v6 to 4v swap - Forums at Modded Mustangs
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post #1 of 58 Old September 25th, 2013, 10:52 PM Thread Starter
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v6 to 4v swap

3 months ago my loyal 3.8 had blown a head gasket. After letting it sit around for most of the summer I fixed it and it ran well until a couple weeks ago. I was driving home from my gf's house and decided to "stretch my legs" a little only to hear a symphony of terrible, heart wrenching sounds shortly after. After limping the car home and leaving a long trail of oil through the neighborhood, I discovered that my beloved had thrown a rod and punched a big ass hole through my oil pan. Fed up with pouring money into the 3.8 just to keep it running and knowing that I would have to pull the motor anyway, I decided to man up and finally go for a v8 swap like I had always wanted to do. Initially I had been sold on doing a basic 2v swap but then I found a guy an hour away from me with a 97 cobra who wanted to swap an LS motor in. Thanks to the fact that he was a cool ass dude, no longer needed most of the engine related parts and didn't want to go through the hassle of parting it all out. I scored a working 97 dohc 4.6 minus the intake and exhaust manifolds along with a bunch of extras needed for the swap for $800. Thus here we are. I don't know how long this swap is going to take but I plan on documenting my progress as I go. I know there's a ton of guys who browse through this site who have a lot more knowledge and experience than I do so feel free to add any input, help, or advice. It would all be greatly appreciated.
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post #2 of 58 Old September 25th, 2013, 11:00 PM Thread Starter
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Idk why all the pictures I upload from my iphone are coming up sideways. Ill try to sort that out. Ive been working 9-5 so I havent had a lot of time to dedicate to the car but I managed to disconnect most of the hoses/wiring along with my Mac longtubes which I will be putting up for sale shortly. I also bought a T45 and exedy mach 400 stg 2 clutch kit today from Matticus91. Hopefully i can go pick that up sunday or monday while I'm off work. Now i just need a driveshaft and a flywheel and I'll have all the basics since I was midway through prepping an 8.8 rear to swap into my car before the engine went.
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post #3 of 58 Old September 27th, 2013, 09:36 PM Thread Starter
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pulled the engine and transmission out today after I got home from work
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99 3.8 v6 undergoing 97 dohc 4.6 heart surgery https://www.moddedmustangs.com/forums...6-4v-swap.html
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post #4 of 58 Old September 29th, 2013, 05:17 PM
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Nice buy! I will definitely be fallowing. Did the guy throw in the harnesses?
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post #5 of 58 Old September 29th, 2013, 08:36 PM Thread Starter
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Quote:
Nice buy! I will definitely be fallowing. Did the guy throw in the harnesses?
yea he hooked me up with the engine harness, trans harnes, and one other set which I have yet to identify but I noticed it has a plastic gear on it.

as far as what I did today, I picked up the t45 and exedy stg 2 clutch kit today. swapped out the radiator/fan once I got home and began to line up the engine and trans harnesses just so I could have a good idea of how things should look
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99 3.8 v6 undergoing 97 dohc 4.6 heart surgery https://www.moddedmustangs.com/forums...6-4v-swap.html
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post #6 of 58 Old September 29th, 2013, 10:47 PM
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Is the t45 beefed up at all? Also, are you doing anything to the motor while it is out?
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post #7 of 58 Old September 30th, 2013, 01:22 PM Thread Starter
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nope stock t45 and at the moment im just focused on getting it into the car and running so the most im thinking about right now is bolt ons.

99 3.8 v6 undergoing 97 dohc 4.6 heart surgery https://www.moddedmustangs.com/forums...6-4v-swap.html
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post #8 of 58 Old September 30th, 2013, 03:39 PM
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Nice. If you have any questions on the swap i did a v6 to 2v swap. Should be pretty similar

"Happiness is being blown and stroked at the same time"
V6 => Teksid 302 stroker
Caitlyn Jenner swapped
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post #9 of 58 Old September 30th, 2013, 04:26 PM Thread Starter
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Quote:
Nice. If you have any questions on the swap i did a v6 to 2v swap. Should be pretty similar
indeed it is. in fact ive been using your build as a reference point

99 3.8 v6 undergoing 97 dohc 4.6 heart surgery https://www.moddedmustangs.com/forums...6-4v-swap.html
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post #10 of 58 Old October 1st, 2013, 12:19 PM
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Lol. At least you found it!

