Truck as per sig. No problems, but curious

When accelerating the truck a bit, uhh, vigorously, my boost can quickly hit 25 psi and she just hummmms along 80mph (boost drops appropriately). No smoke, EGT 6 -700, no problems. I've gone 90mph for a few miles, and although she felt solid, EGT in the green, I did not push beyond that.

Given that, I think the PO must have upgraded the turbo. Could a stock turbo do this well? And if I want to check on the make of the turbo, is there an 'easy' way - I can strip bolts w ease, so I don't want to mess with it just to satisfy my curiousity.... And no, the PO is not available to ask!

 

Take a picture... And post it.

My bet is your pyro is in the down pipe or the thermocouple is going bad.

 

uhh, no problems w the pyro I think... temp goes up w hard acceleration then quickly drops down to about 300 on hiway driving (65 - 75 in Maine). Will also need to pay more attention to the exact temp reading and write them down.

 

I'm seeing @ 300-400 at idle. Probe in exhaust manifold.

 

Yep 600 - 700 driving on the interstate....

 

You guys are missing the point! He's telling us how great his truck is and how pleased he is (and should be!), and you guys are talking about his pyro sensor LOL.

You must have a really good setup, got some pics?

 

I don't see a tuner in your signature. Stock tuning isn't going to make 25#s of boost with any turbo. If your boost gauge is accurate, you should be setting the check engine light intermittently with an over boost code, unless you have either a boost fooler on the map line, or tuning on the PCM. If you can floor it to 80 and not reach at least 1000* EGT, then either your driving a unicorn, or you probe is either bad, or after the turbo.

 

I see my pryo at idle...driver's ex manifold...~300 degrees.

 

that is the tuner making that boost on the stock turbo. without the tuner, it will only make 15-17 psi boost.
my 02 will make close to 30 if i really get into it.
600-700 degrees on the throttle, and 300-400 degrees exhaust temps while cruising sounds a little low, i usually see closer to 600-700 degrees cruising and 900 to 1,000 while in the throttle.

 

Bully dog tuner set at 70hp, just as the PO set it.

And yes, very happy with its performance. I finally found a 7.3 mechanic (hehas 2 or 3 7.3 work trucks of various years and configurations - including a wrecker) and will go through the engine to see what's been upgraded or need preventative maintenance. Just not sure when I can find the time.

And thoughts of good karma to the PO for giving up such a sweet rig. And more so to his wife from NC who never acclimated to the cooler weather here.

And she does seem to run a bit cool, especially in the winters up here. Despite having the grill blocked last winter, hiway cruising was under 300*. Not that I'm complaining, but overheating is not a concern.

Will try and take some pics this weekend - leave for work before full light and home well after dark.
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Quick and fast enough that I'm wondering about upgrading the brakes given its weight/inertia.

So the excellent boost pressures would be more from the Bullydog rather than a better wheel? Both? I hear a most pleasant whistle accelerating to speed.

 

You never said where the Pyro was located? If in the down pipe add 150 degrees to the temp where it would be in the exhaust manifold. But all and all it sounds good.

 

I peak at about 23 psi with a stock turbo on my stock engine. It is an E99 and I don't have a chip or any performance mods on the engine. It will set a code if I push it without the boost fooler in place. I have put on the RiffRaff boots on the entire system, bellowed Up-pipes and so on so it should be running as good or better than new.

As far as the EGT's it does sound like you are lower than you should be. Running down the highway at 65 to 70, I am running 600 to 700 and peak at 1100 when pulling a load. I idle at 300 which all falls in line with the norms that I see from others. If you are running 300 while driving, what is it at idle? Like others have said, I would think either your gauge is off or the prob is not installed in your manifold.

Either way, glad it is running good and you are happy with the truck.

 

I was able to reach 22 PSI with zero mods to the fueling and without tuning on a stock truck. I did, however, have air mods: 4" exhaust, AIS with sleeve, and red line mod. If I installed the boost fooler, I might have popped 23 PSI boost, but now I'm way past that point to try it.

Dual EGT sensors on the manifolds: 550 degrees EGT at 65 MPH on the flat with no wind, 250 degrees at long-term idle (confirmed by gun), 600-700 at 75 MPH. My stage II sticks, 38R, and live tuning throw a lot of variables in there, though.

 

Going on a longer drive Friday and will have help recording temp, rpm and speed. I've noticed I would ease off the fuel a bit when looking at the pillar, and the temp drops dramatically as the rpms drop. Coasting a bit down a hill tonight, the temp was about 150 at 40mph (coasting from about 50).

Will try to trace where the pyro is attached as well as some engine pics.

Thanks for the help

 

Yes indeed that is very cold. If it is correct, which I doubt, it would be too cold for proper combustion and I might be a little concerned, although I do not believe our engines are susceptible to wet stacking (someone correct me if I am wrong). Still, a cold diesel gets poor mileage and has higher engine wear than one running at proper temps.