What Is YOUR Top Speed?
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Joined: Jan 2007
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From: Miami, Florida
Re: What Is YOUR Top Speed?
Originally Posted by dwightdmagee
oledoc2u, I don't know much about this, so maybe you can help me out.
I regularly run my roaster limited at 150 along Alligator Alley, but it always tops out around 149-153. This is not due to lack of pedal, it seems, but pure HP. Is it true that the XF is wired shut, or governed, at that speed?
If so, how is it accomplished? Fuel starvation? ... or ignition retardation? How do you 'un-wire' your SRT6 to do better with a tune? Also, I understand that manufactures will limit top speeds based upon OEM tire speed-ratings. True or no? Some say the XF may tend to 'float' somewhat at high speed. Mine feels firm and smooth as you'd ask (little hard on the rag top), but can this sensation be associated with tire expansion? I'm running a decent ultra-high performance summer Bridgestone.
Thanks for any insight.
I regularly run my roaster limited at 150 along Alligator Alley, but it always tops out around 149-153. This is not due to lack of pedal, it seems, but pure HP. Is it true that the XF is wired shut, or governed, at that speed?
If so, how is it accomplished? Fuel starvation? ... or ignition retardation? How do you 'un-wire' your SRT6 to do better with a tune? Also, I understand that manufactures will limit top speeds based upon OEM tire speed-ratings. True or no? Some say the XF may tend to 'float' somewhat at high speed. Mine feels firm and smooth as you'd ask (little hard on the rag top), but can this sensation be associated with tire expansion? I'm running a decent ultra-high performance summer Bridgestone.
Thanks for any insight.
I hit 164 on the turnpike just before I 75. And that was confirmed by the GPS. I also have the Bridgestone tires that are y/Z rated. That was after the SRT was tuned by LET.
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Joined: Jan 2009
Posts: 6,285
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From: Carmel, In.
Re: What Is YOUR Top Speed?
I used to live in Naples and had lots of friends in Miami and would make the trip a few times a month across the alley....
Be CAREFUL, they have helicopters and planes doing flyovers pretty regularly looking for exactly that, I got a ticket not far from there last Dec. 26th, merry Christmas to me I guess.....
Be CAREFUL, they have helicopters and planes doing flyovers pretty regularly looking for exactly that, I got a ticket not far from there last Dec. 26th, merry Christmas to me I guess.....
Originally Posted by dwightdmagee
oledoc2u, I don't know much about this, so maybe you can help me out.
I regularly run my roaster limited at 150 along Alligator Alley, but it always tops out around 149-153. This is not due to lack of pedal, it seems, but pure HP. Is it true that the XF is wired shut, or governed, at that speed?
If so, how is it accomplished? Fuel starvation? ... or ignition retardation? How do you 'un-wire' your SRT6 to do better with a tune? Also, I understand that manufactures will limit top speeds based upon OEM tire speed-ratings. True or no? Some say the XF may tend to 'float' somewhat at high speed. Mine feels firm and smooth as you'd ask (little hard on the rag top), but can this sensation be associated with tire expansion? I'm running a decent ultra-high performance summer Bridgestone.
Thanks for any insight.
I regularly run my roaster limited at 150 along Alligator Alley, but it always tops out around 149-153. This is not due to lack of pedal, it seems, but pure HP. Is it true that the XF is wired shut, or governed, at that speed?
If so, how is it accomplished? Fuel starvation? ... or ignition retardation? How do you 'un-wire' your SRT6 to do better with a tune? Also, I understand that manufactures will limit top speeds based upon OEM tire speed-ratings. True or no? Some say the XF may tend to 'float' somewhat at high speed. Mine feels firm and smooth as you'd ask (little hard on the rag top), but can this sensation be associated with tire expansion? I'm running a decent ultra-high performance summer Bridgestone.
Thanks for any insight.
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Joined: Jan 2009
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From: homeless
Re: What Is YOUR Top Speed?
Originally Posted by BoilerUpXFire
I used to live in Naples and had lots of friends in Miami and would make the trip a few times a month across the alley....
Be CAREFUL, they have helicopters and planes doing flyovers pretty regularly looking for exactly that, I got a ticket not far from there last Dec. 26th, merry Christmas to me I guess.....
Be CAREFUL, they have helicopters and planes doing flyovers pretty regularly looking for exactly that, I got a ticket not far from there last Dec. 26th, merry Christmas to me I guess.....
In the winter, when it's not so godawful hot, I usually run sans the top and do keep an eye to the sky (always makes for a bad hair day). The obvious warning, tho, is to play by the rules over stretches of pavement marked with the VASR lines.
BTW: It's amazing the things that can get sucked out of the cabin at 120-plus, so best keep your stuff stowed in the trunk. The primary dread of running Alligator Alley at a high rate of speed is just that - running over one of the damn things. Yikes.
But back to my question, can anybody explain to me how and why these cars are governed for speed right out of the box? I don't make a habit of cruising much over 5,000 rpm, but when I do, how and what does the ECU arbitrarily deploy to limit my speed to 150?
Last edited by dwightdmagee; Aug 10, 2009 at 11:36 AM.
Joined: Dec 2008
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From: Fayetteville, NC
Re: What Is YOUR Top Speed?
Hit 140 again last night on the way to dinner with the wife Guy with a turbocharged jetta asked for a thrashing so i gave it to him. only time we were neck and neck was at the start. at 130 he was bout 3 car lengths behind. i kept pushing just because i got one of those wives that loves the sound of an engine at a high speed.
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From: Sierra Vista, Arizona
Re: What Is YOUR Top Speed?
Originally Posted by kenyonmjr6
i kept pushing just because i got one of those wives that loves the sound of an engine at a high speed.
