I realize that for 2005 the 4.0 Liter Engine was new for the Mustang. However this made me wonder if the 4.6 Liter Engine is also new or an improved version of the 4.6 used in the Mustang from 1999 - 2004?
__________________
"Political Correctness means always having to say you're sorry"
05 4.0 Screaming Yellow Premium Coupe: IUP, Auto
SCT X-Cal2, MAC CAI, Dual GT Takeoff Mufflers w/ H-Pipe
4:10 Richmond Gears, Pony Package Grill
Best 1320 Time 14.7 @ 98 MPH (Before the 4:10's)
I realize that for 2005 the 4.0 Liter Engine was new for the Mustang. However this made me wonder if the 4.6 Liter Engine is also new or an improved version of the 4.6 used in the Mustang from 1999 - 2004?
The one thing I know is changed are the heads. They are three valve now and the 2004s were 2 valves.
Yes indeed, the 4.6 used in the '05 Mustang is a new version of the stalwart "mod motor". I'm no authority, but many magazine articles have attested to this fact. In short, this is an all-aluminum engine. New for '05 are 3 valve heads, powdered metal rods, variable cam timing, coated pistons, and on and on. The best tech articles I've read, in my humble opinion, are from Popular Hot Rodding. The January 2005 issue profiles the features of the entire car, and the June 2005 issue gets into the particulars of the engine. They're both very in depth compared to most magazine articles. Both are "must reads" for any Mustang fan. I encourage anyone who doesn't subscribe to this fine magazine to obtain back issues of these two months. You won't be disappointed.
I realize that for 2005 the 4.0 Liter Engine was new for the Mustang. However this made me wonder if the 4.6 Liter Engine is also new or an improved version of the 4.6 used in the Mustang from 1999 - 2004?
4.0 is new to the Mustang, but not new. The 4.6 is improved but not new either.
Yes indeed, the 4.6 used in the '05 Mustang is a new version of the stalwart "mod motor". I'm no authority, but many magazine articles have attested to this fact. In short, this is an all-aluminum engine. New for '05 are 3 valve heads, powdered metal rods, variable cam timing, coated pistons, and on and on. The best tech articles I've read, in my humble opinion, are from Popular Hot Rodding. The January 2005 issue profiles the features of the entire car, and the June 2005 issue gets into the particulars of the engine. They're both very in depth compared to most magazine articles. Both are "must reads" for any Mustang fan. I encourage anyone who doesn't subscribe to this fine magazine to obtain back issues of these two months. You won't be disappointed.
Aluminum heads, not block as far as I know. They reserved that for the GT (only a 5.4 liter version)
__________________
2005 GT Convertible Premium, Torch Red/Black Roof, ICAP w/IUP, Manual, Anti theft, Wheel locking kit, Air bags, Boot cover, 17" aluminum wheels. 4-5-06 swapped out wheels with oem 64W's.
Umm, alum heads AND block to go with the alum hood.
The 2005 4.6 is NEW from the crank up to the composite manifold in every sense of the word. It shares the same piston dia as the 5.4 V-8 but that is about it. New plug design, Spanish Oak brain box, 3 valve variable timing, etc, etc.
As a matter of fact, the Tranny is new, the body/ frame is new, the solid axle is new, and basically the entire car is from a clean sheet of paper.
__________________
C&L CAI with MAF, Steeda UP's, FR 4.10's, Predator "C&L-MAF" Tune, Borla 3" tip catbacks, Kooks LT/ Catted X-pipe, Nitto 255/45/18(F) 285/40/18(R), Steeda Springs, Tri-Ax, Adj Pan Hard, Camber plates, Cowel Hood, Tokico Adj Dampers.
dyno; 315 RWHP/ 320 RWTQ
4.6 Liter engine question 
