General > Shows, Events and Meets
AMD rolling road day 12th December
Saint Steve:
--- Quote from: Gtikenny on December 13, 2010, 07:04:24 pm ---So was i Robin as AMD have got a very good reputation and so has Saun, but i dont understand why they would do something like that twice! They must know there stuff as they have a car in the BTCC!
--- End quote ---
Perhaps that's why their btcc car is always at the back on the pack , their 300bhp car, is actually only 150bhp on a more accurate set of rollers :signLOL:
Gtikenny:
:signLOL:
Janner_Sy:
--- Quote from: Saint Steve on December 13, 2010, 07:07:56 pm ---
--- Quote from: Gtikenny on December 13, 2010, 07:04:24 pm ---So was i Robin as AMD have got a very good reputation and so has Saun, but i dont understand why they would do something like that twice! They must know there stuff as they have a car in the BTCC!
--- End quote ---
Perhaps that's why their btcc car is always at the back on the pack , their 300bhp car, is actually only 150bhp on a more accurate set of rollers :signLOL:
--- End quote ---
probably not to far off of the truth. they have said at every race that they are underpowered compared to the others
rich83:
--- Quote from: Saint Steve on December 13, 2010, 07:07:56 pm ---
--- Quote from: Gtikenny on December 13, 2010, 07:04:24 pm ---So was i Robin as AMD have got a very good reputation and so has Saun, but i dont understand why they would do something like that twice! They must know there stuff as they have a car in the BTCC!
--- End quote ---
Perhaps that's why their btcc car is always at the back on the pack , their 300bhp car, is actually only 150bhp on a more accurate set of rollers :signLOL:
--- End quote ---
That made me chuckle!
FWIW.... the only experience i have with AMDs rollers are on my old MK5 1.9TDI (105PS). I ran a stage 1 custom code map and it ran at 169bhp according to there RR!! Which is either very good or very optimistic!
rtechniki:
Dimpsort rolling roads come in two forms asorber braked and inertia. The brake type rolling roads are the correct units for producing live remap and running high power forced induction cars.
The inertia version just has a steel mass weight where the asorber brake should be. This setup is only good for power runs and basic datalogging as it cannot but the car under load at the top end.
To get a a power graph the inertia rolling road software works out how fast the car accelerates the mass of the rollers and weight. This method is more accurate than all other methods as it use basic mathmatics. The problem is tyre slip and op error, dimsport use small smooth 9" rollers and the strapping of the car is only sideways, so when the car come on full boost the contact of the tyre becomes light on the rear roller which causes the maths of the inertia law read higher. The reason stock cars make the correct power is that the power deliver is more linear and the wheels dont tend to climb out of the rollers. I am sure if dimsport op could get straps over the bottom arm they would read real world power on high bhp cars, but by having the car strapped with just side straps the higher power turbo car are going to wheel spin and run light on the back rollers.
I use a rolling road with huge 12" smooth rollers, it has an eddy current brake and can also do inertial power runs. just by using side strap it will runs a stage 1 ed30 fine up to around 270bhp but if we run stage 2 we tend to see slip and the car pulling light on the rear roller which causes higher reading. To get around this we have to put straps over the bottom arm and pull the car down. The only reason we can strap over the bottom are is becuase our dyno id 2 foot above ground a simlar setup to JKMs dyno.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version