2k2 Top Speed
Originally posted by jamiebooth
I have a stock 2k2 auto.
I was cruising down the interstate one day and decided to see what my car would come close to for top end.
So, I floored it!
Hit 6500 rpm in 3rd gear and then shifted to D.
It slowly was topping out in the low 130's. I didn't have the patience to see if it would go over 135mph. the interstate I was on is pretty flat here in IL too.
i had to know what it could do so I went home and put it up on jackstands. Hit the rev limiter in 'D' (drive) around 135mph. that sucked!!
I bought the car back in sept 01 and I think at that time I saw the new 2k2 max was supposed to do 153 mph top speed??
do you guys think my car has always topped out around 135mph cause it is an auto or do you think since the dealership replaced my gas pedal stopper and reprogrammed the computer that is why???
I have a stock 2k2 auto.
I was cruising down the interstate one day and decided to see what my car would come close to for top end.
So, I floored it!
Hit 6500 rpm in 3rd gear and then shifted to D.
It slowly was topping out in the low 130's. I didn't have the patience to see if it would go over 135mph. the interstate I was on is pretty flat here in IL too.
i had to know what it could do so I went home and put it up on jackstands. Hit the rev limiter in 'D' (drive) around 135mph. that sucked!!
I bought the car back in sept 01 and I think at that time I saw the new 2k2 max was supposed to do 153 mph top speed??
do you guys think my car has always topped out around 135mph cause it is an auto or do you think since the dealership replaced my gas pedal stopper and reprogrammed the computer that is why???
my Auto 4th gen hit 134 with LOTS of room left on the tach. only problem was, i ran out of road.
Senior Member
Joined: Sep 2001
Posts: 1,617
From: Detroit Metro Area
Originally posted by Dave B
I'll chime in and add a few things. I don't believe he was going 164mph in his Maxima. I have a hard time believing a 255hp Maxima is going to match the topend of a stock LS1 F-Body. The F-Body makes substainlly more HP and TQ and as perfectly matched gearing (1-5 not 6).
GPS Error-
I'm an environmental engineer and my firm does environmental work for the Air Force. I use GPS units to survey in borings, excavations, fuel lines, underground storage tanks, etc. The accuracy of these over the counter GPS is "good", but not great. On an hourly basis, my vertical (elevation) readings can vary from 15-60' and horizontal readings can vary by 10-30'. What this means is that you can have roughly a 60' X 60' space in which the GPS estimates your location. This kind of estimated location is great for an over the counter GPS because most people use GPS's to find large areas like fishing spots, camp grounds, shopping areas, excavations, etc. By over the counter, I'm talking about the units available for cars and hand helds. The Government DOES dither GPS signals for civial use. If you don't want to believe me, fine, but I've got a document sent directly to me concerning the use of GPS units on their projects. The document clearly states that the government dithers GPS signals therefore the Air Force requests that I also manually survey in locations because of the inaccuracy of a civilian GPS. I cannot post this document due to the client privilage.
The amount of inaccuracy in readings is more than enough to throw off MPH wildly.
Dave
I'll chime in and add a few things. I don't believe he was going 164mph in his Maxima. I have a hard time believing a 255hp Maxima is going to match the topend of a stock LS1 F-Body. The F-Body makes substainlly more HP and TQ and as perfectly matched gearing (1-5 not 6).
GPS Error-
I'm an environmental engineer and my firm does environmental work for the Air Force. I use GPS units to survey in borings, excavations, fuel lines, underground storage tanks, etc. The accuracy of these over the counter GPS is "good", but not great. On an hourly basis, my vertical (elevation) readings can vary from 15-60' and horizontal readings can vary by 10-30'. What this means is that you can have roughly a 60' X 60' space in which the GPS estimates your location. This kind of estimated location is great for an over the counter GPS because most people use GPS's to find large areas like fishing spots, camp grounds, shopping areas, excavations, etc. By over the counter, I'm talking about the units available for cars and hand helds. The Government DOES dither GPS signals for civial use. If you don't want to believe me, fine, but I've got a document sent directly to me concerning the use of GPS units on their projects. The document clearly states that the government dithers GPS signals therefore the Air Force requests that I also manually survey in locations because of the inaccuracy of a civilian GPS. I cannot post this document due to the client privilage.
