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Old 02-26-2015, 04:14 PM   #29
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Originally Posted by miked11272 View Post
The ford 6.7 diesel is a twin turbo and only has 400hp in 2014 and before. The cummins has 385.
The ford 6.8 gas has 362. That is comparing turbocharged engine to a non turbo engine. If you five star tune the gas add about 50hp total.
you beat me to it...

take the turbo off the diesel and compare...

I remember , the non turbo 6.5 in the hummer.... holy smokes... thought I'd never get over baker grade out of vegas...
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Old 02-26-2015, 04:18 PM   #30
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Now you've got me thinking about getting my 1932 Chevy running again. It weighs 2,7xx lbs. with a 28 HP engine. So you see, the HP to weight ratio Don mentioned has been around a looong time.
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Old 02-26-2015, 04:42 PM   #31
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A DP and gas MH with identical weight and identical HP will climb a hill at exactly the same speed as long as the weight/HP/speed is the same. That is simple physics.

True as long as you hit the hill at speed but if you have to excelerate up the hill the DP will be long gone.
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Old 02-26-2015, 04:50 PM   #32
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True as long as you hit the hill at speed but if you have to excelerate up the hill the DP will be long gone.
no it won't...both taking off from a dead start, the gas coach will be so far ahead you won't be able to catch it with a cb radio
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Old 02-26-2015, 05:01 PM   #33
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I think most that own gasser's do not run them right to the floor wide open pulling a long hill, I pass most all of them with my little engine..........
Most all DP's are run full throttle, where they are the happiest......... gasser owners do not .....screaming at 5-6k........to do the same job.
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Old 02-26-2015, 05:31 PM   #34
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I think most that own gasser's do not run them right to the floor wide open pulling a long hill, I pass most all of them with my little engine..........
Most all DP's are run full throttle, where they are the happiest......... gasser owners do not .....screaming at 5-6k........to do the same job.
I have videos proving the opposite .. both diesel were 13&15 mph slower than the v10... v 10 was at 4000 rpm

now.. not claiming to know anything... but everyone keeps say'n a grasshopper can pull a plow.... I say lets see...

also I let all three do their thing floored in high gear , hit the same hill pulling the same trailer @ 70 mph...

ive since read that you should down shift and keep the rpms at red line on the pusher...
personaly I think that would hurt the trans shifting that hard on a hill full weight...
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Old 02-26-2015, 05:43 PM   #35
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I think most that own gasser's do not run them right to the floor wide open pulling a long hill, I pass most all of them with my little engine..........
Most all DP's are run full throttle, where they are the happiest......... gasser owners do not .....screaming at 5-6k........to do the same job.

I have added the five star tune and hardly ever tach over 3000 rpms. I can increase speed going up grades no problem. Pass what ever I need to and still get 9 miles per gallon.
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Old 02-26-2015, 05:45 PM   #36
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I have videos proving the opposite .. both diesel were 13&15 mph slower than the v10... v 10 was at 4000 rpm

now.. not claiming to know anything... but everyone keeps say'n a grasshopper can pull a plow.... I say lets see...

also I let all three do their thing floored in high gear , hit the same hill pulling the same trailer @ 70 mph...

ive since read that you should down shift and keep the rpms at red line on the pusher...
personaly I think that would hurt the trans shifting that hard on a hill full weight...
If you were to look "Allison Transmission" up in the dictionary............you would find two words that explains the name.......
"Bullet Proof"...... properly serviced, I don't even think about the Allison back there ..........even when towing my 10k trailer
Like I have posted before.........there is only one thing that separates the two(Gas/Diesel)..........one clue..........Its Green
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Old 02-26-2015, 05:53 PM   #37
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If you were to look "Allison Transmission" up in the dictionary............you would find two words that explains the name.......
"Bullet Proof"...... properly serviced, I don't even think about the Allison back there ..........even when towing my 10k trailer
Like I have posted before.........there is only one thing that separates the two(Gas/Diesel)..........one clue..........Its Green
lol... you read that on a truck stop wall.....lol
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Old 02-26-2015, 06:06 PM   #38
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It depends on if it has MAX INPUT TORQUE w/SEM OR TORQUE LIMITING1,2. SEM = engine controls with Shift Energy Management
4 SEM and torque limiting are required to obtain this rating


So the Allison MH2100 can support 340 HP and 700 LB-FT assuming it has SEM. The good news is the engine and transmission ECUs work together to do SEM. Most Engine ECUs can do this. Here is how it works:
HOW SEM WORKS

During shift operation, SEM begins when the transmission control module (TCM) electronically requests the engine’s electronic control unit (ECU) to momentarily reduce engine torque. The engine’s ECU acknowledges the command and cuts torque as requested.

As the shift is completed, the TCM requests the ECU to ramp engine torque back to the desired level. This process is completed quickly and seamlessly.

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Old 02-26-2015, 06:16 PM   #39
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Quote:
300hp-660 torque
Sounds like a CAT?

My Cummins has 350hp - 1,050 ft lb torque
GVWR 32,000lb
91.42 lb/HP
30.48 lb/1ft lb torque
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Old 02-26-2015, 06:19 PM   #40
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Sounds like a CAT?

My Cummins has 350hp - 1,050 ft lb torque
GVWR 32,000lb
91.42 lb/HP
30.48 lb/1ft lb torque
6.7ISB Cummins
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Old 02-26-2015, 07:28 PM   #41
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OT...
2 garden tractors...

One is 18 hp gas
Other is 16 hp diesel

Diesel one lots stronger than gas one.

Reason...

Diesel horses are larger than gas horses...

One is 1/4 horse and other is Clydesdale. ..
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Old 02-26-2015, 07:29 PM   #42
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I have had 2 gas, 2 diesel.
Both Ds would easily pass either G.
It wasn't the horsepower, it was the TORQUE!
I did not take any testosterone enhancements in the process of these tests.
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