RESULTS ARE IN - 1/4 mile
#24
*100 cell cats (Standard are 400 first stage into 600 cell ..very restrictive)
*x-pipe mid pipe (We just had some bespoke mid pipe systems made up yet to fit, currently running a simple x-pipe on standard system in place of resonator)
*XKR rear box (Doubt this adds any power but there for visual enhancement)
*Cooler spark plugs to allow for further advancement in timing NGK IFR7N-10 (C2C41805)
*ECM calibrated by Old Jaguar Performance
This particular combo will easily get the n/a into the 13s with a few more exhaust tweaks and some other mods I'm looking to perform I have no doubt I will be able to bring my 13.72et down to a 13.5
Last edited by steve_k_xk; 10-15-2017 at 08:28 AM.
The following users liked this post:
ferraripete (10-15-2017)
#25
Here's the bespoke exhausts Steve is talking about;
I have one of these on my XKR now.
The tune that's in Steve's car could be flashed to any 4.2 X150 XK using an SDD diagnostic system (a proper one, not Chinese clone hacked junk).
It won't ever throw a P0420/P0430 code or check engine light because of the cats, that's been solved, as well as the improved spark, fuelling, torque limiters raised and so on.
I have one of these on my XKR now.
The tune that's in Steve's car could be flashed to any 4.2 X150 XK using an SDD diagnostic system (a proper one, not Chinese clone hacked junk).
It won't ever throw a P0420/P0430 code or check engine light because of the cats, that's been solved, as well as the improved spark, fuelling, torque limiters raised and so on.
The following 2 users liked this post by Cambo:
Datsports (10-15-2017),
ferraripete (10-15-2017)
#26
#27
Pete, for the center section there are a few vendors with it: or look up a local race exhaust fabrication place and have them make something.
I would just do it all in one step, doing it in stages is just taking things apart and putting them back together multiple times.
https://www.spires-st.com/product/xk...age-1-exhaust/
https://www.adamesh.co.uk/jaguar-xk-...tem-4324-p.asp
I would just do it all in one step, doing it in stages is just taking things apart and putting them back together multiple times.
https://www.spires-st.com/product/xk...age-1-exhaust/
https://www.adamesh.co.uk/jaguar-xk-...tem-4324-p.asp
#28
I had a quantity of the exhausts made in Sydney by an exhaust specialist who has a CNC bender, this was cheaper than buying them in from overseas, purely because of shipping something big & bulky costing just as much as the exhaust itself.
If you change the exhaust and the cats together, then yes it is much louder than stock, changing the exhaust and leaving the original cats is not too much louder.
If you change the exhaust and the cats together, then yes it is much louder than stock, changing the exhaust and leaving the original cats is not too much louder.
#29
We can get a price for you in regards to the bespoke mid-pipe just unsure how much postage to the U.S would be
With the tune PM either me or Cambo and we can get you set-up
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#33
Let's try and kept criticism constructive
Last edited by steve_k_xk; 10-15-2017 at 08:30 PM.
#34
Enjoy the ride.
#35
The following 3 users liked this post by Tervuren:
#36
Steve it doesn't offend me I was just asking if this was for bragging rights. That's all , nothing more. How others want to spend their money and time is up to them I was just trying to sort out the logic. I've found with cars there is always a faster ,more powerful, more expensive , better looking ones out there.
Enjoy the ride.
Enjoy the ride.
custom , just do it .
its just a bonus that there are results in this instance.
and i think results that are well worth sharing .
did yo see its damn near as quick as a stock 4.2 SC ?
that is worth bragging about .
ill bet steve is enjoying the ride , in his ''faster than any one else's 4.2 XK8.
keep the bragging up thanks steve .
'
#37
Steve it doesn't offend me I was just asking if this was for bragging rights. That's all , nothing more. How others want to spend their money and time is up to them I was just trying to sort out the logic. I've found with cars there is always a faster ,more powerful, more expensive , better looking ones out there.
Enjoy the ride.
Enjoy the ride.
Thanks Jagtoes
Im not into this for bragging rights, I simply wanted to improve the performance of my XK with a methodical approach it just so happens that the fruits of my continuous research is finally starting to pay off !
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