Good Sam Club Open Roads Forum: Tow Vehicles: My have things changed
Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tow Vehicles

Open Roads Forum  >  Tow Vehicles

 > My have things changed

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 5  
Prev  |  Next
BenK

SF BayArea

Senior Member

Joined: 04/18/2002

View Profile



Posted: 04/07/20 12:39pm Link  |  Quote  |  Print  |  Notify Moderator

Gasoline has fewer BTU's per unit measure than diesel, so diesel will most always produce more power per gallon

ICE's at best, the last time checked, only utilize <50% of the energy potential a gallon of fuel consumed, so there is head room to improve both power and MPG

Science will continue to discover new laws of physics that will improve power and MPG

*ALL* crude graphs, reports, etc (to date) listing the end of supply has fine print..."known reserves"...and they are finding more reserves all the time...but it will end...just not as soon as they say...

Power has the bottom line of ultimate and actual PSI on the piston tops. Factored by the area of that piston top. Limiting factors are mainly with both material science and thermal dynamics. Toss in manufacturing science


-Ben Picture of my rig
1996 GMC SLT Suburban 3/4 ton K3500/7.4L/4:1/+150Kmiles orig owner...
1980 Chevy Silverado C10/long bed/"BUILT" 5.7L/3:73/1 ton helper springs/+329Kmiles, bought it from dad...
1998 Mazda B2500 (1/2 ton) pickup, 2nd owner...
Praise Dyno Brake equiped and all have "nose bleed" braking!
Previous trucks/offroaders: 40's Jeep restored in mid 60's / 69 DuneBuggy (approx +1K lb: VW pan/200hpCorvair: eng, cam, dual carb'w velocity stacks'n 18" runners, 4spd transaxle) made myself from ground up / 1970 Toyota FJ40 / 1973 K5 Blazer (2dr Tahoe, 1 ton axles front/rear, +255K miles when sold it)...
Sold the boat (looking for another): Trophy with twin 150's...
51 cylinders in household, what's yours?...

Groover

Pulaski, TN

Senior Member

Joined: 10/17/2007

View Profile


Offline
Posted: 04/07/20 01:39pm Link  |  Quote  |  Print  |  Notify Moderator

Diesels used to be adjusted so that they ran rich under heavy loads and smoked a lot. This did actually produce more power. With the better fuel mixing and added oxygen from a turbo they get more complete combustion for better efficiency. One of the selling points of turbos when they first came out was reduced fuel usage.

Turtle n Peeps

California

Senior Member

Joined: 06/23/2008

View Profile


Offline
Posted: 04/07/20 01:57pm Link  |  Quote  |  Print  |  Notify Moderator

BenK wrote:

Gasoline has fewer BTU's per unit measure than diesel, so diesel will most always produce more power per gallon


Nope. Not the way it works Ben. Nitomethane is the most commonly used powerful motor fuel ever. Look up how many BTU's it has.


~ Too many freaks & not enough circuses ~


"Life is not tried ~ it is merely survived ~ if you're standing
outside the fire"

"The best way to get a bad law repealed is to enforce it strictly."- Abraham Lincoln


ShinerBock

SATX

Senior Member

Joined: 02/22/2015

View Profile



Posted: 04/07/20 02:06pm Link  |  Quote  |  Print  |  Notify Moderator

valhalla360 wrote:



You are confusing the ability to generate more HP with fuel efficiency.


Sure a modern 3.0l turbo diesel can produce the power of a bigger NA diesel...but it uses pretty much the same fuel when both engines are producing identical power. As long as the engines are within normal operating ranges, power is largely a function of HP output.

As far as comparing to my brother-in-law, that was based on following him, so similar speeds and driving pattern. The trucks are within a couple hundred pounds. So no, being turbo doesn't automatically result in better efficiency.


And you are confusing how a gas engine operates with a diesel. Two different things. Gas engines have to stay within a certain air/fuel ratio(roughly 14.7:1 +/-3 parts air) meaning the more air you add, the more fuel you must add. Turbos do slightly improve a gas engine's thermal efficiency

Diesels can operate at a much wider air/fuel ratio from as low as 14.5:1 all the way up to 80:1 or even 100:1 depending on the engine. An N/A diesel does not have the ability to run that lean because it cannot suck enough air for the fuel being added as with any engine that operating at low rpms. Adding a turbo allows the engine to increase the amount of air to the same parts fuel making more power with the same amount of fuel. Turbos also increase a diesels thermal efficiency even more than a gas engine.

