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Gas Guzzling Money Pits
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Author:  MaliA [ Tue Aug 08, 2017 19:22 ]
Post subject:  Re: Gas Guzzling Money Pits

It doesn't matter how long the car took to get to 70mph, it'll require the same amount of force to stop it.

Author:  Cavey [ Tue Aug 08, 2017 19:23 ]
Post subject:  Re: Gas Guzzling Money Pits

Guys, guys. I ain't no physics teacher. If you don't believe me, why do you suppose that a 155mph limited BMW M3 has much better brakes than an equally 155mph speed limited BMW 330i or whatever? They both do the same top speed and they both weigh the same, so why bother? And why do people always say upgrade brakes with any remap such as this?

I've tried to give examples like the bullet etc. but I can't think of any other way to explain it so I give up, as I have homemade gnocchi waiting. :)

Author:  Hearthly [ Tue Aug 08, 2017 19:39 ]
Post subject:  Re: Gas Guzzling Money Pits

I think it's fairly straightforward, as Cavey has already explained.

If you're driving towards the limits of a car, including its brakes, the notion that '70mph is 70mph' really isn't the point, it's how quickly you're getting to 70 or 100 or 120 or 140 or whatever, and how frequently you need to slow down from those speeds.

I honestly wouldn't want my S4 to be any more powerful than it already is, because as I found out over TT (when the mountain goes one-way, on what is already a derestricted road), once you've done a few sharp brakes down from 100mph+ and a lot of high speed braking in general, you'll be faced with some pretty significant brake fade, and that's a product of the car being able to get to 100mph in such a short period of time. Sure, my father-in-law's 1.4T Audi A1 will also get to 100mph eventually, but it'll do it far less often than my S4 will.

Case in point is the attached image which is the charge down to Windy Corner (this is towards the end of the mountain run), I was already easing off a bit as I'd noticed brake fade over the last mile or two, but I was borderline alarmed by how much the stopping power of the brakes had been degraded as I slowed down to the 70-75mph or so you want to be at to get round this corner without too much screeching.

So imagine punching another 80bhp into the equation, the car will be going even faster, more regularly, and the already strained brakes will be pushed even further, it's clearly not a sensible combination.

(The Type-R on the other hand has 350mm grooved and drilled Brembos, I'm really quite looking forward to seeing how it holds up when TT comes around next year.)

Attachment:
windyo.JPG

Author:  MaliA [ Tue Aug 08, 2017 20:12 ]
Post subject:  Re: Gas Guzzling Money Pits

That's because putting the brakes on changes the energy of the car's movement into heat (and sound, on occasion). The brake disk cannot dissipate that heat as fast as it is being generated, when braking repeatedly. So, vented discs exist. A car at 70mph still has the same value of momentum at 70mph no matter how many times it has been at 70mph before or how long it took to get there.

Author:  krazywookie [ Tue Aug 08, 2017 20:15 ]
Post subject:  Re: Gas Guzzling Money Pits

Taking a step back here, bigger brakes are needed because yes, more power means people drive faster. The non physics is irrelevant, people be people.

Author:  Jem [ Tue Aug 08, 2017 20:27 ]
Post subject:  Re: Gas Guzzling Money Pits

Findus Fop wrote:
Jem wrote:
GazChap wrote:
I too, have just bought a car. To Jem's eternal astonishment.


Obviously the only thing I was astonished about was how long it took you.


You must be looking forward to your new 12.9 inch iPad Pro and one of those ace smart keyboard things and a swizzy iPad pen. Very kind of Gazchap to do that.


I'm fairly sure that I said I wanted sex every day for the next 20 years if he gets a BMW but I think he's forgotten that....

Author:  MaliA [ Tue Aug 08, 2017 20:29 ]
Post subject:  Re: Gas Guzzling Money Pits

Jem wrote:
Findus Fop wrote:
Jem wrote:
GazChap wrote:
I too, have just bought a car. To Jem's eternal astonishment.


Obviously the only thing I was astonished about was how long it took you.


You must be looking forward to your new 12.9 inch iPad Pro and one of those ace smart keyboard things and a swizzy iPad pen. Very kind of Gazchap to do that.


I'm fairly sure that I said I wanted sex every day for the next 20 years if he gets a BMW but I think he's forgotten that....


