Guest Martin F Posted June 23, 2002 Share Posted June 23, 2002 I've just been reading the latest edition of Jap Performance where they are focusing on GTI-R's. I was quite shocked to see the performance difference between the standard and lightweight versions of the car. GTI-R.......................................GTI-R Ligthweight 220BHP...................................220BHP 200lb\ft...................................200lb\ft 1220Kg...................................1190Kg 134MPH (Max Spd)....................139MPH (Max Spd) 6.1s (0-60)...............................5.9s (0-60) Does the 30kg really make that much difference to times and top speeds ? I thought top speed had more to do with aerodynamics and output of the engine than weight of the car. Yes I know weight can make a big difference, but can 30kg really make THAT sort of difference ? Or is it more Jap Perfomance mag BS. Link to comment Share on other sites More sharing options...
Rob Posted June 24, 2002 Share Posted June 24, 2002 If it does then I'm stripping the interior. Link to comment Share on other sites More sharing options...
GavinL Posted June 24, 2002 Share Posted June 24, 2002 Weight has no effect on top end assuming level ground and IMO 0.2 is so small as not too be worth considering. 30kgs is hardly worth making a song and dance about. If they had chopped 100kg of the weight that would be interesting. Link to comment Share on other sites More sharing options...
Bradb Posted June 24, 2002 Share Posted June 24, 2002 If you removed the engine.. You'd save loadsa weight. * begins to hoist engine out Link to comment Share on other sites More sharing options...
Flipfinger Posted June 24, 2002 Share Posted June 24, 2002 I've got a better idea, Brad - take the spoiler off - weight saving! Link to comment Share on other sites More sharing options...
Guest Martin F Posted June 24, 2002 Share Posted June 24, 2002 Originally posted by GavinL Weight has no effect on top end assuming level ground and IMO 0.2 is so small as not too be worth considering. 30kgs is hardly worth making a song and dance about. If they had chopped 100kg of the weight that would be interesting. That's exactly what i'm thinking. 30kg is nothing i would have thought it would have been in the order of 100's of Kg's to make much of a difference. But 0.2 is a considerable amount just for shedding 30Kg's. Link to comment Share on other sites More sharing options...
Mark Ayling Posted June 24, 2002 Share Posted June 24, 2002 Did they come about those figures by driving and timing the cars themselves or are they "factory" figures? If so, it could be that they didn't launch quite as well in the heavier car...? Link to comment Share on other sites More sharing options...
Branners Posted June 24, 2002 Share Posted June 24, 2002 Theres also massive differences between cars from the same production run. Leon has seen some mkiv engines that take more abuse than they ever should, and others which dont. It could be they got a well built stripped down version and a crappy normal version. JB Link to comment Share on other sites More sharing options...
Bradb Posted June 24, 2002 Share Posted June 24, 2002 I'd sooner take my Supra's engine out than take off my Rear wing. Lakes of fire and brimstone for you my laddo... Link to comment Share on other sites More sharing options...
Mark Ayling Posted June 24, 2002 Share Posted June 24, 2002 Originally posted by Bradb I'd sooner take my Supra's engine out than take off my Rear wing. What, not even to fit a bigger one? Link to comment Share on other sites More sharing options...
Guest Martin F Posted June 24, 2002 Share Posted June 24, 2002 Originally posted by Mark Ayling Did they come about those figures by driving and timing the cars themselves or are they "factory" figures? If so, it could be that they didn't launch quite as well in the heavier car...? They are manufacturer figures. Link to comment Share on other sites More sharing options...
Doughie Posted June 24, 2002 Share Posted June 24, 2002 Originally posted by Martin F I've just been reading the latest edition of Jap Performance where they are focusing on GTI-R's. I was quite shocked to see the performance difference between the standard and lightweight versions of the car. GTI-R.......................................GTI-R Ligthweight 220BHP...................................220BHP 200lb\ft...................................200lb\ft 1220Kg...................................1190Kg 134MPH (Max Spd)....................139MPH (Max Spd) 6.1s (0-60)...............................5.9s (0-60) Does the 30kg really make that much difference to times and top speeds ? I thought top speed had more to do with aerodynamics and output of the engine than weight of the car. Yes I know weight can make a big difference, but can 30kg really make THAT sort of difference ? Or is it more Jap Perfomance mag BS. I'd agree with JB here in that, generally, a difference of 0.2secs is far more likely to be just difference between the engines / front tyre grip etc. However, if they are manufacturers figures then,being cynical, the manufacturer will want to actually SELL some of the Lightweight version, and if the performance difference between them is, essentially, nothing, then nobody would buy the lighter version. Hence their official figures show it's worth buying the lighter version. Power to weight difference between the two is just 3% (185bhp/tonne vs. 180 bhp/tonne). Final point - (as Gav said) different weight on car's with identical power / aerodynamics / gearing makes NO difference at all to top speed. Less weight will make the car *get to it's top speed* a little quicker, but ultimately both cars will reach exactly the same top speed. Link to comment Share on other sites More sharing options...
Demon Posted June 24, 2002 Share Posted June 24, 2002 But if i remember right i think the gti-r lightweight had reworked cams and ecu which would acount for the figures being different Dont hold me to that its just what i seem to remember hearing somewhere Link to comment Share on other sites More sharing options...
Rich J Posted June 25, 2002 Share Posted June 25, 2002 There could also be a difference in gear ratios that could make a slight difference in 0-60 times. Link to comment Share on other sites More sharing options...
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