Hemi engine swaps?

"Scary__goongala!" (corymagee) 07/14/2015 at 19:31 • Filed to: None

1

34

Why are there not more Hemi engine swaps into cars from other manufacturers? Meanwhile the LS/ Coyote swaps are obviously extremely popular. Are they more expensive, less reliable, more complicated? Typhons for your time because it doesn’t relate to my question at all.

Cherry_man1 > Scary__goongala! 07/14/2015 at 19:34

4

They are MUCH MUCH Larger then a Coyote or LS

Scary__goongala! > Cherry_man1 07/14/2015 at 19:36

0

Any reason for that or is it just inefficient design?

StoneCold > Scary__goongala! 07/14/2015 at 19:43

1

Most Hemi engines fall under the ‘Big Block’ designation, with oversquare displacement and thick cylinder walls to handle the EXPLOSIONS.

Bman76 (no it doesn't need a WS6 hood) M. Arch > Scary__goongala! 07/14/2015 at 19:47

0

A modern Hemi shouldn’t be bigger than a Coyote (since cam in block). They tend to be more expensive for less power.

Also, Hellcat swapped Sagaris. Think about the madness!

lone_liberal > Scary__goongala! 07/14/2015 at 19:48

2

This is just a guess but the LS is a very compact engine for its displacement so it fits in a lot of engine bays and given that GM sold more cars and trucks with them than Chrysler did the Hemi they would be ubiquitous in the junkyards. There are also more classic GM cars out there that are getting swaps put in them than their Mopar counterparts. Then you get to the matter of aftermarket support, which GM has a ton of.

StoneCold > Scary__goongala! 07/14/2015 at 19:49

1

Most of the time it’s just cost. Coyotes are ~$9000, LS3s are ~$8000, Hemis are.... ~$7,000?

What?! This is news to me:

http://www.moparproshop.com/gen_3_engines

Milky > Scary__goongala! 07/14/2015 at 19:51

0

I’d wager they’ll become more popular when the ‘05+ charger/chrysler/cherokee/ram’s become dirt cheap and fill junk yards. The “Hemi for pennies article” can't exist just yet.

Scary__goongala! > Bman76 (no it doesn't need a WS6 hood) M. Arch 07/14/2015 at 19:58

2

Hellcat swapped Sagaris would be disgustingly awesome and deadly.

Cherry_man1 > Scary__goongala! 07/14/2015 at 19:58

1

Because of what StoneCold said they are mostly Big Blocks. while some are 5.7L the 392 is a big block and the hellcat is as well.

they are just massive.

Scary__goongala! > Milky 07/14/2015 at 19:59

0

Figured availablity was not a problem with the number of models that got them.

Bman76 (no it doesn't need a WS6 hood) M. Arch > Scary__goongala! 07/14/2015 at 20:00

2

Full on Hannibal Lecter.

Twism > Scary__goongala! 07/14/2015 at 20:09

0

They are rarer, but they are starting to pop up.

Mopar Muscle did a nice article on how to find a good one (03 and up in trucks, 05+ in LXs):

http://www.hotrod.com/how-to/engine/…

JGrabowMSt > Scary__goongala! 07/14/2015 at 20:12

4

Built HEMI engines are more for drag than street use. Once you really squeeze all the power out of them, theyre not very streetable, where an LS is pretty easy to tune for street use, a good tuner will get a HEMI running well, but most shops that dont typically work on HEMIs will be a bit lost. More of a Dodge problem, parts departments are often not super nice when you look for odd things.

Ive seen a few HEMI swapped cars, but I think its cost. Theres an FFR 33 hot rod with a HEMI, the Blasphemi, and Ive seen a few other random ones, but its certainly just not often thought of. Owning a Magnum, I would totally swap a new HEMI into something. Power, gas mileage and simplicity is a great balance, the blocks are heavy though...LS and Coyote blocks are aluminum, and generally much lighter...

Textured Soy Protein > Scary__goongala! 07/14/2015 at 20:13

1

I have a Hemi Grand Cherokee.

The Hemi has dual spark plugs per cylinder, and the replacement procedure is a pain.

Also speaking very generally, it gets worse mileage than GM LS motors with similar power. There are full-size GM SUVs and trucks with LS motors that are way heavier than my Jeep but get way better mileage.

