: 118

14 Psi: 121 

15 Psi: 124 

16 Psi: 127 

18 Psi: 130 

20 Psi: 133

22 Psi: 136 

24 Psi: 139 

26 Psi: 142

28 Psi: 145 

30+ Psi: 148

 

That’s my current “daily tune”. I did download a tow tune from here and it seems to perform the same. 

 

Those are similar to what my truck likes. Need a bit more and faster timing pull with timing reduct and scaling, Especially with a larger turbo. The cruse is whats best for your truck, i have 4.10s so i have to add a lot of timing to my truck to get good mpgs and low egts on the highway.

Thank you, I will make those changes and go give it a try tomorrow and let you know how it works. 

1 hour ago, Nathan S said:

Max pump stretch: 1600

TPS max: 100%
TPS min: 20%
Min Pump Tap %: 0%
Pump Low Boost Scale: 10% 

Boost Scaling: 35 psi

 

Max Load Timing Offset: 2.0*
Low Boost Timing Reduct: 2.0*
Timing Reduction Scaling: 100% 

Light Throttle Advance: 1.5* 

Light Throttle Load Limit: 30%
 

1500 RPM: 14.0

2000 RPM: 18.0 

2500 RPM: 22.0 

3000 RPM: 26.0

Max: 27.5

 

0 Psi: 85

1 Psi: 87 

2 Psi: 89 

3 Psi: 91

4 Psi: 93

5 Psi: 95

6 Psi: 97

7 Psi: 100 

8 Psi: 103

9 Psi: 106

10 Psi: 109

11 Psi: 112 

12 Psi: 115

13 Psi: 118

14 Psi: 121 

15 Psi: 124 

16 Psi: 127 

18 Psi: 130 

20 Psi: 133

22 Psi: 136 

24 Psi: 139 

26 Psi: 142

28 Psi: 145 

30+ Psi: 148

 

That’s my current “daily tune”. I did download a tow tune from here and it seems to perform the same. 
 

Could running too little fuel cause the egt issues because the engine isn’t able to drive the turbo sufficiently? 

Pump low boost 15-20

Boost schale 40

Low boost timing redact 5

Light throttle advance low 20s

Light throttle load limit 20-25

Timing 14,18,22,28,30

 

Try it see what you think 

If you need quicker turbo spool up start the timing at 13 degrees it will spool faster. 

I would think that setting the Low PSI Timing Reduct to 5⁰ vs. 2⁰ should more than make up for starting the timing table at 15⁰ vs. 13⁰. That's what it is for, right, to retard timing to spool the turbo?

Fuel map I use for 150 HP injectors is...

 

0 to 5 PSI is 80% to 100% (smoke control)

5 to 15 PSI is STOCK fuel 100% (cruise band)

15 to 30 PSI is 100% to 150% (power band)

 

Now set the wire tap up for...

Low Boost for 15 PSI this way the wiretap and CanBus climb together making some serious power. 

TPS minimum for 50% don't need the wiretap for normal driving.

 

Now that 5 to 15 PSI stock power band allows for normal mountain driving providing plenty of power without pouring the coal to it. Above 15 PSI is all power band. This setup and a max of 29.5 degrees @ 3k RPM is what blew my head gasket. The power was very impressive.