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BjornH

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  • From
    Stockholm, Sweden
  • Porsche Club
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  • Present cars
    996 Carrera 4 -99
    BMW 735iL
    Pontiac Grand Prix 455 -75
    KTM 950 Adventure
  • Future cars
    classic Porsche 911
    Volvo XC70/90, Audi A6 Quattro Avant or Touareg/Cayenne
  • Former cars
    BMW 1600-2 -70
    Citroën GS Break 1220
    Saab 900 turbo
    Volvo 245 GL
    Volvo 745 GL
    Volvo 855 turbo awd

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  1. BjornH
    "...It is my understanding that the VC is always "stiff" enough to couple about 15% of the engine drive torque to the front diff'l but the coupling level will increase to as much as 45% if the rear tires slip/spin for an extended period." The 996 C4 has a 5/95 power distribution by default. This can increase up to a maximum 40/60 if the rears spin enough. Kristian, I agree! For spirited driving on snow etc the PSM needs to be turned of, otherwise it will be like driving with one hand tied behind your back. With somebody else mananging the throttle! You will soon find yourself under steering of the road. (Slip angles in the snow tend to be a little high for the system´s taste!) For transportation and normal driving I always keep the system on. I find the PSM system is very well calibrated and impessive over all. It allows you to slide the car around quite a bit as long as you´re not too abrupt and "panicky" in your movements. I even keep it on on summer track-meets sometimes without losing much speed. (Trying to keep the lights turned off while going as fast as you can at the track is a good way to practice precision and a fluent driving style)
  2. BjornH
    Performance stats from various road tests is not the way to wisdom here. These models are so close that individual differences between cars, test venue and the weather of the day makes more of a difference than the letters on the engine lid. There is however quite a difference in how the C2/C4/C4S drives and feels. Trying them out is the only way to rate them according to your own priorities. My personal view: I love the C4, but would consider a C2 if I was looking for a nice-weather-only car. More communicative steering in the C2 makes it more fun to drive at moderate speeds. The C4 needs more speed and chassi load to come alive. The caracter of the C4 is all rwd (5/95 power distribution by default) but it steers better and har noticable better drive (than C2) in damp, wet and worse conditions. C4S is heavier, slower and less balanced in my opinion. Much more expensive, but holds its value better. And most people love its looks. With parts and know-how you can tune the chassi on either model to behave pretty much the way you want, so don´t take comments about over- or under steer etc too seriously. It can be cured.
  3. BjornH
    On 996 C2, GT3 and ordinary C4 are all narrow body, only C4S and Turbo are wide bodies. On the new 997 the C4 is wide body. Izzy, your car look like an ordinary NB to me. Who says WB? Probably had factory spacers mounted in its past.
  4. BjornH
    I run 1,30 deg negative camber in the front on my C4 -99. (I wanted more, but that´s the most we could achieve). The car has ROW030 suspension but no camber plates or GT3 parts. My car is very well balanced and can be made to under- or oversteer at will. Responsive at the track wihout being twichy on the street. The specs are: Front: Caster: +8,2 deg Camber: - 1,3 deg Toe: + 0,5 deg (toe in) Rear Camber: - 1,25 deg Toe: + 0,12 deg (toe in)
  5. BjornH
    In the rear the Carrera has 65 mm offset, the Boxter 47 mm. This is with stock 18x10´s. You can use Boxster wheels directly on the Carrera but you need spacers the other way around. I believe the fronts are identical. (ET 50-55 mm)
  6. BjornH
    Maybe it would be better to un-click the headlight before leaving the car unattended?... :-( Ps. I once had a Triumph Spitfire. Never locked that thing, better if they didn´t rip the top to get into the car.
  7. BjornH
    Could also be dirt collected on the inside of the rims. Have a look.
  8. BjornH
    Thanks for your help! I had the same "problem" in my -99 Carrera 4. Switching to Philips premium bulbs made a big difference. I choose "Vision Plus" for high beam and "NightGuide" for dipped beam. H7 55W all around. Another tip is Philips GT150 "PowerNight". The "Night Guide" has differentiated color for left and right. I don´t know if there is a version available for LH traffic. The theory is: Left side - yellow, for less glare for oncoming trafic. Right side - blue, for better reading of signs. It works. Philips topped the first five places in a bulb test published in the swedish Auto Motor & Sport last year. Test ranking below. Place and Average light strength 1. Philips GT150 PowerNight 100% 2. Philips Vision Plus 96% 3. Philips NightGuide 95% 4. Philips Premium 93% 5. Philips Blue Vision (blue) 88% 6. Ring Xenon Plus 30% 87% 7. Philips Long Life 86% 8. GE Megalight plus 50% 82% 9. Osram Silverstar 50% 81% 10.Osram Standard 79% 11.Philips Silver Vision (blue) 79% 12.GE Standard 76% 13.Osram All season (yellow) 74% ............... 17.Osram Cool Blue (blue) 64% And no, I´m not affiliated with Philips in any way... :)
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