6.4L Hemi V8 Engine - The Specs & Differences Between the Ram Trucks and SRT/Performance Versions
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- Опубликовано: 14 июн 2024
- Today we are taking at look at Chrysler's 6.4L Hemi V8 engine with a major focus on the differences between the two variations offered. This engine has become a Mopar fan favorite over the past decade, found in performance-based vehicles like the Dodge Charger and Challenger Scat Pack, Chrysler 300 SRT8, Durango SRT, 392 and Jeep Grand Cherokee SRT. If you weren't aware, there's also a tweaked version of that engine found in the heavy duty Ram trucks.
To analyze these differences, we will look at all of the specs of each, like which engines go into which vehicles, the power output, MDS and transmission, engine block and rotating assembly, cylinder heads and camshaft specs, intake and exhaust manifolds, and more! Watch along for an in-depth look at the 392 Hemi V8!
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#Hemi #6.4LHemi #392Hemi #HemiTruckvsCar #6.4HemiDifferences 
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Super sick (and needed) continuation of the “expansion” of the 5.7 V8 HEMI! I was part of the developmental team for the 6.1 HEMI so seeing how that block has grown and continues to shine in American muscle……tears of joy 🔥🔥🔥🍻💯
You should be proud! I have a 2008 challenger first edition srt8 and the 6.1 is such a beautiful thing
@@thespicyyfella you have a Gem of a ride......take care of her !!
Question can I run 6.4 heads on a 6.1 block
The 6.4 is garbage. Just a 5.7 stroked and bored to its limits. Thank you for producing the 6.1 tho! One of the greatest engines ever
@@warmongerairsoft that bore n stroke process is what I was part of in the development of the 6.1. Thankfully it has proven to be a very reliable engine for those who own one 🍻
Need to make a correction: as many have stated, 2019 2500 and 3500 trucks used the ZF 8-speed automatic (8HP75R) with the 6.4. 4500 and 5500 still use the Aisin 6-speed.
The chassis cab SW 3500 get the 8 speed the 3500 4500 and 5500 hemis do not get an 6 speed asin i dont remember what it was but it was a six speed but it wasent an asin six speed
@@tylerschilling8742 it's the 66rfe
68rfe
I just recently got a Challenger T/A
It feels so old school.
I've driven camaros corvettes and mustang and its by far my favorite
I have a t/a and thinking about trading it for a camaro
@@mikaerler9692 I wouldn't personally. I can never see anything out the back of them (camaro) BUT that is your decision
@@maxxas5067 the neighbor of my girlfriend got a zl1 and i like the Front of it.
@@mikaerler9692 yea those things are scary fast.
I enjoy them as well
Great explanation of the differences between the 6.4 in various applications. Thanks.
Thanks dude. Got an 017 3500 with 392. Wasn’t sue about specs. Now you’ve delivered all of the goods. Great work.
I did not know that there was that much difference between the two. I thought if anything it would be tuned different and that’s it. I have a 2500 with the 6.4, and I love it.
I bought a brand new 392 Hemi long block from Mopar without MDS that was built Feb 2021 and can confirm that it does in fact come with the BGE engine block painted orange and T356 aluminum alloy cylinder heads and the new revised "hellcat" lifters. It’s a shame that it still has the same hyper-eutectic pistons and tightly gapped piston rings which means the engine cannot be safely boosted past 6-7 PSI without pulling and replacing the pistons.
Yeah bud that’s because the 392 is meant to be N/A it’s not meant to be boosted if u we’re looking for that u would get a Hellcat/6.2
What’s the benefit of the Hellcat lifters? I have a 2019 scat pack
@@demarcusbody9437 yeah but swapping in a 6.2 hemi into a SRT 392 hemi is not plug and play, it takes a lot more extra parts and a lot of extra work. Better to sell the 392 car and buy a factory Hellcat instead.
@@TheJMan1K from what I understand they are just revised lifters. Supposedly more durable than the previous part numbers used in pre 2017 MY engines. Those are the lifters that often end up failing and eating a cam lobe. There is no specific hellcat lifter though, should be the same lifter part number on all hemi engines including 5.7 6.4 and 6.2 from around 2017 an up. (Except automatic MDS equipped engines)
@@alexm.4621 yes that’s what I’m referring to buddy not a 6.2 engine swap that would be idiotic
As always super informative and very well put together videos 💪🏽😉
This was actually pretty helpful, I liked it👍
Thank you for this video, it's very cool to learn every aspect of this awesome engine. Mopar baby!!! 🤘🤘🤘
Very informative as always!
