XK / XKR ( X150 ) 2006 - 2014

The worlds fastest XKR 5 L supercharged

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Old Dec 2, 2023 | 12:47 AM
  #61  
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I thought this thread had turned a corner into sensible discussion, obviously not.
It seems clear to me at least who is behaving more like a 12 year old.
If people don't have anything constructive or useful to add it may be best not to post and just move on.
 
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Old Dec 2, 2023 | 04:08 AM
  #62  
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Default good morning

Originally Posted by steve_k_xk
I have been keeping myself up-to-date with their most recent build, the XK8, and it's performing quite well on the track. There's no doubt that you are in very capable company with Swallows. It does sound like you have taken quite a methodical approach to this particular build, and I am quite eager to see the different stages of this project take place

Along with the carbon wheels, gearbox, and obviously increased engine power, have discussions taken place in regards to further weight reductions, suspension upgrades, and increased braking capabilities? I would love to hear what you potentially have in mind for these areas of the build.
carbon Wheels yes, eight-speed manual gearbox with a shorter prop shaft, and as many mods as Tom thinks necessary to the engine.
Viezu technologies have taken the car as far as they can. although she already has upgraded breaks, and I’m not a fan of carbon fiber, unless you are racing, which I don’t really intend to do with a cabriolet it would be a bit silly.
I took Tom‘s advice on the suspension upgrades which he said just replace old for new because I wanted still drive in and out of cities and apparently the OEM suspension is the best product possible according to Tom for what use I want
in and out of cities and apparently the OEM suspension is the best product possible according to Tom for what use I want.
now, since Tom recommended the brake upgrades pads and rotors basically
The only improvements left are the gearbox pop shaft, some maybe porting of the engine changing of the heads, however, most of what we will achieve will be the gearbox and the lightning of the wheels.
I do hope that explains everything to you and thank you for not being a skeptic
 
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Old Dec 2, 2023 | 08:35 AM
  #63  
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You should proofread what you wrote before you post it.
 
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Old Dec 3, 2023 | 03:23 PM
  #64  
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Anything to reduce non-sprung weight will provide quicker acceleration. Carbon fibre wheels can come in under 10 pounds apiece vs forged wheels at just under 20 pounds each (nearly half the weight of OEM alloys wheels), however they're quite delicate and expensive, as much as $40 grand for a set. Carbon ceramic brakes are less costly than carbon wheels and can save you the same amount of non-sprung weight over steel discs so why not do that???
 
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Old Dec 3, 2023 | 10:53 PM
  #65  
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Default I would suggest you talk to Tom at swallows racing

Originally Posted by Quadcammer
8 speed manual huh?

Which one?

This is all a massive load of bs. Perhaps a 12 year old
I believe he knows a little bit more than you!
 
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Old Dec 3, 2023 | 10:58 PM
  #66  
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Originally Posted by jahummer
Anything to reduce non-sprung weight will provide quicker acceleration. Carbon fibre wheels can come in under 10 pounds apiece vs forged wheels at just under 20 pounds each (nearly half the weight of OEM alloys wheels), however they're quite delicate and expensive, as much as $40 grand for a set. Carbon ceramic brakes are less costly than carbon wheels and can save you the same amount of non-sprung weight over steel discs so why not do that???

so I totally agree with you, however, due to my driving style and In-N-Out of London carbon, ceramic breaks are not conducive to that they need to be warm at most times. Otherwise they become almost useless I was recommended. Tarox F2000 and Strada pads all round.
 
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Old Dec 4, 2023 | 01:17 AM
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I have got carbon ceramic brakes on my Aston and they behave just like the brakes on my Jag around town, no need to warm them up. They come into their own on the track or the open road as there is no brake fade, however hard you push them.
 
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Old Dec 4, 2023 | 02:57 AM
  #68  
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Default Thanks good to know

Originally Posted by u102768
I have got carbon ceramic brakes on my Aston and they behave just like the brakes on my Jag around town, no need to warm them up. They come into their own on the track or the open road as there is no brake fade, however hard you push them.
if they were save that much weight and you say there’s not a lot of difference in using them in town remember we have a stop start policy of 20 miles an hour. I remain a bit dubious, but I will certainly check on them. Thank you very much indeed.
 
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Old Dec 4, 2023 | 07:06 AM
  #69  
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I’m a bit flummoxed because you talk about spending massive amounts of money to make the car lighter and faster but you’re saying you don’t want to save loads more weight with carbon ceramic brakes because you drive the car too slow to use them….

