Nathan S

Just as an update, I received everything in a timely manner from CPP. After reading this thread I sent them a couple emails asking about my order, got replies within a couple hours. An employee named Jessica also called me to make sure that I didn’t have any further questions. I hope they have seen threads like this and are making improvements. Like I said before, I don’t use just one vendor, and have had good experiences with all of them I have used aside from Calibrated Power in Illinois.

It’s interesting how people can have such different experiences with them. I’m not loyal to any diesel shop in particular, and have spent several thousand dollars with CPP in the past. Just the other day I ordered a few parts from them. Got an order confirmation within minutes, shipping confirmation for both things came yesterday as I placed the order on Sunday. XPD has always been great to deal with, as has Diesel Power Products out of Washington. DAP is another shop I’ve purchased from and had good luck. It’s too bad you had such a bad experience.

Do you think the out of balance condition would still cause the rub even with the shaft vertical on the bench and basically no centrifugal force on the shaft? It feels more like it’s out of round to me, just because the rub isn’t consistent all the way around the housing.

Thank you. I will keep that in mind for when the turbo is either repaired or if I go the compound route. I need to talk to calibrated power before I make a decision on what the next setup will be. I feel like the mechanical problems with the turbo are what was causing the majority of the issues. The rubbing issue will only get worse as the turbo gets hotter, then making it contact those places in the housing 100,000 times a minute while it’s as spooled as it could get probably causes a lot of drag on the rotating elements.

Well I got the boost elbow put in this morning. I bottomed the screw out so the wastegate is essentially blocked. I ran the truck up a hill we use for bench marking in the area, about a 6% grade that’s about two miles long. The egt in 5th gear was 1300+ with the truck empty. Just accelerating in 4th gear to get back up to speed between 1500 and 2200 rpm the egt got to 1100. I’m gonna put the other turbo on and see what it does. When I had the intake tube off to put the boost elbow in, I noticed the compressor spins much easier one direction than the other. The blades should slap the air similar to a pump, correct? Spinning in this direction it would stop before a full rotation. It would spin about 2.5 rotations the other direction. Edit: Got the turbos swapped out this afternoon. There is a definite rub in the stealth 64 with it on the bench. There are a couple of spots you can actually hear the metal to metal contact and feel either the compressor or turbine rubbing. I am gonna talk to calibrated power again before I pull it apart to see what it is. Egt up the same hill with the same tune, just stock turbo with a wicked wheel and a banks quick spool housing was 1050 egt up the same hill as earlier today.

I haven’t driven the truck on the highway but it is much more responsive in town those changes. Thanks for the tips and the clarification on how the scaling works.

I paid 11,000 for mine in 2008 with 68,000 miles on it.

I browse eBay for second gens a couple times a month, seems like people want more for some of the trucks than what they cost new. Don’t get me wrong, I’ve really enjoyed having mine and will for years to come but I can’t see how people can ask 25-30k for a second gen.

That’s the way I understand it to work, but with the scaling set to 50% I’m only going to see 2.5 degrees of that total 5 degrees correct? I did make the changes suggested by Silverwolf2691 and the truck seems much happier. Still waiting for the boost elbow to arrive, and I haven’t pulled a trailer with it yet but I will this weekend.

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

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?

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.

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.

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.

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.