Trying to figure out which engine block to start off with with my budget build, so 4.6 or 5.4? Let the debates commence!!!

 

If I recall it's cheaper to build a 5.0

 

Now keep in mind guys this is going in a s197 that is gonna be strong enough to handle alot

 

A lot is a VERY vague term .... What are your goals? HP numbers, what do you plan on using it for a DD?

 

Yeah your right I'm sorry, plan is hover around 650hp but have the bottom strong enough to handle 1000

 

And yes a dd

 

There is no debating. If you can get your hands on a 5.4 and make it run in your budget, go 5.4. 4.6 will probably be cheaper and more available but not as much potential. Unless you are talking about a 4 cam 4.6.

 

Even on a fully built block I am fairly certain the 4.6 wont be able to handle 1000HP .... ~650 yes it will but not 1000

If you want to go upwards of 1000HP I would go with a 5.4 forged bottom end with I beams if you can

 

I was thinking about yanking a 5.4 out of a f150 and doing a cobra mockup since the main caps are already 4 bolt, and the 4.6 I have st the house is only a 2 main and just selling it to the scrap yard. But everyone gives me grief about it being cat iron not aluminum

 

The 4.6 will hold the 650 you want since you already have the 4.6 as is. In the end it is up to you on which you would prefer. The 5.4 is heavier than the 4.6 is but it can withstand more power

 

I figure if the gt500 can handle the weight and still be formidable then it should be ok, I just dont have the money for a aluminum block

 

What can a 5.4 be poked and stroked too?

 

Pretty sure you can buy a stroker crank for the 4.6,punch it out 0.020 and iirc it ends up being a 5.1.

 

Sup Ev?
The only 4.6's I've seen hold up to that type of power were the forged aluminators. The 5.0 coyote is holding 800 comfortably but also forged. A 5.4 truck motor is not gonna handle 800+hp and hold together. Built and forged rotating assembly is not gonna be cheap either way you go and remember a supercharger, turbo, or n2o will be required to make that much power. So add $5k for blower or turbo. N2o, good luck.

 

How can the 5.4 not hold the power when the gt500 can? I'm not being hard headed I'm just asking

 

I believ Shelby has a completely different 5.4 block than Ford. But don't trust me on that

 

Just a copy and paste here.

The 5.4 L (5408 cc, 330 CID)[2] V8 is a member of the Modular engine family first introduced in the redesigned 1997 Ford F-150 as a Triton V8. Bore diameter is 90.2 mm (3.552 in) and stroke is 105.8 mm (4.165 in), the increased stroke necessitated a taller 256 mm (10.079 in) engine block deck height. A 169.1 mm (6.658 in) connecting rod length is used to achieve a 1.60:1 rod to stroke ratio. The 5.4 L 2V was built at the Windsor Engine Plant, while the 5.4 L 3V moved production to the Essex Engine Plant beginning in 2003.[23] The SVT 5.4 L 4-valve engines are built at Romeo Engine Plant, hand assembled on the niche line.[24]

Pretty sure just the Romeo was forged. 800+hp will require some type of forging for sure. The replacement for displacement requires a bulletproof bottom end and probably some type of power adder. Power is not cheap and budgets are hard to keep.

 

So a triton block with forged internals and a blower basically

 

If you want that power, forged is neccesity. Be 5.4 or 4.6 you have to go forged. Which basically throws budget to the wind. To get that power out of a mod motor takes some cash.

 

Actually a forged crank is about 350 rods and pistons about 500 for each set, heads I got no clue