2025 Ram trucks

[Snobdds]

No. Because the same would be true for naturally aspirated trucks, too.
A 6cyl NA truck makes more torque at low RPM than a V-8
A 6cyl turbo diesel truck would make more torque at low RPM than a turbo diesel V-8.


Can’t wait for someone to sho a picture of a diesel v-8 with turbos. There’s like 10 of them left in the USA.

I thought NA trucks needed RPM to generate their torque?

 

[Engineer42]

No. Because the same would be true for naturally aspirated trucks, too.
A 6cyl NA truck makes more torque at low RPM than a V-8
A 6cyl turbo diesel truck would make more torque at low RPM than a turbo diesel V-8.


Can’t wait for someone to sho a picture of a diesel v-8 with turbos. There’s like 10 of them left in the USA.

Sorry, I had to.

 

[Hay Dude]

I thought NA trucks needed RPM to generate their torque?

NA gas V-8 trucks, yes. They take more RPM to generate torque.
Turbo gas trucks, in line 6 trucks, or diesel trucks (turbo or NA), not as much.

I don’t include diesel v-8 trucks because they have become irrelevant in the North American market for 98% of all applications.

 

[Hay Dude]

Sorry, I had to.

I love a 50 year old V-8 diesel as much as anyone, but they are non existent in anything the average guy runs or operates in the USA

 

[Engineer42]

I love a 50 year old V-8 diesel as much as anyone, but they are non existent in anything the average guy runs or operates in the USA

True, but ya gotta love a 903.

 

[Topzide]

Hey you two, you both have tractors, are the inline or v's? I think that should answer a lot of the issues. Been proven time and again the you get the most power at a lower rpm from an inline, turbo or not.
I know the between my 6.7 diesel and my 5.9 gas trucks, I'd rather do the work with the 6.7. And that's towing the same exact load!

 

[Snobdds]

Hey you two, you both have tractors, are the online or v's? I think that should answer a lot of the issues. Been proven time and again the you get the most power at a lower rpm from an inline, turbo or not.
I know the between my 6.7 diesel and my 5.9 gas trucks, I'd rather do the work with the 6.7. And that's towing the same exact load!

We went over this above already...

 

[dieselscout80]

Like I said earlier...It's the turbos that do that.

Straight six's are more efficient about getting the exhaust to spool the turbo than a V8. The down side to that is a straight six is spooled out faster than a V8, meaning a straight 6 runs out of air well before a V8. The top end of a straight 6 is lower than a V8.

So, which one is better?

Also this is a debate the Hay man and I have had for years. He was chumming the waters for me.

No it’s the long stroke of the straight six including the naturally aspirated (non turbo/ no blower), but the turbo can increase it if the boost comes in at a low enough RPM.

 

[dodge man]

Aren’t the Fords and GM diesels still V8’s with turbos? Unless your talking 18 wheelers I’d think they make up a significant amount if the market.

 

[Blue Mule]

I think we just discovered off idle torque is a function of turbo efficiency through the RPM band.

You seem to be hung up on the turbo. Turbo chargers need RPM to produce airflow which in turn produces power. So no, the turbo has nothing to do with the fact that a diesel engine makes amazing torque just off idle. "Off idle" means what it says...just off idle, i.e. just above the point where the engine is idling. At those RPMs the turbo is doing very little.

 

[BlueKnife]

Trust me, the Rams (not “Dodge” for almost 15 years) are capable of towing far more than what they are rated for.
Ask me how I know….

An F-150 is a toy to me, so how they tow is of no consequence.

Certainly lots of pickups that have towed more than they're rated for. Believe me, I've done plenty. The fact remains, however, that manufacturers cannot keep increasing tow ratings with each new generation indefinitely. At some point, they'll have reached (or exceeded) the maximum that a vehicle of a given weight can safely tow. I believe that, in general, they are at that point now.

 

[sandman2234]

Certainly lots of pickups that have towed more than they're rated for. Believe me, I've done plenty. The fact remains, however, that manufacturers cannot keep increasing tow ratings with each new generation indefinitely. At some point, they'll have reached (or exceeded) the maximum that a vehicle of a given weight can safely tow. I believe that, in general, they are at that point now.

Nah, they can still go a little further, cause DOT is over 80,000 (my truck is 80,450) with an APU. Just have to make them a little heavier to handle that kind of weight!
David from jax

 

[BlueKnife]

Nah, they can still go a little further, cause DOT is over 80,000 (my truck is 80,450) with an APU. Just have to make them a little heavier to handle that kind of weight!
David from jax

I'm not following. What is an APU?

 

[sandman2234]

I'm not following. What is an APU?

