Pyro probe Q
Senior User
Joined: Jun 2003
Posts: 369
Likes: 0
From: Colorado Mountain Country
If you are running a stock turbo, I think 22psi is just fine. Just FYI, my rig is on 35" tires with a DP chip, TN BB turbo with a Spearco IC, and when I pull the I-70 Westside of Vail Pass going east, on the 80 econ setting in overdrive, my EGT's vary from 1150 to 1250 during the whole pull UP the pass. Empty, the truck never shifted from overdrive. I personally don't think you have any problem, but that is my opinion, because I, too, live at high altitude(8000ft).
Postmaster
Joined: Jul 2006
Posts: 4,993
Likes: 2
From: Bend, OR
Maybe that's it. My idle temps seem to be pretty consistent with everyone else's. I never get below 280* in the 80 econ tune though. I don't care how long it sits. I get a HUGE cloud of black/white smoke when I barely get on it too. Also think my truck should be faster than what it is. I'll go out and look for soot I guess? What do you make of a "squeaky" wastegate at part throttle? Sounds like its opening/closing repeatedly sometimes.
Sounds like you have a bad case of surge... ATS Compressor housing, a WW or a 1.00 exhaust housing are all good fixes for surge. You will NEVER hear the wastegate open on a stock 7.3 turbo...
At WOT I'm getting around 20-22 psi. I can't stay in it long cause the EGTs climb so darned fast. I drove again today....ambient 70*, level ground, cruise at 67-70 mph I was around 675*. As soon as I hit the slightest incline (boost at 5psi) I shoot up around 900*+. Wouldn't boost suck if I had leaky up-pipes? I checked up-pipes a couple of weeks ago and had no soot. I'm thinking I shouldn't get the cloud of black/white smoke just when I change lanes (maybe 1/4 throttle) either. The cloud is big enough to cover 3 lanes on the interstate.... kind of fun.
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
You should be able to get to 25 easily without horrible EGTs. With the 6637 and 5" exhaust, you shouldn't be at 1250 until you've been on it for a while. Like Curtis said, you have other issues. Check your boots for leaks/tears (might want to build that cheap PVC boost tester), and look for soot around the up-pipes and make sure they're not loose. You have classic symptoms of a leak someplace (high EGTs, low boost). I can hit 25-27 easily and not be in the red until I'm over 100mph and still have my foot in it. 
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Elder User
Joined: Jun 2007
Posts: 705
Likes: 1
From: Sandia Park, NM
Sounds like you have a bad case of surge... ATS Compressor housing, a WW or a 1.00 exhaust housing are all good fixes for surge. You will NEVER hear the wastegate open on a stock 7.3 turbo...
Pull your intake tube off and grab the compressor wheel, feel for any play up or down and in and out. The smoke makes me think you may have a bad turbo...
Pull your intake tube off and grab the compressor wheel, feel for any play up or down and in and out. The smoke makes me think you may have a bad turbo...
Thanks to all for all of the help!
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Elder User
Joined: Jun 2007
Posts: 705
Likes: 1
From: Sandia Park, NM
Ran pretty much the same in the 60 tow and got hotter than crap really quick in the 120 setting. There's another thread around here about EGTs. I noticed my pyro does not go back to 0 when I shut it down. It sits around 125. Bad probe? I bought the autometer kit from Jegs. I'll try the stock setting when I go to Autozoo later. Anyone know of a site similar to this for Subarus? I have to do the brakes on my girlfriend's WRX today. 
EDIT: on 60 tow I got 17psi, 50mph (speed limit), 900*. 120 race I was looking at 25psi, 50mph (speed limit), 1100*.
EDIT: on 60 tow I got 17psi, 50mph (speed limit), 900*. 120 race I was looking at 25psi, 50mph (speed limit), 1100*.
Last edited by 01PS; Apr 27, 2008 at 02:21 PM. Reason: Boost Levels
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Elder User
Joined: Jun 2007
Posts: 705
Likes: 1
From: Sandia Park, NM
Sounds like you have a bad case of surge... ATS Compressor housing, a WW or a 1.00 exhaust housing are all good fixes for surge. You will NEVER hear the wastegate open on a stock 7.3 turbo...
Pull your intake tube off and grab the compressor wheel, feel for any play up or down and in and out. The smoke makes me think you may have a bad turbo...
Pull your intake tube off and grab the compressor wheel, feel for any play up or down and in and out. The smoke makes me think you may have a bad turbo...
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
That much oil in just a couple weeks seems like more than just from leaking boots. I didn't do the CCV Mod until 95k and never had oil on top of the engine or any in the valley. Just some oily grime around the boots. Try to find where that oil is coming from other than the boots.
You can always use a compressor at a station or a shop.
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Elder User
Joined: Jun 2007
Posts: 705
Likes: 1
From: Sandia Park, NM
For comparison this is my turbo wheel at 94.5K. Stock air intake up to then.
That much oil in just a couple weeks seems like more than just from leaking boots. I didn't do the CCV Mod until 95k and never had oil on top of the engine or any in the valley. Just some oily grime around the boots. Try to find where that oil is coming from other than the boots.
You can always use a compressor at a station or a shop.
That much oil in just a couple weeks seems like more than just from leaking boots. I didn't do the CCV Mod until 95k and never had oil on top of the engine or any in the valley. Just some oily grime around the boots. Try to find where that oil is coming from other than the boots.
You can always use a compressor at a station or a shop.