Very good for dogging, those BMWs. Lots of room and lots of glass.

Author:  DavPaz [ Tue Aug 08, 2017 20:33 ]
Post subject:  Re: Gas Guzzling Money Pits

Jem wrote:
Findus Fop wrote:
Jem wrote:
GazChap wrote:
I too, have just bought a car. To Jem's eternal astonishment.


Obviously the only thing I was astonished about was how long it took you.


You must be looking forward to your new 12.9 inch iPad Pro and one of those ace smart keyboard things and a swizzy iPad pen. Very kind of Gazchap to do that.


I'm fairly sure that I said I wanted sex every day for the next 20 years if he gets a BMW but I think he's forgotten that....

8) How is that a deterrent?

Author:  MaliA [ Tue Aug 08, 2017 20:37 ]
Post subject:  Re: Gas Guzzling Money Pits

DavPaz wrote:
Jem wrote:
Findus Fop wrote:
Jem wrote:
GazChap wrote:
I too, have just bought a car. To Jem's eternal astonishment.


Obviously the only thing I was astonished about was how long it took you.


You must be looking forward to your new 12.9 inch iPad Pro and one of those ace smart keyboard things and a swizzy iPad pen. Very kind of Gazchap to do that.


I'm fairly sure that I said I wanted sex every day for the next 20 years if he gets a BMW but I think he's forgotten that....

8) How is that a deterrent?


(Types)
(Deletes)

Author:  markg [ Tue Aug 08, 2017 20:43 ]
Post subject:  Re: Gas Guzzling Money Pits

Cavey wrote:
Guys, guys. I ain't no physics teacher. If you don't believe me, why do you suppose that a 155mph limited BMW M3 has much better brakes than an equally 155mph speed limited BMW 330i or whatever? They both do the same top speed and they both weigh the same, so why bother? And why do people always say upgrade brakes with any remap such as this?

I've tried to give examples like the bullet etc. but I can't think of any other way to explain it so I give up, as I have homemade gnocchi waiting. :)

Surely bullets are slowing down as soon as they leave the barrel. How can something keep accelerating once the acceleration force is no longer being applied?

Author:  Sir Taxalot [ Tue Aug 08, 2017 23:24 ]
Post subject:  Re: Gas Guzzling Money Pits

Bigger expensive brakes look better behind big expensive alloy wheels than smaller cheaper brakes.

Author:  Mr Dave [ Tue Aug 08, 2017 23:43 ]
Post subject:  Re: Gas Guzzling Money Pits

Cavey wrote:
Cras wrote:
I get in trouble doing this, but assuming the acceleration is no longer being applied, surely the answer is that they require identical braking force?


Okay, consider a rifle bullet that weighs 10g that's been fired (the force is removed), say one hundreth of a second after it's been fired. It's travelling, say, at only 5mph, but it's accelerating like fuck.

Are you trying to win the Craster grenade physics awward or The Mr Chris Dynamo physics award?

Author:  Grim... [ Wed Aug 09, 2017 2:51 ]
Post subject:  Re: Gas Guzzling Money Pits

markg wrote:
Cavey wrote:
Guys, guys. I ain't no physics teacher. If you don't believe me, why do you suppose that a 155mph limited BMW M3 has much better brakes than an equally 155mph speed limited BMW 330i or whatever? They both do the same top speed and they both weigh the same, so why bother? And why do people always say upgrade brakes with any remap such as this?

I've tried to give examples like the bullet etc. but I can't think of any other way to explain it so I give up, as I have homemade gnocchi waiting. :)

Surely bullets are slowing down as soon as they leave the barrel. How can something keep accelerating once the acceleration force is no longer being applied?

Interesting bullet fact that's pretty obvious but a not a lot of people think through - it you shoot a bullet from a gun in a straight line (ie, not upward) and drop a bullet from your hand when you pull the trigger, they'll both hit the ground at the same time.

Author:  Sir Taxalot [ Wed Aug 09, 2017 4:13 ]
Post subject:  Re: Gas Guzzling Money Pits

What if you fire the bullet out of a speeding car? Will it be different if the car is a family hatch or a powerful uber-wagon?