All three half ton 3.0L diesels don't just produce the same power as an old N/A HD diesel it exceeds it by at least 50 or hp and over 100 lb-ft all while using less fuel. Hell, even my 2.0 liter turbo diesel in my car makes more power and torque than the old Ford 6.9L and 7.3L N/A diesels.

I am not believing you on your brother in law story. So you are telling me that you two filled up and followed each other for a whole tank and refilled up again just to record each others mileage? And that a 2008(with emissions) truck weigh's within a couple hundred pounds of an old N/A engine truck? I am more surprised that you were actually were able to keep up with him in an old N/A diesel. I remember driving my grandfather's 185hp/338lb-ft 7.3L IDI, and it could even get out of its own way let alone keep up with a 350+hp/600+lb-ft 2008 turbo-diesel.

* This post was edited 04/07/20 03:20pm by ShinerBock *

jaycocamprs

Ringgold Georgia

Senior Member

Joined: 03/28/2004

View Profile





Offline
Posted: 04/07/20 06:37pm Link  |  Quote  |  Print  |  Notify Moderator

Turtle n Peeps wrote:

BenK wrote:

Gasoline has fewer BTU's per unit measure than diesel, so diesel will most always produce more power per gallon


Nope. Not the way it works Ben. Nitomethane is the most commonly used powerful motor fuel ever. Look up how many BTU's it has.


Yea but the nitro cars are burning close to 5 gallons of it, in a 1000 feet


2018 Silverado 3500 DRW
2011 Montana Mountaineer 285RLD


Cummins12V98

on the road

Senior Member

Joined: 06/03/2012

View Profile


Offline
Posted: 04/07/20 07:38pm Link  |  Quote  |  Print  |  Notify Moderator

jaycocamprs wrote:

Turtle n Peeps wrote:

BenK wrote:

Gasoline has fewer BTU's per unit measure than diesel, so diesel will most always produce more power per gallon


Nope. Not the way it works Ben. Nitomethane is the most commonly used powerful motor fuel ever. Look up how many BTU's it has.


Yea but the nitro cars are burning close to 5 gallons of it, in a 1000 feet


1,320’


2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
37,800# GCVWR "Towing Beast"

"HeavyWeight" B&W RVK3600

2016 MobileSuites 39TKSB3 highly "Elited" In the stable

2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD

ShinerBock

SATX

Senior Member

Joined: 02/22/2015

View Profile



Posted: 04/07/20 07:42pm Link  |  Quote  |  Print  |  Notify Moderator

The top fuel dragsters he is talking about only go 1000 ft, not a quarter mile.

Cummins12V98

on the road

Senior Member

Joined: 06/03/2012

View Profile


Offline
Posted: 04/07/20 08:12pm Link  |  Quote  |  Print  |  Notify Moderator

ShinerBock wrote:

The top fuel dragsters he is talking about only go 1000 ft, not a quarter mile.


Never heard of such a thing. Since when?

1320Fastback

Vista, Ca

Senior Member

Joined: 12/04/2016

View Profile


Offline
Posted: 04/07/20 08:22pm Link  |  Quote  |  Print  |  Notify Moderator

Cummins12V98 wrote:

ShinerBock wrote:

The top fuel dragsters he is talking about only go 1000 ft, not a quarter mile.


Never heard of such a thing. Since when?



Had to look it up as I did not know either but since July, 2008 after Scott Kalitta was killed.


1992 D250 Cummins 5psd
2005 Forest River T26 Toy Hauler


Turtle n Peeps

California

Senior Member

Joined: 06/23/2008

View Profile


Offline
Posted: 04/07/20 08:33pm Link  |  Quote  |  Print  |  Notify Moderator

jaycocamprs wrote:

Turtle n Peeps wrote:

BenK wrote:

Gasoline has fewer BTU's per unit measure than diesel, so diesel will most always produce more power per gallon


Nope. Not the way it works Ben. Nitomethane is the most commonly used powerful motor fuel ever. Look up how many BTU's it has.


Yea but the nitro cars are burning close to 5 gallons of it, in a 1000 feet


Nope. Try 13 to 15 gallons/ run.

And that's my point. It has so little BTU's/gallon it take a lot of fuel to make a run.

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 5  
Prev  |  Next

Open Roads Forum  >  Tow Vehicles

 > My have things changed
Search:   Advanced Search

Search only in Tow Vehicles


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2020 CWI, Inc. © 2020 Good Sam Enterprises, LLC. All Rights Reserved.