3.8 to 4.6 DOHC swap (making sure I have everything)

Megawatts88 · January 5th, 2011, 02:38 AM

Good luck with the build man. This is one hell of a project. I did the same but swapped out all the Mach 1 stuff into my 6er. Good Luck

tommyboy2008 · January 5th, 2011, 08:58 PM

hey thanks...I've been working on cars YEARS so I dont think I will have a hard time, just a little more time consuming. As long as you lay out a plan your good to go. Ive actually been working on this project since april 2010, getting parts together from here and there. I did TONS of research for everything. I now know what every single parts function is and when Im done I'll probably be able to tell you exactly how many nuts and bolts are in the car. lol

Slower Than You · January 26th, 2011, 12:36 AM

nice work. i'm about to put a mark viii motor in my 04. anyhow, got a question for anyone that can answer. on another board, i was told i could use a ecm and wiring harness from an 01-04 gt. i would just need to extend a few connectors. i hope thats correct as i just yanked a computer out of an 03 gt at pic a part the other day. can i use this computer along with an 01 cobra harness and 03 gt gauges? also, the mark has a brand new radiator. would that fit in the mustang? and i dont need a different k member do i? just different motor mounts?

CobraStang161 · January 26th, 2011, 08:31 AM

Don't use mishimoto radiators, your better off tossing it in the garbage because the welds will eventually crack on it.

Spurred Snake · January 26th, 2011, 08:55 AM

Originally Posted by 89StangGT

PS..

Please don't add ANY of this bullshit to the exterior of your car. They look so much better with a stock body, lowered, with a nice set of wheels.

"this is what the outside will look like after im done..minus the chic"

Looks like Pittbull's ride...

Slower Than You · January 28th, 2011, 11:20 AM

Originally Posted by Slower Than You

nice work. i'm about to put a mark viii motor in my 04. anyhow, got a question for anyone that can answer. on another board, i was told i could use a ecm and wiring harness from an 01-04 gt. i would just need to extend a few connectors. i hope thats correct as i just yanked a computer out of an 03 gt at pic a part the other day. can i use this computer along with an 01 cobra harness and 03 gt gauges? also, the mark has a brand new radiator. would that fit in the mustang?

anybody?

svt4me · January 30th, 2011, 02:46 AM

I also would like to know if you can use the mark viii radiator ?

sgtboylan · February 10th, 2011, 12:04 AM

i'm doing this swap too. i'm gonna follow brett's as well. My swap won't be for 8-10 months, its from a donor 04 mach 1

v6_armyguy · February 10th, 2011, 10:37 AM

I am doing the same swap a guy buil up a 99 cobra motor for his 66 stang and it didnt fit so i got it cheap off him and its a fresh 5.0 strocker, I am in iraq right now so i havent started but i have all the parts, except the ECU. I dont know what the calibration code is. My motor came with one but it was a aftermarket for a stand alone system.

na svt · February 10th, 2011, 11:07 AM

Originally Posted by Slower Than You

anybody?

You have to use the GT harness with the GT computer.

sgtboylan · February 10th, 2011, 03:12 PM

dang... Iraq? thats gotta be lame, i went in 05,06 and 08. good luck bro

tommyboy2008 · May 4th, 2011, 08:07 PM

Update on my 04 v6 to 99 cobra swap...........everything is sweet! I had it done since feb 19th and I was so happy to hear it run. I started doing the research and gathering parts since last april, but the actual build only took like two weekends. I know my cars every nut, bolt, wire connector and everything in between...lol. It was fun, had some bugs to work out with it running lean, turned out to be one of two things-either dirty injectors or weak coils. dont know which but I replaced the coils and used seafoam at the same time. Then inspection was coming so here in pa I have to deal with emissions so I made sure everything was working correctly and the readiness monitors were ready, well turned out that the sniper special forces tuner I used actually turned off the monitors because it allows the computer to process faster with them off. So after calling sniper, they emailed me a emissions inspection tune and today it passed! woohoo..
Now for my question...I have heard some stories about inspection places doing an inspection and then the state (PA) comes knocking down their door because the vin in the pcm didnt match the cars vin because of the swap. They (the state) thinks the inspection place is plugging into another car to pass it. so has anyone thats done a swap get their car inspected and then later down the road have any trouble with the state or inspection place?? I mean, my car is inspected and everything, but when the state sees that the cars vin doesnt match the pcm vin that got recorded during the emission test-what can they do to me?

vita · May 6th, 2011, 11:19 AM

pics? video?

as for the legallity, I have no idea. MN/ND/WI has no emission testing.

slonison · March 21st, 2012, 08:23 PM

I've begun gathering parts to do this swap based on your list above, was there anything that you missed?

tommyboy2008 · March 21st, 2012, 09:11 PM

Originally Posted by slonison

I've begun gathering parts to do this swap based on your list above, was there anything that you missed?

None that I can think of...what motor are you going with? just make sure you get convertible wiring...and a tuner to turn off pats. I went with sniper special forces, works great.

tommyboy2008 · March 21st, 2012, 09:14 PM

had my car running for a year now and no problems, will be painting it here in about a month. getting ready for carlisle pa. all ford nationals...

January 5th, 2011, 02:38 AM	#21
Megawatts88 The Deer Hunter 03 Mach Clone Join Date: Dec 2006 Location: Pensacola, Fl Posts: 1,005 iTrader: 0 reviews	Good luck with the build man. This is one hell of a project. I did the same but swapped out all the Mach 1 stuff into my 6er. Good Luck __________________ Do not seek in others what you must find in yourself. Seek first to understand, then to be understood.

