PASM on a 997 C2S MK1

[flanagan]

Please can I have clarification on what Porsche says the difference is between - pressing the PASM button and secondly, pressing the Sport button? I understand that on pressing the PASM button the car changes to SPORT PASM and the ride stiffens, but does the car actually lower? What is the offical difference between Sport PASM and the Sport Button? Finally. Was a SPORTS suspension pack available for the 997MK1(ie lowering the car to GT3 Spec) or is their an OEM kit available now?

Thank you once again

PS ...........Yes .....................I do have the giant stopwatch

 

[mex99]

OK I am in helpful mode tonight....

Pressing the sport button does the following:

1. Automatically switches PASM to sports mode*
2. Reduces accelerator pedal travel by 30%, ie less pressure for more acceleration
3. Increases the PSM slip angle to 15 degrees, ie no PSM intervention until rear end slips by this amount.

* You can if you wish revert this to normal mode by pressing the PASM button, ie you retain the other characteristics but loose the 'stiffened' suspension

Pressing the PASM button does not lower the car - a car with PASM is 10mm lower (permanently) than the non PASM car (remembering PASM is standard on the S). On the 997.1 you could spec a LSD which removed PASM, rode -20mm from standard height but was on permanent stiffer suspension, about 80% of the sport PASM setting. On the gen 2 car you can have PASM and -20mm LSD - best value option and rocks - most people don't get it though - they are not cool!

Real men tend to stay in sport mode all the time and flip between PASM on and off depending on the road conditions.[] Personally i find the accelerator a bit non responsive in non sport mode.

You can certainly lower the car as an aftermarket upgrade and some have done it with greta success - I have no experience here though.

Feel like I've forgotten something but can't think what???

D

 

[okellyt]

ORIGINAL: flanagan

Please can I have clarification on what Porsche says the difference is between - pressing the PASM button and secondly, pressing the Sport button? I understand that on pressing the PASM button the car changes to SPORT PASM and the ride stiffens, but does the car actually lower? What is the offical difference between Sport PASM and the Sport Button? Finally. Was a SPORTS suspension pack available for the 997MK1(ie lowering the car to GT3 Spec) or is their an OEM kit available now?

Thank you once again

PS ...........Yes .....................I do have the giant stopwatch

Mex 99 is bang on

No difference in ride hight - PASM is 10mm lower than normal sports mode on or off.

Pasm for the Gen 1 997 had 7 different setting depending upon road conditions. PASM in normal would seek a compromise between handling and comfort (the stiffest mode that provided a comfortable ride). Pressing the sports mode or pressing PASM for sport (there were 2 separate buttons) set PASM for handling as a priority and comfort of ride as a secondary - so you got the firmest ride that allowed the car to handle and no mercy for your disks (ie compressed spine 'r 'us). In nay case ride height remained 10mm below standard.

Along side the PASM changes the throttle pedal aggressiveness was changed - the throttle becomes much more sensitive, the engine revs more freely (easier to stall, more responsive to throttle inputs) the rev limit is harsher to protect the engine form over revving and the PSM limits are raised to allow some tail out fun - without this PSM tries to stop you getting the tail out at all.

Sports button effects both throttle and PASM. You can reset PASM to comfort mode - for any non track driving having the sports chrono option allows the best of both worlds - Throttle on most sensitive (sports on), PASM on comfort (PASM sports set off). The ride works better with UK roads but the throttle is at its most sensitive with a much more revvy engine and you can kick the tail out.

Can be retro fitted but ***ing expensive.

 

[flanagan]

Mex99 & okellyt, Thank you. Great responses

My next suspension question is as a result of Alex Larkin's Porsche Post article on page 52. Would you both agree that the 30mm drop of the GT3 is too much and a perfect compromise is 15mm? and is that 5mm as my S is already 10mm? or is the GT3 30mm lower than my Ss 10mm?

I think I have confused myself![:'(] You guys probably think this is childs play[]

 

[Alex L]

This table I compiled a while back may help you with ride heights (those in red are factory settings):

 

[okellyt]

ORIGINAL: flanagan

Mex99 & okellyt, Thank you. Great responses

My next suspension question is as a result of Alex Larkin's Porsche Post article on page 52. Would you both agree that the 30mm drop of the GT3 is too much and a perfect compromise is 15mm? and is that 5mm as my S is already 10mm? or is the GT3 30mm lower than my Ss 10mm?

I think I have confused myself![:'(] You guys probably think this is childs play[]

If you .look at Alex's table the answer is its not straight forward and there is no one right answer. It depends upon the car, your driving style, skill and preference for where your diving. ie mostly track or mostly road. preferences for how sharp you want turn in versus how lively you want the back end to be etc. Its also effected by your size/weight as well. a lot of it is what compromise gives you most confidence in controlling your car, which is a very personal thing.

This is basically Centre gravity's USP - other places do very good alignment and set up but settle on a menu of several set options, with no guarantee you'll get on best with any of them. Chris tries to personalize it for you at that time.

 

[flanagan]

Thanks Guys


Really appreciate it. May even bore a few of you at Le Mans over a few cold ones. Over on the Friday night Tunnel.....first time ............joing a few mates who have hit it hard for the past 5 years

 

[flanagan]

Thanks Alex

Looks like Chris is the man for me once I have had my track hour on the PCGB day at Silverstone 18th July. Any 997 owners going to this?

 

[berty987]

The sport button adjusts the max rpm before the rev limiter, the amount of PSM intervention and the throttle response.

PASM cars have 10mm lower suspension and 5 active suspension settings in both sport and normal modes (a total of 10) . Pressing the PASM button changes the damper settings from the normal to sport map. Sport map is too hard for road use unless on a motorway or billiard table surface. You actually travel slower in sport mode on a bumpy road than in normal. In normal mode the PASM is actually slightly softer than a standard non PASM equipped car. This is why PASM is often specced when 19" wheels are fitted. PASM constanly changes the damping setting program based on road speed and accelerometers to give the best ride comfort and handling.

PASM cars have different springs, dampers and anti roll bars to standard cars.