Clutch In Gpl SetupsGPL clutch
Posted Nov 27 2017 - 06:18 AM
I've recently been on a mission to learn how to properly set up a car, I'm using GPL and Assetto Corsa as my main platforms. I have been making some good progress but one aspect of the car setup that I have never came across before and cannot find any proper resources for is the clutch. I'm guessing that the GPL setting relates to the clutch plates but I don't know what effect it has on the car, would more clutch plates give better acceleration but less reliability due to friction? I would be thankful if someone with a bit more knowledge than me could enlighten me on the subject.
Posted Nov 27 2017 - 06:59 AM
I recently made a video about it, although it just covers the basics and is not very in depth.
Here's an excellent guide by Charlie Williscroft:
Edited by Millennium, Nov 27 2017 - 07:04 AM.
Posted Nov 27 2017 - 07:12 AM
The more clutches (in combination with slower angles), the hard differential.
Posted Nov 27 2017 - 07:40 AM
so you get an absolute value of the differential locking
Posted Nov 27 2017 - 09:31 AM
One idiot's theory:
There are only two differential conditions.
1. Power on accelerating, (99.9 percent of the time).
2. Coasting with power off, (momentary condition only to set sprung weight on rear of car for acceleration thru a turn).
Also note, as I understand, springs and anti-roll bars define the extent of sprung weight travel. Shocks and the diff effect the speed of travel.
The standard operating condition is power on accelerating.
The only time and reason to lift throttle and go into coast is to rotate the rear of the car to set it up for acceleration thru a turn.
So the diff setup priority is dependent on driver style and technique as well as the car's capability.
Refer to gpllinks tech section for some links to diff technology.
Here's one that is simple and easy enough to apply to GPL setups: Vari-loc
Plus this link to some setup secrets:http://srmz.net/inde.... skid fun&st=0
And a great place to test setups and effect of changes: Skid Fun
Edited by John Woods, Nov 27 2017 - 09:43 AM.
Posted Nov 27 2017 - 10:05 AM
Edited by FJBH10, Nov 27 2017 - 10:11 AM.
Posted Nov 28 2017 - 09:11 AM
The ramp angles control how much of force the accleration of the tyres/driveshaft puts on the clutchs. With the power angle(first value) in use when the engine is driving the wheels and the coast angle for the other case.
Posted Nov 28 2017 - 01:33 PM
Not rocket science (but then I'm only an average driver) but it works for me.
Posted Nov 28 2017 - 02:34 PM
1. If I want more rotation under power, I lower the first ramp angle number. (power)
2. If I want more rotation while braking/steering into a corner, I raise the second ramp angle number. (coast)
3. Based on how loose or tight the diff feels with the ramp angles I've chosen, I raise or lower the amount of clutches.
In that way I sort of use the amount of clutches as a way to fine tune my diff settings, not as a base to build up from. I don't know if that's the right way to look at it, but it works for me.
Posted Nov 28 2017 - 02:44 PM
Its the exact opposite
Posted Nov 29 2017 - 12:41 AM
Well it works for me!
Posted Nov 29 2017 - 10:12 AM
Small part of what Vari-loc says about tuning ramp angles:
"Differential locking action creates drag between the tires that in turn produces push. In general, the greater the locking action, the more push that is created."
"Corner entry and exit are controlled by the ramp angles, and neutral throttle by preloading the clutch pack."
"Locking rate of both sides of the ramp can be lowered by reducing preload, or by rearranging the clutches to reduce the number of active surfaces."
Pretty certainly, more locking causes more push. So Leon is correct in noting that increasing clutches will not correct push but actually does the opposite.
Maybe JonnyA is also correct, when steering car using throttle, as the effect of stiffer diff could be an advantage in precisely turning (rotating) the car?
Just a guess...plus if a typical morning post probably exactly wrong somewhere.
Edited by John Woods, Nov 29 2017 - 10:40 AM.
Posted Nov 29 2017 - 03:41 PM
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