January 26th, 2011, 08:31 AM	#24
CobraStang161 Hardcore Enthusiast 4V twin turbo 2000 GT I live my life a quarter mile at a time xD Join Date: Jan 2007 Location: Staten Island, NY Posts: 1,739 iTrader: 0 reviews	Don't use mishimoto radiators, your better off tossing it in the garbage because the welds will eventually crack on it. __________________ 2000 Mustang GT Built 4V Motor with Sullivan Single Plane Intake Custom 66MM BB TT kit Borla XR-1 Dumped before rear Moser built 9" Rear 35 spline WaveTrac Diff with 3.75s 35 spline Moser axles 14PT roll cage and minitubbed

February 10th, 2011, 10:37 AM	#29
v6_armyguy Regular 2001 Mustang, 4v 5.0l 378rwhp Join Date: Jul 2008 Location: Fort Hood TX Posts: 146 iTrader: 0 reviews	I am doing the same swap a guy buil up a 99 cobra motor for his 66 stang and it didnt fit so i got it cheap off him and its a fresh 5.0 strocker, I am in iraq right now so i havent started but i have all the parts, except the ECU. I dont know what the calibration code is. My motor came with one but it was a aftermarket for a stand alone system. __________________ MILITARY CREW USArmy/SGT Last edited by v6_armyguy; February 10th, 2011 at 10:44 AM.

May 4th, 2011, 08:07 PM	#32
tommyboy2008 Regular 2004 mustang Join Date: Jan 2010 Location: dover, pa Posts: 66 iTrader: 0 reviews	Update on my 04 v6 to 99 cobra swap...........everything is sweet! I had it done since feb 19th and I was so happy to hear it run. I started doing the research and gathering parts since last april, but the actual build only took like two weekends. I know my cars every nut, bolt, wire connector and everything in between...lol. It was fun, had some bugs to work out with it running lean, turned out to be one of two things-either dirty injectors or weak coils. dont know which but I replaced the coils and used seafoam at the same time. Then inspection was coming so here in pa I have to deal with emissions so I made sure everything was working correctly and the readiness monitors were ready, well turned out that the sniper special forces tuner I used actually turned off the monitors because it allows the computer to process faster with them off. So after calling sniper, they emailed me a emissions inspection tune and today it passed! woohoo.. Now for my question...I have heard some stories about inspection places doing an inspection and then the state (PA) comes knocking down their door because the vin in the pcm didnt match the cars vin because of the swap. They (the state) thinks the inspection place is plugging into another car to pass it. so has anyone thats done a swap get their car inspected and then later down the road have any trouble with the state or inspection place?? I mean, my car is inspected and everything, but when the state sees that the cars vin doesnt match the pcm vin that got recorded during the emission test-what can they do to me? Last edited by tommyboy2008; May 4th, 2011 at 08:12 PM.

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Thread 3.8 to 4.6 DOHC swap (making sure I have everything) \| Forums at Modded Mustangs \| BoardReader	This thread	Refback	August 12th, 2011 09:19 AM

January 5th, 2011, 08:58 PM	#22
tommyboy2008 Regular 2004 mustang Join Date: Jan 2010 Location: dover, pa Posts: 66 iTrader: 0 reviews	hey thanks...I've been working on cars YEARS so I dont think I will have a hard time, just a little more time consuming. As long as you lay out a plan your good to go. Ive actually been working on this project since april 2010, getting parts together from here and there. I did TONS of research for everything. I now know what every single parts function is and when Im done I'll probably be able to tell you exactly how many nuts and bolts are in the car. lol

January 26th, 2011, 12:36 AM	#23
Slower Than You Regular Join Date: Aug 2009 Posts: 58 iTrader: 1 reviews	nice work. i'm about to put a mark viii motor in my 04. anyhow, got a question for anyone that can answer. on another board, i was told i could use a ecm and wiring harness from an 01-04 gt. i would just need to extend a few connectors. i hope thats correct as i just yanked a computer out of an 03 gt at pic a part the other day. can i use this computer along with an 01 cobra harness and 03 gt gauges? also, the mark has a brand new radiator. would that fit in the mustang? and i dont need a different k member do i? just different motor mounts?

January 30th, 2011, 02:46 AM	#27
svt4me Newbie Join Date: Jan 2011 Posts: 9 iTrader: 0 reviews	I also would like to know if you can use the mark viii radiator ?

February 10th, 2011, 12:04 AM	#28
sgtboylan Regular Join Date: Feb 2011 Location: Camp pendleton, ca Posts: 94 iTrader: 0 reviews	i'm doing this swap too. i'm gonna follow brett's as well. My swap won't be for 8-10 months, its from a donor 04 mach 1

February 10th, 2011, 03:12 PM	#31
sgtboylan Regular Join Date: Feb 2011 Location: Camp pendleton, ca Posts: 94 iTrader: 0 reviews	dang... Iraq? thats gotta be lame, i went in 05,06 and 08. good luck bro

March 21st, 2012, 09:14 PM	#36
tommyboy2008 Regular 2004 mustang Join Date: Jan 2010 Location: dover, pa Posts: 66 iTrader: 0 reviews	had my car running for a year now and no problems, will be painting it here in about a month. getting ready for carlisle pa. all ford nationals...

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