Originally posted by: iFX
The Mustang should have received IRS during the mid-model refresh ten years ago in 1999. Ford says it's a cost thing but what they really mean is that they don't want to make changes to their lines and parts contracts for the existing live axel setup. People who absolutelty wanted IRS had to buy the high-end Cobra models since they were the only cars equipped with IRS (1999, 2001, 2003 and 2004). All Cobras are hand built so Ford didn't have to make changes to their primary Mustang lines, parts contracts or retrain workers, etc. IE - the accountants won again.
Ford could have engineered the 2005 Mustang from the ground up with IRS - since it's built on a hacked up DEW platform (Lincon LS, Ford Tbird & Jaguar S-Type) which was already equipped with IRS. I've heard various numbers tossed around by Ford claiming IRS would add $5,000 to $8,000 to the price of the Mustang GT - which is BS since the platform was already engineered with IRS - they had to makes changes to it to accommodate the live axle.
Anyway, when it comes to engines Ford has a great little V8 in their inventory which should be the Mustang's base engine IMO. The 3.9L V8 producing 280 HP and 280 torque. The mid range engine could be the modular 4V 5.4L producing 350 HP and 390 torque (or somewhere in the neighborhood). The high end engine could be the 5.4s big brother, the modular 3V 6.8L V10 making somewhere in the neighborhood of 475HP and 50 torque. I think it would be foolish for Ford to get into a horsepower war with anyone regarding the Mustang. Ford is capable of producing some high HP engines for sure but that isn't really what sells the Mustang - 1990s Mustang sales are a good example. The F-body cars made more HP from 1993 to their death and the Mustang still outsold those cars 10 to 1. Ok, enough of my yapping. I know everyone won't agree with my engine choices, that's ok. 🙂
Anyway, I've always been a HUGE Mustang fan. I pretty much love every generation of Mustang, yes, even the Mustang II. What's kept me from buying a new one recently is the lack of certain features that should be standard on 2000+ car, like IRS. There are those in the Mustang community who want a live rear-axle because they drag race... well, those people, who buy Mustangs (typically used ones) and gut the car to go racing are a small portion of Mustang owners - the average Mustang owner (who will be buying a V6-Auto which makes up something like 80% of Mustang sales) wants IRS. Ford, you need to listen to the people buying new cars, today not the motorheads (and I am one) who typically don't buy new and make up a teeny tiny portion of Mustang owners.