There are intakes available, but they are single plane.

I don't know if you are aware of this or not.

-SULLIVAN PERFORMANCE-

 

Sorry dude, these guys are all over it too.

These adpaters will allow you to bolt on any 302 intake you want:

http://karkraft.com/carbmodular_parts.htm

Besides, affordable and 4.6 DOHC don't usually come up in the same sentence.

 

The Kar Kraft manifold isn't nearly as efficient as a true single plain. The design is cobbled up. Look at the ports, they have to turn from a 289/302 rectangle into the oval shape of the 4.6. I work with airflow daily, this is not an efficient design. The Sullivan is nice but Edelbrock can bring a better manifold (Casting, R&D) to market for less than $350 Why pay $670 for an intake? The point is to bring in some competition to the market place. As for cost, I can build a stout 4.6 DOHC for half of a 302. I know because I've built both. Price a 4 bolt block (iron or aluminum) for a SBF now price a stock Cobra or Mach 1 block, hell even a 2V block is better than most SBF blocks. Forged cranks? Used Cobras can be had for 300 or less, the SBF at least $5-600. Aluminum heads? SBF, 900-1500, 03-04 Cobra/Mach 1 heads, $250-500. The misconception that a 4.6 is 2X-3X expensive is a myth.

 

The Kar Kraft manifold isn't nearly as efficient as a true single plain. The design is cobbled up. Look at the ports, they have to turn from a 289/302 rectangle into the oval shape of the 4.6. I work with airflow daily, this is not an efficient design. The Sullivan is nice but Edelbrock can bring a better manifold (Casting, R&D) to market for less than $350 Why pay $670 for an intake? The point is to bring in some competition to the market place. As for cost, I can build a stout 4.6 DOHC for half of a 302. I know because I've built both. Price a 4 bolt block (iron or aluminum) for a SBF now price a stock Cobra or Mach 1 block, hell even a 2V block is better than most SBF blocks. Forged cranks? Used Cobras can be had for 300 or less, the SBF at least $5-600. Aluminum heads? SBF, 900-1500, 03-04 Cobra/Mach 1 heads, $250-500. The misconception that a 4.6 is 2X-3X expensive is a myth.

Point taken. Wasn't sure what your goal was (ease of installation / low cost / high performance)

Care to share any of more of your low cost tips for building a 4.6? (source for head bolts / cams / gaskets / etc)

You don't have to sell me on the 4.6 :thumbup:

 

A 4.6, with that C-4 adapter sure would make my '31 more interesting (I wonder how the3 valve V10 out of my '06 F350 would work :nono: Dave :nono: )

Dave W

 

Arrowhead please don't take my post previously as a slam I was just trying to inform you of the point of the petition. I think the 4.6 DOHC is a great engine for a hot rod it will of course require more gear because it is meant to work in a higher RPM range but it's potential is far greater than the old 289/302. As for building one on the cheap here are some tips:

Injection: You can go with the standard fuel injection with all parts from a Cobra Mach 1 but if we can get a cheaper carb intake it may be the way to go. For the street a 650 carb would be a good place to start a stock cam/mild cam set up

Intake: The Sullivan is out there and pretty pricey. If we can get some more people to sign the petition (We'll need prolly a thousand) The info could be taken to Edelbrock and given to one of there reps we are in contact with. So figure the intake to cost a little more than a 289/302.

Heads: The real beauty of this engine. Look for 99-2001 Lincoln Continental heads they are the same heads right down to the cams and springs as the 99/01 Cobra and are a good street head. Thes can be had cheap too 150-350! A step up from these would be the 03-05 DOHC heads that were stock on 03-04 Cobras and Mach 1's as well as 03-05 Marauders and Aviators figure 450-500 for a nice used complete set. I would have a valve job and surface mill done at the least but you will still have more potential than any 289/302 head out there

Valvetrain: This is where alot of people think the cost of the build is too high. A tip, Ford Racing Performance Parts sells an excellent set of valves and springs for these. They were part of the FR500 package and the springs will handle a good deal of RPM and Lift. The valves are made by Ferrea and can be had for as little as 8.75 a piece. These are what I use.

Cams: yes a 1000 bucks for cams is pricey so if you want something that is a good street compromise look for cams form a 96-98 Cobra or the Ford GT supercar. These are both a nice choice and used 96-98 can be had for around 125. The GT cams are made for a supercharger but will work N/A they are avaliavle for around 450

Blocks: Price a good 4 bolt 302 block. Dart, FRPP whoever, it will cost you around 1700. Now look for a 93-98 Lincoln Continental these are the strongest block Ford ever released for the 4.6. They are actually Italian blocks cast by Teksid. They have been able to hold north of 1200 HP when pressed. For anything under a thousand HP they will hold up very nicely. Cost 250-350. I I Bought one at a junkyard for 83.00!

