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#4664161 - 02/12/18 05:49 PM Babied diesels
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4858
Loc: Houston, Texas
Are diesels supposed to be run hard? I've heard diesels will buildup carbon if they aren't run hard periodically. Although I'm not sure what that entails I can hit 1100 degrees without passing 10 pounds of boost on my truck.


Edited by motor_oil_madman (02/12/18 05:50 PM)
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4664171 - 02/12/18 06:08 PM Re: Babied diesels [Re: motor_oil_madman]
bigj_16 Offline


Registered: 07/03/17
Posts: 1268
Loc: Douglas County, Colorado
Originally Posted By: motor_oil_madman
Are diesels supposed to be run hard? I've heard diesels will buildup carbon if they aren't run hard periodically. Although I'm not sure what that entails I can hit 1100 degrees without passing 10 pounds of boost on my truck.

Two stroke diesels really need to be run hard, or they absolutely will carbon up.

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#4664223 - 02/12/18 06:58 PM Re: Babied diesels [Re: motor_oil_madman]
Farmer Offline


Registered: 08/05/15
Posts: 1111
Loc: BC Canada
Originally Posted By: motor_oil_madman
Are diesels supposed to be run hard? I've heard diesels will buildup carbon if they aren't run hard periodically. Although I'm not sure what that entails I can hit 1100 degrees without passing 10 pounds of boost on my truck.


Where's your pyrometer location? If you sit in too high of a gear you can also create unnecessary heat; meaning you don't have enough boost to keep the temperature down.

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#4664227 - 02/12/18 07:01 PM Re: Babied diesels [Re: motor_oil_madman]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4858
Loc: Houston, Texas
Pre turbo. I noticed that too. I can stick my foot in it and the temp will go down.


Edited by motor_oil_madman (02/12/18 07:02 PM)
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4664342 - 02/12/18 09:09 PM Re: Babied diesels [Re: motor_oil_madman]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: motor_oil_madman
Pre turbo. I noticed that too. I can stick my foot in it and the temp will go down.


I think this usually means you should step down one ex turbine housing size.

Cummins/Holset turbos are weird metric. I dropped from a 14cm3 to a 12cm2 and it made a nice difference.
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#4664351 - 02/12/18 09:18 PM Re: Babied diesels [Re: motor_oil_madman]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4858
Loc: Houston, Texas
The turbo oulet is small on my truck. 2.44in if I remember
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4664392 - 02/12/18 10:12 PM Re: Babied diesels [Re: motor_oil_madman]
clinebarger Offline


Registered: 12/19/13
Posts: 1916
Loc: Fort Worth, Texas
You have a Variable Geometry Turbocharger.....This coupled with a lot of EGR Flow can make for some wacky EGT readings.
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#4664398 - 02/12/18 10:20 PM Re: Babied diesels [Re: motor_oil_madman]
clinebarger Offline


Registered: 12/19/13
Posts: 1916
Loc: Fort Worth, Texas
I don't really trust post turbo EGT readings either. The whole point of monitoring it is so you don't melt a piston or drop a exhaust valve seat. Guessing with calculations is just that....Guessing!
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#4664423 - 02/12/18 11:21 PM Re: Babied diesels [Re: motor_oil_madman]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4858
Loc: Houston, Texas
Back on topic! Sheesh. Lol
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4664430 - 02/12/18 11:32 PM Re: Babied diesels [Re: motor_oil_madman]
DoubleWasp Offline


Registered: 05/21/12
Posts: 5236
Loc: Fort Lauderdale, FL
You still have your emissions? When I still had mine, my 7.5 6.7 would turn into more of a dog each day I drove it nice and easy.

Always got best fuel economy and power by making sure to stick my foot in it kind of regularly.

Might still be true. I don't know because I always stick my foot in it on the regular since I deleted.

Out turbine housings are too small. Notorious. Increasing the size is incredible for reducing drive pressure and EGT's, while taking on more power. Quite a few companies that punch them out to 66mm.
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#4664444 - 02/13/18 12:47 AM Re: Babied diesels [Re: motor_oil_madman]
Bailes1992 Offline


Registered: 03/10/17
Posts: 119
Loc: South Wales, UK
I had a 2015 Ford Focus 1.5TDCi which I owned myself. I put 66k on it using only BP Ultimate or Shell V-Power diesel, I nursed it from day one and never really gave it a hard time. It spent most of its life with me at 70mph with cruise control on. I even moved from the OEM 5w30 WSS-M2C913D oil and started using an ACEA C3 oil for blthe higher HTHS and less SAPS to clog the DPF and inlet manifold and run 5k OCIs

The car was forever having issues, stuttering, hesitation and dumping diesel into the oil.

I now have a company car. A 2016 Ford Focus 1.5TDCi which gets serviced every 12.5k, gets run on supermarket diesel and I beat the life out of the poor thing. It's quieter, faster and so far has been much more reliable!
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#4664451 - 02/13/18 01:22 AM Re: Babied diesels [Re: motor_oil_madman]
clinebarger Offline


Registered: 12/19/13
Posts: 1916
Loc: Fort Worth, Texas
Originally Posted By: motor_oil_madman
Back on topic! Sheesh. Lol


I will no longer post to any of your threads, I was trying to help...I have a lot of 6BT/ISB experience.
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2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/Auto

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#4664634 - 02/13/18 09:24 AM Re: Babied diesels [Re: motor_oil_madman]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2384
Loc: Balearic Islands , Spain
Many mechanics, including some i know, when they get a diesel that is running rough in the shop still go out on the highway for about half an hour or 45 minutes and drive them hard, a.k.a revving them hard on each gear change, from what they tell me a lot of people just don't drive them hard or long enough and the EGR valves and DPFs clog up with soot.
Here in Spain Diesels account for over half of all cars, and people like to lug them around in high gear all day.
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#4665160 - 02/13/18 07:41 PM Re: Babied diesels [Re: clinebarger]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4858
Loc: Houston, Texas
Originally Posted By: clinebarger
Originally Posted By: motor_oil_madman
Back on topic! Sheesh. Lol


I will no longer post to any of your threads, I was trying to help...I have a lot of 6BT/ISB experience.



No you're fine man, I just didn't want the thread to get side tracked talking about turbo chargers.
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4665519 - 02/14/18 07:56 AM Re: Babied diesels [Re: FordCapriDriver]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4858
Loc: Houston, Texas
Originally Posted By: FordCapriDriver
Many mechanics, including some i know, when they get a diesel that is running rough in the shop still go out on the highway for about half an hour or 45 minutes and drive them hard, a.k.a revving them hard on each gear change, from what they tell me a lot of people just don't drive them hard or long enough and the EGR valves and DPFs clog up with soot.
Here in Spain Diesels account for over half of all cars, and people like to lug them around in high gear all day.


Does that hold true for the older diesels too?
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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