hey i have a 1973 xj12 and was looking at electronicly fuel injecting it. how would i go about doing that and how rare are these type of jags.

all your help will be appreciated

 

Too expensive and time consuming if you ask me. Besides, it isn't like there are a lot of series I V12 cars around. I'd keep it as is and just make it run as best as possible.

 

she already runs and looks beautifull so want to give it a bit more power and make it a bit more fuel efficent. any help would be great =)

 

If you could find a mid-late 70s XJ12 as a donor car you could swap over the entire FI system lock, stock, and barrel. Should be entirely doable...with enough time and effort. I wouldn't consider it without a donor car alongside, personally.

Or were you thinking about some sort of aftermarket FI system?

Cheers
DD

 

Hello '73:

I can't emphasise this enough, your car is very rare. I have been searching for about a year and let me assure you that even wrecks and recognizale cars are very thin on the ground. Good ones very very very rare. They were only just gotten into production when the series II was introduced. Series II cars are much more available, well sort of.

That said I cannot see the benefit of what you propose. Harsh reality is you will never see any real fuel economy with this car and it begs the question "Why wouldyou be concerned?" Certainly you couldn't be considering this as a daily driver???

Supposing you do find a series III donor and you swap all the injection over. |
Lets assume you get it perfect and forget the lenght of time your car will be sidelined. OK?
You will see no more than 15 to 20 MPG at the BEST and most IDEAL.
I own three purrfectly running V-12 cars and those figures are reality.
For an occasional driver it would take fifty years for this conversion to repay
you in fuel savings.

I believe this to be a bad path to go down.
However the good news is this, you have a rare car that you can be proud of.
If it runs in a reliable way you have a very interesting eye grabbing car that can only increase in value.

I would say congratulations on that car...without even seeing picture!

I would encourage you to enjoy the car as, and post some pics!


JustV12

 

hey mate thanks for yout input, much aprecciated =) y have you been looking for so long for 1? i dont plan on using it as a daily driver i have a 79 galant that is bloody good on juice for a lil 1600. going to use the jgas to goto events and hust a weekend car. i dont want to change the body just upgrade the motor a bit. i have a mate who wants me to buy his v12 with 6 webber carbs on it lol i am pretty tempting but thatd be another huge gas bill =) i have posted 3 pics on the forum of the car. they are pretty **** but will get better 1s soon. hope u like and would enjoy learning more about the cars since u must have a fair bit of knowledge about them. im only 20 and shes my second car so yea i love it. at the moment shes not going because starter motor decided to die =( but got another 1 so its all good