The amount of inaccuracy in readings is more than enough to throw off MPH wildly.
Dave
I've brought this up once, and I will bring it up again. The gov't does not dither the GPS signal any more. SA has been turned off. However, this does not mean that civilian GPS is as accurate as military GPS. The Military uses something similar to Garmin's WAAS, but much more sophisticated that lets them know the wobble/drift in the satellites orbits. The wobble/drift in the orbit of the satellites is what causes the errors. You mention from hour to hour. Well that's just wonderful. How much does your position vary from second to second? I've played with some GPS recievers. From my experience it doesn't vary at all. As the unit picks up or loses satellites only then does the reading vary.
Having said all this, the distance between points taken 1 second apart (or whatever the internal timing is) is going to be very accurate. Simply because the error present in the GPS system will not affect that type of measurement.
Stereodude
Not DAVEB the parts guy
Joined: Aug 2000
Posts: 8,549
Originally posted by Stereodude
Dave,
I've brought this up once, and I will bring it up again. The gov't does not dither the GPS signal any more. SA has been turned off. However, this does not mean that civilian GPS is as accurate as military GPS. The Military uses something similar to Garmin's WAAS, but much more sophisticated that lets them know the wobble/drift in the satellites orbits. The wobble/drift in the orbit of the satellites is what causes the errors. You mention from hour to hour. Well that's just wonderful. How much does your position vary from second to second? I've played with some GPS recievers. From my experience it doesn't vary at all. As the unit picks up or loses satellites only then does the reading vary.
Having said all this, the distance between points taken 1 second apart (or whatever the internal timing is) is going to be very accurate. Simply because the error present in the GPS system will not affect that type of measurement.
Stereodude
Dave,
I've brought this up once, and I will bring it up again. The gov't does not dither the GPS signal any more. SA has been turned off. However, this does not mean that civilian GPS is as accurate as military GPS. The Military uses something similar to Garmin's WAAS, but much more sophisticated that lets them know the wobble/drift in the satellites orbits. The wobble/drift in the orbit of the satellites is what causes the errors. You mention from hour to hour. Well that's just wonderful. How much does your position vary from second to second? I've played with some GPS recievers. From my experience it doesn't vary at all. As the unit picks up or loses satellites only then does the reading vary.
Having said all this, the distance between points taken 1 second apart (or whatever the internal timing is) is going to be very accurate. Simply because the error present in the GPS system will not affect that type of measurement.
Stereodude
Dave
Newbie - Just Registered
Joined: Jul 2002
Posts: 2
Re: 2k2 Top Speed
Originally posted by akrus
I took a trip to NYC this past weekend and while on my way there, I had a nice stretch of open Interstate and decided to jump on the throttle. My previous top speed was ~240 km/h. That run was according to my speedometer as I didn't have my GPS with me. This time I made sure to have the GPS running.
In miles:
http://www3.sympatico.ca/akrusvar/2k2Max/Image1.jpg
In kilometers:
http://www3.sympatico.ca/akrusvar/2k2Max/Image2.jpg
Last time I looked at the speedo during this run, the needle was at about 250 km/h.
The car was very stable as the road was really smooth.
Albert
I took a trip to NYC this past weekend and while on my way there, I had a nice stretch of open Interstate and decided to jump on the throttle. My previous top speed was ~240 km/h. That run was according to my speedometer as I didn't have my GPS with me. This time I made sure to have the GPS running.
In miles:
http://www3.sympatico.ca/akrusvar/2k2Max/Image1.jpg
In kilometers:
http://www3.sympatico.ca/akrusvar/2k2Max/Image2.jpg
Last time I looked at the speedo during this run, the needle was at about 250 km/h.
The car was very stable as the road was really smooth.
