[arc590]

I recently just purchased a 1996 Lincoln Mark VIII, yes i know, not a mustang, but it is powered by one. It has the 4v 4.6l in it. from the 96-98 cobras i want to say. Anyways i know pretty much nothing about this motor, I'm a huge 5.0 and 3v junkie, but I know squat about the 4v. what are some good basic bolt on to increase hp. First I'm getting 3.73s, a shift kit, and a torque converter, but i dont know what to do with the engine. I'd like to keep the exhaust stock, for the sleeper aspect. I'd also like to put on a low psi supercharger, but with 120,000 idk if the motor could handle it. Help would be appreciated.

[4valvegt]

swap the intake for the cobra plenum or the newer 97-98 mark8 intake. You would need to change your imrc plates.

[4valvegt]

Ive been through 3 mustangs and 6 motors and seen plenty of 4.6s apart with over 150k miles most still had the hone in the cylinder walls and didnt need to be bored. These motor dont seem to wear just worry about snapping the weak ass rods.

[JC316]

Originally Posted by arc590 I recently just purchased a 1996 Lincoln Mark VIII, yes i know, not a mustang, but it is powered by one. It has the 4v 4.6l in it. from the 96-98 cobras i want to say. Anyways i know pretty much nothing about this motor, I'm a huge 5.0 and 3v junkie, but I know squat about the 4v. what are some good basic bolt on to increase hp. First I'm getting 3.73s, a shift kit, and a torque converter, but i dont know what to do with the engine. I'd like to keep the exhaust stock, for the sleeper aspect. I'd also like to put on a low psi supercharger, but with 120,000 idk if the motor could handle it. Help would be appreciated.

MarkVIII.org

These guys are the absolute best for Mark VIII info and a super friendly site. Been a member there for many a year. I have both a 97 Mark VIII powered Mustang and a 96 Mark VIII currently.

Originally Posted by 4valvegt swap the intake for the cobra plenum or the newer 97-98 mark8 intake. You would need to change your imrc plates.

The intake really doesn't do a whole lot for power, but some. The main reason for going to the cobra or 97 is for forced induction.

[NomadGT]

Originally Posted by arc590 I recently just purchased a 1996 Lincoln Mark VIII, yes i know, not a mustang, but it is powered by one.

Just a side note. The Mark VIII Motor was the test bed for the Cobra motor, as the 2v Lincoln was for the 96. Ford tests its technology performance with Lincoln before bring it to the mainstream. IRS for example, Mark VIII before the Cobra. Lincoln has to be flawless because that is what those customers want.

[mpe331lx]

Originally Posted by 4valvegt swap the intake for the cobra plenum or the newer 97-98 mark8 intake. You would need to change your imrc plates.

A swap to the 96-98 Cobra intake can be benificial, but do not swap to the newer mark intake.

It has been proven that the older tubular one performs better then the later cast one.

If you swap to the Cobra intake, look into swapping a set of 96-98 Cobra intake cams. Look up shortening the runners on the intake, you can gain some top end with no loss of low end torque by cutting off 1.5-1.75" off the ends of the runners (do not cut anymore then 1.75" off, or you will lose performance.)


A centri blower like a S, t-trim, or a D1sc will all add some midrange and a strong top end charge.

If you want some much needed torque to move that big car, look into converting to the 99 and newer heads and adding a twin screw blower designed for the 03/04 Cobras. But that swap can get expensive REALLY fast.

[CammedMysticCobra]

The Teksid Block best block ford ever contracted to be made by a company that made Ferraris formula one blocks yes the same company that made the teksid made the best blocks ford ever contracted and the same one I have in my Cobra. BTW these blocks can hold up 1500hp just little fun filed fact you might want to know.
So my advice to you forget about building the mark 8 take the block out build it get a gt put that bitch in there you will be good to go.

[dcook_14]

1500 hp on a teksid? Not quite. There's a reason they switched from aluminum blocks to iron blocks when they made the Termi.