Auxiliary Power Unit. Trying to get truck owners to pony up for them, as they burn a gallon of fuel a night instead of a gallon an hour when running compared to the big engine up front.
To get more favor towards them, Lawmakers and the DOT gives an allowance for them in case drivers are overweight.
David from jax

 

[BlueKnife]

Auxiliary Power Unit. Trying to get truck owners to pony up for them, as they burn a gallon of fuel a night instead of a gallon an hour when running compared to the big engine up front.
To get more favor towards them, Lawmakers and the DOT gives an allowance for them in case drivers are overweight.
David from jax

Ok. While interesting, that isn't really relevant. We're talking about light trucks, under 19,000 GVW.

 

[nisaacs]

There are 3 variants of the trans for pickups/CC (Hemi/Diesel)

Ram 2500/3500 Pickup
Transmission: ZF TorqueFlite HD 8AP1075 — Automatic Eight-Speed
Availability: 6.7-liter I-6 Cummins turbo diesel

Description:

• Adaptive electronic control, automatic or Electronic Range Select (ERS) manual control
• Five clutch-pack design with only two open clutches in any gear
• Torque converter lock with turbine torsional damper for low lock-up speeds in 1st through 8th gear

Gear Ratios:

• 1st: 4.71
• 2nd: 3.14
• 3rd: 2.10
• 4th: 1.67
• 5th: 1.29
• 6th: 1.00
• 7th: 0.84
• 8th: 0.67
• Reverse: 3.30

Axle Gear Ratio: 3.42


Ram Chassis Cab -

Transmission: ZF 8AP430 TorqueFlite HD — Automatic Eight-Speed
Availability: 6.4-liter HEMI V-8

Description:

• Adaptive electronic control, automatic or Electronic Range Select (ERS) manual control
• Five clutch-pack design with only two open clutches in any gear
• Torque converter lock with turbine torsional damper for low lock-up speeds in 1st through 8th gear

Gear Ratios:

• 1st: 4.89
• 2nd: 3.12
• 3rd: 2.03
• 4th: 1.64
• 5th: 1.27
• 6th: 1.00
• 7th: 0.84
• 8th: 0.67
• Reverse: 3.30

Axle Ratios:

• 3.42 (3500)
• 4.44 (4500 and 5500)

Transmission: ZF 8AP850 TorqueFlite HD — Automatic Eight-Speed
Availability: 6.7-liter I-6 Cummins turbo diesel

Description:

• Adaptive electronic control, automatic or Electronic Range Select (ERS) manual control
• Five clutch-pack design with only two open clutches in any gear
• Torque converter lock with turbine torsional damper for low lock-up speeds in 1st through 8th gear

Gear Ratios:

• 1st: 4.89
• 2nd: 3.12
• 3rd: 2.03
• 4th: 1.64
• 5th: 1.27
• 6th: 1.00
• 7th: 0.83
• 8th: 0.64
• Reverse: 4.25

Axle Ratios:

• 4.10 (3500)
• 4.44 (4500 and 5500)

 

[Hay Dude]

4.89 rears are replaced by 4.44. That makes sense.

 

[sandman2234]

Ok. While interesting, that isn't really relevant. We're talking about light trucks, under 19,000 GVW.

Call them what you want, today's pickups are a long way from my first pickup, a Chevy 3124 series truck.
Making heavier duty pickup trucks is just done to appease the buyers, and bumping up the tow ratings has been happening for years!
David from jax

 

[Hay Dude]

Call them what you want, today's pickups are a long way from my first pickup, a Chevy 3124 series truck.
Making heavier duty pickup trucks is just done to appease the buyers, and bumping up the tow ratings has been happening for years!
David from jax

I applaud most of what I see. The regulations forcing emissions that are not realistic without excessive cost and shorter engine life are problematic. This should have been perfected by now. After 13 years, you’d think there would be a simpler, more durable emissions reduction system.

I really like that I can go down the road 45,000lbs + and then park in my garage or run to the supply store and park alongside cars in a truck that’s just a bit bigger than a pickup.
No, it won’t last as long as my bigger air braked trucks doing that, but I’m on 5 years of it and there’s no signs of any problems…..yet….

 

[BlueKnife]

Call them what you want, today's pickups are a long way from my first pickup, a Chevy 3124 series truck.
Making heavier duty pickup trucks is just done to appease the buyers, and bumping up the tow ratings has been happening for years!
David from jax

Yes it has, and again, they can't keep doing that forever. Eventually, either the truck is no longer a pickup sized vehicle, or they reach the maximum that a vehicle of that size can tow. Are you suggesting that they can keep raising tow rating indefinitely? So some day, we'll have half ton pickups that can tow 30K lbs, or 50K, or 100K? Sounds ridiculous, no? There is a top end, somewhere.