Albert
Senior Member
Joined: Sep 2001
Posts: 1,617
From: Detroit Metro Area
Originally posted by Dave B
Thanks to US military action brought on by September 11, the signals are now being dithered once again. The system was turned off, but NOT REMOVED. If the government saw no need for the system in the future, they would have abandoned the system. When ever there is large US military action, the signal will be dithered.
Dave
Thanks to US military action brought on by September 11, the signals are now being dithered once again. The system was turned off, but NOT REMOVED. If the government saw no need for the system in the future, they would have abandoned the system. When ever there is large US military action, the signal will be dithered.
Dave
Stereodude
Member
Joined: May 2002
Posts: 168
Originally posted by jamiebooth
I have a stock 2k2 auto.
I was cruising down the interstate one day and decided to see what my car would come close to for top end.
So, I floored it!
Hit 6500 rpm in 3rd gear and then shifted to D.
It slowly was topping out in the low 130's. I didn't have the patience to see if it would go over 135mph. the interstate I was on is pretty flat here in IL too.
i had to know what it could do so I went home and put it up on jackstands. Hit the rev limiter in 'D' (drive) around 135mph. that sucked!!
I bought the car back in sept 01 and I think at that time I saw the new 2k2 max was supposed to do 153 mph top speed??
do you guys think my car has always topped out around 135mph cause it is an auto or do you think since the dealership replaced my gas pedal stopper and reprogrammed the computer that is why???
I have a stock 2k2 auto.
I was cruising down the interstate one day and decided to see what my car would come close to for top end.
So, I floored it!
Hit 6500 rpm in 3rd gear and then shifted to D.
It slowly was topping out in the low 130's. I didn't have the patience to see if it would go over 135mph. the interstate I was on is pretty flat here in IL too.
i had to know what it could do so I went home and put it up on jackstands. Hit the rev limiter in 'D' (drive) around 135mph. that sucked!!
I bought the car back in sept 01 and I think at that time I saw the new 2k2 max was supposed to do 153 mph top speed??
do you guys think my car has always topped out around 135mph cause it is an auto or do you think since the dealership replaced my gas pedal stopper and reprogrammed the computer that is why???
Seeing the wheels spinning like crazy inches off the road, hahahah!!
Must be awesome!
Oh yeah, since its an open differential, it should be safe to stop one wheel with your bare hand right?...I'm too chicken to try it myself.
hmm...i had a picture unfortunately i thought it was garbage. But anyway...i was driving back from LA..(stillen day) I had my Garmin Gps STreet pilot 3..the one with a color screen and speaker. The faster I drove...the bigger the difference between the GPS and speedo.
At one point...going 130 on my speedo..my GPS registered at 141...i did that for about 30 seconds...seeing if anything would change...my antenna is an aux unit with it suction cupped on my windshield. So..whos wrong..my speedo or my GPS.
At one point...going 130 on my speedo..my GPS registered at 141...i did that for about 30 seconds...seeing if anything would change...my antenna is an aux unit with it suction cupped on my windshield. So..whos wrong..my speedo or my GPS.
Originally posted by chinaonnitrous1
hmm...i had a picture unfortunately i thought it was garbage. But anyway...i was driving back from LA..(stillen day) I had my Garmin Gps STreet pilot 3..the one with a color screen and microphone. The faster I drove...the bigger the difference between the GPS and speedo.
At one point...going 130 on my speedo..my GPS registered at 141...i did that for about 30 seconds...seeing if anything would change...my antenna is an aux unit with it suction cupped on my windshield. So..whos wrong..my speedo or my GPS.
hmm...i had a picture unfortunately i thought it was garbage. But anyway...i was driving back from LA..(stillen day) I had my Garmin Gps STreet pilot 3..the one with a color screen and microphone. The faster I drove...the bigger the difference between the GPS and speedo.
At one point...going 130 on my speedo..my GPS registered at 141...i did that for about 30 seconds...seeing if anything would change...my antenna is an aux unit with it suction cupped on my windshield. So..whos wrong..my speedo or my GPS.