Author:  Sir Taxalot [ Wed Aug 09, 2017 4:15 ]
Post subject:  Re: Gas Guzzling Money Pits

What about if I'm doing a backflip from the roof of a speeding truck AND firing a gun at the same time.

The car truck also has magnets in the wheels. And disco gear in the back.

Author:  TheVision [ Wed Aug 09, 2017 8:20 ]
Post subject:  Re: Gas Guzzling Money Pits

Don't forget it's being chased by Burtank!

Author:  Zardoz [ Wed Aug 09, 2017 9:00 ]
Post subject:  Re: Gas Guzzling Money Pits

We're all being chased by Burtank.

Author:  Mr Russell [ Wed Aug 09, 2017 9:23 ]
Post subject:  Re: Gas Guzzling Money Pits

Grim... wrote:
markg wrote:
Cavey wrote:
Guys, guys. I ain't no physics teacher. If you don't believe me, why do you suppose that a 155mph limited BMW M3 has much better brakes than an equally 155mph speed limited BMW 330i or whatever? They both do the same top speed and they both weigh the same, so why bother? And why do people always say upgrade brakes with any remap such as this?

I've tried to give examples like the bullet etc. but I can't think of any other way to explain it so I give up, as I have homemade gnocchi waiting. :)

Surely bullets are slowing down as soon as they leave the barrel. How can something keep accelerating once the acceleration force is no longer being applied?

Interesting bullet fact that's pretty obvious but a not a lot of people think through - it you shoot a bullet from a gun in a straight line (ie, not upward) and drop a bullet from your hand when you pull the trigger, they'll both hit the ground at the same time.

Assuming a completely flat piece of ground, right?

I imagine some of those more powerful guns would be able to fire far enough that you'd have to account for the curvature of the Earth.

Author:  Zardoz [ Wed Aug 09, 2017 9:28 ]
Post subject:  Re: Gas Guzzling Money Pits

Big brakes are heavier so they slow the car downier quickier.

Author:  Hearthly [ Wed Aug 09, 2017 10:13 ]
Post subject:  Re: Gas Guzzling Money Pits

Got a refund of £60 on the insurance which was unexpected, it only has a few months to run and I wouldn't have thought the Type-R was much cheaper (if at all) than the S4 to insure.

The car will be ready anytime after 2pm on Friday, so I've put in for an early finish on that day so I can go vrooom vrooom vrooom and die horribly in a magnificent torque steer catastrophe.

Author:  Zardoz [ Wed Aug 09, 2017 10:51 ]
Post subject:  Re: Gas Guzzling Money Pits

Enjoy!

Should have kept the old battery you bought for the S4 and pop it back in :)

Author:  MrChris [ Wed Aug 09, 2017 10:58 ]
Post subject:  Re: Gas Guzzling Money Pits

Single handedly keeping the second hand car trade alive in the Isle of Man

Author:  Findus Fop [ Wed Aug 09, 2017 11:10 ]
Post subject:  Re: Gas Guzzling Money Pits

MrChris wrote:
Single handedly keeping the second hand car trade alive in the Isle of Man


The car dealer(s) must have a nickname for Hearthly.

The Golden Goose?

Author:  MrChris [ Wed Aug 09, 2017 11:12 ]
Post subject:  Re: Gas Guzzling Money Pits

Findus Fop wrote:
MrChris wrote:
Single handedly keeping the second hand car trade alive in the Isle of Man


The car dealer(s) must have a nickname for Hearthly.

The Golden Goose?

I'm not sure they'd be that complimentary.

Author:  Zardoz [ Wed Aug 09, 2017 11:17 ]
Post subject:  Re: Gas Guzzling Money Pits

Oilytronic

Author:  myp [ Wed Aug 09, 2017 16:27 ]
Post subject:  Re: Gas Guzzling Money Pits

Having better brakes is important as you're doing a lot more accelerating and braking in a short space of time than you would in a more pedestrian car, as anyone who has experienced significant brake fade can attest to. I'm not getting involved in the cod-physics discussion going on here.

In other news, anyone want to buy a Type R? :D

Author:  Jem [ Wed Aug 09, 2017 17:08 ]
Post subject:  Re: Gas Guzzling Money Pits

DavPaz wrote:
Jem wrote:
Findus Fop wrote:
Jem wrote:
GazChap wrote:
I too, have just bought a car. To Jem's eternal astonishment.