"Happiness is being blown and stroked at the same time"
V6 => Teksid 302 stroker
Caitlyn Jenner swapped
My Build Thread click link
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post #11 of 58 Old October 3rd, 2013, 09:08 AM
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Have you procured an intake setup yet?

2014 Sterling Gray GT base
Bama 93R, Barton bracket, AEM intake
12.70 @ 114
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post #12 of 58 Old October 3rd, 2013, 09:07 PM Thread Starter
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not yet. i found a guy on the svt forums willing to sell me his upper and lower for $300 shipped. i think im gonna pull the trigger on it tomorrow after i get paid

---------- Post added at 08:07 PM ---------- Previous post was at 07:50 PM ----------

just thought I'd throw up a parts list of what I still need. I'm sure theres more but this should cover most of it

upper/lower intake manifold (from svt)
headers (from ebay)
flywheel (from svt)
clutchfork (will swap over from my t5)
31 spline driveshaft yoke ( from lmr)
clutch cable/quadrant (from lmr)
pedal assembly ( from svt)
throttle cable (free w/ Intake manifold)
gauge cluster
rear gears ( from AM)
ccrm ( from ebay)
ecu ( from ebay)
trans mount (trying to reuse the one from my t5)
hydrabooster ( from ebay)
break lines that run to the prop valve
power steering lines
ecu harness (from ebay)
intake/filter
MAF from ebay)
24lb injectors (local guy)
dash harness? (I've heard mixed things about if this is actually neccessary or not)
motor mounts (from summit)
throttle body (free w/ intake manifold)
t45 dust cover (from ebay)
imrcs with controller (from svt)

I think I'm just gonna get ford or a tuner to reprogram my PATS so the ignition switch wont be necessary and I wont have to track down a cobra to pull the cluster/ecu/ignition switch and keys from

if you think I'm missing anything by all means bring it to my attention. I may already have it sitting in the parts box that I got from the original owner of the motor but better safe than sorry

99 3.8 v6 undergoing 97 dohc 4.6 heart surgery https://www.moddedmustangs.com/forums...6-4v-swap.html

Last edited by torque1113; April 16th, 2014 at 07:27 PM.
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post #13 of 58 Old October 3rd, 2013, 09:15 PM
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Quote:
Originally Posted by torque1113 View Post
clutch cable (will prob just buy an adjustable kit from AM or something)
Stay away from the adjustable cables. They like to pop off.
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post #14 of 58 Old October 3rd, 2013, 10:24 PM Thread Starter
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Quote:
Stay away from the adjustable cables. They like to pop off.
noted

99 3.8 v6 undergoing 97 dohc 4.6 heart surgery https://www.moddedmustangs.com/forums...6-4v-swap.html
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post #15 of 58 Old October 4th, 2013, 09:16 AM
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I was going to offer one (upper, lower, TB, fuel rails, egr setup, IAC and intake tube) up if you did not have one since I am about a two hour ride away, but glad you have one lined up.

