Engine swap
#11
09-05-2023, 10:51 AM
Yes you can, and it has been done successfully but it is involved. Engines are roughly the same family but the control systems have significant differences as well as using different transmissions (depending on year and whether RWD or AWD). Recommend searching LX Forum and Charger forum (not the Z one), there are write ups there.
#12
Yesterday, 06:41 PM
Engine swap yrs
LMAO......I will start out by saying that anything is possible with enough money and know how. If you are asking here then you definitely don't have at least one of those; Hopefully you have more of the other if your common sense doesn't take over.
So, the 4.7 was strictly a Ram and Jeep engine. It was never offered in an LX and with good reason; it would've been a heavier V8 that made less power than one of the available V6's. The standard (not counting the HO, because those are as rare as hen's teeth) 4.7 from 1999 to 2007 only made 235hp. The 3.5 V6 available in the LX platform made 250hp. I feel I should mention that upgrading from a 2.7 to a 3.5 is actually a viable swap and has been successfully done. In fact there is a 4.0 V6 of the same engine family that makes a bit more power than the 3.5 and is a bolt in when used with a few 3.5 parts. The 4.7 was upgraded for 2008-13 with more cam timing, compression, better heads and intake manifold, to the tune of 310hp in the Rams. Regardless of which one you would try to use, it was never meant to sit in an LX chassis. You'll need custom mounts most likely. The 4.7 was also never hooked to the only two transmissions offered in the LX, the 42RLE and the NAG1. The 42RLE was hooked to the 3.7 (4.7's baby bro) so you could bolt the trans to the engine, though it wouldn't last long from the higher torque of the V8. Since the the hemi was both hooked to the RFE and the NAG1, and the 4.7 was hooked to the RFE, logically a 4.7 should bolt to a NAG1. Problem is you don't have one, you have the weak 42RLE trans. This would require more custom wiring than you're already going to have because to run a NAG1 you need a TCM wired in (2.7 PCM does double duty for engine & trans). Your stock PCM is designed for a V6 in a CAN bus environment. The only CAN bus 4.7 installs were again, Jeeps and Rams but different bus speeds so you can't just integrate one of those PCM's into the car. Even worse with the 2008-13 4.7 because it has twin plug heads. The only way I could possibly see this working would be to convert the car to a hemi car PCM and TCM setup, then wire it to the engine and get a custom tune to DETUNE the stock parameters. By this point, you'd be better off swapping in a 5.7 hemi.
I have to ask, what led you to this idea? Have an 08 Magnum with a blown up 2.7 and someone offered you a 4.7 or you found one in a junkyard and though that might work?
So, the 4.7 was strictly a Ram and Jeep engine. It was never offered in an LX and with good reason; it would've been a heavier V8 that made less power than one of the available V6's. The standard (not counting the HO, because those are as rare as hen's teeth) 4.7 from 1999 to 2007 only made 235hp. The 3.5 V6 available in the LX platform made 250hp. I feel I should mention that upgrading from a 2.7 to a 3.5 is actually a viable swap and has been successfully done. In fact there is a 4.0 V6 of the same engine family that makes a bit more power than the 3.5 and is a bolt in when used with a few 3.5 parts. The 4.7 was upgraded for 2008-13 with more cam timing, compression, better heads and intake manifold, to the tune of 310hp in the Rams. Regardless of which one you would try to use, it was never meant to sit in an LX chassis. You'll need custom mounts most likely. The 4.7 was also never hooked to the only two transmissions offered in the LX, the 42RLE and the NAG1. The 42RLE was hooked to the 3.7 (4.7's baby bro) so you could bolt the trans to the engine, though it wouldn't last long from the higher torque of the V8. Since the the hemi was both hooked to the RFE and the NAG1, and the 4.7 was hooked to the RFE, logically a 4.7 should bolt to a NAG1. Problem is you don't have one, you have the weak 42RLE trans. This would require more custom wiring than you're already going to have because to run a NAG1 you need a TCM wired in (2.7 PCM does double duty for engine & trans). Your stock PCM is designed for a V6 in a CAN bus environment. The only CAN bus 4.7 installs were again, Jeeps and Rams but different bus speeds so you can't just integrate one of those PCM's into the car. Even worse with the 2008-13 4.7 because it has twin plug heads. The only way I could possibly see this working would be to convert the car to a hemi car PCM and TCM setup, then wire it to the engine and get a custom tune to DETUNE the stock parameters. By this point, you'd be better off swapping in a 5.7 hemi.
I have to ask, what led you to this idea? Have an 08 Magnum with a blown up 2.7 and someone offered you a 4.7 or you found one in a junkyard and though that might work?
#13
Yesterday, 06:47 PM