Anti Lock Brakes
#21
Posted 23 November 2003 - 09:49 PM
#22
Posted 23 November 2003 - 09:53 PM
#23
Posted 23 November 2003 - 10:33 PM
Coming into the hairpins at Bedford, i found the abs coming on and lasting ages clickity click clickI YOU can take the fuse out for the track and it transforms the car. Costs nothing too which makes a nice change. Disables the speedo aswell on n/a's though
If i take the fuse out and cut the power to the ABS and dash, will the rev counter work?? I presume not.....
#24
Posted 23 November 2003 - 11:24 PM
#25
Posted 24 November 2003 - 09:13 AM
In Rockstar's defence he never claimed to have had anything to do with the development of the VX. He did, however, describe a very plausible senario whereby a big car company would strong arm a smaller company into developing an ABS system for a low volume car being made by the aforementioned big car company. The smaller company would then do the job in the shortest possible time by reusing a system from a broadly similar car which wasn't quite what was needed.i)Rockstar had little to do with setting this car up
At no time did he say that was what happened in the case of the VX.
#26
Posted 24 November 2003 - 09:33 AM
I can assure you that this was definately not the case in the ABS for the Opel Speedster / VX220!The smaller company would then do the job in the shortest possible time by reusing a system from a broadly similar car which wasn't quite what was needed.
#27
Posted 24 November 2003 - 09:42 AM
#28
Posted 24 November 2003 - 10:04 AM
#29
Posted 24 November 2003 - 10:20 AM
#30
Posted 24 November 2003 - 10:35 AM
#31
Posted 24 November 2003 - 10:48 AM
be nice if Mr "Ringer" could let us know his involvement?? Or Miss!!I can assure you that this was definately not the case in the ABS for the Opel Speedster / VX220!
Edited by cheeky_chops, 24 November 2003 - 10:48 AM.
#32
Posted 24 November 2003 - 11:08 AM
For me too.ABS & airbag were major reasons for m choosing a VX over an elise.
I've wondered if it being light at the front is a reason for some of the difficulties, but then F1 cars are lighter still and they stop pretty well! I know they have far more advanced braking systems, but light weight can't really be a big factor if you consider this.
#33
Posted 24 November 2003 - 11:38 AM
#34
Posted 28 November 2003 - 12:07 PM
That's MR, thanks very much!be nice if Mr "Ringer" could let us know his involvement?? Or Miss!!I can assure you that this was definately not the case in the ABS for the Opel Speedster / VX220!
I currently work in one of the departments that was responsible for the Speedster / VX ABS. It was pretty much done when I arrived here from another office in the US.
I dug up and read Rockstar's comments about the ABS and I'm not sure I agree with his perspective. Sure the unit is the "same one" as the Esprit, it's also the "same one" as the Diablo and the Opel Vectra. All the "EBC430EV" unit...
However with each vehicle application, certain hydraulic parts are always correctly sized to the vehicle application, and the software that controls the ABS operation is completely recalibrated for the application. Furthermore, with each successive project, the control software is also updated with the latest logic and features.
To incinuate that the Speedster/VX was dragged over from the Esprit with minimal change is rediculous.
He does have a good point in general though, that most likely the only reason the company ever agreed to do such a low volume project was that it was associated with other high volume business. (Opel Vectra). Sometimes low volume business will get quoted in hopes of "sweetening" a high volume business quote, or for other reasons.
For certain with a low volume project such as this there are a lot of limitations on the development of a system on the car like the ABS... So many factors are a hinderance such as small development budget by the ABS supplier, or even of the manufacturer itself, reduced development time in some cases, limited numbers of vehicles available during the development phase, etc etc. Anytime you are working on a system like ABS, you can always keep improving it with more time - but eventually the manufacturer wants the supplier to stop tweaking and start supplying !
I've never driven a Speedster/VX, so I can't really comment on any specific problems with the ABS. Nor do I know anything about the ABS change which happened before I got here. But I can say that one of the key engineers for the Speedster/VX ABS was an Elise driver.... I talk to him sometime and try to find out more.
An aside - any of you driven both Elises and Speedster/VX's ? I've driven a MkI Elise and there was so little room (I'm 1.93m / 6'4" tall and have disproportionally long legs on top of that) that I literally couldn't steer when in 1st or 2nd gear (was a RHD car). Thank goodness it was in Sweden so I could just drive in 3rd and up gears and just let the wheels spin in the snow. I later sat in a MkII and had the same space problem so didn't even bother trying to drive it. Does the Speedster/VX have the same tightness, or does it have a little more room?
#35
Posted 28 November 2003 - 01:53 PM
#36
Posted 28 November 2003 - 03:03 PM
#37
Posted 28 November 2003 - 03:22 PM
his fronts are standard size - he's bunked off the desk so i'll guess they're 215's for now but will edit if i find out different.What size tyres has your mate's 964 got on the front? Maybe there is more dive in the front suspension that makes it feel like there is more stopping going on?
so agreed, they are considerably wider than VX's, but factor in the RS must weigh at least an extra couple of hundred kilos and probably more - which i guess helps with initally not locking up if you're not too gentle with the brake pedal as you say but then shld actually make it more diffcult to sustain a higher G stop.
the RS has no dive, actually felt like it had no suspension at all come to think of it .
#38
Posted 28 November 2003 - 06:22 PM
#39
Posted 28 November 2003 - 07:10 PM
I think increased mass has a bigger effect on your momentum than the grip of your tyres. Sticking a 100kg weight (or me) in your car will perhaps increase the friction of the tyres a bit but will increase your momentum relatively more and so increase your stopping distance. Is that what you mean?I've always wondered about weight not helping stopping...
Obviously, with more weight (or rather mass) there is more energy to dissipate, but the higher the mass, the bigger the normal that is combining with the co-efficient of friction, therefore more ulimate friction.
I suppose that if 'mass' in both of these bits is of the same scale (i.e. not a power thing - and I'm pretty sure it isn't), then it will ccancel out and not make any difference.
*shrug* I don't know!
cheers - have a good weekend
#40
Posted 28 November 2003 - 07:17 PM
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