The cobra intake manifold and intake cams for the Mark is a good place to start. After a CAI, I'm not sure there's a whole lot you can do to it without throwing boost it's way. A vortech system can be pieced together fairly cheaply if you wanted to go that route.

[acidtonic]

Originally Posted by dcook_14 1500 hp on a teksid? Not quite. There's a reason they switched from aluminum blocks to iron blocks when they made the Termi.

Yeah two reasons.....

1. They couldn't afford the much better Teksid blocks anymore.
2. Their own cast version, the WAP block, barely holds a candle to Teksid and has problems beyond 500-600rwhp.

Why?

Aluminum blocks handle heat much better. Generally they can run more compression over the same exact block in iron simply due to heat absorption and cooler temps. Also they are around 80-90lbs lighter than the Iron casting.

The blocks cast by Teksid were 6 bolt mains, the Iron 03/04 block was 4 a bolt main.

The ideal setup is a Teksid with forged internals and a blower which will last all day long at 1000rwhp or higher. The WAP block.... ehhh not so much. Hell famous engine builders such as Al P. has said himself that the Iron 03/04 blocks tend to irreparably walk main caps above 600rwhp. I can dig up the post on corral once they finish the site upgrades .

Tons of 03/04 owners that blew up the first block have switched to Teksids along with upgrading power and aren't complaining about them yet

[dcook_14]

If the iron cobra blocks have trouble holding 600 hp, I doubt MMR would use them in all of their high hp packages.

[acidtonic]

Originally Posted by dcook_14 If the iron cobra blocks have trouble holding 600 hp, I doubt MMR would use them in all of their high hp packages.

They dont but over time the main's start walking above 600.

I guess I have to go dig up Al's post now on Corral. Al definitely knows his crap so I'm trusting what he says considering he is pretty much "The man" when it comes to the modulars and especially the 5.4 world.

[bitemark46]

Teksids can handle 1500....prepped of course. But it can be done.

[acidtonic]

Originally Posted by bitemark46 Teksids can handle 1500....prepped of course. But it can be done.

You probably refer to a longer lasting build than me, but I've heard drag racers making 2000-4000hp through them for 40 hour builds which are rebuilt every season.

Those guys rarely have block problems and the rebuilding is done mostly because the internals wear out spinning from 9K-12K under that kind of boost. Block problems usually occur from flying internal debris and not from a block induced failure.

Of course the same is true for the Iron 03/04 blocks but I've heard they are having problems with mains walking without blueprinting on a build you would drive around town with. Of course that's way longer than 40hrs of operating time.

[wraitherx]

yes, teksids have been documented to be able to withstand tons of abuse and still outlast. most of us wont be pushing nearly as much as its capability but the piece of mind is sound. If you look around teksids are the blocks to go with.

As far as taking the block and throwing it into a GT, I dont think that would be necessary as if the OP wanted a mustang then he probably would have purchased one and just purchased a teksid block for a build

[CammedMysticCobra]

Originally Posted by acidtonic Yeah two reasons..... 1. They couldn't afford the much better Teksid blocks anymore. 2. Their own cast version, the WAP block, barely holds a candle to Teksid and has problems beyond 500-600rwhp. Why? Aluminum blocks handle heat much better. Generally they can run more compression over the same exact block in iron simply due to heat absorption and cooler temps. Also they are around 80-90lbs lighter than the Iron casting. The blocks cast by Teksid were 6 bolt mains, the Iron 03/04 block was 4 a bolt main. The ideal setup is a Teksid with forged internals and a blower which will last all day long at 1000rwhp or higher. The WAP block.... ehhh not so much. Hell famous engine builders such as Al P. has said himself that the Iron 03/04 blocks tend to irreparably walk main caps above 600rwhp. I can dig up the post on corral once they finish the site upgrades . Tons of 03/04 owners that blew up the first block have switched to Teksids along with upgrading power and aren't complaining about them yet

Thanks allot Acid tonic for saving me the work of the reasons why the Teksid is exaclty what I stated and can handle 1000hp up to 1500hp like if it was joke. I dont understand why people try to agrue over simple facts that found on this amazing thing every one has the power to use called google lol.

