Interesting Turbodiesel Facts & Fiction - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by worm drowner, this thread has received 10 replies and been viewed 1333 times.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old 12-10-2007, 04:52 PM Thread Starter
 
Join Date: Sep 2007
Posts: 293
Points: 1,727
Thanks: 0
Thanked 0 Times in 0 Posts
Interesting Turbodiesel Facts & Fiction

This was on Banks' website: http://www.bankspower.com/tech_TD-fact-Fiction.cfm

Turbo-Diesel Fact & Fiction

Exposing some of the misconceptions and outright lies about today’s diesel engines.

By C.J. Baker

Today’s diesel engines are saddled with a lot of myths and misinformation. In all fairness, some of the bad rap was justly deserved in recent years, but the new generation of clean turbo-diesel engines for light trucks and motorhomes bears little in common with those of just a few years ago – it’s not your Granddaddy’s diesel anymore!

Clean diesel technology may well win out over alternative fuel vehicles, such as those that use compressed natural gas (CNG), hybrid, or even fuel cell technologies. Clean diesel designs will cost less to produce and buy, operate more cost effectively, and won’t require a completely new fueling infrastructure. The World Wide Web offers a wealth of information on this topic. Just use the search words, “clean diesel”. Does this mean everyone will drive diesels? Hardly, but the acceptance of diesels will increase to the point that light duty diesels may account for over 15 percent of the vehicles on the roads of America. In western Europe, diesels now make up 30+ percent of the vehicle population, with some experts predicting the percentage may rise as high as 50 percent in the next few years. Tax incentives for diesel-powered vehicles would hasten acceptance here, as they did in Europe. Clean, modern diesel technology could change the negative aura surrounding SUVs, for example.

Some old perceptions about diesels will die hard, especially in a country where gasoline has always been relatively inexpensive. Forward thinking people, however, have been quick to see the economic advantages of diesels, particularly in relation to our growing dependence on foreign oil and the instability of the world oil market. The potential 40+ percent fuel economy increase from diesels is hard to ignore. In response, diesel engineers have made huge progress in eliminating the problems associated with diesels. Here are examples:

MYTH #1
Diesel engines are smoky and dirty.

FACT
Diesel smoke is comprised of soot from unburned or partially burned fuel. Modern computerized fuel control and management coupled with ultra-high-pressure common rail fuel injection have virtually eliminated diesel smoke. What little smoke remains is nearly invisible, and even that trace smoke will be gone when the petroleum industry switches over to ultra low sulfur fuel, as mandated by the EPA by 2006. As for dirty, no smoke means no soot, and no soot means no dirt.

MYTH #2
Diesel exhaust smells bad.

FACT
The smell associated with diesel engines in the past came from incomplete combustion, smoke, and high sulfur content in diesel fuel. As mentioned above, electronic fuel management has dramatically improved combustion and nearly eliminated smoke. Today’s diesels won’t offend most folks, and when the sulfur goes, even those people with sensitive noses will be hard pressed to honestly object.

MYTH #3
Diesels have to be noisy, especially at idle.

FACT
There used to be a lot of truth to this statement, but new diesels with a feature called “pilot injection” have virtually eliminated the clattering sound associated with diesel engines. Many of these diesels are so quiet that it takes an educated ear to recognize that the engine is a diesel when it goes by or is stopped at a stoplight. Unfortunately, there are enough noisy older diesels on the road to sustain this myth for some time.

MYTH #4
Diesel are slow and sluggish.

FACT
All new automotive, light truck and motorhome diesel engines sold in America today are turbocharged. These turbo-diesels are responsive and powerful. They are capable of accelerating quickly, and they have high-torque output for climbing grades or sustained high-speed operation. Today’s turbo-diesels also are responsive to performance upgrades that make their performance nothing short of incredible. (see ”Project Sidewinder Goes to the Salt”)

The following are a few additional “tall tales” that occasionally arise:

MYTH #5
You should occasionally mix a gallon of gasoline with a tankful of diesel fuel to clean the fuel injectors and remove carbon from the cylinders.

FACT
Don’t do it! Gasoline, even in low concentrations, destroys the lubricity of diesel fuel and can quickly destroy the diesel’s expensive fuel injection pump. Gas in diesel fuel also increases the combustion temperature and can actually damage the expensive fuel injection nozzles. And lastly, today’s diesel fuel does not gum up fuel injectors, or build carbon deposit in the cylinders as was sometimes the case many years ago.
Don’t ever mix gasoline, or alcohol, with diesel fuel.

MYTH #6
You have to go to a truck stop to buy diesel fuel.

FACT
With the popularity of diesel pickup trucks and SUVs, more and more gasoline stations are now adding diesel fuel pumps. This trend will continue as diesel popularity grows. But, yes, you can buy diesel fuel at a truck stop if want to, and besides, you can buy great country music CDs while you’re there!

MYTH #7
You have to let a turbo-diesel idle for two minutes before you shut it off.

