Suffolk944
Moderator
Ooh intriguing !
Adding Lightness
- Thread starter Suffolk944
- Start date
Ooh intriguing !
Peter Empson
PCGB Member
Air con is for wimps, I was running with my heater on at Silverstone [
] (may have a slight overheating issue to deal with)
] (may have a slight overheating issue to deal with)
pauljmcnulty
Active member
And you should have seen him get out of the sauna.....I had to sit near him in the pub! [
][]
Peter Empson
PCGB Member
Real men don't use deodorant, all you need is some Gulf 15W-50 and a splash of 97 RON. []
]
CarreraRSR
New member
Isn't the rough rule of thumb - for every 50kgs weight lost is equivalent additional 10bhp
Heres a link to a few 'calculators' one being a weight loss spreadsheet http://members.rennlist.org/dan10101/car_math.htm
If you are planning on removing the rear seat or fitting bucket seats then don't forget the additional weight of the under carpet insulation matting in the boot and in the foot wells
Heres a link to a few 'calculators' one being a weight loss spreadsheet http://members.rennlist.org/dan10101/car_math.htm
If you are planning on removing the rear seat or fitting bucket seats then don't forget the additional weight of the under carpet insulation matting in the boot and in the foot wells
Having track prepped my S2 I am surprised at how refined the car remains. All the sound deadening is removed and the heavy rear seat back. But I put the (very light) carpets back in to dull the gravel rattle and ditto the rear set bases to keep the tranny whine down. It sounds smooth and refined and does not suffer in comparison to my 996 or the family golf.
Depends entirely what power and weight you start with, but it's not far out for an S2, I reckon, and about spot on for a 250 bhp Turbo. For an S2 I make it about 8.2 bhp if you assume the full 211 flywheel bhp and a starting weight of 1300 kg. That's in pure power-to-weight ratio.
If you reduced the weight of a 400 bhp car that weighs the same, i.e. 1300 kg reducing to 1250, that would be worth about 16 bhp.
944 man
Active member
My advice would be not to sell anything! Clean and cover the seats, maybe get them repaired if theyre worn; and then cover them well enough to protect them in their location. In a spare room Id say covers will be adequate, in a garage Id make a packing box. Id do the same for your bonnet too, as this ensures that till be in perfect condition if you want to re-fit it. Lastly a case for any motors, regualtors and such that you remove too, as re-ftting cleaned up kit is easy; but re-fitting dirty stuff that was thrown in a cardboard box last year isnt.....
I think it's certainly worth removing the simple items as has been itemised above if you're going to do a trackday. If it's your daily driver I'm not sure I'd bother but that would be dependent on just where you are actually driving. As my car became more track focussed than street I found I didn't bother replacing certain items and didn't miss them, but I don't drive long distances on a daily basis. I hope to be down to approx 1150kgs and am really excited about how responsive the car is going to be with a lot more grip too.
Peter, how much does your car weigh now?
Peter, how much does your car weigh now?
bennyboy
New member
Hi all, thought I'd pitch in with my comments, despite not owning the car anymore.... (anybody seen it around MK or heard off the chap who bought it - Drew? I did point him in this general direction!)
Anyways, I removed front (replaced with Corbeau Sprints) and rear seats, all sound deadening (replaced the carpets) and the air-con condensor, but then fitted a 30kg half-cage. What to say? Well, I reckon the car was about 80kg lighter than factory, yet it was still perfectly balanced (measured on professional digital scales at all 4 corners), and behind the KW suspension, it was undoubtedly the biggest improvement I made to the car. Whilst the cage obviously added some weight, it also added some noticeable stiffness and of course, allowed me to use harnesses, which I would recommend to anybody doing track work as they make a MASSIVE difference to the driving experience on track and the confidence you have with the car. I'll admit however, all these changes did restrict the appeal of the car a little - i.e. it wasn't then ideal for a leisurely Sunday evening drive around the countryside, but that was not its purpose, so didn't bother me.
