3.8 to a 4.2 - Mustang Evolution

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Old 01-01-2013, 08:34 AM   #1
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3.8 to a 4.2

Hey guys quick question if I did a swap from a 3.8 to a 4.2 in my 03 Mustang, would I need a new computer for the 4.2? Thanks
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Old 01-01-2013, 08:41 AM   #2
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Quote:
Originally Posted by Matthew Jones View Post
Hey guys quick question if I did a swap from a 3.8 to a 4.2 in my 03 Mustang, would I need a new computer for the 4.2? Thanks
Yes, and alot of more parts
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Old 01-01-2013, 11:44 AM   #3
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Not necessarily new, just have the old one retuned
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Old 01-01-2013, 05:56 PM   #4
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No lol no new computer is required, it's a simple motor swap in deal and just run as is, a tune always helps of course but it is not necessary
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Old 01-01-2013, 06:54 PM   #5
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NO!
I re-used everything from 3.8 block and just dropped the 4.2 in it.
I didn't change anything except the flex plate and harmonic balance'r.
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