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Old 06-29-2013, 07:53 AM
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towing upgrades

My Rig below is having trouble pulling my 39' foot 13k keystone raptor toy hauler. My pyrometer is on the driver side right before the up pipe. On really small hills I'm having to back off the throttle due to EGT creeping up into high 1300 range. I don't seem to see more than about 15 psi of boost by Edge CTS.

Can't afford a 38r so I will also be ordering a hydra, WW2 from diesel site or riffraff billet wheel, turbo master wastegate, non-ebpv pedastal and outlet from diesel-orings, dorman up pipes (to eliminate any possibility of leaks - lower EGT). I'm considering a 1.0 exhaust housing but worried it will have an affect on the bottom end with a WW2.

and Max a/c control (b/c its cheap and live in hot as hell texas).

Also I need a new air filter so I'll try riffraff 6637 w pre-filter



My rig - 1999.5 CC LB dually 7.3 with 4" mrbp Stainless Turbo-Back Magnaflow Exhaust, 6.0L Trans. Cooler, Foil MOD, CCV Mod, AMSOIL DIY Intake, ATS Ported Turbo Housing, Edge CTS Insight, HPX, Mag-Hytec Trans & Diff Cover, BTS V/B. A fass fuel system and regulated return w bowl delete is waiting to be put in.

by the way 6637 at riffraff are only 28.99
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Old 06-29-2013, 12:17 PM
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15 psi of boost is your issue.
thats wayyy to low.

you probably have a boost leak somewhere. which causes high egts cause the motor cant get air.
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Old 06-29-2013, 02:14 PM
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I have the CS NOT the CTS

it does seem low to me.

Is the CS evolution gauges accurate?

I go out later tonight and verify the boost max psi at wot.

How do you recommend I start to diagnosis why?

There isn't any soot on the up-pipes they are very clean

Last edited by needinajeep; 06-29-2013 at 02:19 PM.
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Old 06-29-2013, 04:34 PM
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My bet is your boost issue isn't the exhaust side, but the boots from the turbo, or on the IC.

Boost is low, egts are high, with no other issues, leads me to think its a leak somewhere.
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Old 06-29-2013, 05:35 PM
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have you ever had your IC boots off? maybe they didn't seat back?
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Old 06-29-2013, 08:01 PM
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sometimes it is extremely difficult to find a leak in a boot.
their can be a split that is only visible if the system is pressurized.
riffraff sells boot kits that are inexpensive and great quality.

if you have taken the intake manifold off recently you could have a leak where it attaches to the turbo.
i have had this leak on my truck several times after i pull the manifold off or loosen it.
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Old 06-29-2013, 11:27 PM
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Ok tonight I had a couple runs on the freeway and frontage with video

first one is from an almost dead stop to WOT down the frontage road on flat ground, NO trailer, or incline. Right after I stopped filming I hit low 1300 egt's.

https://www.youtube.com/watch?v=mfW3o_2JNdg

second is rolling down the road at 40-50 then WOT and again I dipped into 1300 egg's. Traffic was a little heavy.

https://www.youtube.com/watch?v=E8kUwWoZDpg

The best I could do was 14 psi at 100 % load and dipped into 1300 EGT each

I definitely have soot escaping from the up pipes, I finally could plainly see it after climbing under truck w a flashlight.

I did take drivers side IC tube couple weeks back because of replacing a hydro-boost line to power steering pump developed a leak from rubbing on top of the shock bolt. I will reseat it in the morning to be sure there is no leaks. I haven't taken apart or disconnected any other hoses on IC, turbo, or intakes.

Last edited by needinajeep; 06-29-2013 at 11:35 PM.
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Old 06-30-2013, 05:29 AM
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Clean it good and spray hair spray on them
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Old 06-30-2013, 12:23 PM
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ya hair spray works like a charm.

i would get some bellowed up pipes and be done with it.
you should get almost double the boost once you fix the leak.
that should really lower the egts.

while your doing up pipes mine as well get a billet compresor wheel for the turbo.
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Old 06-30-2013, 12:42 PM
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If you're getting all new parts, get all new boots too.
You can pressurize the system and see if the CS reads the same amount of PSI as you pressurize with. It should, and the means the MAP sensor is reading right.
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