Want to upgrade horsepower and torque

[Safetyguy69]

I own a 2015 2500 6.4l hemi (gas); just recently the engine blew, but thank god i bought the extended warranty. I'm fully covered and RAM is currently putting a new engine back in to my truck (it will be like a brand new truck). I've been asking the dealer, who can't give me a direct answer, but I'm wanting to increase hp and torque but they state modifications will void the new 3 year warranty on the new engine. Is there anything I can do that will not void the warranty?

 

[Dean2]

Nothing that will make a real difference.

 

[mtnrider]

No....

 

[CanuckRam1313]

I own a 2015 2500 6.4l hemi (gas); just recently the engine blew, but thank god i bought the extended warranty. I'm fully covered and RAM is currently putting a new engine back in to my truck (it will be like a brand new truck). I've been asking the dealer, who can't give me a direct answer, but I'm wanting to increase hp and torque but they state modifications will void the new 3 year warranty on the new engine. Is there anything I can do that will not void the warranty?

Leave it well alone and enjoy a brand new factory engine

What I would consider doing though is getting a transmission service (fluid & filter) while it's in for the new engine, and maybe the differentials and transfer case, too.

 

[Burla]

If you have the more popular 3.73 gear option, move those to 4.56 and it will give you all the wake up you need, likely better then anything you will do to the engine this side of turning into a drag truck. You have the rfe 6 speed? Plenty you can do there as well.

 

[CanuckRam1313]

If you have the more popular 3.73 gear option, move those to 4.56 and it will give you all the wake up you need, likely better then anything you will do to the engine this side of turning into a drag truck. You have the rfe 6 speed? Plenty you can do there as well.

^^^^^ THIS!!!!!!!!

 

[Burla]

^^^^^ THIS!!!!!!!!

Wheel torque or torque at the wheel versus engine torque... It will reduce top end, but everything else is pure monster! If you want to get better mileage, that is in the gas pedal, don't do 80mph where you used to, back it down. That's the trade off, you will need to tune the engine. Everything can be set back if there was an issue.


In essence, gearing itself does not change the engine's inherent torque or horsepower output. Those figures are measured at the engine's crankshaft.

However, gearing dramatically affects how that torque is delivered to the wheels and, consequently, the vehicle's performance. Here's how:

• Torque Multiplication: Lower gears (higher numerical gear ratio) reduce the rotational speed of the wheels relative to the engine's speed, but they proportionally increase the torque delivered to the wheels. This is why a vehicle can accelerate powerfully from a stop in first gear, even though the engine's maximum torque might be produced at higher RPMs. It's like using a longer lever – the same input force results in a greater output force, but with a shorter distance traveled.
• Speed and Torque Trade-off:Gears create a trade-off between speed and torque.
  • Higher gear ratios (lower numerical ratio) favor speed, allowing the vehicle to travel faster for a given engine RPM, but reduce the torque available at the wheels.
  • Lower gear ratios (higher numerical ratio) favor torque, increasing the pulling power but reducing the top speed in each gear.
• Optimal Engine Performance: Gearing helps keep the engine operating within its optimal powerband (the RPM range where it produces the most power and torque), even as the vehicle's speed changes. This allows the engine to deliver its best performance for different driving conditions, such as starting from a standstill, accelerating, or cruising.
• Final Drive Ratio: The final drive ratio, which is the gear ratio between the driveshaft and the axle shafts, also plays a significant role in determining how engine torque translates to the wheels. A more aggressive (higher numerical) final drive ratio increases wheel torque and acceleration but reduces top speed.

 

[Burla]

Can Gearing Make Your Car Faster? With Proof!

Test Results From Swapping Final Drive Ratios In My Honda S2000RaceLogic VBox Sport - http://amzn.to/2nPBBwXHow To Install A New Differential - https://youtu...

youtu.be

 

[Burla]

3/10'nths 0-60 or 10-60 whatever just by going from 4:10 to 4:44. and you would in theory going from a 3:73 to a 4:56. So how many HP would you need to gain approx 6 tenths at 0-60?

 

[CanuckRam1313]

Wheel torque or torque at the wheel versus engine torque... It will reduce top end, but everything else is pure monster! If you want to get better mileage, that is in the gas pedal, don't do 80mph where you used to, back it down. That's the trade off, you will need to tune the engine. Everything can be set back if there was an issue.


In essence, gearing itself does not change the engine's inherent torque or horsepower output. Those figures are measured at the engine's crankshaft.

However, gearing dramatically affects how that torque is delivered to the wheels and, consequently, the vehicle's performance. Here's how:

• Torque Multiplication: Lower gears (higher numerical gear ratio) reduce the rotational speed of the wheels relative to the engine's speed, but they proportionally increase the torque delivered to the wheels. This is why a vehicle can accelerate powerfully from a stop in first gear, even though the engine's maximum torque might be produced at higher RPMs. It's like using a longer lever – the same input force results in a greater output force, but with a shorter distance traveled.
• Speed and Torque Trade-off:Gears create a trade-off between speed and torque.
  • Higher gear ratios (lower numerical ratio) favor speed, allowing the vehicle to travel faster for a given engine RPM, but reduce the torque available at the wheels.
  • Lower gear ratios (higher numerical ratio) favor torque, increasing the pulling power but reducing the top speed in each gear.
• Optimal Engine Performance: Gearing helps keep the engine operating within its optimal powerband (the RPM range where it produces the most power and torque), even as the vehicle's speed changes. This allows the engine to deliver its best performance for different driving conditions, such as starting from a standstill, accelerating, or cruising.
• Final Drive Ratio: The final drive ratio, which is the gear ratio between the driveshaft and the axle shafts, also plays a significant role in determining how engine torque translates to the wheels. A more aggressive (higher numerical) final drive ratio increases wheel torque and acceleration but reduces top speed.

Agreed on these stats, and thanks for posting!

Going from 3.21's in my 19' to 3.92's in my 23' was night and day in terms of monster launch capabilities and holding the transmission at highway speeds with it not having to downshift to maintain said speed(s).

Sure I now go through a bit more fuel with the 3.92's but the smiles per gallon went WAYYYYY UP!

 

[Burla]

Agreed on these stats, and thanks for posting!

Going from 3.21's in my 19' to 3.92's in my 23' was night and day in terms of monster launch capabilities and holding the transmission at highway speeds with it not having to downshift to maintain said speed(s).

Sure I now go through a bit more fuel with the 3.92's but the smiles per gallon went WAYYYYY UP!

My buddy has 3.92 with 6 speed, I have 545 with 5 speed, just that difference night and day. He can toasty tires at any launch, I cant break traction unless it is raining. Worst part, he gets better mpg as well, like 30% better!

 

[Wild one]

My buddy has 3.92 with 6 speed, I have 545 with 5 speed, just that difference night and day. He can toasty tires at any launch, I cant break traction unless it is raining. Worst part, he gets better mpg as well, like 30% better!

Swapping the RFE out for the 8 speed is generally good for a 1/2 second in the 1/4 Mike,you need the 8 speed in your truck,lol.Way better torque multiplication in 1st gear,faster shifts and a better built transmission that'll take some abuse You'll blow the tires off with your 3.55's with the 8 speeds 4.71:1 first gearThe Euro guys are putting upwards of a 1,000hp through a stock 8HP70,i'm not sure how,but they're doing it,and the transmissions are living