I've emailed Garmin last night to see what they have to say about the accuracy of the Max Speed reading of GPS units. I'll post the response when I get it.
BTW, there's a microphone on your GPS? Did you mean speaker? I can't imagine what a microphone would be used for on a GPS.
Albert
Senior Member
Joined: Sep 2001
Posts: 1,617
From: Detroit Metro Area
Originally posted by akrus
I've emailed Garmin last night to see what they have to say about the accuracy of the Max Speed reading of GPS units. I'll post the response when I get it.
Albert
I've emailed Garmin last night to see what they have to say about the accuracy of the Max Speed reading of GPS units. I'll post the response when I get it.
Albert
Stereodude
Originally posted by akrus
I know that my Etrex Legend is dead on with my Maxima speedo up to 200 km/h as I have checked it at speeds up to that point. Mind you, this doesn't mean that it would still be that way each and every time, if what others in this thread have said about GPS inaccuracies are true.
I've emailed Garmin last night to see what they have to say about the accuracy of the Max Speed reading of GPS units. I'll post the response when I get it.
I know that my Etrex Legend is dead on with my Maxima speedo up to 200 km/h as I have checked it at speeds up to that point. Mind you, this doesn't mean that it would still be that way each and every time, if what others in this thread have said about GPS inaccuracies are true.
I've emailed Garmin last night to see what they have to say about the accuracy of the Max Speed reading of GPS units. I'll post the response when I get it.
BTW, there's a microphone on your GPS? Did you mean speaker? I can't imagine what a microphone would be used for on a GPS.
Albert
Originally posted by TimW
the thing is this, max speed will not reject a wild, of the wall reading, it will just be calculated. Hence the variance in max speed, even tho just 'speed' stays accurate. If it thinks you are on the next block for even a half second, it will calculate your max speed like you just hyperspaced over there. I would like to see them use 'speed' for maxspeed and reject any values that are obviously 10X higher for 1 second. I think only UFO's can move like that.
the thing is this, max speed will not reject a wild, of the wall reading, it will just be calculated. Hence the variance in max speed, even tho just 'speed' stays accurate. If it thinks you are on the next block for even a half second, it will calculate your max speed like you just hyperspaced over there. I would like to see them use 'speed' for maxspeed and reject any values that are obviously 10X higher for 1 second. I think only UFO's can move like that.
The SP3 give spoken NAV directions, hence the speaker. My GPS V is essentially a SP3 without voice and color. I miss the color, but the SP3 was just too big to actually carry hiking or boating. But I do love the routing of the V and Sp3. So long bulky Laptop and IPAQ cable mess.
Until I hear from a tech at Garmin or some other tech such as that, I am going to believe my GPS reading of 164 mph +/- some sort of error margin. This just made me think, all this time, the naysayers are claiming that the error is resulting in too high of a reading. If GPS is inaccurate, it is possible that the reading is too low then. Until there is some other way to verify the top end speed of the 2k2 Max 6spd, I have myself convinced that I have run it to the highest speed attained by any Maxima that I know of.
Albert
Originally posted by akrus
I know that my Etrex Legend is dead on with my Maxima speedo up to 200 km/h as I have checked it at speeds up to that point. Mind you, this doesn't mean that it would still be that way each and every time, if what others in this thread have said about GPS inaccuracies are true.
I've emailed Garmin last night to see what they have to say about the accuracy of the Max Speed reading of GPS units. I'll post the response when I get it.
BTW, there's a microphone on your GPS? Did you mean speaker? I can't imagine what a microphone would be used for on a GPS.
Albert
I know that my Etrex Legend is dead on with my Maxima speedo up to 200 km/h as I have checked it at speeds up to that point. Mind you, this doesn't mean that it would still be that way each and every time, if what others in this thread have said about GPS inaccuracies are true.
I've emailed Garmin last night to see what they have to say about the accuracy of the Max Speed reading of GPS units. I'll post the response when I get it.
BTW, there's a microphone on your GPS? Did you mean speaker? I can't imagine what a microphone would be used for on a GPS.
Albert
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