(I picked the Jeep knowing full well that this was the case but I was enchanted by Quadra-Drive II 4wd with its 3 electronic LSDs. I tolerate the shitty mileage because it’s my winter car.)

So if you’re swapping a motor into your car, and choosing between an LSx and Hemi, why would you pick the one that needs twice as many spark plugs and gets worse mileage?

Connqr > Bman76 (no it doesn't need a WS6 hood) M. Arch 07/14/2015 at 20:15

0

Scary__goongala! > Cherry_man1 07/14/2015 at 20:21

0

Gotcha, I kinda thought it was because they were just bigger.

DoYouEvenShift > Scary__goongala! 07/14/2015 at 20:22

1

My guess, is they are not as easy to come by/cheap as LS engines. Transmission choices are probably a bit more limited. Last I heard you had to run an aftermarket computer, which adds to the cost. Unless theres tuning software out, I haven’t looked into it in a while. They are a tad bigger than LS as well.

Having said all that, I love new Hemis. All pushrod engines really. I think an awesome swap would be a BMW 3 series with a 5.7 and call it the 357 Magnum.

Honestly, I haven’t seen many Coyote swaps either.

Scary__goongala! > Textured Soy Protein 07/14/2015 at 20:23

0

Yeah that makes sense. The dual spark plugs sure sounds like a pain in the ass.

Mercedes Streeter > StoneCold 07/14/2015 at 20:28

1

20k for a Hellcat engine?

...So that’s like...$36k for a Hellcat smart car?

Mercedes Streeter > Scary__goongala! 07/14/2015 at 20:35

0

That’s a car in which would kill you simply by turning the ignition key...

Mercedes Streeter > Textured Soy Protein 07/14/2015 at 20:35

0

Because HELLCAT!!!

TheOnelectronic > Mercedes Streeter 07/14/2015 at 20:45

1

I don’t even know if that would work, and I don’t care. It needs to happen. Can you imagine the donuts with such a short wheelbase? Hell, forget the donuts, can you imagine the SICK WHEELIES!?

Firewrx234 > Scary__goongala! 07/14/2015 at 20:47

2

I think you’d be safer walking into one of these:

Mercedes Streeter > TheOnelectronic 07/14/2015 at 20:47

0

It would only work in the forfour...unless you plan on sitting on the beast that will murder you. :)

DoYouEvenShift > Scary__goongala! 07/14/2015 at 20:55

0

New Hemi next to old Hemi

Some random pics for reference

DoYouEvenShift > Cherry_man1 07/14/2015 at 21:07

0

I may be wrong, but Im pretty sure all New Hemis are the same physically. Its just bore and stroke that changes. Just like an LS.

boxrocket > Scary__goongala! 07/14/2015 at 21:14

1

Because Viper swap sounds cooler/ballsier.

Nibbles > Scary__goongala! 07/14/2015 at 21:29

0

HEMI big, yeah yeah yeah!

They're not small, no no no!

415s30 W123TSXWaggoIIIIIIo ( •_•))°) > Scary__goongala! 07/14/2015 at 22:02

0

The LS is just good, compact, light and plenty of options.

Conan > Scary__goongala! 07/14/2015 at 23:35

0

Too big. I have a vehicle that one would even be a company appropriate swap for... but it just won’t fit.

Nauraushaun > Scary__goongala! 07/15/2015 at 05:38

0

Oh gooood that Typhon goddam

RutRut > Scary__goongala! 07/15/2015 at 08:15

0

I’ve heard the ECM is tougher to work with as far as reflash, getting through seed and key security, recal’ing for more performance, etc. No experience on it, only work with GM controllers and mostly E78 at that.

Scary__goongala! > RutRut 07/15/2015 at 08:19

0

Never thought about the computer being part of the problem. Interesting

RutRut > Scary__goongala! 07/15/2015 at 08:33

0

Most swaps just carry over the ECM but you still have to worry about the rest, TCM if necessary, body control modules for cluster and ancillaries, brake control modules can interact with the ECM. GM has their own CAN messaging system just like everyone else and their own software sets, the aftermarket is pretty familiar with GM’s software and CAN bus so it makes swaps easy and tuning easy.