speed limiter

Jim,
The engine is rev limited and will shut down cylinders to keep it from
over reving. 85 MPH in a 250? Sounds a little unstable to me
Michelle

James Gillespie wrote:

 >I have a 99 F-250 SD with the 5.4l and was running down the highway with my
 >buddy in his F-250 SD with the 6.0l. he had the jump on me so I slammed it
 >to the floor and was catching quickly only to find my truck seemed to shut
 >down at 85mph.
 >
 >Are the 5.4 limited? I know, I know I shouldn't be doing 85mph but the
 >thought of being out run by a diesel has me bummed..
 >
 >thank
 >Jim (the speed demon)
 >
 >
 >
 >

--

Michelle P ATP-ASEL, CP-AMEL, and AMT-A&P

"Elisabeth" a Maule M-7-235B (no two are alike)

Volunteer Pilot, Angel Flight Mid-Atlantic

Volunteer Builder, Habitat for Humanity<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: speed limiter 

Speed limited because of tires. Shouldn't matter id it's gas or diesel.
"James Gillespie" <gillespieranch.TakeThisOut@verizon.net> wrote in message
news:hKfSc.7012$AA1.5645@trndny06...
 > I have a 99 F-250 SD with the 5.4l and was running down the highway with
my
 > buddy in his F-250 SD with the 6.0l. he had the jump on me so I slammed it
 > to the floor and was catching quickly only to find my truck seemed to shut
 > down at 85mph.
 >
 > Are the 5.4 limited? I know, I know I shouldn't be doing 85mph but the
 > thought of being out run by a diesel has me bummed..
 >
 > thank
 > Jim (the speed demon)
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: speed limiter 

James Gillespie wrote:

 > I have a 99 F-250 SD with the 5.4l and was running down the highway with my
 > buddy in his F-250 SD with the 6.0l. he had the jump on me so I slammed it
 > to the floor and was catching quickly only to find my truck seemed to shut
 > down at 85mph.
 >
 > Are the 5.4 limited? I know, I know I shouldn't be doing 85mph but the
 > thought of being out run by a diesel has me bummed..
 >
 > thank
 > Jim (the speed demon)
 >
 >
You are incorrect! NEITHER of you should be doing 85!<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: speed limiter 

On Wed, 11 Aug 2004 02:44:29 GMT, "James Gillespie"
<gillespieranch.DeleteThis@verizon.net> wrote:

 >I have a 99 F-250 SD with the 5.4l and was running down the highway with my
 >buddy in his F-250 SD with the 6.0l. he had the jump on me so I slammed it
 >to the floor and was catching quickly only to find my truck seemed to shut
 >down at 85mph.
 >
 >Are the 5.4 limited? I know, I know I shouldn't be doing 85mph but the
 >thought of being out run by a diesel has me bummed..
 >
 >thank
 >Jim (the speed demon)
 >


With the exception of some high performance vehicles, almost
all are limited with respect to both road speed and engine
RPM. Road speed is generally limited to the rating of the
tires installed by the manufacturer or powertain components
such as the drive shaft. Engine RPM is limited to the max
safe for the engine or torque converter.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: speed limiter 

I use the Hypertech Stage III tuner with my '99 F350 SD PSD, there is no
longer any limit on top speed or rpm. You have to be careful, but that's
what we were before we had computers to "keep us under control".

Spdloader




"James Gillespie" <gillespieranch.TakeThisOut@verizon.net> wrote in message
news:hKfSc.7012$AA1.5645@trndny06...
 > I have a 99 F-250 SD with the 5.4l and was running down the highway with
my
 > buddy in his F-250 SD with the 6.0l. he had the jump on me so I slammed it
 > to the floor and was catching quickly only to find my truck seemed to shut
 > down at 85mph.
 >
 > Are the 5.4 limited? I know, I know I shouldn't be doing 85mph but the
 > thought of being out run by a diesel has me bummed..
 >
 > thank
 > Jim (the speed demon)
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: speed limiter 

As a professional 'emergency operations' driver. I can attest to the fact of
how unstable SUV's and pickups get at high speeds. The rear end on a pickup
will not have any 'drag' and will actually float up around 85 to 90. I have
proven this. The bed acts as a sail and will lift the rear end up and thus
no traction. SUV's area bit different, but the same principle works. They
are not made to be aerodynamic at all (think brick with wheels) the drag
behind them at a high speed will cause the rearend to sway and slide.
I do indeed drive a 2001 F250 extcab SB with the 5.4 motor. Under controlled
and professional conditions, I found my cutoff the be 91mph. With more
testing, i discovered that ther was only a 25 to 30% traction efficiency at
the rear tires. Not enough if I had to do any kind of maneuver. Stick to
cars that are made to go fast if you want to actually go fast.


"James Gillespie" <gillespieranch.RemoveThis@verizon.net> wrote in message
news:hKfSc.7012$AA1.5645@trndny06...
 > I have a 99 F-250 SD with the 5.4l and was running down the highway with
my
 > buddy in his F-250 SD with the 6.0l. he had the jump on me so I slammed it
 > to the floor and was catching quickly only to find my truck seemed to shut
 > down at 85mph.
 >
 > Are the 5.4 limited? I know, I know I shouldn't be doing 85mph but the
 > thought of being out run by a diesel has me bummed..
 >
 > thank
 > Jim (the speed demon)
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: speed limiter 

I've had my '03 Supercrew well over 100 using a Superchips Microtuner to
raise/remove the limiter.