Great vlog. Love all the knowledge you share.
I waited my whole life for this video. Thank you ❤
Great video. You always have great information
Excellent video!!! Thanks for all of your research!
Very thorough. Good job! 👍🏻
For all the great information I learned a lot good work
Fun fact; if you want a 6.4 to build and boost you want the truck motor. 6.4 BGE pow
Why is that?
False
@@lofiseeker1790 Truck engine has a thicker block with lower compression which can typically handle more boost in stock form.
Love this channel!!!! Thank you!!
Thanks for the support 🙏🏼
Ugh I love these videos Marspeed!
Love this channel ❤️
Good video very informative!!!💯
Great video!!
Let me help you out a little. The ram 392 has the same displacement as the car, but that's all. The car has a slightly bigger bore than stroke. The truck has whats called an underbore. The bore is larger than the stroke. The ram has completely forged internals and revs slower. The truck version is raited lower power than the gm, but will out pull it. The gm has a big bore and short stroke. All of your torque is made low with a long stroke motor. The cummins is built the same way the truck 392 is built. There are guys that use the truck 392 as a hotshot. They're pulling 15k+ all the time and getting over 400k miles out of them. The truck is built heavier than any other gas motor on the market. The truck also has an oil and transmission cooler. The drive shaft is way larger. If you want a truck to last a lifetime but gas powered, get the 2500 ram.
Great stuff !!
I really like how rams have a 6.4 hemi great idea.
Yea but the power wagon weighs way too much. The weight to power ratio makes the engine feel like if its a 5.7 in the 1500
@@Mrhandyhitman You could get a 5.7L in a 2500HD back then. Imagine that dog with some weight on it.
@@dragoonTT right I’ve always thought that was a dumb idea from dodge
@@dragoonTT The 5.7 used to be good in those trucks but by todays standards it's trash which is why they ditched it. The 2500's with a 5.7 didn't weigh that much more than the half tons actually and the towing capacity isn't that much higher. They weighed only about 6000 lbs and they could tow about 13900 lbs. Not sure how they lost all that weight because a 2500 with a 6.4 is like 8000 lbs. A modern 1500 weighs about 6000 lbs and they can tow 12750 lbs.
@@gasolinediesel972 Hmm thanks for the info. I still wouldn’t touch a 3/4 ton with the 5.7L. Just not a huge gas fan in heavy duty frames when a diesel is available.
Thanks again for another outstanding video. August 2020 I knew I was going to buy a hot muscle car. It was a tossup between a Camaro SS2 and the Scat Pack. The Scat won out and I did buy one at end of Sept. 2020. But concerning the Hemi tick I wonder did I really make the right choice ? Did FCA make any changes to alleviate this tick, ruined cam issue in newer production engines ? I hate to think I made a $50K mistake.
I will add in 2019 the RAM 2500 got an heavy duty 8 speed transmission for serious upgrades to performance.
I would be planning on buying one my self soon.. keep me posted on modified.. I'm trying see hellcat or superstore hp...
There's actually more differences. There's the performance 6.4 in the regular vehicles, there's the truck version... but the 6.4 Hemi in the 2500/3500 is not the same as the ones in the commercial Heavy Duty cab chassis of the 4500 & 5500 trucks. The HP/TQ is detuned less than the pickups & the redline is also lower, approx 4600rpm. There are other slight changes. But the 6.4 in the pickups is not the same as the 4500/5500's
Those HD cab chassis trucks are detuned for longevity & Heavy loads & Heavy towing on a daily basis.
Love my 6.4
392 my fave dodge engine. Dope vid
Im currently putting a stroker kit in my 5.7, making my own 392.
Not worth the time
Great vid!!!!!!!!!!!!!!!!!
Quality content
I have given you a hard time before on some of your information and videos, this one is fantastic. Great job
Is there anyway I could maybe use some of the more high performance parts like the intake and exhaust manifolds of the 6.4 on the HD Ram? I test drove one recently it definitely feels heavy. I'm hoping to squeeze out at least 20-30 more Hp and torque if possible. I certainly feel like the truck needs it. I'm planning on ordering one of the big beasts but before that I'd like to know how to get more power NA before resorting to a low boost setup if there's any available. Thanks in advance.
