chargerrt340
Well-Known Member
Regardless of which engine I decide on I will try and stay with the original auto 727 or Dodge transmissions, and have the computer flashed for a manual transmission.
5.7 or 6.? in a 73 charger
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451Mopar
Well-Known Member
Keep an eye out on E-Bay for 6.1L Hemi. I scored a 50K mile 2008 Magnum SRT8 6.1L Hemi with NAG1 transmission, all engine accessories, exhaust, wiring, and computer for $4,000. The auction showed a buy me price (I think $6,000) with a make an offer, so I offered $4,000 and it was accepted. I missed out on a really low mileage 6.1L with 6-speed a year ago. I think it sold for under $6,000. I like the idea of the five speed automatic, but it makes the swap alot harder, mostly because of all the electronics the transmission needs (including a stock type shifter.)
The 6.1 is a better performance engine than the 5.7, but there are alot more 5.7 engines for sale fairly cheap. I don't know much about the MDS (good or bad) when used for this type of swap.
The 6.1 is a better performance engine than the 5.7, but there are alot more 5.7 engines for sale fairly cheap. I don't know much about the MDS (good or bad) when used for this type of swap.
chargerrt340
Well-Known Member
What is the benefit of the NAG1? Don't you have to modify the tunnel? Instead of the new transmission I was going to find a stock one and build it to handle the horsepower.
451Mopar
Well-Known Member
It is just the 5-speed overdrive automatic that came with the engine. No real benefit over other overdrive transmissions, it was just the stock one from the SRT.
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For the money your spending on a new Gen III why not look into a Hemi. A Real Gen II will cost 14,500.00 then you have something to o look at plus the shear torque of this motor will run circles around the Gen II which is not even close to a Hemi.
chargerrt340
Well-Known Member
Back on to the original topic of 5.7 or 6.?, I am thinking I am going to replace the front-end with aftermarket coil over shocks, and have the 5.7 / 6.1 mounts put on. I will keep my eyes open for a good price on either engine. Using a good transmission shop I will build the trans and match it with a 3.55 rear.
As soon as I get started I will start a new thread with pictures of the process along the way.
Good conversation guys
As soon as I get started I will start a new thread with pictures of the process along the way.
Good conversation guys
kb67mopar
Well-Known Member
No disrespect to the Elephant engine here but why? Why spend $14k on an engine? You can get a junkyard 5.7 block for $500-1000 needing a rebuild, stroke it, fuel inject it and make 450-650 hp on less $$ and have less weight up front. In all honesty the majesty of the beast is in its looks and no longer in its HP numbers.
chargerrt340
Well-Known Member
And you will get / why not enjoy better MPG. . . .
Darius
Well-Known Member
The Nag1 behind a 5.7 or6.whaterver will require a stand alone tcm and ecm dont thibk it is as easy as a straight swap over and NO , you cannot just reflash the stock ecm.
Do some reading in the other threads in this forum and save yourself a LOT of time MONEY and frustration!
Do some reading in the other threads in this forum and save yourself a LOT of time MONEY and frustration!
lxmodguy
Gen3 Hemi Guru
I can tell you for a fact that I can built a gen 3 426 for far less money than a old school hemi, it will make more power and be more reliable. Now if you built a 528 or some monster stroke motor you might make more...for WAY more money and with FAR less reliability. You can make 700+ out of a gen3 426 and drive it anywhere.
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