dakota hemi engine swap

[wigleym]

read somewhere that a 5.9 r/t tranny fits a 5.7 hemi engine. Anyone know what I would go through to put a hemi in my dakta r/t?

[Rebel13]

Alot of money and headache pills!

[caulk04]

The new HEMI engines don't use this tranny (46/44/42RE used behind the 5.9/5.2/3.9 respectively). They do, however, use the 5-45RFE which is also the same transmission used behind the 4.7L's.

If you are after something different and for the WOW factor of 'HEMI'...it can absolutely be done. Don't ask me though...cause I don't know how :jester:

Now, if you are after speed/power...go for a 408 stroker from John Mercedes and strap a blower to it. :beer:

[01SilverDak01]

The 6.1 Hemi has been successfully transplanted into a 92-96 Dakota RC 4X2 at KRC Performance, I'm not sure what it took, but this looks like a promising
Project........

http://www.krcperformance.com/newcontent/Hemikota.html

Maybe Marty could be of some help in figuring out just how difficult it would be to install a 5.7 hemi in a 97-04 Dakota Chassis.....

Personally, I think it'll be easier to Install a Built 408 with either a Turbo or Blower in your R/T!

[rt99three60]

why bother when you have a 5.9 in it the HEMI isnt all that its not even a real HEMI to me its a effin small block you can spend less and own hemi's i mean its not that hard to even beat them in the rams and they have them in cars like the charger that runs like high 13s thats not hard to get with an r/t just takes a lil bit of money.

[70Cuda383]

why bother when you have a 5.9 in it the HEMI isnt all that its not even a real HEMI to me its a effin small block you can spend less and own hemi's i mean its not that hard to even beat them in the rams and they have them in cars like the charger that runs like high 13s thats not hard to get with an r/t just takes a lil bit of money.


true, but the 5.7L hemi really takes to mods. I don't remember the article, but i think it was in mopar muscle, they took one and started messing with it, made incredible horsepower numbers by just simply playing with timing curves, air fuel mixtures, and some simple bolt ons. Somewhere I heard the heads, in stock form, flow enough air to support 500 hp.


the tricky part...or rather, the pain in your ass part, is breaking into the stock computer control system, since dodge is so super secret with their programing and for some reason, seems like they don't want people messing with it.

[rt99three60]

im just saying man its gonna cost him like 6,000 or more for the drivetrain and possibly all the other shit wiring computer then u have to get it to fit and to get that 500 hp u got to dump a few grand into the hemi not to mention get all the gauges working properly and such..... id rather just build up what i got u know

[70Cuda383]

oh absolutely! doing the hemi swap is going to cost some big bucks. dollar for dollar, I think building the 408 would be cheaper for the same horsepower, not to mention a bolt in deal, requireing no special mounts, or harnesses, etc.

The only reason I would do a 5.7 over building up a stroker small block, is for the wow factor.

same reason I'm building my 383 big block. my power goals are 450-500. I could have built a 408 stroker small block and come pretty darn close, then icould have saved a bunch of money and time on installation.

...but to open the hood and reveal a big block! wow!

[rt99three60]

numbers = wow to me though who cares if u have a 5.7 HEMI if it was a 426 id be like damn thats sweet

[TopCityDak]

couple other items for the wow factor on the small block front would be a 392 hemi or the less expensive and easier to find (of the 3 chrysler small block hemis) 331 hemi. if i remember correctly(misplaced my list of possible engines for the rambler) a 392 clone with 10.5:1 comp, dual quads flowing 1050 cfm puts up 325 hp and 400 lbft. another option for those that arent afraid of carbs lol

[70Cuda383]

couple other items for the wow factor on the small block front would be a 392 hemi or the less expensive and easier to find (of the 3 chrysler small block hemis) 331 hemi. if i remember correctly(misplaced my list of possible engines for the rambler) a 392 clone with 10.5:1 comp, dual quads flowing 1050 cfm puts up 325 hp and 400 lbft. another option for those that arent afraid of carbs lol


a 392 hemi with 10.5:1 should be able to make 1 hp per cubic inch, or 392 hp or more. they're good engines!

[MagnumDak]

The new HEMI engines don't use this tranny (46/44/42RE used behind the 5.9/5.2/3.9 respectively). They do, however, use the 5-45RFE which is also the same transmission used behind the 4.7L's.

Has anyone actually tried to bolt a 46RE to a hemi to see what lines up? The 727 fits both motors (hemi&360) with minor change.

[caulk04]

Not that I'm aware of...and it'd be a wiring nightmare because the 46RE requires a computer as 1st gear is electronic as I recall. I'm also not aware of any stand alone controllers for that either.

Money would be the only reason I can think of not upgrading to the 45/5-45RFE as its a better tranny.