Performance Meters
Discussion
If you've thought about getting one these:
http://www.performancebox.co.uk/
I'd also have a look at one of these:
http://www.radar-detectors.co.uk/g_force_timer.asp?source=gforce&gclid=CJLFtIKVn48CFQw4QgodpVz3fw
or
http://www.amazon.com/Passport-G-Timer-Vehicle-Performance-Computer/dp/B00012O7EM
I've just bought a G-Timer and it's very easy to use. The performance box only appears to give numbers to the nearest 10th of a second whereas the G-Timer gives times to 100ths of a second. The G-Timer doesn't look as good as the performance box, but it is much cheaper. It seems to be a product that is more widely used in the States and people using it have found it to give 1/4 mile times within 1/100th of a second compared to a drag strip time.
Does anyone else have any experience of using a G-Timer ?
http://www.performancebox.co.uk/
I'd also have a look at one of these:
http://www.radar-detectors.co.uk/g_force_timer.asp?source=gforce&gclid=CJLFtIKVn48CFQw4QgodpVz3fw
or
http://www.amazon.com/Passport-G-Timer-Vehicle-Performance-Computer/dp/B00012O7EM
I've just bought a G-Timer and it's very easy to use. The performance box only appears to give numbers to the nearest 10th of a second whereas the G-Timer gives times to 100ths of a second. The G-Timer doesn't look as good as the performance box, but it is much cheaper. It seems to be a product that is more widely used in the States and people using it have found it to give 1/4 mile times within 1/100th of a second compared to a drag strip time.
Does anyone else have any experience of using a G-Timer ?
The accuracy of a GPS based system is all down to the GPS 'engine' as far as I can make out.
The Racelogic unit is based on the VBox. The VBox is used by most of the magazines to measure speeds, as such I'd trust it to be pretty accurate, and measures position evert 1/10 sec.
I've just ordered, or rather my wife has, a Performance Box as a Christmas prezzie.
The P'Box has many useful features, data logging, abulity to overlay plots, can be linked with Google Earth, sprint and lap timing etc.
Can't wait to get my hands on it.
Tim
The Racelogic unit is based on the VBox. The VBox is used by most of the magazines to measure speeds, as such I'd trust it to be pretty accurate, and measures position evert 1/10 sec.
I've just ordered, or rather my wife has, a Performance Box as a Christmas prezzie.
The P'Box has many useful features, data logging, abulity to overlay plots, can be linked with Google Earth, sprint and lap timing etc.
Can't wait to get my hands on it.
Tim
Edited by TT Tim on Sunday 21st October 12:04
I used to have a g-meter thingie, and it was very very good, tried it in a number of cars and once you enter the kerb weight of the vehicle etc it can do some cool sums for acceleration and guestimates of RWHP too (obviously nowhere near 100% accurate but were all within 5-10% on the cars I tried it in)
Nice little toy, but no laptime features which is the only thing I can see having any "longevity" in a device like this.
Nice little toy, but no laptime features which is the only thing I can see having any "longevity" in a device like this.
davido140 said:
I used to have a g-meter thingie, and it was very very good, tried it in a number of cars and once you enter the kerb weight of the vehicle etc it can do some cool sums for acceleration and guestimates of RWHP too (obviously nowhere near 100% accurate but were all within 5-10% on the cars I tried it in)
Nice little toy, but no laptime features which is the only thing I can see having any "longevity" in a device like this.
I'll look it up, but I'm sure the new version that I have can record lap times. I've had a brief play with it, but I need to get on an airfield or drag strip to utilise it fully.Nice little toy, but no laptime features which is the only thing I can see having any "longevity" in a device like this.
Another option is
http://www.race-technology.com/dl1_2_27.html
It can bought with a option G meter. you can also link it to one of these.
http://www.race-technology.com/dash2_2_31.html
We are going to be using them for the Dunlop challange next year.
http://www.race-technology.com/dl1_2_27.html
It can bought with a option G meter. you can also link it to one of these.
http://www.race-technology.com/dash2_2_31.html
We are going to be using them for the Dunlop challange next year.
).TVRleigh_BBWR said:
Another option is
http://www.race-technology.com/dl1_2_27.html
It can bought with a option G meter. you can also link it to one of these.
http://www.race-technology.com/dash2_2_31.html
We are going to be using them for the Dunlop challange next year.
Leigh the DL1 comes with Gmeters in as standard, you can upgrade from 2 to 6g at a price (the option shown on you link). However if you're getting 6g from your BBWR you're either god or have just found the tyre barriers.http://www.race-technology.com/dl1_2_27.html
It can bought with a option G meter. you can also link it to one of these.
http://www.race-technology.com/dash2_2_31.html
We are going to be using them for the Dunlop challange next year.
Bloody good bit of kit.
Regards
Iain
Chassis 33 said:
TVRleigh_BBWR said:
Another option is
http://www.race-technology.com/dl1_2_27.html
It can bought with a option G meter. you can also link it to one of these.
http://www.race-technology.com/dash2_2_31.html
We are going to be using them for the Dunlop challange next year.
