DIY XKR-S GT - raid the junkyard - Page 4 - Jaguar Forums - Jaguar Enthusiasts Forum


XK / XKR ( X150 ) 2006 - 2014

DIY XKR-S GT - raid the junkyard

Reply
 
 
 
Thread Tools Search this Thread
  #61  
Old 02-24-2017, 09:51 AM
Senior Member
 
Join Date: Oct 2012
Location: Florida/NYC
Posts: 124
Thanked 37 Times in 25 Posts
Default

Hey Jahummer, where in Florida are you? Do you have a shop of your own, or do you just toy with the car for fun?
Reply With Quote
  #62  
Old 07-28-2017, 03:28 PM
Veteran Member
 
Join Date: Dec 2008
Location: Florida
Posts: 3,094
Thanked 460 Times in 339 Posts
Default

Purchased a new rack direct from Jaguar and installed it today. HUGE difference. At low speed steering is VERY tight, heavy and stiff. Response at higher speeds is heavier but quicker. Does not feel like the same car and is going to take some time to get used to.
Reply With Quote
  #63  
Old 07-28-2017, 07:03 PM
Cambo's Avatar
Thread Starter
 
Join Date: Jan 2011
Location: Sydney, Australia
Posts: 7,671
Thanked 3,111 Times in 1,908 Posts
Default

Have you still got the variable assistance turned off in the CCF? If so try turning it back on and see what it's like?
Reply With Quote
  #64  
Old 07-28-2017, 08:25 PM
Veteran Member
 
Join Date: Dec 2008
Location: Florida
Posts: 3,094
Thanked 460 Times in 339 Posts
Default

Quote:
Originally Posted by Cambo View Post
Have you still got the variable assistance turned off in the CCF? If so try turning it back on and see what it's like?
Yes it is still off. Plan to enable it when I make some other adjustments and load that last map.
Reply With Quote
  #65  
Old 09-22-2017, 09:11 AM
Cambo's Avatar
Thread Starter
 
Join Date: Jan 2011
Location: Sydney, Australia
Posts: 7,671
Thanked 3,111 Times in 1,908 Posts
Default

Well, the XKR-S GT / F-Type brake ducts fit on a regular XKR just fine...

DIY XKR-S GT - raid the junkyard-image1.jpg

DIY XKR-S GT - raid the junkyard-image2.jpg

DIY XKR-S GT - raid the junkyard-image3.jpg

DIY XKR-S GT - raid the junkyard-image4.jpg

They hang down a fair bit lower than I expected, very much in the air stream so you can expect that they actually work.
Reply With Quote
The Following 4 Users Say Thank You to Cambo For This Useful Post:
dcmackintosh (01-17-2018), jahummer (09-22-2017), Panthro (09-27-2017), Sean W (09-22-2017)
  #66  
Old 01-17-2018, 10:07 AM
Senior Member
 
Join Date: Nov 2017
Location: Hood River, Oregon, USA
Posts: 132
Thanked 20 Times in 12 Posts
Default

Quote:
Originally Posted by Cambo View Post
Well, the XKR-S GT / F-Type brake ducts fit on a regular XKR just fine...
It's good to see these would be an inexpensive upgrade and would likely make a noticeable improvement on the track. I assume the existing fasteners work?
Reply With Quote
  #67  
Old 01-17-2018, 11:29 AM
Ranchero50's Avatar
Veteran Member
 
Join Date: Mar 2017
Location: Hagerstown MD
Posts: 1,649
Thanked 401 Times in 304 Posts
Default

Quote:
Originally Posted by dcmackintosh View Post
It's good to see these would be an inexpensive upgrade and would likely make a noticeable improvement on the track. I assume the existing fasteners work?
Zoom into the first pic, they just clip over the existing wish bone arm. Dead simple part and probably easy to duplicate if someone was so inclined.
Reply With Quote
The Following 2 Users Say Thank You to Ranchero50 For This Useful Post:
dcmackintosh (01-17-2018), Panthro (01-25-2018)
  #68  
Old 01-17-2018, 12:35 PM
Senior Member
 
Join Date: Nov 2017
Location: Hood River, Oregon, USA
Posts: 132
Thanked 20 Times in 12 Posts
Default

Quote:
Originally Posted by Ranchero50 View Post
Zoom into the first pic, they just clip over the existing wish bone arm. Dead simple part and probably easy to duplicate if someone was so inclined.
Thanks, I couldn't see it well on my phone. It does appear to be very simple and even around $50 for the pair is probably ridiculous, but I suppose we should be thankful it isn't more.
Reply With Quote
  #69  
Old 01-29-2018, 05:32 PM
8bit's Avatar
Senior Member
 
Join Date: Oct 2013
Location: Scotland
Posts: 364
Thanked 86 Times in 62 Posts
Default

