A few questions on 5.7 swap

New Hemi Engine Swap

  1. rescuediver1982

    rescuediver1982 Well-Known Member

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    The factory wiring harness mods, can anyone give me a good step by step write up? I have searched FABO and FBBO pretty extensively and can't find anything easy to decifer... DIYhemi does have some good info... Also has anyone used the drive-by-cable throttle bodies from BBK instead of a bellcrank?

    Thanks,
    Jeremy
     
  2. usaroadrunner

    usaroadrunner Well-Known Member

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    Get a harness from Hotwire or modern muscle which has Hotwire harnesses. 1k everything labeled an easy to hook up.
     
  3. rescuediver1982

    rescuediver1982 Well-Known Member

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    I agree that would be the easiest... I am interested on what it takes to use the existing harness and potentially saving 1k...
     
  4. 5.7 hemi

    5.7 hemi FBBO Gold Member FBBO Gold Member

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    About 15 hours and a FSM for your year engine. How much is your time worth?
     
  5. kb67mopar

    kb67mopar Well-Known Member

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    If I could go back in time I'd probably try it myself. But I couldn't find the wiring pinouts I needed. In my case I say this because I'm now contemplating adding back in the speed sensor and cruise control inputs. If you find a manual please tell us where you found it.
     
  6. usaroadrunner

    usaroadrunner Well-Known Member

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    I totally agree with you but once we got the motor an trans in. We had the whole motor wired in about 30min and started it. I hated spending a grand but the aftermarket harness was just to easy, worth it in my book. Still a lot of money.
     
  7. Darius

    Darius FBBO Gold Member FBBO Gold Member

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    I had the entire harness from an 07 Charger in my 70 GTX. By the time we hacked into it enough to get it to even run, it was worse than a ball of spaghetti! So I took it all out and rewired the entire car. I had transmission problems ...computer related as I used the NAG1 and I was WAAYYYY ahead of any aftermarket products that make this much easier today. Bottom line is, there is a BUNCH of crap in that factory harness you won't ever need and you will spend more time sorting it out than you will just installing a new harness. This old saying is appropriate here.."Pay yourself now, or pay yourself again, later" .
     
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