[CammedMysticCobra]

Originally Posted by bitemark46 Teksids can handle 1500....prepped of course. But it can be done.

If by prepped you mean ARP head bolts and main bolts than yes which Is also what I have.

[CammedMysticCobra]

Originally Posted by acidtonic You probably refer to a longer lasting build than me, but I've heard drag racers making 2000-4000hp through them for 40 hour builds which are rebuilt every season. Those guys rarely have block problems and the rebuilding is done mostly because the internals wear out spinning from 9K-12K under that kind of boost. Block problems usually occur from flying internal debris and not from a block induced failure. Of course the same is true for the Iron 03/04 blocks but I've heard they are having problems with mains walking without blueprinting on a build you would drive around town with. Of course that's way longer than 40hrs of operating time.

For sure Acidtonic I was going to put they can hold up to 2000 to 4000 but like you said that would be for full race blocks that wont last more than 40 hours. I meant for 1500 street daily build .

[CammedMysticCobra]

Originally Posted by dcook_14 1500 hp on a teksid? Not quite. There's a reason they switched from aluminum blocks to iron blocks when they made the Termi. The cobra intake manifold and intake cams for the Mark is a good place to start. After a CAI, I'm not sure there's a whole lot you can do to it without throwing boost it's way. A vortech system can be pieced together fairly cheaply if you wanted to go that route.

Dude next time you post something you no nothing about why dont you use this thing called google its free and it will make you sound smarter as you proven your not with this post. And as for the Iron Blocks they are garbage compared to the Teksid especially the fact the Teksid weighs 90 lbs havier and will not be able to hold the main bolts like acidtonic clearly stated and saved me time.

[mpe331lx]

Originally Posted by CammedMysticCobra For sure Acidtonic I was going to put they can hold up to 2000 to 4000 but like you said that would be for full race blocks that wont last more than 40 hours. I meant for 1500 street daily build .

There may be some turbo cubras running around with 1000+ rwhp and a teksid, but they are seriously pushing the limits.

Everyone makes the claim that they can handle 1200-1400rwhp all day long like it is nothing. To many people read about some purpose built drag cars like accufabs John Mihovets, JR grannitelli, and some others that have made SERIOUS power with a teksid block.

They assume that because they did it and made 6 second passes, that any stock teksid block can take the same power. Those blocks are hard blocked and fully deburred and prepped.

There is no exact number, but i wouldn't want to push a stock teksid block (or any of the 4.6 blocks for that matter) much more then 950-1000 rwhp for any extended amount of time.

[NomadGT]

Originally Posted by dcook_14 If the iron cobra blocks have trouble holding 600 hp, I doubt MMR would use them in all of their high hp packages.

First of all the block it self is the same Romeo casting as the GT's.

About 300.00 from Ford Motorsports.


"The 2003 SVT Mustang Cobra's 4.6-liter, DOHC V-8 is equipped with an Eaton supercharger and new aluminum alloy cylinder heads that provide increased flow capabilities. The engine produces 390 horsepower at 6,000 rpm and 390 foot-pounds of torque at 3,500 rpm, compared with the 2001 model's 320 hp at 6,000 rpm and 317 foot-pounds of torque at 4,750 rpm.

To provide strength necessary for the substantially increased torque output, the new Cobra engine is built on a cast-iron block. This unit contains the carryover forged-steel crankshaft, which is fitted with new Manley forged "H-beam" connecting rods, forged pistons similar to those in the SVT F-150 Lightning, and an aluminum flywheel similar to the 2000 SVT Mustang Cobra R's.

The engine is mated to a TTC T-56 6-speed manual transmission. Behind that, an aluminum drive shaft with upgraded universal joints connects to the rear axle, which now has a 3.55:1 gear ratio."

The above is per: John Coletti, chief engineer for Ford SVT

Ford Choose the Cast Iron for reliability reasons and cost.