Ok, so I have decided that the best approach is to buy a track ready car such as a Radical SR8 or an Ariel Atom, or the like. It does seem like a great deal of work to try and convert any road car to be an outstanding track car.

 

A tricked out Evora 400 would put you in that league of performance even if the HP is a little lower. Lotus offers a lot of lightened "go fast" parts and a Komotec ECU upgrade puts this car in the upper echelon of performance.

As for strictly an XKR, look to copy what was done the Jaguar sports car racing series XKR's did.

 

No they don’t, 2016’s start at $84k. Low mileage ones at $90k. If you ever drove a car on a track, low mileage pristine cars are not necessary. They will look like 100k mile cars after a season.

 

So I have owned many cars to include several race cars. Corvettes (3), Cadillac CTS-V’s (3), Camaro 1LE, Mustang GT and the XKR. I was at the race shop last week and couldn’t believe it but the New Mustang 5.0 coyote GT or Shelby 350 is the bomb. Buy a used 2015-16 for mid 20’s and for another 7k have over 1000 horse power.....all bolt on, yes bolt on twin turbo kits and with a few suspension changes, wheels and tires your on the track for less then half your budget and fast really fast. Pull the interior to make room for a roll cage and your safe. Hell I'm thinking about it !!

 

I would first approach things from looking for and making a list of the tracks you want to participate at:

Then look at what organizations run events at those tracks.

Then look for which of those organizations you want to run in their events.

Then figure out a car that will be able to cross over the potential multiple organizations and events you want to participate in.

You don't want to spend money on a car only to find you can't run it.

There also may be steps required where showing up on day 1 in a top tier car may not be allowed.

Make sure your getting a car that organizations will allow you to get started with.

Another important aspect is parts supply, repair, and maintenance.

Ideally, you may be able to find a particular make of race car where a vendor/shop travels to the events you are racing at.

 

If I were young enough and wanted to start out in racing I would buy into vintage car racing. You can usually pick up a set up from someone tired and getting out at a reasonable price. The car would meet all of the track/race requirements and would most like come with it's spare parts. Get the experience and work you way up/out to more modern rides. It will also allow you to meet people on the way up. Good luck and enjoy.

 

Who is dis person please??

But seriously I don;t think ZF designed their tranny to take that type of power, but you need to ask yourself why you want to do it?

1) Bragging rights - more money than sense!
2) 0-62 - get a Tesla with ludicrous mode
3) Because you can

Most car purists with large collections keep theirs as stock as possible, if they want more power they just go out and buy it, so make most sense to just buy sommat else.

 

Pamersport used the zf in their 480hp 4.2xkr race car like yourself I was shocked .

 

There were at least a half-dozen XKR GT3's built by Apex as well 2007 Jaguar XKR-S GT3 - Silverstone Auctions

Every now & then one of them comes up for sale.

I think it'll be easier, cheaper and quicker to buy something someone else has already sunk bulk $$$'s into, than doing it yourself from scratch.