Obviously the only thing I was astonished about was how long it took you.


You must be looking forward to your new 12.9 inch iPad Pro and one of those ace smart keyboard things and a swizzy iPad pen. Very kind of Gazchap to do that.


I'm fairly sure that I said I wanted sex every day for the next 20 years if he gets a BMW but I think he's forgotten that....

8) How is that a deterrent?

Deterrent? You're misunderstanding the dynamic of our relationship. :DD

MaliA wrote:
(Types)
(Deletes)

>:(

Author:  myp [ Wed Aug 09, 2017 22:36 ]
Post subject:  Re: Gas Guzzling Money Pits

Well… it's just as fast but is much more refined than the Type R. Much more torque. Auto box makes it easy to drive. Fuel economy is slightly worse but that's to be expected as it's heavier and a 3.2 V6.

There are some electrical issues though. Like it won't lock consistently from the key fob. And the driver's side wing mirror won't fold. And the passenger's side seatbelt extender doesn't work. And there's an airbag error on the dash. And the driver's side headrest won't go up and down. Some slight vibration under braking too so could be a warped disc.

This is a stupid idea! :D

Author:  Zardoz [ Wed Aug 09, 2017 22:48 ]
Post subject:  Re: Gas Guzzling Money Pits

[quote="Hearthly]
Attachment:
windyo.JPG
[/quote]
You'd be better off sticking to the road.

Author:  GazChap [ Thu Aug 10, 2017 9:00 ]
Post subject:  Re: Gas Guzzling Money Pits

Lonewolves wrote:
There are some electrical issues though. Like it won't lock consistently from the key fob. And the driver's side wing mirror won't fold. And the passenger's side seatbelt extender doesn't work. And there's an airbag error on the dash. And the driver's side headrest won't go up and down. Some slight vibration under braking too so could be a warped disc.

This is a stupid idea! :D

While reading this, I have quite literally only just realised why you sent me that picture yesterday. I genuinely thought you were complaining about some other knobber parking in your space.

I'm a dick.

Author:  myp [ Thu Aug 10, 2017 9:54 ]
Post subject:  Re: Gas Guzzling Money Pits

GazChap wrote:
Lonewolves wrote:
There are some electrical issues though. Like it won't lock consistently from the key fob. And the driver's side wing mirror won't fold. And the passenger's side seatbelt extender doesn't work. And there's an airbag error on the dash. And the driver's side headrest won't go up and down. Some slight vibration under braking too so could be a warped disc.

This is a stupid idea! :D

While reading this, I have quite literally only just realised why you sent me that picture yesterday. I genuinely thought you were complaining about some other knobber parking in your space.

I'm a dick.

A massive dick

Author:  Jem [ Thu Aug 10, 2017 10:06 ]
Post subject:  Re: Gas Guzzling Money Pits

Lonewolves wrote:
A massive dick


:hat:

Author:  GazChap [ Thu Aug 10, 2017 10:27 ]
Post subject:  Re: Gas Guzzling Money Pits

Lonewolves wrote:
A massive dick

I was young, I needed the money etc.

Is the Merc the biggest car you've owned? Looks like it's a fair bit bigger than a Type-R ;)

Author:  myp [ Thu Aug 10, 2017 13:12 ]
Post subject:  Re: Gas Guzzling Money Pits

GazChap wrote:
Lonewolves wrote:
A massive dick

I was young, I needed the money etc.

Is the Merc the biggest car you've owned? Looks like it's a fair bit bigger than a Type-R ;)

It's not that big, only a coupe. But probably still yeah!

It's also the first automatic, first V6 and first car with more than 200bhp I've owned!

Author:  GazChap [ Thu Aug 10, 2017 14:41 ]
Post subject:  Re: Gas Guzzling Money Pits

Ooh, red bits on the seats :) Amusing to me that it came from a BMW dealer at some point ;)

Looks like a nice place to be inside - very different car to the Type-R though, why the change?

Author:  Dr Zoidberg [ Thu Aug 10, 2017 16:40 ]
Post subject:  Re: Gas Guzzling Money Pits

He hates money?