I’ve got the Swallow’s Tarox discs with Pagid pads fitted to mine and quite impressed with their performance over the previous AP Racing discs




 
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Old Dec 20, 2023 | 02:47 AM
  #70  
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jahummer, I see you are running 265/35/20 tires. Are those on the front or on the rear of your car?


Originally Posted by jahummer
....

 
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Old Dec 20, 2023 | 02:50 AM
  #71  
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Default Hi

I’m running 275/35/20 Michelin pilot sport2 front and 305/30/20 on the rear which is as large recommended by Jaguar
 
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Old Dec 20, 2023 | 04:37 AM
  #72  
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Originally Posted by JagRag
jahummer, I see you are running 265/35/20 tires. Are those on the front or on the rear of your car?
Front. Rears are 305/30-20.
 
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Old Dec 20, 2023 | 06:04 AM
  #73  
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Default Sorry you misunderstood

Originally Posted by jahummer
Front. Rears are 305/30-20.
275/35/20, front 305/3020 rear Michelin pilot sport 2 the largest tire recommended by Jag
 
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Old Dec 20, 2023 | 06:21 AM
  #74  
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Originally Posted by FrankTough
I’m running 275/35/20 Michelin pilot sport2 front and 305/30/20 on the rear which is as large recommended by Jaguar
You are running a 275mm width tyre on a 8.5" Nevis wheel rim ??
 
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Old Dec 20, 2023 | 06:23 AM
  #75  
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Originally Posted by steve_k_xk
You are running a 275mm width tyre on a 8.5" Nevis wheel rim ??
I believe that 8 1/2 J front 9 1/2 J rear however, swallows racing are changing the wheels to the same type of wheels they use on their race cars
 
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Old Dec 20, 2023 | 01:39 PM
  #76  
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Default YOU misunderstood

Originally Posted by FrankTough
275/35/20, front 305/3020 rear Michelin pilot sport 2 the largest tire recommended by Jag
Frank they weren't talking to you mate. Jagrag asked jahummer what size their tyres were.
 

Last edited by dangoesfast; Dec 20, 2023 at 01:42 PM.
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Old Dec 20, 2023 | 01:44 PM
  #77  
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Default Sorry, but no

Originally Posted by dangoesfast
Frank they weren't talking to you mate. Someone asked jahummer what size their tyres were.
I personally phoned Jaguar and asked them. They said they do not recommend them because they are pure summer tires and I were to hit a puddle. It would be like driving on ice, but that was the absolute maximum size tires that could be fitted without any adjustment now, the car will be sent to swallows who will change them for racing rims and do they magic to the car I have complete faith in swallows I mean come on they race jaguars although I have been told that the gearbox changed they did to manual was to a 4.2 L not a 5 L supercharged, and I’ve been given another telephone number to speak to them and a costing of about 50,000 pounds after swallows are finished with it however, that does not matter as long as I end up with the fastest fully Cabriolet car in the world.
 

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Old Dec 20, 2023 | 02:25 PM
  #78  
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Hahhaha dude you're on crack, this is hilarious.

I was talking about the comment above where Jagrag asked about the 265 tyre size. They weren't talking to you, they were asking jahummer.
 
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Old Dec 20, 2023 | 02:53 PM
  #79  
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295-35-20s on the front fit fine.
315-35s on the rear also fit.
Course you need the right wheels to make those happen. If the car is lowered, the profiles should be at 30 instead of 35. No spacers needed (nor recommended, ever)!!!
 
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Old Dec 20, 2023 | 02:57 PM
  #80  
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Originally Posted by FrankTough
I personally phoned Jaguar and asked them. They said they do not recommend them because they are pure summer tires and I were to hit a puddle. It would be like driving on ice, but that was the absolute maximum size tires that could be fitted without any adjustment now, the car will be sent to swallows who will change them for racing rims and do they magic to the car I have complete faith in swallows I mean come on they race jaguars although I have been told that the gearbox changed they did to manual was to a 4.2 L not a 5 L supercharged, and I’ve been given another telephone number to speak to them and a costing of about 50,000 pounds after swallows are finished with it however, that does not matter as long as I end up with the fastest fully Cabriolet car in the world.
Eeehhhhh, maybe fastest XKR:
Hennessey Performance Engineering now holds the record for the highest top speed achieved by a convertible vehicle. In 2016, an automobile with 1,800 horsepower and a price tag of $3 million hit a top speed of 265.6 miles per hour.

 
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