Who has PAS on their tuscan CC
Discussion
iirc the main reason for using pas was so that you could run a lot more castor and less camber, and they also ran different steering arms i think.
the original tuscan challenge pas was speed sensitive the wrong way iirc the pump ran off the prop, so the faster you went the more assistance, and a bit of an acquired taste.
A couple of people have tried epas using corsa columns but i dont think any one has got on with it, it seems you need the expensive controller to make it work properly due to the torque. Which is annoying as I have a new corsa column and controller that was destined for the sagaris
the original tuscan challenge pas was speed sensitive the wrong way iirc the pump ran off the prop, so the faster you went the more assistance, and a bit of an acquired taste.
A couple of people have tried epas using corsa columns but i dont think any one has got on with it, it seems you need the expensive controller to make it work properly due to the torque. Which is annoying as I have a new corsa column and controller that was destined for the sagaris
My car has the factory pas driven off the diff and its ok, not too light, not driven one recently without pas so can't say if its better to have than not. It must be quicker to catch oversteer with it than without but then downside with pas is that you lose some of the steering feel...
Hi I have the corsa pas set up in my car.I think it is brilliant, when it is working, as with most of the car at the moment it does not want to work all the time.I don't suffer with oversteer as i have my car set to suit my driving style.I find with aero on, it is just all round easier to handle and i won't be dumping it any time soon, just the girlfriend, if she doesn't stop complaining about how much i spend on racing verses and other area of my life.Graham what expensive controller are you thinking of, i use a resistence controller manually ajusted in cockpit that cost £60.
Relevant subject this.
I've mostly spent this weekend prepping my 2 seater Tuscan for Snetterton (gutted i wasnt at Rockinghan though - anyway...) unlike the cars im used to, this one has the factory fitted PAS that runs off the propshaft.
On the one and only test session i had with this car last year, i found the steering too light for my tastes.
Going through druids at Oulton for example, i would give the wheel the sort of input i would with a non PAS car and veer wildly towards the grass - not good.
It will take some getting used to ,and ive fettled the rack and front arches to fit the wider 285 section tyres all round, in an attempt to take a way some of the lightness and take hopefully make it feel more like a non PAS Tuscan on 250 section front tyres.
As an aside my Chim has PAS and on track days the steering has always felt really accurate and quick to respond - i guess what it boils down to is familiarity with the Chim, and unlike Tuscans , not having a non PAS car to compare it with.
Im taking the PAS Tuscan to Oulton this week to see if my wide rubber theory will work , if not i'll have to try not to steer too much at Snetterton
.
I've mostly spent this weekend prepping my 2 seater Tuscan for Snetterton (gutted i wasnt at Rockinghan though - anyway...) unlike the cars im used to, this one has the factory fitted PAS that runs off the propshaft.
On the one and only test session i had with this car last year, i found the steering too light for my tastes.
Going through druids at Oulton for example, i would give the wheel the sort of input i would with a non PAS car and veer wildly towards the grass - not good.
It will take some getting used to ,and ive fettled the rack and front arches to fit the wider 285 section tyres all round, in an attempt to take a way some of the lightness and take hopefully make it feel more like a non PAS Tuscan on 250 section front tyres.
As an aside my Chim has PAS and on track days the steering has always felt really accurate and quick to respond - i guess what it boils down to is familiarity with the Chim, and unlike Tuscans , not having a non PAS car to compare it with.
Im taking the PAS Tuscan to Oulton this week to see if my wide rubber theory will work , if not i'll have to try not to steer too much at Snetterton
.I have a Corsa column on my car, attached to a standard TC manual rack.
I tried the cheap Ebay rally controller using the standard Corsa ECU initially. Even on the lowest resistance it was far too light and had no feel whatsoever - it also provided assistance when unwinding lock, which meant you went over centre. In short it was dangerous. Tim Hood also used it and found the same thing - unlike me he did more than one corner before deciding it wasn't suitable - and he found that it cut out mid corner then came back on again - highly dangerous. This seems to be the thermal cutout in the Corsa ECU - its not designed to handle the loads a slick shod GT car generates and overheats, cuts off, cools rapidly then flicks back on. He dumped the whole thing including the column.
DC Electronics do an EPAS Lite ECU, which Topcats had fitted to their Sagaris race car. All the reports I had on that was that the steering was overly light, even on the lowest setting.
Given the type of racing we are now doing we needed a solution, and I ended up taking the plunge and getting the DC Electronics Motorsport Pro ECU. We have six steering maps which we can programme on the laptop to give different levels of assistance - i.e. how much output torque the EPAS gives for different levels of (driver) input torque. By playing around with the shape of the graphs on thsi we found a set up that gives more assistance on slower speed corners and less on high speed corners. We can select each of the maps on a rotary switched on the dash. I'm really pleased with the end result - its now spot on. Unfortunately this all comes at a cost though
(Look up the DC website if you want to know how much...)
I tried the cheap Ebay rally controller using the standard Corsa ECU initially. Even on the lowest resistance it was far too light and had no feel whatsoever - it also provided assistance when unwinding lock, which meant you went over centre. In short it was dangerous. Tim Hood also used it and found the same thing - unlike me he did more than one corner before deciding it wasn't suitable - and he found that it cut out mid corner then came back on again - highly dangerous. This seems to be the thermal cutout in the Corsa ECU - its not designed to handle the loads a slick shod GT car generates and overheats, cuts off, cools rapidly then flicks back on. He dumped the whole thing including the column.
DC Electronics do an EPAS Lite ECU, which Topcats had fitted to their Sagaris race car. All the reports I had on that was that the steering was overly light, even on the lowest setting.
Given the type of racing we are now doing we needed a solution, and I ended up taking the plunge and getting the DC Electronics Motorsport Pro ECU. We have six steering maps which we can programme on the laptop to give different levels of assistance - i.e. how much output torque the EPAS gives for different levels of (driver) input torque. By playing around with the shape of the graphs on thsi we found a set up that gives more assistance on slower speed corners and less on high speed corners. We can select each of the maps on a rotary switched on the dash. I'm really pleased with the end result - its now spot on. Unfortunately this all comes at a cost though
(Look up the DC website if you want to know how much...)450Nick said:
Got a Corsa C column in mine too... I've looked around at the pitfalls and will probably be going with the DC electronics ECU as well once the rest of the car is driving around.
I'm running the corsa one also, and have had the same problems, so fitted a switch, so it's only on when moving the car about, and then switched off while racing. you only need to switch the 12v to the controller, not the 12v main feed.Just remembered this guy is doing a lot of work into the Corsa rack for use in his Griff. I spoke to him a few months back about doing an ECU for the racer, and he is interested in helping out. I put it on the back burner as I have bigger problems to sort at the moment, but if anyone wants to get in touch sooner than I, he seems to have a very good understanding of the unit and reckons he can sort the over-assistance problem for a fraction of the cost of a DC Electronics sledgehammer solution.
Worth a look!
http://web4.pistonheads.com/gassing/topic.asp?h=0&...
Worth a look!
http://web4.pistonheads.com/gassing/topic.asp?h=0&...
Gassing Station | General Motorsport | Top of Page | What's New | My Stuff