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Well now i've gone and done it...

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Old 05-20-2011, 03:35 PM   #1
BlackMage
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Default Well now i've gone and done it...

well i picked up a 93 mark viii motor for $300, 96k miles, no harness, but has all the manifolds and tb. no accessories. hopefully the swap wont be to bad but im super excited to get this thing in here now. i dont think my 96 gt puts down more than 150hp to the wheels with how worn it is so this should be a nice kick in the pants. ill get pics up as soon as i can. just wanted to share my excitement.

soo... anyone got some mach 1 or cobra heads laying around with a matching intake
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Old 05-20-2011, 05:38 PM   #2
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LL APPROVES.

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Old 05-27-2011, 07:19 AM   #3
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Really couldnt have asked for a much cleaner motor... now time to pull the gt motor and start swapping components
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Old 05-27-2011, 07:37 PM   #4
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Port them heads out and clean everything up and new gaskets and rear/front main seals and all
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Old 05-27-2011, 08:02 PM   #5
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I found a 95 im trying to get, but the guy is running me around in circles. Good choice man. Seems like this is the "new thing".
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Old 05-27-2011, 08:06 PM   #6
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im on a budget so i prob wont do huge port job, maybe just gasket match all the ports for now. Im curerntly looking for intake cams from an actual cobra (those are the only thing different basically, exhaust cams are the same) and i still need exhaust manifolds and a different intake manifold. But new seals are def getting put in before the motor goes in, not gonna skip that part and screw myslef when i go to start it and the rear main leaks a quart a minute haha
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Old 05-27-2011, 08:18 PM   #7
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okay without without going through all of the research and searching here and in google.

What's special about the Mark VIII motor? Is it like the Maurader motor?
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Old 05-27-2011, 08:50 PM   #8
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the mark viii motor from 93-98 has the same block and heads as the 96-98 cobra. same exhaust valves but different intake valves (mark has 10* difference duration or something silly) these blocks were made by a company called Teksid, are all aluminum, and strong as all heck. i believe people have gotten 1400hp out of them... if you want a 4v in your 96-04 gt, this swap is what you want. it is basically a direct bolt in. and the motor will run on the stock GT tune, and run well. can also use the same 6 bolt flywheel and trans from a 96-04 gt. prob the easiest and cheapest swap you can do. besides doing a PI motor swap. the mark was rated at like 280hp, and the cobra was like 305. with the cobra intake and camshaft you are right at that number then.

small list of things you need are:
fuel rails
exhaust manifolds
intake manifold
alternator
coolant hoses
gas pedal cable

the heads are i think the B series heads (people correct me if im off with the letters!!!) the mach 1 and cobras from 99-04 have the C series heads and with those heads u can swap the termi supercharger onto. so a simple head swap onto the mark motors and you can make good power. BUT, the mark motors do not have forged internals.
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Old 05-28-2011, 11:13 AM   #9
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Quote:
Originally Posted by BlackMage View Post
the mark viii motor from 93-98 has the same block and heads as the 96-98 cobra. same exhaust valves but different intake valves (mark has 10* difference duration or something silly) these blocks were made by a company called Teksid, are all aluminum, and strong as all heck. i believe people have gotten 1400hp out of them... if you want a 4v in your 96-04 gt, this swap is what you want. it is basically a direct bolt in. and the motor will run on the stock GT tune, and run well. can also use the same 6 bolt flywheel and trans from a 96-04 gt. prob the easiest and cheapest swap you can do. besides doing a PI motor swap. the mark was rated at like 280hp, and the cobra was like 305. with the cobra intake and camshaft you are right at that number then.

small list of things you need are:
fuel rails
exhaust manifolds
intake manifold
alternator
coolant hoses
gas pedal cable

the heads are i think the B series heads (people correct me if im off with the letters!!!) the mach 1 and cobras from 99-04 have the C series heads and with those heads u can swap the termi supercharger onto. so a simple head swap onto the mark motors and you can make good power. BUT, the mark motors do not have forged internals.
Nice find for 300 IMO

I think youre pretty correct on your statement.
But I believe the crank isnt forged in the Mark viii as the Cobra is.
I also read some of the 98 Cobras missed out on the forged cranks.
At least I know my 97 Cobra has a forged crank but rods and piston are the weak point.

GL with the swap and take plenty of pictures
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Old 05-28-2011, 11:32 AM   #10
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i just noticed some errors in my post haha, i mean to say the intake CAMS are different, not valves and the exhaust CAMS are the same, not valves.

and you are correct, the mark's do not have forged parts. only cast stuff. :-/ but i'll take it for the money i paid.

Im planning on tearing the motor down a little bit this afternoon to replace some seals and stuff, and to clean it up. Im still looking for some headers, and once i get those, the engine will be coming out of the mustang. and trust me, there will be plenty of pics to go around
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Old 05-28-2011, 11:00 PM   #11
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Good luck with your swap.I've seen a few sets of cobra intake cams on some other forums for like $200 which isn't bad.I think complete cobra intakes are going for $300-400.The mark viii has IMRC's correct?You'll need to delete them(as I did)bc everyone has told me the GT computer won't open them up and it can't be programmed to.When I say everyone I mean guys that have done this swap and the tuners I've talked to.Keep us updated on your progress.
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Old 05-30-2011, 09:26 AM   #12
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yea the mark has the IMRC's. That was one of the main project yesterday was to tear them all out. And it couldnt have been easier. i just used a dremel and cut all the screws holding the butterfly valves on, and the rod literally just slides all the way out. To fill in the holes on either end i just filled them with JB weld and left the bearings in.

Im debating filling in the areas between the intake runners with JB as well, because basically ALL of the intake runners are connected at that point, but im not sure if it will make a difference. Im not talking about the small holes that the rod went thru, but there are small cavities(about the size of a thumb) between each pair of intake runners. Im guessing that cant be good for the air, ill get pics later. Here is a pic of how the JB weld on the end did turn out though.
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Old 05-30-2011, 09:28 AM   #13
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and no hating on the colors, my 96 has violet pearl in it so the valve covers are basically matching nothing is tightened down yet, i just wanted to throw a couple pieces on there to see how it will look. Still trying to find some decent priced 99-04 exhaust manifolds... and that stupid cobra intake haha.

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Old 05-30-2011, 09:35 AM   #14
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Motor is really cleaning up nice. Should look real nice in the bay.
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Old 05-30-2011, 10:03 AM   #15
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I cant wait to get mine!
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Old 05-30-2011, 10:35 AM   #16
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She cleaned up perty
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Old 05-30-2011, 12:11 PM   #17
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looks good bro!!!
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Old 05-30-2011, 03:34 PM   #18
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are aviator cams the same as the cobras? i heard they are but not 100% correct. if so I have a set I'll sell you.
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Old 05-30-2011, 03:44 PM   #19
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are aviator cams the same as the cobras? i heard they are but not 100% correct. if so I have a set I'll sell you.
thats a good question... what would you be looking to get for em if they were? what year and stuff? and im not trying to lowball or anything, but im on a very tight budget so i wouldnt be willing to paying a lot for em haha
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Old 05-30-2011, 03:57 PM   #20
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thats a good question... what would you be looking to get for em if they were? what year and stuff? and im not trying to lowball or anything, but im on a very tight budget so i wouldnt be willing to paying a lot for em haha
They're out of an '03 aviator 4.6 4v. If all you want are the intake cams themselves then I can do 50 shipped. I'd imagine it'll be about 10-15 bucks to ship.
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Old 05-30-2011, 03:57 PM
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