I guess ultimately it depends on what you want to use the car for. If I had my time again, I would still lose the reat seats and the sound-deadening, I would probably still fit the half-cage and harnesses too, but I would go for some slightly less compromising front seats and keep the air con. My view is that this way, you would have the perfect car for all occasions!
Anyways, I removed front (replaced with Corbeau Sprints) and rear seats, all sound deadening (replaced the carpets) and the air-con condensor, but then fitted a 30kg half-cage. What to say? Well, I reckon the car was about 80kg lighter than factory, yet it was still perfectly balanced (measured on professional digital scales at all 4 corners), and behind the KW suspension, it was undoubtedly the biggest improvement I made to the car. Whilst the cage obviously added some weight, it also added some noticeable stiffness and of course, allowed me to use harnesses, which I would recommend to anybody doing track work as they make a MASSIVE difference to the driving experience on track and the confidence you have with the car. I'll admit however, all these changes did restrict the appeal of the car a little - i.e. it wasn't then ideal for a leisurely Sunday evening drive around the countryside, but that was not its purpose, so didn't bother me.
I guess ultimately it depends on what you want to use the car for. If I had my time again, I would still lose the reat seats and the sound-deadening, I would probably still fit the half-cage and harnesses too, but I would go for some slightly less compromising front seats and keep the air con. My view is that this way, you would have the perfect car for all occasions!
Peter Empson
PCGB Member
Sorry, haven't the foggiest! Really must get it on some scales, it wont be very light as it has a 16kg half cage, 35kg supercharger etc. If I had to guess I'd say somewhere in the 1100kg area, and hopefully well under 1200kg, but it is just a guess. What I can say is it's incredibly easy to push around, I push it up a gentle slope to get it into a garage buy myself and I certainly couldn't do that with my 944S (which I guess is probably about 1300kg ish).
Hilux
New member
I must say that I keep seconding this man.
He`s not wrong.
To add also that loss of unsprung weight makes a humungeous difference to agility.
It is generally considered that 50kg weight loss can equate to 10bhp gain so by that reckoning in an earlier post 100kg at 7% of 250bhp = approx 18 bhp bearing out the theory.
Neil Haughey
New member
In a track car it is well accepted that there is a very strong relationship between vehicle mass-power and tyre-brake wear which ultimately means cost. Just look at the costs of the tyres, there half the price or less comparing 15" 16" tyres around 205 to 225 wide compared to the monster big tyres run on stuff like GT3's and they will almost certainly last longer on the lighter lower powered car as well.
....still don't believe weight loss is as great as it all sounds? The other week several of us went to Rockingham for the PCGB Club championship racing. £15K worth of 968 race car can lap it in 1:34, the week earlier 5th gear had a shootout of the £100K track special Porsche and BMW's they only went about 1 second a lap faster, all cars on road legal tyres. You have to ask yourself why it is that these new track breed supercars with such huge power outputs are ultimately only marginally quicker round a race track than a 20yr old 4 pot Porsche with 240 odd Bhp.
....still don't believe weight loss is as great as it all sounds? The other week several of us went to Rockingham for the PCGB Club championship racing. £15K worth of 968 race car can lap it in 1:34, the week earlier 5th gear had a shootout of the £100K track special Porsche and BMW's they only went about 1 second a lap faster, all cars on road legal tyres. You have to ask yourself why it is that these new track breed supercars with such huge power outputs are ultimately only marginally quicker round a race track than a 20yr old 4 pot Porsche with 240 odd Bhp.
944 man
Active member
ORIGINAL: zcacogp
Humph! What about mine? Each post lovingly hand-crafted and put together with meticulous care and attention to detail, and it all goes unappreciated!
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>FlouncesOffInAHuff<
Oli.
Calm down Oli; as soon as you take your back seats out, buy an Odyssey battery and start worrying about geometry I will promote you - it isnt personal! [
]Simon x.
Peter Empson
PCGB Member
Excellent, don't forget to get the angle grinder out whilst you're at it!
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