SMC


"My Own Little Universe" <nicetry RemoveThis @aol.com> wrote in message
news:BozSc.13472$Kt5.5545@twister.nyroc.rr.com...
 > As a professional 'emergency operations' driver. I can attest to the fact
of
 > how unstable SUV's and pickups get at high speeds. The rear end on a
pickup
 > will not have any 'drag' and will actually float up around 85 to 90. I
have
 > proven this. The bed acts as a sail and will lift the rear end up and thus
 > no traction. SUV's area bit different, but the same principle works. They
 > are not made to be aerodynamic at all (think brick with wheels) the drag
 > behind them at a high speed will cause the rearend to sway and slide.
 > I do indeed drive a 2001 F250 extcab SB with the 5.4 motor. Under
controlled
 > and professional conditions, I found my cutoff the be 91mph. With more
 > testing, i discovered that ther was only a 25 to 30% traction efficiency
at
 > the rear tires. Not enough if I had to do any kind of maneuver. Stick to
 > cars that are made to go fast if you want to actually go fast.
 >
 >
 > "James Gillespie" <gillespieranch RemoveThis @verizon.net> wrote in message
 > news:hKfSc.7012$AA1.5645@trndny06...
  > > I have a 99 F-250 SD with the 5.4l and was running down the highway with
 > my
  > > buddy in his F-250 SD with the 6.0l. he had the jump on me so I slammed
it
  > > to the floor and was catching quickly only to find my truck seemed to
shut
  > > down at 85mph.
  > >
  > > Are the 5.4 limited? I know, I know I shouldn't be doing 85mph but the
  > > thought of being out run by a diesel has me bummed..
  > >
  > > thank
  > > Jim (the speed demon)
  > >
  > >
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: speed limiter 

I would like to thank all for the responses.

to RLB and his reason 412 - still not enough for me to spend an additional
$5000 on the diesel. My 5.4 has 240,000 miles, gets 14.5mpg and would take
that 6.0l off the line day in and day out.

to the rest - I just wanted to know if there was a limiter or not? I know I
shouldn't be doing 85 that wasn't the point. My buddy has had his diesel up
over a 100, again not the brightest move, but he didn't hit an limiter?

again thanks for the responses

Jim

"James Gillespie" <gillespieranch RemoveThis @verizon.net> wrote in message
news:hKfSc.7012$AA1.5645@trndny06...
 > I have a 99 F-250 SD with the 5.4l and was running down the highway with
my
 > buddy in his F-250 SD with the 6.0l. he had the jump on me so I slammed it
 > to the floor and was catching quickly only to find my truck seemed to shut
 > down at 85mph.
 >
 > Are the 5.4 limited? I know, I know I shouldn't be doing 85mph but the
 > thought of being out run by a diesel has me bummed..
 >
 > thank
 > Jim (the speed demon)
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: speed limiter 

On Thu, 12 Aug 2004 01:06:41 GMT, "My Own Little Universe" <nicetry.RemoveThis@aol.com>
wrote:

||As a professional 'emergency operations' driver. I can attest to the fact of
||how unstable SUV's and pickups get at high speeds. The rear end on a pickup
||will not have any 'drag' and will actually float up around 85 to 90. I have
||proven this. The bed acts as a sail and will lift the rear end up and thus
||no traction. SUV's area bit different, but the same principle works. They
||are not made to be aerodynamic at all (think brick with wheels) the drag
||behind them at a high speed will cause the rearend to sway and slide.
||I do indeed drive a 2001 F250 extcab SB with the 5.4 motor. Under controlled
||and professional conditions, I found my cutoff the be 91mph. With more
||testing, i discovered that ther was only a 25 to 30% traction efficiency at
||the rear tires. Not enough if I had to do any kind of maneuver. Stick to
||cars that are made to go fast if you want to actually go fast.

James
A few years ago GM built a S-15 Bonnevile record truck. It was an extended
cab longbed. They found that the best aero package for the bed consisted of a
hard tonneau cover from about 2 feet behind the cab extending to the tailgate. A
verticle panel blocked the front of the covered space. This negated most of
the lift and drag.
Texas Parts Guy
 >> Stay informed about: speed limiter 

Guys, my experience is with an 01 F150 SuperCab XLT with 5.4L and i hit 110
on a straight run and did not expereince any problems with handling or speed
limiting of the truck. i did it alone at dusk with no other vehicles around
me. i just wanted to see how fast she could go, i beleive she could have
gone faster as i was at about 3700 RPMs. As an FYI my 04 F150 SuperCrew runs
2k RPM at 75 mph which is the avaerage commute speed to keep up with
everyone else here so im believing she may have a higher top end.


"James Gillespie" <gillespieranch.RemoveThis@verizon.net> wrote in message
news:hKfSc.7012$AA1.5645@trndny06...
 > I have a 99 F-250 SD with the 5.4l and was running down the highway with
my
 > buddy in his F-250 SD with the 6.0l. he had the jump on me so I slammed it
 > to the floor and was catching quickly only to find my truck seemed to shut
 > down at 85mph.
 >
 > Are the 5.4 limited? I know, I know I shouldn't be doing 85mph but the
 > thought of being out run by a diesel has me bummed..
 >
 > thank
 > Jim (the speed demon)
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: speed limiter