Let see what these gt and gtps top speed are! List your fastest top speed. And what you have done.

Mine would be 131mph but my current speed limiter is 142mph.

fastest iv done---135

mine is 127, but i still have the speed limiter

it's not how fast you go it's how fast you get there........
GT-108 still have the original pcm.

sorry about that i forgot I have a limiter and i can only do 128 mph and i dont know what my 1/4mile time is yet. Im just wondering about what everybody else does. And what i ment was whats the fastest speed these people have gone in there own vehicles and what mods* they have done. sorry I didnt relize that i didnt put it in the first post.

180...KPH that is :)

bone stock 1 week old 142mph....please dont tell the wife. however i have to sadly admit it did take a bit to get there especially after you hit 120. also if your valentine one or escort passport 8500(better than valentine in my opinion) start to violently chirp at 140 that morris would then be a good time to try out those fancy red calipers.

In my case 145.

Mph

IF you mean what I have done? Well I had my crappy whistler on. An Acura Integra came raoring down the highway because he saw my alteza taillights. I floored the pedal to the metal and released it when the Acura stopped gaining on me. The odo was showing 145Mph and was reving around 4800 mark. I think the car could have go a little higher but did not pushed it...

Correction, HUD showed 145mph. Odo just marks 115mph. Sorry

Ok well you were doing less tha 115mph then. Your HUD is VERY inaccurate. You should get that looked at.

Nahh, do not think so. The needle was restting on the 115mph. The odo is electric and would not show anything higher than that. And all the speeds reported here I am pretty sure were looking at the hood not the odo

That is the crap with electric odometers. I remember a friends 69 tang when the needle would go all over the 120mph and turn to reach almost 0 again. That was fun. Eletric odos(analog wanabys) take the fun out of it

Dude What Are You Talking About The Hud Being Innacurate? Maybe You Should Call Boeing In Seattle Wa. And Tell That To Them.

A HUD in a car is no where near the same as in an aircraft.

The manufacturer has to build in a certin % of errior. Meaning that when you are travling 60mph(indicated by the HUD0 you are really travling 58 or so.

And Boeing did not design the HUD in the Grand Prix.

ok, if that is the case it would be more accurate for you to say ~145? Then if you want to assume a 5mph error then you can say I was driving at 140MPH.

No say what you registed on the HUD, I was just confused. I though you had an aftermarket option. Im not really familiar with the cars.

Thats why i said that your tach was right, but you explained that it stops at 115. Its all good you were doing 145 +or- a few.

Ok i know nothing about electronics however i do drive truck for alcoa aluminum(aircraft aluminum) and actually i was talking to some pen pushing white collar dork at boeing in wichita ks. 1 day about cars and he told me that a friend of his at the wich. plant and another dude at the seattle plant were in works with GM designers on the huds when they first started to use them. I wanted to quiz this guy to see if he was serious so i started to drill him on questions but i myself didnt know much about them but he did tell me that he thought they were working on the 89 olds cutlass supremes but wasnt sure. So case in point if any of this is true there is some very good technology in these things and mine seems dead on with my speedo in my 04 comp g so now i have to go to my local pontiac dealership and tell them both my speedo and hud are off? However i do agree that at some point in time in certain vehicles 1-2 mph sounds viable.

The only thing that Boeing would have helped with would have been how to display the acutal figures on the screen. And ideas for electronics. The only contributed info. I did a search and Boeing was only mentioned to contribute info to the construction of the system not actual manufacturing of it. But the idea is sound.

And ALL cars have a built in % of error. Tehy have to do that for safty purposes. That is the reason that (when photoradrr was out) you can go about 5kmh over the speed limit and still not get a ticket. Its like that because the radar registers your actual speed that you are travling, and not the speed that is registered in the car.

You could take the car the the dealer and tell them that but they are not allowed to change it. Even the new lambos are like this, and at Weissach(where i work) we have to check this calibration with a computer.

GP and Vettes have HUD's and they are not aftermarket. They are OEM options. If you check the 97-00 GP you will see that the odo has a small pin just after 115mph. I know that an electronic(analog mimicking) odo could be stopped at whatever speed you want but they have this pin that holds the needle. The same with the gas tank needle. Look at it closely and you will see the small pin there as well. The HUD on the other hand reports the ECU(PCM) speed sensor reading straight to the bone...

Your not getting it, ITS NOT 100% ACCURATE.

The ECU is programed to be off by a certin % according to the speed you are travling. As you increase the speed of your car the % increases. It is in all cars. This % can be effected by equiping larger than stock wheels as well. But the HUD does not display the exact speed.

If you would like proof take your car to a track and take a radar gun. Now go 80mph(as displayed on the HUD) on the straight(to amplify the effect so it is easily noticed) and you will not have the same reading on the radar gun. It will be slower.

Even the worlds fastest car does this. The McLaren F1 does not register 231mph when it is actualy travling 231mph, it will register a higher number on the guage.

I get it, I know about the error margin introduced on purpose to the vehicles. What I understood that you tought that the analog like electronic odo was a real analog odo. So you can tell for sure taking into consideration a ~5MPH that I was driving at 140MPH because the hud displays whatever the ECU(PCM) tells it to display with the error margin or not. Buddy, you sound like a nice person. I will leave it here. In my case to what pertains to this post I have seen ~145mph on my HUD. :)

Sorry to this thread. So based on what we know on error margins it is healthy to assume that everyone is reporting their stuff with the same or similar error margin ;)

I am really a nice person. I just received 4 PM's on this topic and wanted to clarify the inco. Not posting to outwit someone just posting what i know to be fact.

And yes i was confused about the speedo and HUd, but than you for clarifing that for me. I learn something new each day. I really do appreciate that, and am sorry if i offended anyone, wasent my intention.

Is not a point of offending or not. Is more like entering on dry arguemnts for stuff that really who cares. This was about vehicle reported speeds, the latest posts can pertain to a wholde different subject

Currently, my top speed is 200kph. DHP is on the way. Does anyone know the speed limiter on v1.0? If not, I will let you know. I drive unlimited autobahn daily.

I think DHP jacks it up to 200mph.

I have read on http://www.zzperformance.com and http://www.pfyc.com and non of them specify that the cap is 200mph, all they state is that the PCM's would get rid of the speed limiter...

Ive hit 148 two times last summer 03....of course i have more "topend"mods now and it was hot out, so im sure in this cold weather would be 155+, but my winter tires are only rated 99mphQ speed so i cant really go test it out, lol. but they move with mods :grinno:

A HUD in a car is no where near the same as in an aircraft.

The manufacturer has to build in a certin % of errior. Meaning that when you are travling 60mph(indicated by the HUD0 you are really travling 58 or so.

And Boeing did not design the HUD in the Grand Prix.

oooh,, we have a nissan owner telling us how OUR GTPs are....btw, i had my budies 00 vette pace me at 130mph, his HUD shows 130, his speedometer shows 130, and my hud shows 130/131 so theyre within a 1mph accuracy, maybe its just because your car doesnt have one your too jealous. :screwy:

Ramair, the Nissan folk is learning about GP's.

89Turbo944, there is a forced question. Have you had a casualty with a GTP or GT lately? I mean you were not expecting it that fast or hard start or something? That is a good one ramair. Maybe something happen to him and he wants to learn about what happen. 89 please share with us.

If those cars in his sig are his then I highly doubt he'd have trouble wilth a GTP

I'd sell my car right now for a 300z tt