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Discussion Starter #1
So im not sure if anyone has asked this yet but has anyone done an engine swap from the sn95 v6 to the new 2011 3.7 liter v6? Seems like it would be a lot better than putting in the old 5.0 like most people do, its putting out a fair amount more hp than the old v8, gets better gas mileage, and is pretty damn light. Just wondering if it is at all feasable?
 

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What are your goals? What is your budget?

How much of the work do you want to do yourself? How good is your electrical? What are your plans for engine management (this motor is normally a drive by wire set up)? What are your plans for a transmission (remember that the current V6 transmission will not bolt up to a modular motor).

Short answer, is most anything can be put into anything given enough resources.
 
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It is possible but, 99% of the build is going to be custom fabrication.

If some crazy guy can put a V12 or LS1 into a Mazda Miata, you can put a 3.7 into an SN95 chassis.

It all depends on how deep your pockets are.
 

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If you need to ask if it can be done then you can't do it. You can pay someone to do it but that would be a waste of money. If you want the motor it would be cheaper to buy the car that comes with it.

I'm not trying to be harsh, but there is little need to discuss this.
 

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Discussion Starter #5
ok so i don't think you guys got the question. i was not claiming i was going to do it, i was asking if it was possible and if anyone has done it. I'm not dumb enough to go ripping out my engine without knowing what I'm doing first. The reason i wanted to know is because it seems like it would be a good way to have a light balanced car with a good amount of horsepower without adding things like turbos and nitrous that bring along a whole host of additional problems. I was asking what would be required for something like this purely for informational purposes.
 

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Discussion Starter #6
and as for buying the car it comes with, what made me think of this swap was when i was at Watkins Glen a few months ago at a HPDE. some of the cars their were absolutely gorgeous ford gt, nissan 370z, race prepped nissan gtr, corvettes out the ass and a few porsches and i was thinking that having a cheap ass sn95 body that u can beat the **** out of with a reliable unmodded engine that is high horsepower yet handles well would be far more financially sound plan rather than what all those guys are doing, besides u have more fun if ur not worried about scratching up your brand new z06.
 

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I was trying to get you to think it through for yourself.

Where would the motor come from (crate or salvage)?

Fuel injection or carb?

What would you use for engine management?

What is your budget?

IMO, the thing with some engine swap thread/quesiton is in the real world most ppl don't have unlimited budgets. So what is the motivation for someone to stick 2011 V6 into an old V6 Mustang?

Is it to be cool on a budget? (IE, the car is cheap. Spend the $$ on the Motor).

I would guess that 90% of ppl considering a swap such as this are thinking.

Why don't you see ppl doing this swap? Because it's no longer cheap when:

  • Can't re-use the existing transmission.
  • Can't buy a stand alone engine management system. Have to fab your own.
  • Difficult to fit a PCM from late model car into an older car and still have the rest of the car "work".
  • Lack of aftermarket parts. For example, who's making a carb intake for a 2011 V6?
I just don't see that the result would be worth the huge amount of effort. There's a reason why most ppl will use an "old 5.0" when actually doing a swap like this. It's easier if something close to what the car came with can be installed.
 

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Discussion Starter #8
Thank you for ur reply and advice, i understand what u are saying about if it was cheap people would be doing it. and as for me coming up with the answers by my self i have tried but i have little knowledge of mechanics unfortunately, i am only 20 and have basically gotten my car knowledge from google as my dad doesnt like to share his knowledge lol. That is why i ask these questions because usually you can learn more about something by asking a question to people with experience than u can sifting thru the internet and peicing it together urself.
 

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The swap would for sure be cool, but insanely expensive. Want a sleeper? Boost the V6, do a V8 swap, or put V6 exterior parts on a GT. And there's plenty of those "old" 5.0s with well over 100k on the odo and putting more power to the tires than the 3.7 makes at the flywheel. Lots of aother ares besides engine where you can reduce weight.

That being said, I'm sure it's a short matter of time before we see a 3.7 swap in a magazine. I'd bet that it will he the shop car (tax deductible) of a performance shop looking to get exposure.
 

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I've been thinking about doing it. Just need to wait on the money to allow it :)
 

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One thing most of the "dreamer/swap" guys never consider is that you need CASH to do it all...something the average working Joe has little of...now:

it could be done, you would need the motor, the wiring harness, the ecu and the accessories, then you need a T45 transmsission: (it's basically a mod motor at heart), then you would need a fuel system/tank, cooling and probably a gazillion little parts not to mention having to upgrade the suspension, brakes and rear end to handle the new power, then hopefully it would start and run...by the time you spent the $20K to do all this you would have a 412hp 16 year old car
Wouldn't it make more sense to sell the V6 and put the $20K+ down on a 2011 5.0 and have a small payment?
 