Quote:
Originally Posted by torque1113 View Post
not yet. i found a guy on the svt forums willing to sell me his upper and lower for $300 shipped. i think im gonna pull the trigger on it tomorrow after i get paid

---------- Post added at 08:07 PM ---------- Previous post was at 07:50 PM ----------

just thought I'd throw up a parts list of what I still need. I'm sure theres more but this should cover most of it

upper/lower intake manifold
headers
flywheel
driveshaft
clutch fork
clutch cable (will prob just buy an adjustable kit from AM or something)
pedal assembly
throttle cable
gauge cluster
rear gears
ccrm
ecu
trans mount (the mounting bracket on the t45 sits about an inch further back than my original trans)
hydrabooster
break lines that run to the prop valve
power steering pump
power steering lines
the harness that runs from the ecu to the engine
intake/filter
MAF
injectors
dash harness? (I've heard mixed things about if this is actually neccessary or not)
motor mounts
throttle body? (dont think the termi one i have will work)

I think I'm just gonna get ford to reprogram my PATS so the ignition switch wont be necessary and I wont have to track down a cobra to pull the cluster/ecu/ignition switch and keys from

if you think I'm missing anything by all means bring it to my attention. I may already have it sitting in the parts box that I got from the original owner of the motor but better safe than sorry

2014 Sterling Gray GT base
Bama 93R, Barton bracket, AEM intake
12.70 @ 114
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post #16 of 58 Old October 4th, 2013, 10:27 AM Thread Starter
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depends on how much you want for the whole setup. pmd

99 3.8 v6 undergoing 97 dohc 4.6 heart surgery https://www.moddedmustangs.com/forums...6-4v-swap.html
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post #17 of 58 Old October 4th, 2013, 04:04 PM
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Build looks like fun. 4V will be a blast. I have a pedal assembly if you are interested (brake pedal/clutch pedal)

Coyote Swap Thread 416rwhp/375rwtq

Turbo V6 Build Thread 353rwhp/370rwtq @ 12psi
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post #18 of 58 Old October 7th, 2013, 10:33 AM Thread Starter
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I found an aluminum flywheel for $140 yesterday so I snagged that but I ran into a little situation involving driveshafts. I found a stock t45 driveshaft for $100 shipped which i was initially gonna jump on until I found an aluminum driveshaft for $175 about an hour from where I live. I could probably get the guy to drop the price to $150 but would it be worth the effort?

99 3.8 v6 undergoing 97 dohc 4.6 heart surgery https://www.moddedmustangs.com/forums...6-4v-swap.html
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post #19 of 58 Old October 7th, 2013, 08:52 PM
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You mean is it worth the Extra $75? Sure, $75 is nothing if you have a decent paying job.

Is it worth it going from steel to aluminum?

Sure, if you're one of those people that need every little ounce of power.

"It's one of those that is good when you are heavily modded and cant think of any other mods to do. it get you like 3rwhp max lightly modded and maybe 5rwhp heavily modded.

It is lighter than the stock steel drive shaft up freeing up torque required to get everything spinning allowing the engine to turn quicker.

Slightly quicker revs, but w/ 3.73s or 4.10s you wouldn't notice it.
Less vibration in the drivetrain. You'd notice that.
One thing I did like about it though was that under normal cruising, if I was speeding lets say 50 in a 40, I could let off the gas and because light weight doesn't hold inertia as well, my speed would drop quicker. (great when going over that hill and dont know if there is a cop on the other side " - Found that on another thread.



1991 Camaro RS - Sold
1989 Iroc-Z28 -Sold
1999 Mustang GT - Under Construction
1993 Ford Escort - Sold

https://www.moddedmustangs.com/forums...v-4v-swap.html

^1999 GT w/ 2001 Cobra Motor w/ 2004 Eaton Swap^
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post #20 of 58 Old October 7th, 2013, 11:10 PM Thread Starter
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yea I figure that money could go towards that intake. I'm just gonna get a 31 spline yoke and mate my stock driveshaft to the t45. now I just have to figure out the crossmember dilema I'm having (the mounting points on the t45 are about an inch or 2 further back than my original transmission) On the other side of things I ordered my motor mounts today for $55 as well as the brake booster for $65. Next purchase will probably be the ecu wiring. I want to get all the wiring out of the way as soon as possible so i can get the engine/trans in. I have the engine harness, trans harness, and battery harness already.

99 3.8 v6 undergoing 97 dohc 4.6 heart surgery https://www.moddedmustangs.com/forums...6-4v-swap.html
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