195 mph
07-29-2012, 10:57 AM
#77
2) Tyre diameter is variable. Thread depth, pressure, heat and speed will have an effect on tire diameter. Tire will be taller at 300km/h than 100km/h and hence giving a bigger diameter. And so in theory, the error at 300km/h will be lower than 100kmh. Diameter on same tire size between different tire makers is also different.
07-29-2012, 11:08 AM
#78
Burning Brakes
GT3 RS 4.0L roadtest. Look at the test data:
http://www.roadandtrack.com/var/ezfl...0acf3a2427.pdf
Yes 8500 in 6th = 193 mph. In the article they even talk about seeing 200 mph on the speedo while it is gear limited to 193.
http://www.roadandtrack.com/var/ezfl...0acf3a2427.pdf
Yes 8500 in 6th = 193 mph. In the article they even talk about seeing 200 mph on the speedo while it is gear limited to 193.
07-29-2012, 01:04 PM
#80
Burning Brakes
Ensuing on the GB license/registration/number plate system (ex wiki), bolded section is germane to what is a "60 plate":
The current system for Great Britain was introduced on 1 September 2001. Each registration index consists of seven characters with a defined format.
From left to right, the characters consist of:
A local memory tag or area code, consisting of two letters which together indicate the local registration office. The letters I, Q and Z are not used as local office identifiers; Z can be used only as a random letter.
The first of these two letters is a mnemonic standing for the name of the broad area where the registration office is located. This is intended to make the registration more memorable than an arbitrary code.[5][6] For example, A is used as the first character in all registrations issued by the three offices located in the vicinity of East Anglia;
A two-digit age identifier, which changes twice a year, in March and September. The code is either the last two digits of the year itself if issued between March and August (e.g. "10" for registrations issued between 1 March and 31 August 2010, that is reflecting the start of the 10th year of this registration schema), or else has 50 added to that value if issued between September and February the following year (e.g. "60" for registrations issued between 1 September 2010 and 28 February 2011);
A three-letter sequence which uniquely distinguishes each of the vehicles displaying the same initial four-character area and age sequence. The letters I and Q are excluded from the three-letter sequence, as are combinations that may appear offensive (including those in foreign languages).
further here: http://en.wikipedia.org/wiki/Vehicle...United_Kingdom
The current system for Great Britain was introduced on 1 September 2001. Each registration index consists of seven characters with a defined format.
From left to right, the characters consist of:
A local memory tag or area code, consisting of two letters which together indicate the local registration office. The letters I, Q and Z are not used as local office identifiers; Z can be used only as a random letter.
The first of these two letters is a mnemonic standing for the name of the broad area where the registration office is located. This is intended to make the registration more memorable than an arbitrary code.[5][6] For example, A is used as the first character in all registrations issued by the three offices located in the vicinity of East Anglia;
A two-digit age identifier, which changes twice a year, in March and September. The code is either the last two digits of the year itself if issued between March and August (e.g. "10" for registrations issued between 1 March and 31 August 2010, that is reflecting the start of the 10th year of this registration schema), or else has 50 added to that value if issued between September and February the following year (e.g. "60" for registrations issued between 1 September 2010 and 28 February 2011);
A three-letter sequence which uniquely distinguishes each of the vehicles displaying the same initial four-character area and age sequence. The letters I and Q are excluded from the three-letter sequence, as are combinations that may appear offensive (including those in foreign languages).
further here: http://en.wikipedia.org/wiki/Vehicle...United_Kingdom
07-29-2012, 07:08 PM
#81
There are other variables when it comes to top speed.
1) Wind condition. Head wind or tail wind can make a huge difference.
2) Tyre diameter is variable. Thread depth, pressure, heat and speed will have an effect on tire diameter. Tire will be taller at 300km/h than 100km/h and hence giving a bigger diameter. And so in theory, the error at 300km/h will be lower than 100kmh. Diameter on same tire size between different tire makers is also different.
3) All cars I have owned or own have speedo error. So reading their relative difference is good enough for me.
1) Wind condition. Head wind or tail wind can make a huge difference.
2) Tyre diameter is variable. Thread depth, pressure, heat and speed will have an effect on tire diameter. Tire will be taller at 300km/h than 100km/h and hence giving a bigger diameter. And so in theory, the error at 300km/h will be lower than 100kmh. Diameter on same tire size between different tire makers is also different.
3) All cars I have owned or own have speedo error. So reading their relative difference is good enough for me.
07-29-2012, 07:50 PM
#82
Race Car
OdbII speed is much closer to gps than the displayed speed - per my solo dl.
So ecu know the right speed, just display is skewed higher for regulatory reasons.
?? anyone know a way to make the displayed speed 'correct'??
would be useful for driving and watching actual vs analysed speeds on exit etc...
Ps - thanks to OP for at least getting those 3 pics a few pages back posted - I chuckled on th first one but by the third I was in fits lol - all time classic for the pic thread
So ecu know the right speed, just display is skewed higher for regulatory reasons.
?? anyone know a way to make the displayed speed 'correct'??
would be useful for driving and watching actual vs analysed speeds on exit etc...
Ps - thanks to OP for at least getting those 3 pics a few pages back posted - I chuckled on th first one but by the third I was in fits lol - all time classic for the pic thread
