I wonder if the boss will really come out......just found this about the Bullit:

http://www.ford.com/go/septemberwebcast/default.htm

forward to around 10:30

 

More from FourCam330:

 

So I was right. Sweet! Hook me up with one of those industry-anylyst jobs

 

I just hope this means that the 5.4 3v could make it into the Mustang GT

Say if the Boss is putting out... 425-450hp
the GT should/could have 325-375

Or maybe an engine option for it...

 

well there's more SEs coming down the pipe, think "Mach1"

 

I would prefer a 5.0L 4V engine for the Boss but a 5.8L engine would be great as long as it's an all alloy aluminum engine in NA trim. The Boss doesn't need a heavy iron block engine.

 

Hmm, both the original 69 - 70 Boss 302 and Boss 429 had cast iron blocks.

How could any Mustang be called a Boss if all it had was a whimpy AL block.

 

Very true, but a '69 Boss only weighed 3,250 lbs. A key method to reducing the S197's weight would be to ditch the iron block in favor of a high strength alloy block.

 

Hey what happened to all the talk about CGI blocks? Did the technology not pan out or was it to cost prohibitive to machine them?

 

CGI blocks are coming (and are already in production if I am not mistaken), but diesels are getting this first. In fact, if I am not mistaken the upcoming 4.4L TDI V-8 for the F-150 is CGI.

 

Maybe we'll be surprised and the Boss engine will have a CGI block.

 

If that were so, I wonder how it would compare weight wise to an aluminum block? Other than weight savings aluminum really doesn't bring anything else to the table (Well okay, you could polish it to a nice silvery luster)

 

AL does bring a couple things. Vs cast iron, AL can be cast in more intricate shapes it conducts / dissipates heat better iron and has the same thermal characteristics (expansion etc.) as the alumiunum heads. From a manufacturing standpoint it can be machined easier & faster than cast iron with less tool wear.

 

All good stuff for a set of cylinderheads methinks, but less so for the block which seems to be where you want to retain the heat as evidenced by reverse cooled engines, but I'm splitting hairs here.

 

Guess you missed that part

 

AL blocks can be designed pretty much for any degree of strength as look at all the AL block F1 motors zinging along at a billion HP and a trillion rpm for hours on end.

Perhaps for the Nth degree of strength, iron might have a small advantage, but I think whatever vanishingly small potential advantage exists there at some esoteric extreme is far more than offset by the more realizable advantages aluminum has for street vehicles, even very high performance street vehicle. Look at the 505 hp LS7 or the 1000hp Bugatti V16, both AL blocks.

The Modular blocks have some enherent limitation harkening back to their roots as a rather light suty, FWD origins rather than being conceived with a lot of hi-po applications at its genisis. Some of this can be seen in the rather tight bore centers, long stroke, under square bores (more valve shrouding) and somewhat narrow main bearings. On the other hand, Ford has fairly well beefed up this orginially fey piece as evidenced by the Ford GT.

As for heat retention qualities, I think that would be far better and more precisely achieved through coolant control mechanisms.

 

My speculation:

4.6 4V V8 tried ad nauseam (Mach 1, 99-01 Cobra, 03-04 Cobra)
5.4 4V V8 tried ad nauseam (Navigator, GT, GT500)
4.6 2V V8, 5.4 2V V8 = not new either

If Ford is going to change the Stang in 2009/2010 like its other platforms (almost every Ford car seems to have some major changes planned for 08-10), it will probably go to a new powerplant:

5.8L (Boss 351) OHV V8 "Hurricane" for the GT
6.2L OHV V8 "Hurricane" for the F-series

I know - everyone is guessing OHC, but I am sticking by my guess of OHV. If Ford is interested in the horsepower war, they will go with an OHV engine design. This is an easy way of boosting low to mid range torque and with modern multi-displacement systems, good gas mileage can be retained.

 

Its an OHC

And I'd love to see at least the 5.4 3v AL block in the GT
I VERY highly doubt the 5.8 will make it into the GT
Thats rumoured to be the BOSS

I could see the 6+ (6.2 or 6.4..whatever it will be this week) in the GT500/Cobra level car.

 

I have not read any official announcements of the 5.8/6.2 Hurricane being an OHC, but if so, then Ford already lost the hp wars.

 

Bullhunky. Big-displacement OHV V8s may be well-known and fairly bulletproof, but there's nothing giving them inately better HP. Just becuase the Bowtie Boys have been saving cash by sticking with it all this time doesn't make it a "better" architecture for an HP war, witness Europe's and Asia's entries.