Hoping that they have seriously improved the lifter and camshaft oiling system lately...
Just like the Chevy 454s cars and trucks had the same engine but were 2 main bolts as opposed to 4 main.
I can’t believe MOPAR hadn’t changed the firing order since the LA & Magnum engines. Wild!
Fantastic video! Thank you for doing it. One item of note, starting with the 2019 model year the HD trucks with the 6.4 now use an 8 speed ZF automatic transmission. The 6 speed (both versions) is only on the diesel now.
4500 and 5500 still run the aisin on the hemi and the cummins.
@@gasolinediesel972 did not know that. Thanks for the info. What I said is accurate for the 2500 & 3500.
@@johnnicpon5783 Correct, the 2500 and 3500 use the 8 speed. I guess they figured that the aisin would be better in the 4500's and 5500's. They thankfully no longer use the RFE transmission with the hemi.
So would a supercharger made for say 2017 ram 2500s fit a 2019+?
Any recommendations for a 2017 RAM 2500 6.4L mechanical guide manual?
I've got a 2016 Ram 2500 4x4 single cab long bed. Best truck over owned. Tows great and can drive just about anywhere with 37s. MDS delete and cam coming soon!
The need to add the 392 Hemi as a option. On the Limited and Limited Longhorn Models.
I have a question you or someone might could help with. If a 6.4 car or truck has a BG/BGE block dose it automatically come with the T356 heads.
Is the MDS active in track mode. I have a 2017 Jeep SRT.
I own a Charger Hellcat but drive a Ram 2500 sometimes for work (gov’t engineering takes you off the beaten trail sometimes lol). That truck 6.4L feels more torquey on the low end (compared to driving with the black key at least) and honestly I feel like I get better acceleration in the truck just cause I don’t spin out the rear wheels every time 😂. Both awesome engines!
Definitely want to fix that cam spec slide. The specs might be accurate, but the 2 cams shown were measured using different measurement methods. The car cam appears to be total duration (measured at "zero"-ish lift) and the truck cam appears to be the standard @ .050" lift measurement method. As you can see, it gives VERY different numbers and it's really misleading. They're likely much closer together, the truck cam is probably 265-270 degrees of duration measured the same way as the car cam.
Gotta love Chrysler
Can you do a video on the 2003 Dodge Viper SRT 10 ?
Forgot the Nag1 some are connected to!
But some good info!
Shit I totally forgot about that on the earlier models 😅 thanks for reminding me
DONT FORGET about the 2008 DODGE CHALLENGER SRT8, I've got 1078 in brilliant black,
LOVE MY CAR
Mds..ticking time bomb
The 2003 Ram 1500 slt sport is the first year they came out with the Hemi and with that truck if you go on the firewall where the main computers at you'll see four plugs go down to the third one you will see a dark green wire with a bright yellow strip cut that wire and that will disengage the rev limiter. Did it to mine and it was night and day difference until I rolled it over that way I went with the 2004 Ram and that when you needed to purchase a computer programmer never really had any problems with my trucks.
Nice
I have a 2004 Ram 1500 slt sport with the 5.7 hemi and I installed K&N air raid air filter Gibson exhaust stage 2 jet chip throttle body and Hypertech performance programmer and I've raced Mustangs not saying much but Imports and smoke them with ease. My 2001 Ram 2500 diesel that I want with Gale Banks almost on everything with the air intake 6in exhaust computer programmer Turbo plenty of power and torque actually pulled a tractor trailer Brad the guy decides to sleep in a parking lot that was just black top and sunk to the axles but of course with a little bit of his help pulled the truck out with ease. Waiting to see if I'm going with the 2021 Rebel or 22 Ram Rebel GT with the 6.4 hemi if it comes with one but looking for a new one.
Where are the ScatPack owners at🙋🏻♂️
My dad has one if that counts
My 21 2500 says 87 octane . Anybody have better mpg with 89 octane?
Thx
Newer Ram trucks with the 6.4L from 2019 and up have the ZF 8-speed.
Why did they drop the torque and horsepower from the crate engine
Additionally SRT engine has SRT embossed on Aluminium sump.
Incorrect about the transmissions. The 2019 - present 2500's and 3500's use the ZF 8HP75.
You can add the grand wagoner to the list now
This is Mike from California. I think you covered this on another video but wanted to ask you. How long should I let my 2013 challenger srt 8 run between oil changes. I think it's currently been about 4000 miles from my last oil change.
