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Was it with the spare tires and all the factory equipment?
I find this number surprisingly low. I think the sport seats may save around 10 to 15 kg but certainly not 35.
I say 35kg because a fuel tank must weight around 65kg. So your car with a full fuel tank should weight 1535 kg (vs my car 1570).
My completely stock '87 S4 weighed 1480kg on the weighbridge with 10L of fuel, and no spare wheel or tool panel.
(no sunroof, comfort seats and 12-way memory on driver's, cruise, AC, 4-speaker stereo system, 5-speed no LSD and cheap plastic vinyl interior).
Very close to the Mass CS pre-production which was weighted at 1480 kg without spare wheel. Sadly, I don't know how much fuel was into the tank.
This car has regular 8-way seats, so is a little heavier than the Bell's & Stuck's cars. The full manual seats save 20 kg according to Porsche.
This picture is of the first prototype, that weighted officially 1443 kg (full tanks...).
Was it with the spare tires and all the factory equipment?
I find this number surprisingly low. I think the sport seats may save around 10 to 15 kg but certainly not 35.
I say 35kg because a fuel tank must weight around 65kg. So your car with a full fuel tank should weight 1535 kg (vs my car 1570).
Now that I have had the article in hands (Thanks to Captain 911), I understand better the claim of 285 lbs weight reduction.
It seems that the very first production CS (the one tested by Paul Frère) was also a car without AC. And this is certainly the only one without. All others certainly have the regular AC system, except for the lightest compressor later used by the GT.
The deletion of AC reduces the weight by 35 kg.
Now that I have had the article in hands (Thanks to Captain 911), I understand better the claim of 285 lbs weight reduction. It seems that the very first production CS (the one tested by Paul Frère) was also a car without AC. And this is certainly the only one without. All others certainly have the regular AC system, except for the lightest compressor later used by the GT. The deletion of AC reduces the weight by 35 kg.
when he was testing
Porsche Paul was an authority and he Never missed the point
engine block
A/C unit (smaller)
interior had cloth stripes (mostly)
transmission was a G28/55
rims were CS 8" and 9"
sticker on the fenders
no sunroof
most of the other stuff was shared with the S4/GTs?
I would say if the block and trans are useable (original) you could bring it back to near original condition with other parts and still call it a CS (esp if the VIN is a CS vin)...
This is technically not a part, but isn't there less insulation in a Club Sport car than in your conventional 928 S4?
Well, this wasn't a problem at all for my car that was delivered in France but I would be more suspicious for a car delivered in Germany and used in winter. The salt they use on the road could be a real problem.
A CS is not that more noisy than a regular GT. In fact, you have to travel very fast to notice a big difference. But the way the car reacts above 4000 rpm is pure fun!
Heat could be more problematic than noise in fact because the engine produces a lot of it and the removal of the insulation on the firewall does not help to keep the cabin cool.
Very close to the Mass CS pre-production which was weighted at 1480 kg without spare wheel. Sadly, I don't know how much fuel was into the tank.
This car has regular 8-way seats, so is a little heavier than the Bell's & Stuck's cars. The full manual seats save 20 kg according to Porsche.
This picture is of the first prototype, that weighted officially 1443 kg (full tanks...).
sun visors saved 2 kg???
I' d say all stock sun visors together weigh no more then 1 kg. But I have been wrong before, anyone got a number?
Kurt
____
90 S4 satin black metallic
928 OC Charter Member
I think 1kg is also more realistic. At least this is the weight of the two rear I have removed from my 1987 S4.
Maybe this car has also lost its passenger front sun visor (like a 911 3.2 CS), but the production 928 CS have both front.
I just stumbled upon this thread..!
Great reading.
I have read somewhere that there were 4 red 928 S4 prototypes.
One of which was the speed record car that Holbert drove.
There was also one tested in Auto Motor Und Sport in October of 86.
This car was confirmed by Porsche to be a pre-series car, doesn't it seem likely it is one of those 4?
And being one of only 4.... I would say it is even rarer than the production Clubsports!
I have procured the VIN of the car through the seller in Germany.
Could anyone here help me get more information on it..?
Cheers. Michael
Last edited by Boomerang Baba; 02-24-2016 at 11:23 AM.
Reason: typo
I just stumbled upon this thread..!
Great reading.
I have read somewhere that there were 4 red 928 S4 prototypes.
One of which was the speed record car that Holbert drove.
There was also one tested in Auto Motor Und Sport in October of 86.
This car was confirmed by Porsche to be a pre-series car, doesn't it seem likely it is one of those 4?
And being one of only 4.... I would say it is even rarer that the production Clubsports!
I have procured the VIN of the car through the seller in Germany.
Could anyone here help me get more information on it..?
Cheers. Michael
Regarding prototypes and pre-production CS's, here is what I know so far:
- Three red prototypes:
#1: The car tested by AMS in October 1986
#2: This car
#3: Another red car that was in the UK around 2000.
- Four whites pre-production cars made for the factory drivers. I still need to find the ex-Wollek car. The others are in good hands.
There may be more, two pre-productions and maybe others prototypes.
The Holbert's car was not a CS. This car was born as an automatic white 1986 S2, and used as an S4 prototype.
11-25-2014, 06:44 AM
