

Power/coast Ramp Angles And Clutches
#1
Posted Jul 21 2014 - 03:53 PM
Please comment and let me know your thoughts on this subject and thread.
Thanks in advance for any input.
TP.
https://groups.googl...ors/QZ0xRr1AHZc
CHOW!!
#2
Posted Jul 21 2014 - 04:25 PM
In a nutshell, disregard most of what you may read about real world differentials and setups as GPL is not the same; particularly when it comes to the ramp angles and number of clutches and their effect on car handling.
This has been discussed numerous times here so I won't repeat it.
Edited by Lee200, Jul 21 2014 - 04:26 PM.
#3
Posted Jul 22 2014 - 02:43 AM
numbers: 30/85/1 = power/coast/clutches
ie power = when applying throttle / coast = when lifting off throttle
30/85 is aggressive (alien

ie easy to spin the wheels when applying throttle / easy for rear to break free when lifting off throttle to begin braking
85/30 (default on 67 cars) makes the cars easier to drive by allowing you to be more aggressive (heavy footed) with the throttle pedal.
Clutches:
use them to fine tune the diff.
more clutches = makes car more stable when lifting off throttle but looser when applying throttle.

#4
Posted Jul 22 2014 - 04:12 AM
These are values I gathered troughout my GPL-years and still keep in my personal "GPL setup guide for dummies".
As you can see I'm a profound believer of the KISS principle



#5
Posted Jul 22 2014 - 05:44 AM
#6
Posted Jul 22 2014 - 01:06 PM
Lee200, on Jul 21 2014 - 04:25 PM, said:
In a nutshell, disregard most of what you may read about real world differentials and setups as GPL is not the same; particularly when it comes to the ramp angles and number of clutches and their effect on car handling.
This has been discussed numerous times here so I won't repeat it.
many many times ...
like this one http://srmz.net/inde...295
#7
Posted Jul 23 2014 - 05:53 PM
Maybe this is where Bart got the charts?
Here's English: (not sure how this will upload, think its from a webpage, so...)
Attached Files
Edited by John Woods, Jul 24 2014 - 06:35 AM.
#8
Posted Jul 24 2014 - 02:28 AM

#9
Posted Jul 24 2014 - 10:10 AM
#10
Posted Jul 24 2014 - 10:36 AM
#11
Posted Jul 24 2014 - 12:02 PM
Many thanks TP.
#12
Posted Jul 24 2014 - 04:28 PM
John Woods, on Jul 23 2014 - 05:53 PM, said:
Maybe this is where Bart got the charts?
Here's English: (not sure how this will upload, think its from a webpage, so...)
Great stuff, many thanks for posting that. Seems my setups aren't too far off, having those locking tables will hopefully make it easier to get the car just right. Also it's interesting that Niels dismisses using the gas to stabilise the car under braking, pretty much what I always believed too.
And just to confuse things further, the Lotus 49 in Assetto Corsa has power and coast angles plus a preload setting, but no settings for clutches......


Edited by Fat Rich, Jul 24 2014 - 04:29 PM.
#13
Posted Jul 25 2014 - 09:22 AM
Fat Rich, on Jul 24 2014 - 04:28 PM, said:


There's also another fantasy...stay on throttle just enough to keep revs up in max power band.
LFBers can easily do that without heel/toe/rigamaroe.
Edited by John Woods, Jul 25 2014 - 09:34 AM.
#14
Posted Jul 25 2014 - 10:41 AM
John Woods, on Jul 25 2014 - 09:22 AM, said:
LFBers can easily do that without heel/toe/rigamaroe.
I could maybe understand that in a turbo car to keep the boost up (like the new Lotus 98T in Assetto Corsa



Edited by Fat Rich, Jul 25 2014 - 10:42 AM.
#15
Posted Jul 25 2014 - 12:04 PM
Seems it can cost a few tenths.
The right gear, either up or down, keeps engine happy.
#16
Posted Jul 25 2014 - 12:14 PM
Anyway, the part I don't really get with Niels' post is at the end.
I'm fine with all the theory but then his actual suggestions seem to go completely against it, in that he was MORE LOCKING on coast than power?
Surely you would want more locking on power so you can get the power down more effectively and less locking on coast so you can turn in better. Yet his suggested locking values are the complete opposite of this.
Btw, you can still view Niels' article online without having to download it, using the internet archive:
http://web.archive.o...guide/guide.htm
It also means you can view older versions of it too if you really wanted to (i think he shortened some parts or something but i haven't checked).
Edited by one2fwee, Jul 25 2014 - 12:36 PM.
#17
Posted Jul 25 2014 - 04:37 PM
Nuvolari didn't lift, btw.
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