What a place .Went to the closed Grumman air strip in Calverton Long Island Easter sunday@7:00 AM and made two runs @ 140MPH each way 1 up 1 down then got out of there as it is not open.So cool Fastest run yet.Google earth it. Did not run the landing strip but the west taxi way .Happy Easter Martin

 

Tough to get hit by radar in there I'm sure. Good idea for the high speed test run.

 

Was there anything left in the throttle or were you tapped out?

 

First off it was in 4th and there was more to go not shur of rpms as the end was coming up quick.I was a little guarded.But had to go for it.

 

Just looked at it. Between Grumman Blvd. and Route 25? You were on the eastern side I presume, since it is a little bit longer? Looks like you could still land a plane there if you had to.

 

Any hood vibrations at that speed?

 

No hood vibrations @all and I was on the west side.It was so cool

 

Nice idea! Don't have to worry about endangering the lives of other people. I wish they had something like that where I live.

 

This is very true....only thing that's still scary is that if something would have happened to him, how long would it have been before noticed??

 

The few times that I hit 140+ my hood was vibrating like crazy.

I hit around where the 150 line would be in 5th once, and seemed to cut out there but it was on an incline. Maybe more in there but theres no line after 145 so who knows how fast it really was. Plus calibration after 100 is trash. This was stock no mods done yet. Exciting as hell but scary as hell!

Now before everyone gets on my case I do this on a 2.5 mile closed stretch of road that, I had access to, and it is surrounded by nothing but tarmac.

 

The speed limiter kicks in at 149, so that is why it cut out on you.

 

are you sure there is a speed limiter and it isn't limited by aerodynamics and stuff? just asking cause I have no clue

 

There is an electronic speed limiter, 149mph. The GT500 is set at 155 if I remember right. These can be, and usually are, disabled by most aftermarket tunes.

 

Steve's right. The 07 GTs are limited to 145 mph, but if you factor in speedometer error and other variables, it's right on the money. I'm not sure why Ford limited it to 145 mph exactly, but usually they do this for a specific reason and mainly it is to prevent the driveshaft from failing. The 2006-up Police Interceptors with factory 3.55 gears are limited to ~120 mph, while the same Police Interceptor with factory 3.27s are limited to 130 mph. The driveline critical vehicle speed is lower with the 3.55s (meaning it starts vibrating/wobbling at a lower vehicle speed). One way to increase this critical vehicle speed is by using a lighter driveshaft (which is what Ford did: aluminum for 98-up Police cars, except for 99-00 which used aluminum metal matrix).

I'm impressed with how the factory set up the 05-up GTs and wouldn't try setting the limiter higher without exploring my options for driveshafts (carbon fiber, aluminum metal matrix, etc...) first.

 

yo be exact the crownies are 129.3 saw a show on them once, I just didnt think it was a speed limiter, because on my taurus it cuts the fuel at 110 till it drops to 105, the stang just seemes to not go anymore, so thats why I asked

 

that was refering to the 05 and previous cv's

 

The CVPIs with 3.27s have always been traditionally electronically limited to around 129-132 mph. The 99-00 CVPIs were the first to get 3.55s, and still kept the same 130 mph speed limiter. To do so, Ford used a more expensive AMMX driveshaft which they stopped equipping in the 2001 MY, and went back to 3.27s

Since the Dodge Charger police car (V6 and V8) were seriously outrunning and outhandling the Crown Vic, Ford responded with 3.55s for the 2006-up model years, but limited these to 120 mph using the regular aluminum driveshafts. A wise man once told me that with 3.55s, the stock steel driveshaft on a 98-02 Vic was good to around 125 mph before it started to seriously vibrate.

On the 03 E-250, once you hit 89 mph, you can hear the RPMs climb up and down like something was cutting out.

 

what did the 03-04 cobra's top out at? i saw somewhere that a guy went to the boonville salt flats and went 176 in one but ..he wasnt permitted to go any faster

 

tunes can take care of the speed limiters

 

Yes, that isn't a problem. It's easy to change the electronic speed limiters or remove it altogether. However, you have to ask yourself why Ford limited it to a certain speed. As I said before, the Police Interceptors were limited because of the driveshafts. The E-series cargo vans are also limited because of the driveshafts. I'd guess the same applies to the S197 GT. If you swap in a lighter driveshaft, it might reduce the chances of the driveshaft failing at higher speeds.