FACT
This is a current myth that has a basis of fact stemming from many years ago. It also has a kernel of truth regarding today’s turbocharged gasoline engines that operate at higher peak exhaust temperatures than turbo-diesels. In the early days of turbochargers, the turbo shaft was supported by a babbitt bearing that could seize, or even melt, if the engine was shut off immediately after sustained boost conditions where the turbocharger would “heat soak”. A two minute cool down at idle allowed the turbocharger to dissipate any remaining spinning inertia, and the oil circulation cooled the bearing and prevented oil “coking” in the bearing area. Turbochargers haven’t used babbitt bearings for over 30 years, and today’s oils resist coking. Synthetic oils won’t coke, period. With a turbocharged gas engine, it’s still good insurance to let the engine idle for 30 seconds to a minute to allow the turbo or turbos to dissipate any inertia and to cool the bearing area to prevent oil coking, especially if the engine has been worked hard just prior to shut-down. Of course, using quality synthetic oil eliminates this potential coking problem.

Today’s turbo-diesels are a different story. There is really no reason to “cool down” a turbo-diesel these days, but you won’t hurt anything by doing it either. You can still find people who swear you have to do it, but the myth is fading. Maybe they just like to sit and listen to the radio.

MYTH #8
You can’t use synthetic oil in a diesel.

FACT
Synthetic oils can be, and are, used in many diesel engines. Every engine manufacturer has specific oil recommendations, and as long as the synthetic oil meets the API rating recommended for that engine, it is acceptable. For most light-duty truck diesels, this means a minimum of API CF or CD. Some folks think synthetic oils will void the warranty on a turbo-diesel, but again, if the oil has the correct API rating, no problem. If you’re still in doubt, read your manufacturer’s warranty. It’s a contract between you and the manufacturer.

MYTH #9
Diesel fuel has less heat energy than gasoline.

FACT
Diesel fuel has almost 11 percent more heat energy than gasoline. A typical gallon of gasoline has about 124,800 BTU, whereas a typical gallon of #2 diesel has about 138,700 BTU.

MYTH #10
Diesels are hard to start in cold weather.

FACT
Diesel fuel is less volatile than gasoline, and wax crystals can begin to form in diesel fuel at lower temperatures, so it’s true that many diesels have starting problems in cold weather (below freezing temperatures). Happily, modern diesels with common rail injection and pilot injection have starting capabilities equal to gasoline engines at temperatures as cold as -40º F. Many diesels also feature fuel heaters to prevent wax crystal formation. The use of synthetic oils also helps diesels crank over in cold weather. This is just one more area where diesels have changed for the better.

MYTH #11
A diesel engine will run under water.

FACT
This isn’t completely a myth. Like any internal combustion engine, a diesel needs access to fresh air in order to run. It must also have water-free fuel and be able to easily expel exhaust gases. If these conditions are met, technically a diesel could run under water, assuming its fuel management computer and wiring harness is watertight, and some military vehicles with raised air intakes and exhausts can run under shallow water. On the other hand, it’s probably not a good idea to drive your diesel pickup through a river, pond, lake, creek, or the municipal swimming pool no matter how logical the idea seems at the time!
worm drowner is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 12-11-2007, 06:34 PM
Tebow-in'...
 
mudguppy's Avatar
 
Join Date: Dec 2008
Location: duncan, SC
Posts: 1,243
Points: 32,372
Thanks: 173
Thanked 142 Times in 105 Posts
Quote:
...Turbochargers haven’t used babbitt bearings for over 30 years... With a turbocharged gas engine, it’s still good insurance to let the engine idle ...to allow the turbo or turbos to dissipate any inertia and to cool the bearing area to prevent oil coking... Today’s turbo-diesels are a different story. There is really no reason to “cool down” a turbo-diesel these days...
yet, we still have plenty of people shelling out cash for Turbo Timers and the like...

Travis
---------------------------------------------------
2011 F350 SRW CC/SB 4x4 Lariat 6.7 PSD Dark Pearl Metalic

1974 Bob'd Deuce on 16.00-20 XZLs, locked front and rear, hydro steering, front and rear winches, 5.9CTD/nv4500, hydro-boosted disc brakes

Member since Jul 05, Dually Club Member #63, American Club Member #42, FOSP Member #8
mudguppy is offline  
post #3 of 11 (permalink) Old 12-11-2007, 08:02 PM
IS FREE!!!!!
 
Join Date: Mar 2006
Posts: 1,143
Points: 20,560
Thanks: 0
Thanked 5 Times in 5 Posts
Send a message via AIM to 6Lcummins Send a message via MSN to 6Lcummins Send a message via Yahoo to 6Lcummins
just more propaganda from the "god" of diesel.