Piston/Rods: Go aftermarket here. Figure 350-450 for a good H-beam and around 500-600 for slugs and rings. My preference is Mod Max Rods and Diamond Pistons. Cost is the same as a 289/302

Cranks: Cobras and 5 spd Mach 1's have a forged steel crank that will not break unless seriously abused. It's as good or better then the 1200 American forged 302 cranks and much better then the Chinese imported Scat/Eagle cranks that sell for 750. If you want to go cheaper use a crank from a Mustang GT or any other 2V. I don't know of anyone who has broken one of these yet. If they did they had a problem in the tune. Figure 50-100 for the 2V crank and 200-400 for the Cobra/Mach 1.

Mod motors are actually affordable if you do your homework. I like them because they are the true sense of Hot Rodding. A large mix of the best factory parts with a dash of aftermarket and some creativity and you have a hell of an engine. BTW if anyone wants a 5.4L because a 4.6 is too small, LOL You can do these cheaper in the short block area. Look for cranks from 98-99 F150's these are a forged crank like the Cobra Mach 1 and pre 2000 or 04-05 iron blocks. Cranks are selling for less then 100 and blocks are 100-250.

 

Thomas,

Thanks for the great tips, sounds like you have a lot of experience with these motors. I used a '93 Mark VIII for my blower motor, so I know what you mean about the strength of the aluminum blocks. I used a 96 Cobra lower intake and made an adapter for the 6-71 to bolt to. I kept the injectors in the stock location on the lower intake and built a Megasquirt to run the fuel and ignition systems. Megasquirt is speed density so no Mass Air required. The bug catcher is my throttle. I run a Baumann controller for the 4R70W trans.

I really like the fact that the aluminum 4.6 DOHC hardly weighs any more that the 302 I originally had in the car. I found a good running Mark VIII donor car and just used the motor as is, so all the internals are stock. I have not torn into one of these yet, but my next build I'm hoping to upgrade the bottom end with forged internals and lower the compression ratio so it will work better in a blown application. I currently back off timing under boost conditions as I am concerned with the ability of the stock internals to stay together under higher boost.

When I looked into it, it was going to be around $500 to just open, inspect and reassemble because of the new gaskets and bolts required. So I figured what the heck, if I blow it up, I'll just get another Mark VIII donor and replace the long block.

 

If you guys want or need more info please let me know as i have more tricks to divulge. However i would like to get back to the topic at hand which is getting as many people as possible to sign the petition. As you can see the benefits of these engines are many and an affordable intake for the use of carbs or modified for fuel injection would be a great benefit to everyone Stangbangers or Hot Rodders. I can start another thread with the info I have. If anyone needs parts for these I do deal with two suppliers as a W/D however it's a small side business I run not my daily job. I also keep a fair amount of 4.6 2V & 4V parts on hand in my garage and can get what ever you need practically. Just let me know how I can help anyone out.

Arrowhead keep the stock crank in that engine, it's cast but it's tough and actually a little lighter than the forged Cobra/Mach 1. For bearings use Federal Mogul HP series and a good H beam rod with ARP 2000's I use the Mod Max because they don't cost more to upgrade to these bolts. Also I would suggest a Diamond or Ross Piston with a 17cc dish for blower friendly compression. Just go Fel pro on the gaskets. They make a nice MLS gasket that works well as long as the deck and head surfaces are machined near dead flat. That is VERY important on these engines. The surface finish should be no more than 20 Ra, very smooth!

 

By the way you have to have a valid email to sign this. However Chris is the only person with access to the list and unless they are requested by Edelbrock will be kept private.

 

I think all the folks reading this should be informed that the 3 valve heads/cams are not a wise choice for a hot rod cam swap.

The cam phasers are delicate and will break with much more than stock spring pressure. They are sensitive to oil pressure changes, even going from 5w20 to 5w30 can make the cam phasers go all wonky.



Larry

 

The cam phasers can be deleted and the 3V heads are actually quite good. I will have to look up info for removing the cam phasers and replacing them with standard gears. It has been done before.

 

Has Ford not released their single plane carb'd intake for this engine?

 

Good question

Has Ford not released their single plane carb'd intake for this engine?

Whats up, new to the mod motors, and wanting to run carb. setup on a Mark VIII DOHC in fox stang and has edelbrock stepped up to the plate. Just wondering about these good motors

 

The cam phasers are delicate

Comp has phasers that limit the travel to less than was OEM- so there's a wider latitude w/what cams can be used, and STILL reap benefits of having the adjustable timing.

 

The Chevy LS1/LS2/LS6 will still smoke a mod motor !! LOL The mod in Arrowhead's rod does look sweet tho, kind of Cammer/Boss 429'ish with the big valvecovers.