Engine Swap: SXT Plus V6 to a Mopar V8 - Dodge Challenger Forum: Challenger & SRT8 Forums
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post #1 of 8 (permalink) Old 03-10-2019, 04:47 AM Thread Starter
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Engine Swap: SXT Plus V6 to a Mopar V8

Hey y’all,
I recently came into possession of a Mopar V8 big block 383 (‘67 I think). Its a project and was gonna rebuild it and wanted to swap it with the stock 3.6L V6 on my 2015 Dodge Challenger SXT plus. Was wondering if anyone had any tips, recommended literature, or advice they can spare for me and/or if it’s even possible to do so.
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post #2 of 8 (permalink) Old 03-10-2019, 08:14 AM
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If you're asking if anyone has ever done this, the answer is no. If you're up for being the first person to do it, then go ahead but it will take a lot of time and effort for what has no objective value (i.e. only do it if it means something to you and is worth it..)


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post #3 of 8 (permalink) Old 03-10-2019, 08:35 AM
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Do a search, the topic comes up once in a while. As Hanan mentions, I have yet to hear anyone successfully performing the swap. Although, I do remember reading someone with a magnum perform a swap from a V6 to V8. If you have the means I would say go for it because I love it when people take on such challenges...like this guy one HP tuners who put a weiand on 300.

https://youtu.be/7p8ZqfafN28


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post #4 of 8 (permalink) Old 03-10-2019, 09:47 AM
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Before I went too far, I'd check with the emissions laws in your state. It might not be legal to do it and drive it on the street. I'm not saying it isn't, but it pays to check first.


I once thought about putting a 340 sb into a 71 Z car. I asked CARB and they sent me a detailed instruction list telling me exactly what I needed to do to keep it legal.


I think it would be far easier to swap a 5.7 than a motor with no electronic controls.


If you do it though, please post the whole thing here so we can see how it goes. Sounds pretty cool to me.

If you want to race, just drive 500 miles on a single tank first
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post #5 of 8 (permalink) Old 03-10-2019, 11:31 PM
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The 67 383 was rated 325hp? Gross. Net that's approx. 260. The torque though, the torque

The 2015 however has a million sensors, and all tied in to the PCM. I'd think you'd have to make a stand alone management system for the older engine, and figure out how to satisfy the original. And as mentioned, if you have any emissions testing there is no way, period.

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post #6 of 8 (permalink) Old 03-11-2019, 12:28 AM
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as stated, vehicle will be held to the 2015 V6 emission standard...no way your going to get an old bigblock mopar to run within that, less is totally nuetered down. then there is the 2 billion lines of electronics, the trans, engine mounts, cooling, driveline, power steering issues to overcome.. probably a billion other lil things, all of which will cost thousands of $$ to even try to work thru.
I cant imagine what the resulting "frankenchallenger" would look and drive like.

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post #7 of 8 (permalink) Old 03-11-2019, 01:06 AM
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honestly I would quicker build a new car around the old engine, and keep the SXT as a daily driver
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post #8 of 8 (permalink) Old 03-11-2019, 12:38 PM
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Quote:
Originally Posted by Americanmuscle345 View Post
honestly I would quicker build a new car around the old engine, and keep the SXT as a daily driver
I have to agree. You proposed swap would make the car illegal to operate on any road per EPA.

Go get a dynacorn body and have at it, since you can register it as a pre-emissions car.
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