6.4 Hemi what is possible???

[Seppelrator]

I'm new to those trucks and just bought a 2016 Power Wagon. Now I'm trying to find out what is possible with those engines and also how much the transmission can handle?
I want to add power step by step. Coming from a supercharged Shelby GT500 I just miss the power from the supercharger. A supercharger and or turbo will be the end goal so I wanna get all the supportive mods in first.

Thanks guys

[NickTF]

I can't even find concrete info on what cylinder head is on these motors. If you want to do the things you're discussing prepare to be some what of a pioneer.

[loveracing1988]

I'm new to those trucks and just bought a 2016 Power Wagon. Now I'm trying to find out what is possible with those engines and also how much the transmission can handle?
I want to add power step by step. Coming from a supercharged Shelby GT500 I just miss the power from the supercharger. A supercharger and or turbo will be the end goal so I wanna get all the supportive mods in first.

Thanks guys

Best guess is the motor can handle the power but the trans won't like it. I would look into swapping a 68rfe in vs the stock 66rfe. Same ratios but more clutches to build the power from the Cummins.

[NickTF]

I'm new to those trucks and just bought a 2016 Power Wagon. Now I'm trying to find out what is possible with those engines and also how much the transmission can handle?
I want to add power step by step. Coming from a supercharged Shelby GT500 I just miss the power from the supercharger. A supercharger and or turbo will be the end goal so I wanna get all the supportive mods in first.

Thanks guys

Best guess is the motor can handle the power but the trans won't like it. I would look into swapping a 68rfe in vs the stock 66rfe. Same ratios but more clutches to build the power from the Cummins.

I would suggest paying close attention to the difference in materials/weight between the transmission internals if that option is considered. I recall the 47re including parts which must be swapped out by the tractor pull guys due to their intended rpm range because the diesel 47re was not capable of the rpms in excess of 4500 frequently. My gut feeling is the stock 66rfe can be built to take the abuse you're looking to put it through that would be the initial path of investigation I'd suggest.

[Will]

A quick look on shophemi.com says you can boost it to 6psi but no more unless you strengthen the bottom end. After bumping the engine, I'd say run until the tranny lets go and then rebuild whatever breaks stronger than it was. http://www.shophemi.com/p-2562-2013-64l ... mance.aspx Or http://www.shophemi.com/p-2580-arringto ... ckage.aspx

[Reloaderguy]

The 6.4L truck motor is relatively unsupported in the aftermarket. There is a few odds and ends like CAI's but very little in the way of performance parts. Even the 1500 5.7 guys struggle with bolt-ons, and very few delve into superchargers.

I had a supercharger on a 5.9L Magnum and it was a huge pain in the ass. The aftermarket heavily favors the LS and the variety of Ford motors. When I looked into this a year ago I came to the conclusion I would need to build an entire motor because the Hemi does not lend itself to blowers in stock form (pistons mainly) and then make a custom blower mount.

Frankly, if you want big power in your truck you may as well sell your PW and buy a Chevy.

[Reloaderguy]

A quick look on shophemi.com says you can boost it to 6psi but no more unless you strengthen the bottom end. After bumping the engine, I'd say run until the tranny lets go and then rebuild whatever breaks stronger than it was. http://www.shophemi.com/p-2562-2013-64l ... mance.aspx Or http://www.shophemi.com/p-2580-arringto ... ckage.aspx

I was under the impression the 6.4L in the 2500 was not the same as the 6.4L in the Charger and Jeep.

[NickTF]

The ls platform is hard to beat for bang for the buck and the amount of support that's out there. One of my closest friends built a carb'd 440" lsx with good cylinder heads, a hydraulic roller, and pump gas ~11.5 to 1 compression that pushed his 68 3300lb Camaro to 9.85 at 139mph with an awful 1.4 short time and no where near enough converter. No juice just straight pump gas n/a. If you're main concern is power and you aren't fort knox rich I'd listen to the above suggestion.

[MoparToYou]

Frankly, if you want big power in your truck you may as well sell your PW and buy a Chevy.

If he wanted big power, the Cummins comes from the factory with over double the torque of the 6.4 Hemi. Maybe he should have went diesel instead of Chevy. Just saying.

[Luke Duke]

I seem to recall that the truck motor CAN take challenger/charger parts. I understood the difference between the motors is the durability. Oil jets on the piston skirts, maximized oil circulation system, maximized cooling circuit. There are very few bolt-on parts out there and the real power comes from tearing the engine down and going from the ground up. It's no wonder though, when you look at the power generated by a naturally aspirated pushrod motor with an expected lifespan of ~200k miles the hemis are phenomenal motors and a great value.

[Seppelrator]

Yes I'm really surprised that there's almost no aftermarket support at all so a lot would be custom made.
I definitely would not go over 8PSI on a stock engine but then it all depends on the supporting mods as well.
With headers and free flowing exhaust and a good cam I'm sure one could make a lot of power already.
Who is the best tuner for Hemi engines out there?

[Bill2014]

Yes I'm really surprised that there's almost no aftermarket support at all so a lot would be custom made.
I definitely would not go over 8PSI on a stock engine but then it all depends on the supporting mods as well.
With headers and free flowing exhaust and a good cam I'm sure one could make a lot of power already.
Who is the best tuner for Hemi engines out there?

For the 6.4 hemi hd I would go with the Diablo inTune I2 I2010-DCX. If you are willing to push you components a little harder, add a Hemifever custom tune.