Thanks for the advice !!!
Was much more wet and slippery then the image shows. Temp was 8c so also not really helping. Wet set up advice was perfect. Later that day it got dry and i went back to dry set up. End of the day it got wet again and i kept the dry settings with only rain tires. Could clearly feel the difference with the loose settings.

It's not on this stint but later that day i tried to stay more off the racing line to avoid the slippery parts (when wet) of the track. Much more grip. Need much more time behind the wheel and are learning by doing.

 

Résurrection of a very old thread as I have the same situation : Rain forecasted for next race in 996 cup.

I have understood that I should disconnect the sway bars and will do, but what about the dampers settings ? Should I go full soft bump & rebound, front and rear and call it a day, or is there any secret trick I shoul know ?

many thanks for any help !

Cedric

 

He Cedric, Nice you're also competing in a 996 Cup now. We both went the 996 GT3-R route. Cool

When i posted this thread initially i was not racing. Not sure why i said 'season finale'. I guess i was over excited.

In the mean time i did race a lot with the 996 Cup, and also in the rain.

I always kept my dampers in the same setting as for dry and did not touch them.
Only softened the sway bars. How soft i decided upon how wet it was. The wetter, the softer obviously. Maximum soft is one side disconnected (+ tie-rips to keep all the parts in place)
When really wet, i also tried to decrease the overstear by softening the rear more then the front.

Good luck and Enjoy your race

Ivo

 

0ne of my best wet races in the 996 Cup.
Field was ± 40 Porsches: 15 x 997 Cups followed by 11 x 996 Cups

 

 

Fascinating thread. I have always wondered about what I would do with my set up in the wet. I have never driven my 996 cup in the rain. The sway bar disconnection idea is really interesting, I’ve never heard of it! Q&A how wet did it have to be for you to go with this?

Also I’m unsure what to do with shock settings on this car. My compression is around 30 clicks. Not sure on rebound but the car feels good on smooth tracks with fast corners. Should compression be adjusted proportionately to rebound?

 

Hey Ivo !

Thank you for your feedback ! I am going to try disconnectig both bars, at first. I will then try to adjust the dampers to deal with over/understeer. I am discovering this car, and it will be my first time with these dampers (it had shot D3 Suspension dampers before).

What baseline do you (and you, Spiler ;-)) use on these dampers on a dry track ?

 

I have never adjusted my dampers but I’ll get the settings for you and post here.

 

Thank you Spiller.

I am quite confused about the service manual and the clockwise / anticlockwise on the rebound. The service manual states :

"For the front damper setting the adjustment range is from –360° to +270° (total 1 + ¾ turn) (see damping characteristic graph). 0° is the middle position of rebound.
The damping forces are lowest at –360°, the maximum forces are at +270°. By turning the hexagon counterclockwise the damping forces increase (3), clockwise the forces decrease (4).
It is possible to hold the piston rod with h hexagon A/F 10 (5) while adjusting."

If 0° is the middle, -360° the lowest damping forces & +270° the highest damping forces, my educated guess is that if I turn clockwise, I stiffen the damping force, whereas the manual states that it decreases...

Does anyone know what is correct ? Clockwise = Stiffer (which would be in line with the way the bump goes), or = softer ?

Thanks for any input (yes, I'm a bit **** about these - Engineer way of thinking ;-))

Cedric

 

although I haven’t tried it, I would follow the manual. I don’t know much about how damper adjusters work and usually clockwise is stiffer (it is with the compression, as you said) but I doubt porsche would get it wrong. I wonder how many degrees at a time is considered to be enough to make a noticeable change in the dampening...45 degrees? 90 degrees?

 

FWIW, Farnbacher, who won the Supercup in 996 cup, set my shocks full soft in the rain.

 

Thanks Mike ! Full soft (Bump + Rebound) in the 4 corners + removing sway bars ?

Spiller : In fact, their writing is contradictory as they state on thing and the other (or I am misunderstanding the way damping forces work)

 

my take is it all depends on where 0 is perceived to be. You could find 0 by winding it all the way clockwise (which will effectively be -360 degrees and the softest setting) and then unwinding counterclockwise one whole turn. That will be 0 degrees. It should then wind counter clockwise a further 3/4 turns as the manual states, which will be the hardest rebound setting (+270 degrees). I think that makes sense? The confusing part is + is usually associated with clockwise and -ve is usually counter clockwise but according to the manual, this common association doesn’t apply here.

 

I think that even PM can make mistakes :-) I will try some setups to figure it out.

I was at Magny cours yesterday, full wet, disconnected sway bars, dampers at baseline (20 bump, 0 deg rebound). A bit of understeer, but the car was predictable ! Thanks to all for your insights !

 

Did you work out whether clockwise is hard or soft in the end? I just checked my set up book and my bump settings are 17 in the front and 30 in the rear. Have never touched rebound so can’t comment but these compression settings feel good on a smooth high speed track. Quite bumpy on a street circuit however.