My wife just covers her ears and closes her eyes when ever I mash the gas.
That's no fun.
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Re: What Is YOUR Top Speed?
I have had my coupe only up to148 and wow what a smooth ride.not sure what Allen has had his roadster up to.He is not telling me lol.
I sure would love to see us get it on together just to see who is the better driver lol.I know you guys will say Allen.lol but this old blond streetrodder is not scared of speed and would LOVE to take him .
I sure would love to see us get it on together just to see who is the better driver lol.I know you guys will say Allen.lol but this old blond streetrodder is not scared of speed and would LOVE to take him .
Joined: Dec 2008
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From: Fayetteville, NC
Re: What Is YOUR Top Speed?
Originally Posted by tighed1
Cool!
My wife just covers her ears and closes her eyes when ever I mash the gas.
That's no fun.
My wife just covers her ears and closes her eyes when ever I mash the gas.
That's no fun.
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Joined: Feb 2008
Posts: 4,084
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From: Tennessee
Re: What Is YOUR Top Speed?
Originally Posted by Rv Xfire08
I have had my coupe only up to148 and wow what a smooth ride.not sure what Allen has had his roadster up to.He is not telling me lol. I sure would love to see us get it on together just to see who is the better driver lol.I know you guys will say Allen.lol but this old blond streetrodder is not scared of speed and would LOVE to take him .
I sure would love to see us get it on together just to see who is the better driver lol.I know you guys will say Allen.lol but this old blond streetrodder is not scared of speed and would LOVE to take him .
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Joined: Jan 2009
Posts: 975
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From: Savannah, Georgia
Re: What Is YOUR Top Speed?
Hmmm must be doing something wrong on my end of being a Car Fanatic!!! No man here!!! geeze!
Speed, not a problem, let me go and go fast, I'm loving it.....mods, not a problem... even HELPED my X build a hot rod.... and spotted a few small errors from this long time mechanic... just oversites, but I'm a stickler for the details... Oh well, such is life huh!
Deb
Speed, not a problem, let me go and go fast, I'm loving it.....mods, not a problem... even HELPED my X build a hot rod.... and spotted a few small errors from this long time mechanic... just oversites, but I'm a stickler for the details... Oh well, such is life huh!
Deb
Joined: Dec 2008
Posts: 266
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From: Fayetteville, NC
Re: What Is YOUR Top Speed?
Anybody here know if their is some kinda meet going down before the winter rolls in on the East Coast. I'm hoping one will so I can meet some of you guys on here before I venture off to Ft Bliss, Tx.
Joined: Apr 2009
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From: Omaha, Nebraska
Re: What Is YOUR Top Speed?
100 Even. I-80 has a stretch of interstate allowing 75mph just outside of Omaha; and they also have a LOT of State Troopers! Had severe adrenaline rush, so brought it back down (HA!) but do 80 frequently. You guys that have gone faster? My hat's off to ya! 
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From: Savannah, Georgia
Re: What Is YOUR Top Speed?
https://www.crossfireforum.org/forum...1-nov-1-a.html
Go to that thread, will tell you all about it... but basically it is in Fontana Village, NC and the road is called Deals Gap (US 129) 318 Curves in an 11 mile stretch.....
Oct 30, 31 and Nov 1 of this year!!
Sign up soon 58 Crossfires so far!
Deb
Go to that thread, will tell you all about it... but basically it is in Fontana Village, NC and the road is called Deals Gap (US 129) 318 Curves in an 11 mile stretch.....
Oct 30, 31 and Nov 1 of this year!!
Sign up soon 58 Crossfires so far!
Deb
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From: Savannah, Georgia
Re: What Is YOUR Top Speed?
Had "Quick Silver" up to 135 on the way home the other night at 3:00 in the morning, not a soul on the road.... then got to thinking about deer and slowed down. Not good to hit a deer at 135!!!
LOL Deb
LOL Deb
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From: homeless
Re: What Is YOUR Top Speed?
Originally Posted by dwightdmagee
Thanks for the tip.
In the winter, when it's not so godawful hot, I usually run sans the top and do keep an eye to the sky. The obvious warning, tho, is to play by the rules over stretches of pavement marked with the VASR lines.
BTW: It's amazing the things that can get sucked out of the cabin at 120-plus, so best keep your stuff stowed in the trunk. My primary dread of running Alligator Alley at a high rate of speed is just that - running over one of the damn things. Yikes.
But back to my question, can anybody explain to me how and why these cars are governed for speed right out of the box? I don't make a habit of cruising much over 5,000 rpm, but when I do, how and what does the ECU arbitrarily deploy to limit my speed to 150?
In the winter, when it's not so godawful hot, I usually run sans the top and do keep an eye to the sky. The obvious warning, tho, is to play by the rules over stretches of pavement marked with the VASR lines.
BTW: It's amazing the things that can get sucked out of the cabin at 120-plus, so best keep your stuff stowed in the trunk. My primary dread of running Alligator Alley at a high rate of speed is just that - running over one of the damn things. Yikes.
But back to my question, can anybody explain to me how and why these cars are governed for speed right out of the box? I don't make a habit of cruising much over 5,000 rpm, but when I do, how and what does the ECU arbitrarily deploy to limit my speed to 150?
Still learning.
Last edited by dwightdmagee; Aug 17, 2009 at 10:32 PM.
Joined: Dec 2008
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From: Fayetteville, NC
Re: What Is YOUR Top Speed?
Originally Posted by Deborah Walker
Had "Quick Silver" up to 135 on the way home the other night at 3:00 in the morning, not a soul on the road.... then got to thinking about deer and slowed down. Not good to hit a deer at 135!!!
LOL Deb
LOL Deb