Just curious. What is the top speed of a 4.6 bird with only mod being a driveshaft (for safety) and a tune? Also same question with 3.73's.
Why does this seem so low?95xbird said:With stock 3.27's your looking at about 105 MPH.With a 3.73 swap you are somewhere around 92-95 MPH.
WooHoo! Someone who "gets it!" I salute you sir! I can't tell you the number of times I have had to explain this.MadMikeyL said:The 3.73s probably wouldn't make a difference in top speed cause you wouldn't run out of gear until about 165, so if anything you might go a little faster with the 3.73s cause at any given speed you would be higher in the rpms and most likely making more hp at the same vehicle speed.
I also have had to explain that more times than I can count. What's really scary is I work as a mechanic at a dealership, and I have had to explain this to guys who have been working on cars for 10+ years.DScruggs said:Why does this seem so low?
I have a Chrysler 300M with 3.89 gearing and it has a top speed of about 140-145 MPH (drag limited).
WooHoo! Someone who "gets it!" I salute you sir! I can't tell you the number of times I have had to explain this.
So what he means is don't go that fast with a stock driveshaft. Get yourself a nice one piece unit like a Dynotech or something along those lines w/ a high-speed balance and some decent u-joints and have fun.guitar maestro said:its simply not meant for high-RPMs and will start to sling around (literally).....its first order resonance occurs slightly above the cut-off speed.....in case you are not familiar with undamped oscillating systems, if left to resonate for too long, the amplitude of the vibration may cause self-destruction because it is not being controlled....this is because of the particular combination of material type, mass, length, and diameter of the driveshaft
A very good point... And exactly why I'm already running 13" duel piston pbrs and cobra rears.Peter M said:One thing often overlooked when going fast, is slowing down. Slowing from about 130 to 70(difference of 60mph) is a WHOLE lot harder than 60 to a stop. If you're not running an enhanced braking system, you're asking for potential trouble. Peter M
As has been mentioned many times before, the ballooning of the TC is rpm-based, not speed-based (for it to balloon, you would have to spin the engine higher than the rev limiter will allow).95LX said:I'm surprised that no one has mentioned torque converter balooning. The TC was another reason for a speed limiter.