98 Mark VIII Heavy "Bolt Ons"
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Old September 24th, 2010, 05:39 PM   1 links from elsewhere to this Post. Click to view. #1
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98 Mark VIII Heavy "Bolt Ons"


After insurance came through, I ended up with more than I could have sold my 98 gt for, so I'm happy.

Sooo, I got a very clean 1998 Lincoln Mark VIII







The plans are as follows:

Cobra intake and cams
4.10 gears
Police Interceptor MMC driveshaft

Now just to track down the parts!
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Old September 24th, 2010, 05:46 PM   #2
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Awesome. Do yourself a favor, rip out the air ride BS and replace with coil overs. There is 0 ride quality difference and it eliminates a major headache. Also, toss on some chrome cobra R's and chop a coil off from the springs to lower it a bit.

I honestly wouldn't go with the Cobra cams, they don't add jack for power and it's too much trouble. The intake for sure. Also, get some short tube or long tube headers and a true 2.5" dual exhaust. The exhaust is the single biggest power killer on these cars, way too restrictive.
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Old September 24th, 2010, 05:59 PM   #3
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Originally Posted by JC316 View Post
Awesome. Do yourself a favor, rip out the air ride BS and replace with coil overs. There is 0 ride quality difference and it eliminates a major headache. Also, toss on some chrome cobra R's and chop a coil off from the springs to lower it a bit.

I honestly wouldn't go with the Cobra cams, they don't add jack for power and it's too much trouble. The intake for sure. Also, get some short tube or long tube headers and a true 2.5" dual exhaust. The exhaust is the single biggest power killer on these cars, way too restrictive.
The previous owner just replace the air ride for around 2k (new pump and bags)

The cobra cams have 10ish more degrees of duration. If i find a cobra shortbock (ahemm kimo), I will just take stuff I need off of that.

I will be converting the exhaust later to true dual (off road x piped with flowmasters off my mustang)

The intake is also restrictive as well. It has a resonator right next to the maf to silence whatever air is going into the engine. It will be replaced with I do the cobra manifold.
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Old September 24th, 2010, 07:24 PM   #4
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Originally Posted by majorownage View Post
The previous owner just replace the air ride for around 2k (new pump and bags)

The cobra cams have 10ish more degrees of duration. If i find a cobra shortbock (ahemm kimo), I will just take stuff I need off of that.

I will be converting the exhaust later to true dual (off road x piped with flowmasters off my mustang)

The intake is also restrictive as well. It has a resonator right next to the maf to silence whatever air is going into the engine. It will be replaced with I do the cobra manifold.
Those intakes aren't as restrictive as you might think, but it is worth it to go over to a Cobra. I couldn't justify paying $300+ for at best 10HP. The cobra cams really don't add much unless you are going with forced induction. For the price and work involved, there is no way I would put those in, you might see 5-10 HP with a NA car. Completely not worth it to me.

Most people dyno around 220HP to the wheels on a stock Mark VIII. In a 96 mustang with Cobra exhaust manifolds and an ORX pipe, a completely stock 97 motor put down 275 HP to the wheels.

Granted that was going through a manual transmission, but you get the idea. Hell, say the auto is taking you down to 250HP, that is still a 30HP gain with stock manifolds and a high flow midpipe. That is what I call one restrictive exhaust.
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Old September 24th, 2010, 09:21 PM   #5
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nice find, skip the gears, intake, and cams, find a cobra bracket and head unit and run some boost through it.
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Old September 24th, 2010, 10:42 PM   #6
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Originally Posted by DickH View Post
nice find, skip the gears, intake, and cams, find a cobra bracket and head unit and run some boost through it.
The gears are a must on these cars. They came with 3.08 base and 3.27 LSC. Nowhere near enough gear with an IMRC delete.
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Old September 24th, 2010, 11:14 PM   #7
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Originally Posted by DickH View Post
nice find, skip the gears, intake, and cams, find a cobra bracket and head unit and run some boost through it.
I'm staying N/A until I get my navy scholarship come through.

Then its build time

Of course all the work (except machining and balancing) will be done by me and posted on the forum.

I'm surprised nobody has asked what an MMC driveshaft is....

lol
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Old September 25th, 2010, 01:30 AM   #8
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Originally Posted by JC316 View Post
Most people dyno around 220HP to the wheels on a stock Mark VIII. In a 96 mustang with Cobra exhaust manifolds and an ORX pipe, a completely stock 97 motor put down 275 HP to the wheels.

Am I just reading this wrong, or are you saying that a 1997 Mustang GT, with a NPI 2 valve 4.6 motor will make 275 rear wheel horsepower with just an offroad x pipe, and cobra manifolds? I thought headers, catback exhaust, intake, and tune on those put you at around 220-240rwhp?
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Old September 25th, 2010, 02:01 AM   #9
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Originally Posted by 06Black5spdGT View Post
Am I just reading this wrong, or are you saying that a 1997 Mustang GT, with a NPI 2 valve 4.6 motor will make 275 rear wheel horsepower with just an offroad x pipe, and cobra manifolds? I thought headers, catback exhaust, intake, and tune on those put you at around 220-240rwhp?
You are definitely reading it wrong. Those numbers were put down with a 97 Mark VIII LSC motor that was swapped into a 96 Mustang GT. I have a writeup on here somewhere.
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Old September 25th, 2010, 02:02 AM   #10
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Figured I was, it's just that since there was no mention made of it actually being a swapped 1997 Mustang I was like what the hell.
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Old September 25th, 2010, 06:44 AM   #11
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Here is an idea, before investing too much into cams and a manifold, consider a C head swap? Mark viii internals and transmission wont allow for the revs that the B heads need so you are stuck without power. Get hands on some C heads and a manifold and power should improve a fair amount.
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Old September 25th, 2010, 11:50 AM   #12
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Originally Posted by DickH View Post
Here is an idea, before investing too much into cams and a manifold, consider a C head swap? Mark viii internals and transmission wont allow for the revs that the B heads need so you are stuck without power. Get hands on some C heads and a manifold and power should improve a fair amount.
Ewww c "tumble" port heads I'll stick to my b's hahaha and wait to grab some 03-04 cobra/mach 1 heads.

For now, I'm just looking to spend 800-1000

The aluminum driveshaft I'm swapping in would probably give more rwhp than a c head swap.

I guess I'll bring the car to hooters for a full exhaust swap on monday because I'm having trouble finding a trashed 96-98 cobra block.
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Last edited by majorownage; September 25th, 2010 at 12:08 PM.
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Old October 18th, 2010, 01:44 AM   #13
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*update*

just traded my PI swap for cobra intake cams and heads

(circa 1998)

Will take pictures when received
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