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New Hemi Swap data

70chall440

70chall440

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I apologize if this has already been done but I have not seen anything like this. What I propose is a listing of information that members can look at to get some information about this swap. There are a lot of individual builds but it can get a little confusing if you are just looking for raw data. What I ask is that members cut and past the below line items and fill in the data in order to provide a "snapshot" of your car/build. If you want to add line items or comments to the list, please feel free as it may be helpful to someone else. Perhaps if this is popular it can be made a sticky to ease the search for information. Please if possible try and make your information stand out by not making it bold, changing the font, underlining it, etc.

  • Car new hemi was put in (make, model, year):
  • New gen hemi size:
  • New gen hemi year:
  • What did the new gen hemi come out of or was designed for (car/truck):
  • Carb or EFI (type, brand, etc):
  • What intake was used:
  • What exhaust manifolds/headers were used:
  • Modifications made to the new gen hemi:
  • Type ignition used:
  • What PCM was used:
  • What harness was used:
  • What front serpentine system was used:
  • What alternator was used:
  • What PS pump was used:
  • What motor mounts were used:
  • Transmission used behind hemi:
  • If manual, what clutch was used:
  • What transmission mount was used:
  • What adapters were needed to get the trans to mate/work:
  • What modifications were required to the car to make the hemi fit/work:
  • Biggest challenge/problem encountered and how it was resolved or overcome:
  • What would you have done differently:
  • How do you like it:
 
If the lord meant a real mopar to have EFI it would have been born with it.

Old schooler here.
 
FI is they way to go. You can’t fire up and drive away in car with a carb when it’s really cold or go from low elevation to high elevations and have any trouble with carb equipped vehicle.
 
5.7 hemi said:
FI is they way to go. You can’t fire up and drive away in car with a carb when it’s really cold or go from low elevation to high elevations and have any trouble with carb equipped vehicle.
Click to expand...

Well I am not sure I agree with that overall, I think if you drive the vehicle frequently and use decent fuel I think you can drive it just like we did back in the day. The problem is that most of us do not drive these cars as everyday drivers and thus have issues. Put another way, people drove carbureted cars every day, drove across the country all the time back in the day; hell some still do. FI cars do have advantages no doubt but each to his own; I don't hate on carburetors or cars with them, I just don't want to deal with them anymore but some people have no issues with them and prefer them and thats their right. I grew up driving cars with them and working on them, but once I made the change to EFI I would never go back unless it was a very original or rare car.
 
I hear ya, but then we had really good gas, not so today.
 
I am a bit surprised no one with a 5.7 swap hasn't posted the data yet, I'd really like to see some.
 
I did a 5.7 Hemi 545rfe into my 64 Polara 500.

late model hemi into early b bodies
 
03’ truck. Was t-boned, 17k on both the engine/trans. I could set a glass of water on the intake and it wouldn’t shake, dead smooth!
 
5.7 hemi said:
03’ truck. Was t-boned, 17k on both the engine/trans. I could set a glass of water on the intake and it wouldn’t shake, dead smooth!
Click to expand...

Thanks, I appreciate it. I am looking to go this route and I am wondering if there are any years/models that should be avoided or if they are about the same.
 
The early models had valve seat problems, but it was really more to do with over heating and there was also issues of just dropping a seat and ya got new engine if still in warranty.

I didn’t know about that, as it was pretty new to trucks/cars.

If you do a 5.7 swap, look for one that has Eagle heads, they flow a metric **** ton of air, I think those were standard starting 08 or 09.

Also the lifters tend to eat themselves or the cam eats itself, what came first, the chicken or the egg?

If ya decide to look for a block, get a 6.1, they have oil piston squirters, forge crank/rods/pistons. The heads on a 6.1 flow very well also, so either Eagles or stock 6.1 heads. The 6.1 intake flows, all aluminum, looks bitchin but does get very hot. So look for a car intake, way cooler, but not really eye candy.

Tuning, find an 05 computer, easiest to tune, or Holley has a good setup too.
 
Good information, thanks. I am probably going with either something out of a wrecked vehicle or a new rebuild. I am not looking for anything real high speed, just something that runs and is reliable.
 
5.7 hemi said:
FI is they way to go. You can’t fire up and drive away in car with a carb when it’s really cold or go from low elevation to high elevations and have any trouble with carb equipped vehicle.
Click to expand...
When is it really cold? When am I going to drive in high elevations?
 
California may not be a problem, bet NY would be.
 
  • Car new hemi was put in (make, model, year): 1968 Dodge Charger
  • New gen hemi size: 6.1L
  • New gen hemi year: 2008
  • What did the new gen hemi come out of or was designed for (car/truck): LX
  • Carb or EFI (type, brand, etc): Stock EFI
  • What intake was used: Stock 6.L
  • What exhaust manifolds/headers were used: TTI Headers
  • Modifications made to the new gen hemi: None
  • Type ignition used: Stock
  • What PCM was used: Converting to MS3X
  • What harness was used: Custom
  • What front serpentine system was used: Stock 6.1L
  • What alternator was used: Stock 6.1L
  • What PS pump was used: Stock 6.1L
  • What motor mounts were used: TTI adapter plates & Stock rubbers
  • Transmission used behind hemi: Viper T-56
  • If manual, what clutch was used: Centerforce
  • What transmission mount was used: Genertic GM style
  • What adapters were needed to get the trans to mate/work: SBM to T-56 Bell
  • What modifications were required to the car to make the hemi fit/work:
Floor pan modifications for T-56, torsion bar crossmember modified, custom trans crossmember, 45* oil filter adapter, trim steering gear box mount for A/C compressor clearance, PTFE fuel lines, EFI ready fuel tank.

  • Biggest challenge/problem encountered and how it was resolved or overcome:
Biggest challenge was doing this almost 10 years ago before much aftermarket support. Factory PCM never ran correctly - which is why I am now rewiring the Hemi for the MS3X to have better tuning control for boost and E85 in the future
  • What would you have done differently: Would have done a stroker kit, but wasnt in the budget at the time.
  • How do you like it: The engine never ran great with the old PCM but with excellent power, manual trans, and good economy it should be quite the fun car when it's tuned.
 
Outstanding!!! Thank you so much for taking the time to post your information. Hopefully others will follow suit and post their information as well, I think this is very beneficial to anyone considering this swap.
 
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