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ORIGINAL: Hilux
I love discussions like this, its like being in a nice warm pub with your mates on a PistonHeads `hoon` [
Correct - primarily heat hence my summation (regarding larger brake pad/disc areas) that if you have mahoosive power and mahoosive straight line speed momentum that carries the car into a corner you then have a huge amount of kinetic energy that has to be lost quickly, very quickly. The only other option is to slow down earlier and brake for longer (however the latter course of action is why most brakes light up or fade due to poor driver skills and uncertainty) As the Ke is turned to heat there must be direct proportion (for as we all know you cannot create nor destroy energy, only convert it) so increasing engine output by a given percentage and travelling correspondingly faster at a given point before braking will roughly correlate to a similar additional proportion of heat generated at the brakes that needs to be lost.
Remember also that bigger brakes/discs offer a much better mechanical advantage as the disc diameter increases so in theory standard calipers will be more efficient on larger discs BUT the amount of heat will be the same [admittedly with a larger moving mass (disc) within which to spread/cool/lose it] As an example I`m playing with 256mm but considering fitting 288mm discs to the Mk 1 Golf (nominally 60mm bigger than OEM)
But forgetting all the technical stuff - to get back to my original point - which was to try and offer some courses of action to Nick (Appleton) - unless you are tracking seriously and want a stripped out racer, there are real tangible advantages in improving the current cars dynamics. Most people I know that track their cars spend a fortune on them for perhaps three or four days/evenings a year?? Theres nothing wrong with that because I have been guilty myself................. and we all love those shiny bits dont we..................... whereas simply driving your well prepared car regularly at speed on track using the money saved on major upgrades or shiny bits etc for more track time will invariably lose more than those 80kgs as your lap times drop requiring only removing unwanted kit like the spare, stickier tyres and decent pads and fluid.
On the other hand I`ll have to admit my quest to lighten the Golf is ongoing.......................................[8|][8|]
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] It was/ is an awesome track machine, but the 15l fuel tank was a bit limiting, and it was very uncomfortable on the road. It sounded great on twin 45's at 7k rpm []
I wouldn't bother yet.. I ran a Mk1 Fiesta track car (ex. race car with approx 140hp) on a standard brake setup (with better pads) - it was more than adequate, even with trackday tyres. [
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] - I have some servicing to do & then I need a track day in April before I head off to Germany (we have some spare seats for passengers if you're interested Peter - mind you, your car would be ace out there, even if the journey was a bit wearing [])
ORIGINAL: Hilux
........John, sorry this thread has gone off the rails..................my fault
How`s your back [
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ORIGINAL: John Sims
It was significantly better yesterday morning until I wrestled a less than helpful small boy out of his bed which set my back back again. [
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]?? I bet one of the more noticeable aspects is improved turn in with less weight transfer? ])
ORIGINAL: Hilux
Peter
I`ve just realised your cars up and running at last, well done. Any piccies [
On a safety note (I`m a PM in the construction industry) as a rule of thumb if you have to raise your voice to another person at 1m distance you should consider hearing protection and if you have to shout you NEED hearing protection or you will suffer damage.
] The awful temporary lights will be gone soon, replaced by the very first set of the new Deutsch Nine lights, which will be far more in keeping with the rest of the car. ]... Wimps!).
ORIGINAL: John Sims
This is pure speculation on my part and no doubt someone (944man [
] Youll never convince me that a nomex lining in a helmet serves any useful purpose though; even where youre wearing underwear, a good three layer suit and an approved balaclava, youll still obtain horrific burns to the rest of your body before the lining makes a difference...
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