Leigh the DL1 comes with Gmeters in as standard, you can upgrade from 2 to 6g at a price (the option shown on you link). However if you're getting 6g from your BBWR you're either god or have just found the tyre barriers.http://www.race-technology.com/dl1_2_27.html
It can bought with a option G meter. you can also link it to one of these.
http://www.race-technology.com/dash2_2_31.html
We are going to be using them for the Dunlop challange next year.
Bloody good bit of kit.
Regards
Iain
as im no god. plus still trying to get an engine, so only way I'll get some G out of it is if I push it :lol:I'm also in the market for something at the moment, possibly in readiness for a trackday next week.
My concern is the data sample intervals though, the 10Hz engine on the PerformanceBox gives 10 samples a second which is why I guess they only report to .1 of a second, I'd also imagine that the G-Timer only records at 10Hz although I can't find any details of this (Simon, could you confirm mate?) so while it shows down to .01 of second this will only be based upon the start time and .1s intervals beyond this.
I guess the main features after this is usability there and then, such as setting and checking lap times there and then rather than requiring a laptop to see them.
Once the data is out of the box then slicing and dicing can be performed, whether by the supplied software or something else, in theory knocking something to do what you want wouldn't be a huge amount of effort.
My concern is the data sample intervals though, the 10Hz engine on the PerformanceBox gives 10 samples a second which is why I guess they only report to .1 of a second, I'd also imagine that the G-Timer only records at 10Hz although I can't find any details of this (Simon, could you confirm mate?) so while it shows down to .01 of second this will only be based upon the start time and .1s intervals beyond this.
I guess the main features after this is usability there and then, such as setting and checking lap times there and then rather than requiring a laptop to see them.
Once the data is out of the box then slicing and dicing can be performed, whether by the supplied software or something else, in theory knocking something to do what you want wouldn't be a huge amount of effort.
Right to clear up a bit of confusion. The G-Timer has a race monitor mode, which I thought meant recording lap times. It doesn't actually record lap times, but what the race mode does is to record G forces whilst you would be on track. The unit calibrates approx 200 times per second which is why it gives times to 1/100th of a second and by all accounts it is very accurate.
TVRleigh_BBWR said:
Not sure it a good thing to use on a trackday, as it says on the website anyone using timing on a club/track day will be banned for life. bit harsh I know. also anyone know anymore about this.
If you are going to a testing day then timing is fine, but you will need a race licence.
Timing of any sort invalidates your (and their) insurance. Be it mobile phone, wrist watch, data logger...or lap timer.If you are going to a testing day then timing is fine, but you will need a race licence.
thats why they get so heavy. If you were found knocked out in your car with a wrist watch on timer by an attending marshall....
makes people push to beat times/levels. Its only a matter of time before some d1ckhead throws it off looking for Gs.
anyway, most of the G boxes etc are suction mount which would be ripped off and thrown in the bin by the TDO anyway!
as a point, the GT3 RS porker has full logging and timer built in to the dash.they also can't be fully turned off so that porsche de can see what you've been upto in warranty...they don't get thrown off.
andy
TVRleigh_BBWR said:
Not sure it a good thing to use on a trackday, as it says on the website anyone using timing on a club/track day will be banned for life. bit harsh I know. also anyone know anymore about this.
A good point Leigh, had forgotten about that one having got all excited with the prospect of mappings my laps!I'm doing an activity day where timing is allowed, but anywhere is it's a no-no.
TVRleigh_BBWR said:
Ummm I wonder what they do about digital dashes that are road legal. as the one I'm getting run's off the DS1 data logger for speed etc.
Murky ground I suspect, what with the Porsche 911s and others with built-timers, might make some calls if I have the time...I'm sure the PerformanceBox (at that price) was designed for trackday goers too, so it might depend upon the wording, or intent of use.
Tripps said:
I'm sure the PerformanceBox (at that price) was designed for trackday goers too, so it might depend upon the wording, or intent of use.
Yes but an expensive toy, if you can't use it for the track.Good for cops when they pull you over, and they can see a record of your speed, and G's pulled round a corner. Douh.
Technically, everyone who has a bullet cam/camcorder on their car on a trackday is also timing themselves, to an accuracy of at least 1/25th of a second, so it's not black and white.
When I do trackdays in my car, I have a datalogger from which I periodically download data, speed, rpm etc for doing video overlays. I've never been approached by marshalls, however if I were to be asked, the datalogger is doing no lap timing, the only timing information I have is on the camera.
I'm sure the same would apply to G-metres etc. Unless they "know" where start line is, e.g. with infra red received then they aren't timing laps.
When I do trackdays in my car, I have a datalogger from which I periodically download data, speed, rpm etc for doing video overlays. I've never been approached by marshalls, however if I were to be asked, the datalogger is doing no lap timing, the only timing information I have is on the camera.
I'm sure the same would apply to G-metres etc. Unless they "know" where start line is, e.g. with infra red received then they aren't timing laps.
Edited by gingerprince on Friday 26th October 15:19
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