Quote:
Originally Posted by Cambo View Post
Have you still got the variable assistance turned off in the CCF? If so try turning it back on and see what it's like?
Where does one find the setting for that, do you know? I'm interested in this.
Reply With Quote
  #70  
Old 01-29-2018, 08:17 PM
Veteran Member
 
Join Date: Dec 2008
Location: Florida
Posts: 3,094
Thanked 460 Times in 339 Posts
Default

Quote:
Originally Posted by 8bit View Post
Where does one find the setting for that, do you know? I'm interested in this.
Sorry I never updated this, but I did turn the assist back on in the CCF. Honestly I can’t really feel
A difference. Perhaps at speeds above 100mph I may but have yet to take it higher than that yet. The most appreciable change was going from the standard equip’d rack to the GT rack. Made it a completely different car.
Reply With Quote
  #71  
Old 01-31-2018, 11:39 AM
8bit's Avatar
Senior Member
 
Join Date: Oct 2013
Location: Scotland
Posts: 364
Thanked 86 Times in 62 Posts
Default

No worries, thanks for getting back to me. So is that all you can do with the CCF, switch the assistance on or off? You can't enable or disable the maps available in the software?
Reply With Quote
  #72  
Old 01-31-2018, 03:21 PM
Veteran Member
 
Join Date: Dec 2008
Location: Florida
Posts: 3,094
Thanked 460 Times in 339 Posts
Default

Quote:
Originally Posted by 8bit View Post
No worries, thanks for getting back to me. So is that all you can do with the CCF, switch the assistance on or off? You can't enable or disable the maps available in the software?
The maps are stored in the cluster (probably
for speed data) and so far I donít know of anyone who has attempted to modify them, perhaps it is because they are also embedded in the cluster software which canít get a bit tricky since odometer info, vin, etc are stored there as well.

I have heard there are indeed various maps over the years and the one for my XKR differs from the R-S and perhaps the GT as well but what those maps afford is unknown to me. And while the Servotronic II assist is speed based I am not sure how much benefit there really is to it.
Reply With Quote
  #73  
Old 02-05-2018, 06:24 PM
8bit's Avatar
Senior Member
 
Join Date: Oct 2013
Location: Scotland
Posts: 364
Thanked 86 Times in 62 Posts
Default

OK thanks again - I wasn't looking to modify the maps as such, just see if there was any control over which one(s) were used under certain conditions. I'd have liked maybe just a little more weight in the steering if there was a way to do that without having to swap out hardware was all.
Reply With Quote
  #74  
Old 02-05-2018, 07:53 PM
Veteran Member
 
Join Date: Dec 2008
Location: Florida
Posts: 3,094
Thanked 460 Times in 339 Posts
Default

Quote:
Originally Posted by 8bit View Post
OK thanks again - I wasn't looking to modify the maps as such, just see if there was any control over which one(s) were used under certain conditions. I'd have liked maybe just a little more weight in the steering if there was a way to do that without having to swap out hardware was all.
I wish it were that easy but the majority of the steering feel comes from the rack gear ratio and hydraulic assist valving. I believe the servo assist is primarily to ease parking and affect the amount assist over various speeds.
Reply With Quote
  #75  
Old 02-05-2018, 08:23 PM
Ranchero50's Avatar
Veteran Member
 
Join Date: Mar 2017
Location: Hagerstown MD
Posts: 1,649
Thanked 401 Times in 304 Posts
Default

Quote:
Originally Posted by jahummer View Post
I wish it were that easy but the majority of the steering feel comes from the rack gear ratio and hydraulic assist valving. I believe the servo assist is primarily to ease parking and affect the amount assist over various speeds.
And what is really mind blowing from a machinist stand point is that the rack has variable pitch so in the center there's much less wheel angle change per degree of steering input versus the outer areas. Pretty clever when you think about it. Really stable at speed but turns lock to lock quicker with less steering wheel input.
Reply With Quote
The Following 2 Users Say Thank You to Ranchero50 For This Useful Post:
Panthro (02-07-2018), ralphwg (02-07-2018)
  #76  
Old 02-07-2018, 11:42 AM
8bit's Avatar
Senior Member
 
Join Date: Oct 2013
Location: Scotland
Posts: 364
Thanked 86 Times in 62 Posts
Default

Quote:
Originally Posted by Ranchero50 View Post
And what is really mind blowing from a machinist stand point is that the rack has variable pitch so in the center there's much less wheel angle change per degree of steering input versus the outer areas. Pretty clever when you think about it. Really stable at speed but turns lock to lock quicker with less steering wheel input.
That took some getting used to for me when I bought my car. To this day it still catches me out a bit when I change over to my wife's Mercedes and back.
Reply With Quote
 
 
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Advertising
Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 07:22 PM.


JAGUAR and its logo are the registered trademarks of Jaguar Cars Limited. Jaguar Cars Limited is not affiliated with JaguarForums.com. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: