Increase Horse Power!!!
#1
#2
The following 3 users liked this post by motorcarman:
#3
![Default](/forum/images/icons/icon1.gif)
LOL Bob.
OBX- in all seriousness, Bob is right. If you start with an XJ8, your upside for power is limited. With an XJR there is much more headroom and power to be had. I have had both, and without a doubt, the R has the "punch" and the NA is "sorta" fast. See if you can test drive an R, or convince an owner to let you. It will open your eyes.
OBX- in all seriousness, Bob is right. If you start with an XJ8, your upside for power is limited. With an XJR there is much more headroom and power to be had. I have had both, and without a doubt, the R has the "punch" and the NA is "sorta" fast. See if you can test drive an R, or convince an owner to let you. It will open your eyes.
#4
![Default](/forum/images/icons/icon1.gif)
I have both, love them both, but there is no comparison between the two. If you want raw power, sell the xj8 and get a R. The engineers basically have maxed out the xj8, there is nothing left for you to do to gain more power.
The xj8 is what we take on long drives as it is a bit more comfortable. Lovely car.
The XJR on the other hand....mine did 0-100 in 10.5 seconds @ 18psi with the eaton supercharger. How much faster do you want to go?
The XJ8 has a weaker trans than the XJR, so say you were to use Nitrous on the XJ8, you could very well be in the market for a new tranny.
The xj8 is what we take on long drives as it is a bit more comfortable. Lovely car.
The XJR on the other hand....mine did 0-100 in 10.5 seconds @ 18psi with the eaton supercharger. How much faster do you want to go?
The XJ8 has a weaker trans than the XJR, so say you were to use Nitrous on the XJ8, you could very well be in the market for a new tranny.
The following users liked this post:
setter (03-06-2023)
#7
The following 2 users liked this post by XKRacer:
andrew lowe (04-11-2014),
King Charles (04-11-2014)
Trending Topics
#8
![Default](/forum/images/icons/icon1.gif)
In the morning, sober, off to the man cave ....... that's when all the head scratching wallet emptying etc begins. LOL ...... Then more good ideas, like build your own ECU off the interweb.... etc .....LOL ,
#9
![Default](/forum/images/icons/icon1.gif)
Wellllll not exactly..... And TBH the 8 I am referring to is an XK8 but the principal is the same, same engine.....
I bought the car originally as a crash repair with intention of doing one of my conversions on it, never got around to it, started using it as a project car, it was the first XK with XF lights fitted to the rear and various other things.
Decided at that point to see what could be done with the engine, I did not want to cheat with forced induction and the guy next door kept whispering throttle bodies to me in a subliminal kind of way and what do yer know..... Its also manual running with a Emerald K3 ECU, no cats, side exit exhaust and has gone on an extreme weight loss diet (something I could do with myself
)
Doing what I do I get asked a lot "what can be done to improve an N/A V8" in either an XJ or XK and unfortunately as has been said above, not a lot..... Yes you could make it breathe more easily, fit an induction kit, exhaust, 200 cell cats, blah, blah, blah. But the sort of money you spend on that lot to gain what, maybe 20 bhp, you could trade the 8 with the money for an R and get an extra so called 80 bhp out of the bottle and a plethora or tuning goodies as much as your pocket will take.....
Face facts 8s are for cruising Rs are for cruising quickly
I bought the car originally as a crash repair with intention of doing one of my conversions on it, never got around to it, started using it as a project car, it was the first XK with XF lights fitted to the rear and various other things.
Decided at that point to see what could be done with the engine, I did not want to cheat with forced induction and the guy next door kept whispering throttle bodies to me in a subliminal kind of way and what do yer know..... Its also manual running with a Emerald K3 ECU, no cats, side exit exhaust and has gone on an extreme weight loss diet (something I could do with myself
![Icon Wink](https://www.jaguarforums.com/forum/images/smilies/icon_wink.gif)
Doing what I do I get asked a lot "what can be done to improve an N/A V8" in either an XJ or XK and unfortunately as has been said above, not a lot..... Yes you could make it breathe more easily, fit an induction kit, exhaust, 200 cell cats, blah, blah, blah. But the sort of money you spend on that lot to gain what, maybe 20 bhp, you could trade the 8 with the money for an R and get an extra so called 80 bhp out of the bottle and a plethora or tuning goodies as much as your pocket will take.....
Face facts 8s are for cruising Rs are for cruising quickly
![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
The following 2 users liked this post by XKRacer:
andrew lowe (04-11-2014),
setter (03-06-2023)
#10
![Default](/forum/images/icons/icon1.gif)
Wellllll not exactly..... And TBH the 8 I am referring to is an XK8 but the principal is the same, same engine.....
I bought the car originally as a crash repair with intention of doing one of my conversions on it, never got around to it, started using it as a project car, it was the first XK with XF lights fitted to the rear and various other things.
Decided at that point to see what could be done with the engine, I did not want to cheat with forced induction and the guy next door kept whispering throttle bodies to me in a subliminal kind of way and what do yer know..... Its also manual running with a Emerald K3 ECU, no cats, side exit exhaust and has gone on an extreme weight loss diet (something I could do with myself
)
Doing what I do I get asked a lot "what can be done to improve an N/A V8" in either an XJ or XK and unfortunately as has been said above, not a lot..... Yes you could make it breathe more easily, fit an induction kit, exhaust, 200 cell cats, blah, blah, blah. But the sort of money you spend on that lot to gain what, maybe 20 bhp, you could trade the 8 with the money for an R and get an extra so called 80 bhp out of the bottle and a plethora or tuning goodies as much as your pocket will take.....
Face facts 8s are for cruising Rs are for cruising quickly![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
I bought the car originally as a crash repair with intention of doing one of my conversions on it, never got around to it, started using it as a project car, it was the first XK with XF lights fitted to the rear and various other things.
Decided at that point to see what could be done with the engine, I did not want to cheat with forced induction and the guy next door kept whispering throttle bodies to me in a subliminal kind of way and what do yer know..... Its also manual running with a Emerald K3 ECU, no cats, side exit exhaust and has gone on an extreme weight loss diet (something I could do with myself
![Icon Wink](https://www.jaguarforums.com/forum/images/smilies/icon_wink.gif)
Doing what I do I get asked a lot "what can be done to improve an N/A V8" in either an XJ or XK and unfortunately as has been said above, not a lot..... Yes you could make it breathe more easily, fit an induction kit, exhaust, 200 cell cats, blah, blah, blah. But the sort of money you spend on that lot to gain what, maybe 20 bhp, you could trade the 8 with the money for an R and get an extra so called 80 bhp out of the bottle and a plethora or tuning goodies as much as your pocket will take.....
Face facts 8s are for cruising Rs are for cruising quickly
![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
#11
The following 2 users liked this post by WaterDragon:
andrew lowe (04-11-2014),
setter (03-06-2023)
#12
#13
Thread
Thread Starter
Forum
Replies
Last Post
MC36
US Lower Atlantic
0
09-01-2015 07:34 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)