I know this probably isn't the place to ask this, and I probably won't get an answer, but why can't Ford make a large bore IRON block for the 4.6/5.4?
It could have siamesed cylinders like an aluminum block, but you wouldn't have all of the problems associated with aluminum, and it would be a lot cheaper.
If they did this, then they probably wouldn't have to spend money on R&D for the upcoming "Hurricane" V8.
Am I just not seeing something? It doesn't seem like an unsurmountable task.

 

u can bore and stroke the 4.6L iron block to 5.4L makes lot better reving and power house of a motor but it aint cheap... but thats what im going to do

 

Faster,

What will the new stroke be? Will you make up the difference in the lesser stroke by over boring the cylinders?

JMC

 

Well does anyone know who/where I can find an answer to this?

 

The tritons were designed for Front wheel drive vehicles and that is why there is no spacing of the cylinders. As for Why Ford doesn't do as you ask I would politely suggest that you ask the people at Ford. All I could come up with would be budget constraints.

JMC

 

Cant you only bore the 4.6 20-over?

 

Yeah, I know about the whole front wheel drive issue, and your other explanation sounds about right JMC, but how could I get ahold of these people? I'll try lookin' around.
Thanks anyway

 

sleved 3.75bore x 3.75 stroke

 

And when you find em, ask them to bring back a V8 five speed.

Adrianspeeder

 

Great call, but how about a modern 6 speed. I wouldn't mind updating my sig.

 

If I understand the question correctly, why doesn't Ford make an iron block instead of an aluminum block? If that's correct, the answer is pretty simple. The design of the Triton series of engines was for the modular effect and design costs. Pretty simple to design and perfect a V8 block that can also have 2 cylinders cut off or 2 cylinders added and yet use some of the same parts for all of the engines. It cuts down on the size of the inventory and cost of doing business. But that's just a minor part. The aluminum used is much, much lighter than a comparable iron engine. The front suspension doesn't have as much weight to deal with or the shock forces so it can be built lighter as well. The means Ford can build the front assembly cheaper. I don't know why you have a problem with an aluminum engine. When Ford first started testing the aluminum Triton engine, one of the tests that they decided would be a great measuring tape for it was the European Autobaun test. The engines are put on a test stand, a hydraulic load put on the crank and the engine is run wide open at peak redline for 500 hours. Before the Triton, NO American engine had ever passed the test. When testing hit the 500 hours, Ford did a quick disassemble, reviewed the parts, put them back together and run them another 1000 hours. While I won't do the math for you, if you work 40 hours a week.........well, you do the math. The Tritons are one of the best engines made in the USA. Why would you want anything else? The old trusted 302 couldn't even get close to matching it. The Triton is listed on Wards 10 Best engine ever made. So why would you want to go backward?

 

The 5.4 is an iron block

 

the 281 can only be taken up to about 305 or so.

The fun part is takin the big bore kit they sell for the mustangs and putting it in a 5.4 nothing like a 35x motor

 

They do. It is an Iron block: http://en.wikipedia.org/wiki/Ford_Triton_engine

 

okay, why not design a mod Iron engine block with bigger cubic in ( 351 400 ) and add a two intake and two ex valves per cylinder in a iron head and scrap the variable valve timming and double over head cams, timming chains, and go back to good high lift, low duration cam, The Mod engines may be cheaper to build, but thier highly expensive to replace.

To take things one step ahead, have Ford Motor sports offer factery Ford performance up grades, Ie, cold air intakes, Tunners, ect, For thease engines.