12.56 @ 102 MPH Ennis Texas 4/10/10
11.55 @ 117 MPH Cedar Falls Iowa 5/22/10
1968 Cummins Corvette
All hard parts provided by Low Budget Diesel Performance and our sponsors Hamilton Cams, Pureflow Technologies, and PowerFlow Exhaust
6Lcummins is offline  
post #4 of 11 (permalink) Old 12-12-2007, 07:37 PM
 
Join Date: Dec 2007
Posts: 23
Points: 1,185
Thanks: 0
Thanked 0 Times in 0 Posts
interesting, I'll be sure to drive my truck into my swimming pool.
DarkSnake is offline  
post #5 of 11 (permalink) Old 12-12-2007, 08:12 PM
I like beer.
 
NukleusX's Avatar
 
Join Date: Dec 2008
Location: Capistrano Beach, CA
Posts: 4,301
Points: 44,168
Thanks: 249
Thanked 156 Times in 135 Posts
Send a message via AIM to NukleusX Send a message via Yahoo to NukleusX
Yeah. I still got a relatively 'older' truck with the 'older' style turbo, so hell yeah I am gonna let my truck cool down after I have been running it hard or even not so hard.

Thanks again Bank$ lol.

Jeremy
94 Ram 2500 4x4 RCLB.
Power: BHAF, 4" exhaust, S300G, 15.5*, 100 plate, 90 hp sticks, 191 dvs, Mike L. trans. more when i remember.
Appearance: 1 pc headlights, HIDs, 4.5" lift, flippy mirrors (up), not so chrome 6" silverline exhaust tip, not so fancy aftermarket wheels
American Club #33
Singles Club #74
TDG Mafia #111

http://www.socaldieseltrucks.com
NukleusX is offline  
post #6 of 11 (permalink) Old 12-12-2007, 11:56 PM
Senior Member
 
Superdutytd's Avatar
 
Join Date: Dec 2008
Location: Washington State
Posts: 2,126
Points: 30,318
Thanks: 28
Thanked 59 Times in 55 Posts
Images: 3
I'm gonna keep the turbo timer set to 390...

2008 Red CCSB 6.4 Auto Lariat.
Stock 20's wrapped in 35x12.50R20 Toyo MT's, 3.73 gears, Nav, Backup Cam, Tailgate step, Upfitters, etc.
Mods: AFE Intake, Line-X, 20% Tint, Clear Bra, Husky Mats, Smoked Recon Mirror markers/3rd brake light, Bushwacker Pocket style flares w/ mud flaps + an aluminum Rapid Hitch (one of the best investments!)
Feel free to PM with any questions about any of my mods.

SRW Club #55
American Club #55


Last road trip-567 miles @ 20.7 mpg @ 67mpg average speed.
Superdutytd is offline  
post #7 of 11 (permalink) Old 12-16-2007, 12:57 AM
Senior Member
 
Join Date: Jan 2007
Posts: 3,754
Points: 40,957
Thanks: 0
Thanked 4 Times in 4 Posts
Ill waste my money and let my truck cool down as well.

1996 Gmc k2500 4x4 6.5 turbo diesel, with mods Blew the head gasket, put all new heads, valves, injecotrs gaskets etc on the truck only to get it together and find out it had no oil pressure, and sounded horrible (pry a spun bearing). SOLD
2007 chevrolet 2500hd Duramax loaded. GM LEMON BUYBACK
2007 Chevrolet LBZ 1 ton crew cab 8ft box
on star, xm, tow mirrors, 145 amp alt,
#23 Singles Club
thejdman04 is offline  
post #8 of 11 (permalink) Old 12-16-2007, 01:37 AM
Senior Member
 
Join Date: Jan 2009
Posts: 1,409
Points: 4,885
Thanks: 34
Thanked 40 Times in 30 Posts
I must say that is the most amount of facts I've ever seen with the banks name on it.
mckey73 is offline  
post #9 of 11 (permalink) Old 12-16-2007, 04:28 PM
 
Join Date: Nov 2006
Posts: 281
Points: 6,031
Thanks: 0
Thanked 0 Times in 0 Posts
I like to listen to the radio...:Thumbup:
jethrow is offline  
post #10 of 11 (permalink) Old 12-16-2007, 08:22 PM
I like beer.
 
NukleusX's Avatar
 
Join Date: Dec 2008
Location: Capistrano Beach, CA
Posts: 4,301
Points: 44,168
Thanks: 249
Thanked 156 Times in 135 Posts
Send a message via AIM to NukleusX Send a message via Yahoo to NukleusX
Quote:
Originally Posted by Superdutytd
I'm gonna keep the turbo timer set to 390...
Aint 390 a little warm yet? I usually let mine get to low 300s if not 300.... :shrug:

Jeremy
94 Ram 2500 4x4 RCLB.
Power: BHAF, 4" exhaust, S300G, 15.5*, 100 plate, 90 hp sticks, 191 dvs, Mike L. trans. more when i remember.
Appearance: 1 pc headlights, HIDs, 4.5" lift, flippy mirrors (up), not so chrome 6" silverline exhaust tip, not so fancy aftermarket wheels
American Club #33
Singles Club #74
TDG Mafia #111

http://www.socaldieseltrucks.com
NukleusX is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Diesel Truck Forum - TheDieselGarage.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome