Now before someone starts typing in how wreckless speeding is, please just leave the thread. Anyways, I took my car on the EMPTY expressway last night and hit 150 for the first time, just to see what the car was like at it. Anyways basically right afterwards I got off the expressway and the rest of the night the car felt a lot more powerful, it even sounded different. Is it possible pushing it up to that speed allowed it to clean itself a little or am I making this up? My boss said he was told by a mechanic to let the car loose every now and then because the engine will clean itself out. I know it has an adaptive throttle and all that jazz, but it didn't seem like it was at all related, the car felt entirely different.

 

Didja happen to be on North 53 at the time??

I thought I was goin fast when goin the other way was a blur...my buddy in the other car swears it was "a car just like yours but a coupe".

 

I was not, sorry. I was on 90/94 heading East.

 

I don't have a solid answer to your question but instead I have a question for you:
What was it like???!???

I've been wanting to do this myself as the last 2 miles of the toll road is always empty at night and it seems the perfect spot to give this a go. A neighbor of mine says he used to do this fairly regularly in his SLK55 AMG. My biggest fear is a deer or coyote running onto the freeway.

Anyone else have experience with a Roadster at high speeds like this?

 

Not to be a ****, but why not take it to a track? Same high speeds, better cornering (which means more fun), and no cars, animals, cops, or jokers doing 45 in the left lane.

 

I believe you absolutely get more power by driving the car harder the computer actively adjusts to your way of driving. I drove a friends srt6 and it was not as fast as mine, I drive the sh** out of mine I only get about 200 miles per tank of gas. This may explain the wide range of 1/4 times as well? Ive had mine to 145mph and it felt very safe!

 

They don't make them long enough (straight track) is the main reason and I don't want to drag race...just run it up there for the feel/thrill.

 

I was gonna say do Road America, but you all the way in florida. I think barber motorsports park in atlanta? is a fairly high speed track (Never personall ran it, but have heard a few good reviews). I know that's not actually that close either, but it's all I could come up with off the top of my head. Let me take a look at some tracks the S.E. division runs and see if there are an closer high speed ones.

Dragan

 

We have been running at Orlando Speedway and New Smyrna Beach, but high banked ovals aren't the same as a straight flat out run. It just ain't gonna happen on a track if it don't have a 2 mile straight or better. I've used runways as well, but none long enough or accessable enough.

 

WOW ... I didn't think our cars would need a two mile straight for 150 ..... when you put it that way I can see where the problem would be finding a track like that. If you ever up here try to get some time in at a track day at road america .. there is a pretty long straight and it's still a good technical track as well.

 

Ditto. Straight runs are (for me) hard to find. Too many potential obstacles, uneven road, etc...

IMOHO those fears are healthy.

I don't have a roaster, but I've taken my Coupe to just over 150 mph.
It is exhilarating. I'm a defensive driver so the anxiety was good anxiety.
The XF sticks to the ground, fairly quiet and smells of rotten egg.

The road wasn't as smooth as I would want so I felt every little bump and was very focused on whether my tires would leave the ground even for an instant. I don't like that feeling at all at those speeds. I had that happen through southern Illinois doing 135 mph. Not a good feeling for me.

 

I've had my SRT-6 at 155 just a couple of weeks ago. The car glues itself to the road though, like E-Messiah mentioned, it smells like hydrogen sulfide (probably the unleaded gas). As far as performance afterwards I haven't noticed it being better or worse. It was exhilarating, got the sweaty palms thing going but man, this car is a rocket!

 

Don't be to sure about the no animals thing. A number of years ago at Byron dragway, the track that chi-townsrt6 was making his passes at, a dragster was making a run and a deer ran onto the track. The end result was the deer ended up in the cockpit with the driver and neither one survived.

bobo have you had your car out today? How did it feel to you today?

 

I have run 150 mph on a open stretch of tollway 80 miles west of Chicago. My '04 coupe handled well.
It is 14 miles of open smooth blacktop with no exits or turnarounds. Never see the boys out there so I gave it a hell of a run !! It was a great experience and I hadn't felt a rush like that since my first 14,000 foot skydive out of a plane.

 

I've been up to 163...but that was with with the top up, a few miles of long straight road, and a state trooper buddy of mine up ahead to tell me if any cars were coming and record my speed.

It's not something that I'd recommend, or likely do again. I thought the top was going to come off from the wind buffeting, and I thought it was rather abusive holding it flat on the floor for that long.

 

Adaptive PCM at work. Try taking off the battery for a few minutes to reset the PCM. Then take it out and drive the snot out of it. Adaptive PCM will re-learn your "new" driving style and adjust fueling maps and spark advance timing for more "performance" vs "street" driving, within a bound of engine safety mind you (as per DCX engineering and software writers permit). Exhaust gas temps and air fuel ratio monitoring would show a difference if you had either measurement device hooked in.

 

This is how I got struck with the Crossfire bug. I dorve my mom's Crossfire convertible witht he top down. Got it up to 145 when she started yelling at me to slow down. The radar detector started to chirp so I slowed down. Goes fast, slows fast. That's why I bought mine. Wish I got an SRT though...

 

Ahh the skydiving. Been there too! One thing I learned from skydiving is I can go faster on the ground! I think the sweaty palms might actually be good for the leather steering wheel.

 

Top down at 145? Man, that's gotta be LOUD!!!

I've had my car on a road course before (Buttonwillow) but the straights were too short for anything much over 105mph. California Speedway offers higher speeds, but still not a chance to run flat out. Not sure I really want to run flat out with it anyway, but 140 or so would be a nice experience at least once.

As for no worries about animals on a race track, who was the Indy Car racer that almost died less than a year ago when he hit a deer at high speed at Road America? Indy Car, Crossfire Coupe or Roadster, even a full sized SUV, it doesn't matter - I do NOT want to hit an animal that big when I'm doing 140+!!!

 

Sounds like you blew all the soot out of it. A good sprint to top speed is good for a car, Cleans out a bunch of dirt.