If it’s synthetic oil I’d change it every 5K miles or 1 year.
@@davidaaa6427 it is, it has the 6.4 Hemi. I'm currently using Pennzoil synthetic oil 0-40
@bitemyshinnymetalass1569 keep doing what youre doing
How can you tell the difference between a srt 6.4 and a truck 6.4 like some one selling you a truck 6.4 as a srt 6.4
Are the truck 6.4L cast iron block?
Could you do a video of the Viper v12 engine and the ram 2500 v12 engine?
They are V10's not V12's.
@@gasolinediesel972 well damn I'm dumb
The new 2022 RAM 1500 with the 5.7 HEMI has a different oil than the previous years. They now use a 0W-20. Is there a design change to the new HEMI? I wonder what the reason for a going to a lighter weight.
Emissions and fuel economy
Great content 👍 Thanks .
🇺🇲🇵🇷🦊👍
The truck version is the one ya want, if you're doing a replacement swap. Internally and block specs have it as basically a poor man's hellcat without the power adder. It uses the same head castings.
Does the 6.4 require premium fuel?
Do the 6.4 truck variants have the active intake runners like the 392s?
Good question but I think the truck does not have active runners. Honestly they probably use the same intake from the 5.7 which is why the truck version has the throttle body on top vs. the front and he said the runners on the truck were "tuned" for a specific RPM range instead of being variable like the car versions.
@@TonyTheTruckGuy So i could use a 6.4 truck intake on a 5.7 charger without major modification?
@@thedankgentlemann I can’t say with certainty since I have not personally tried, but it may be worth researching to see if anyone else has done. R/T life did a 6.4 car intake on his 5.7 Hemi but he had to get like an MSD box to control the runners. The truck intake MIGHT bolt right up. Not sure what kind of gains would be had though. The 6.4 truck intake could be the same as the 5.7 for all we know haha.
yesir
6.1 hemi is the best
Hi marspeed my brother is buy an charger, he is considering between Dodge Charger scat pack and scat pack wide body , should he spent more 5995 $ for the widebody or just take an normal scatpack
The Widebody adds:
Widebody of course
Six piston front brembos (instead of four piston)
20x11 inch wheels (instead of 20x9)
Flat bottom steering wheel
Bilstein adaptive damping suspension
Is it worth it? For $6k yes it is. If you don’t care about that stuff then no, but if you end up paying for that stuff later it will cost much much more
@@MarspeedCars thx bro
This is why if u know your going to be pulling something the 6.7 Cummins is definitely the better & cheaper option
Challenger didn't come out till 2008 and was only the 6.1 2011 is first year for the 6.4
Guy sounds like he’s suppose to tell me about the imperial star destroy inside and out
I have a pentastar v6 dodge durango and it has no upgrades and feels pretty snippy
I have the pentastar in my 2014 grand Cherokee and it is indeed pretty snippy
You two should try the factory lower manifold for the “Upgraded” Pentastars, my Dad and I swapped onto my 2012 with 3.6l along with MSD coil packs and it picked up a noticeable amount of power throughout the power band! Shocked the hell outta both Dad and myself when it felt stronger just easing away from the driveway, let alone won an open road where you can open it up.
@@GreenJeep1998 Very true! Did the same thing in my 300S except I used RIPP coil packs. Really woke up the performance across the power band. Very pleased!
@@aj_hlct6230 Those two mods and a RPM Motorsports resonator delete tube really woke up what wasn’t exactly a slow car to begin with. Fortunately, a couple weeks before those parts went on, we put better rear shocks and springs (dealer covered fronts under the extended warranty and were still good) as well as minivan rotors and calipers like your 300 has up front with matching stock size rear rotors and factory calipers with appropriately sized and matching semi-metallic pads all around. It’s like a different car with only a couple grand in parts and a few weekends of labor! Now Dad is talking about wanting to see if the rear brakes from his Grand Caravan would fit and hunting down better injectors to work with the E85 and a thicker, Avenger R/T and 200S rear sway bar to replace the bar that they put on the V6 Touring package cars like mine…….because if a noticeable improvement in go, whoa, and carving is good, even more is better, especially on something that almost looks like I bought it from a rental agency after it was retired 😅
Intake different with Shaker hood 🤔
What's the difference between the 392 and 392 scat pack
Nothing anymore, before it was a package that gave you bigger breaks ans adjustable suspension with wider tires, but that stopped after 2017 where you could get it on a scatpack
@@fknmonty Oh snap! You are going to set the SRT 392 crowd off! Blood will be spilled. Lol
Nowadays, just badging.