Author:  myp [ Thu Aug 10, 2017 17:34 ]
Post subject:  Re: Gas Guzzling Money Pits

GazChap wrote:
Ooh, red bits on the seats :) Amusing to me that it came from a BMW dealer at some point ;)

Looks like a nice place to be inside - very different car to the Type-R though, why the change?

Wanted something a bit more grown up. The Civic was loud even when driving it sensibly.

I should be able to get £2.5k for the Civic so I'll use that £1k balance to get some of the niggles fixed.

Author:  markg [ Thu Aug 10, 2017 17:43 ]
Post subject:  Re: Gas Guzzling Money Pits

Lonewolves wrote:
GazChap wrote:
Ooh, red bits on the seats :) Amusing to me that it came from a BMW dealer at some point ;)

Looks like a nice place to be inside - very different car to the Type-R though, why the change?

Wanted something a bit more grown up. The Civic was loud even when driving it sensibly.

I should be able to get £2.5k for the Civic so I'll use that £1k balance to get some over 50s life cover and a free Parker pen just for enquiring.

Author:  myp [ Thu Aug 10, 2017 22:28 ]
Post subject:  Re: Gas Guzzling Money Pits

Sorry what do you drive again, Mark?

I loved your MX-5. Should've stuck with that.

Author:  Sir Taxalot [ Thu Aug 10, 2017 23:37 ]
Post subject:  Re: Gas Guzzling Money Pits

I like the happy sunshine air freshener dangling from the mirror

Author:  Hearthly [ Fri Aug 11, 2017 7:55 ]
Post subject:  Re: Gas Guzzling Money Pits

I'm always a bit suspicious of air fresheners in modern cars because they shouldn't smell of anything, so I automatically assume they're there to cover something up.

Author:  Zardoz [ Fri Aug 11, 2017 8:35 ]
Post subject:  Re: Gas Guzzling Money Pits

Werthers Originals.

Author:  MaliA [ Fri Aug 11, 2017 8:37 ]
Post subject:  Re: Gas Guzzling Money Pits

Hearthly wrote:
I'm always a bit suspicious of air fresheners in modern cars because they shouldn't smell of anything, so I automatically assume they're there to cover something up.


In Oman, 20 years back, the valet services offered "New Car Smell" or "Baby powder" as a finishing touch.

Author:  myp [ Fri Aug 11, 2017 10:16 ]
Post subject:  Re: Gas Guzzling Money Pits

Hearthly wrote:
I'm always a bit suspicious of air fresheners in modern cars because they shouldn't smell of anything, so I automatically assume they're there to cover something up.

My farts

Author:  GazChap [ Fri Aug 11, 2017 11:15 ]
Post subject:  Re: Gas Guzzling Money Pits

Going over to BMW in Hook on Sunday morning to take a good look over this 5GT - finance application etc. is already approved and ready to go.

I was hoping to take the car on Sunday, but they need more time to sort that out - but, in a "dealer providing good service" shocker, to save me having to make another 3-4 hour journey back down to them to pick the car up, they're going to deliver it to me on Wednesday next week. Assuming I like it, obvs.

Which I will. It's not normal for me to do this amount of research before buying a car, feels oddly... nice. Unless there's something horrifically wrong with the car, all of the dotted lines will be signed on Sunday :)

Author:  MaliA [ Fri Aug 11, 2017 11:16 ]
Post subject:  Re: Gas Guzzling Money Pits

Jem is getting the toyota, as a runabout?

Author:  GazChap [ Fri Aug 11, 2017 11:18 ]
Post subject:  Re: Gas Guzzling Money Pits

She already uses it as a runabout ;)

Author:  MaliA [ Fri Aug 11, 2017 11:20 ]
Post subject:  Re: Gas Guzzling Money Pits

Well, that's my bit of trying to put cat among pigeons for entertainment ruined. Dance, you swines, dance!

Author:  Jem [ Fri Aug 11, 2017 11:43 ]
Post subject:  Re: Gas Guzzling Money Pits

GazChap wrote:
She already uses it as a runabout ;)


Or would, if someone hadn't taken the steering wheel off.

Author:  GazChap [ Fri Aug 11, 2017 11:57 ]
Post subject:  Re: Gas Guzzling Money Pits

lolol

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