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How about you read the thread before you post?
He made no mention of the new 5.0
He is asking about the 3.7L.
 

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3.8 to 3.7 swap

I've seen engine, tranny, ecu and harnes for $5k.

so with that I can see you would need to get the motor and tranny mounts custom made.
then connect power, and fuel.

then what about controls like connecting up the throttle, and clutch.

There there is the accessories, power stering, A/C etc...
 

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Just wondering if for $5k you are getting the PCM from a stock 2011 with the motor?

If so, I don't think that everyone is fully aware of what it will take to put a 2011 PCM into an older Mustang. Some of the differences that come to mind.

  • The 2005+ uses a "smart buss" power distribution. The buss and PCM communicate with each other.
  • the 2005+ is "drive by wire"
  • Some model use an electric power steering pump with load sensors to the PCM.
  • the 2005 PCM makes greater use of the CAN communication network. This is to reduce the amount of wiring needed through out the car. The PCM is going to expect to talk to the sensors via CAN.
  • The SN95 body wiring harness won't have the same set of wires from the PCM to the motor harnes.
  • The 2005+ uses the 5R55S transmission. The PCM will expect to see an OSS sensor as well as a turbine speed sensor. So don't think an 4R70W can be used insted
  • The 2005+ uses variable cam timing. More signal wires that won't be in the body harness.
  • What about anti-theft (PATS). Different system than used in the SN95. The cluster and PCM exchange information.

With the differences in wiring, maybe consider getting the entire BODY wiring harness instead of the PCM, Motor, and transmission.

So for $5k you get a ticket into the show. But it's only the start of the trip.

Consider what kind of a Supercharger kit could be purchased for $5k. The average weekend mechanic could install the KIT in a weekend. The result would likely have more HP. But IMO most importantly, you would be DRIVING your project instead of looking at a box of parts and plans.

I seriously recommend that you get the wiring diagrams from a 2000 model year and compare to the 2011 model year. If interested in getting a set for yourself I maybe able to help. PM if interested.

Bottom line, the project is possible and it will make a great build thread. Good luck.
 

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OK, if you want to put a 2011-2014 Mustang 3.7L V6 into a SN95, it will fit, but their are a lot if issues. Basically, since the 5.0L Coyote fits, the 3.7L V6 will as well.

First, you need to decide what trans mission you want to use. 6R80 auto or the 2011-2014 manual trans. Because the rear face of block (RFB) is unique to this engine (and the 3.5L Ecoboost) you trans choices are limited. I understand you can buy an aftermarket bellhousing to adapt to a T5 as well. (5.0L Coyote uses same RFB as all Mod motors, so trans choice is not an issue.)

The only control system you can use is the Ford Factory PCM and wiring found in the 2011-2014 Mustang if you want to use the 6R80. It is a very complex system and you will need to have the PATS key as well as the 2011-2014 Mustang instrument cluster as that is where the PATS module resides. (Ford Racing sells a Controls PAK for the 5.0L Coyote, but not the 3.7L V6.)

There is no power steering pump on the 3.7L, it uses Electric Steering. Aftermarket sells pump and mounts for the the 5.0L Coyote, but not so for the 3.7L V6.)

Can it be done? You bet! Will it be easy or affordable? No. When you get done, you could have likely bought a used 2011 Mustang V6 for the same price.

Sorry, it would make a fast fun SN95 with some great gas miles, way better than the old 3.8L V6!
 

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OK, it has been over one year, so here is some updated info.

HP Tuners can now turn off the PATS system in 2011-2014 Ford PCMs, so this greatly simplifies your wiring system and you now do not haved to use the 2011-2014 instrument cluster as part of your swap kit. (PATS is in the cluster on 2011-2014 mustangs).

AJE Racing now sells motor mounts for the 3.7L V6 that allow you to bolt-in the engine when you use the AJE Racing K-member.

All the other issues raised above still need to be overcome. I highly recommend that anyone attempting such a swap start with a wrecked 2011-2014 mustang that runs and lot-drives so that you have a powertrain that you know runs and you have every 2011-2014 part you need to transplant that powertrain into another vehicle.
 
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