I took the mds off in my 5.7 i feel like mds wears out the engine faster
Funny the hemi got the same firing order as chevy engine
Do 3.6 v6 pentastar its also in all dodge ..chrysler ..fiat . Models
this engines are made in Mexico? Because Saltillo is a city located in north mexico
What if dodge made a truck version of the hellcat engine? Would that he very wasteful?
They already did it! 2021 Ram 1500 TRX 💨
@@MarspeedCars no for like for heavy duty work like the truck version of the 6.4 hemi. Tuned for towing and not for performance - offroad or not
@@blackice7408 @Marspeed answer the question!
@@MarspeedCars There is no huge difference between the TRX version and the car version
@@blackice7408 They’ll probably never throw a hellcat motor in the 2500 or 3500. Thats what the diesels are for.
They didn’t have the challenge mr till 2008 I was Chrysler full line certified back then I know for a fact because I got the dealership that I worked for there allocation by selling enoigh lx plate form cars by the dead line ever dealership got 2 per dodge point that’s why there is only 2800 of the original 2009 so it wasn’t 2006 there was the srt caliber in 2007 and there was a srt crossfire and ram and 300 and charger grand Cherokee that was the five there went no challenger back then and by then caliber was done as well as crossfire and the ram truck was gone
I have a 2011 SRT8, & I would have thought it would be a great motor for a truck, then I drove 2018 ambulances powered by one.
/beavis “This sucks more than anything has ever sucked before.” /s
7 1/2 tons, it’s struggles at highway speed, can’t find a gear it likes, the cam shaft had to be replaced in one, another bus had to have the Donk completely replaced, not entirely sure what went tits up on that one.
The truck hemi is a lousy terrible no good very bad motor if you’re doing anything more than using your lorry as a grocery getter and taxi.
I want to put a dodge hellcat engine on my 2004 Ford f150
Theres a lot of incorrect or mislead info in this video... :/
There was no Challenger till 2008 not 2006.
"maximum reliability" lol tell that to my failed mds lifter
RPMs = Revolutions per MinuteS lol
This guy's voice makes me want to nap.
I wish I could daily a 392. Gas is $1.54/L
ouch. Canada?
@@k3iler05 Yep
Stupid decision why USA doesn’t have the SRT 300.
Makes you double think a 6.4L truck swap
Truck engine takes more boost because it has stronger internals. If you plan to boost it then the truck motor is what you want.
@@gasolinediesel972 has there been anyone that’s actually boosted one of these to confirm or disprove that thought process. Currently looking into doing a Ls Vs 6.4L from a truck and would really like to no the answer to this. Or is it just a educated guess that it can take more boost
@@donaldsonjeoboham8759 Well if you want high horsepower then an ls as well as a truck 6.4 and an SRT 6.4 will all need stronger internals. But truck vs SRT, truck wins. The truck version doesn't have extensive testing but it's pretty safe to assume that it has stronger internals because I believe that originally they tried to use the SRT engine for the trucks but it had durability problems so they made a new version. The SRT engine was most likely bending or snapping rods. The truck version has stronger rods and pistons. I believe it is a very similar crankshaft, if not identical.
Maaaan ill be happy with just the 392 thats more than enough atleast for me
Very Odd. I Don't Know What's Correct Anymore. I Don't Want To Say What's Doesn't Line Up With What I Know Between The Truck 6.4 And Car 6.4 But It's Alot. Maybe FCAs Service Information Was Wrong But I'm Not Trying To Get Sued By FCA hahaha
The ram 1500 never got that 6.4L hemi because it will get poor fuel economy & decrease the towing & payload capacity & people are not going to buy it. That's what the ram 2500 & 3500 trucks are for with the 6.4L hemi. The 5.7L hemi V8 has alot of power & torque in the ram 1500, no need for a 6.4L hemi V8.
Great point, while it would be fun, most truck owners don’t buy the engine just for ripping around
@@MarspeedCars right people want reliability out their ram 1500. Also that 6.4L hemi was not in the dodge charger police pursuit cars.
Bore the truck version too 6.5L more torque 🎉