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Link ECU for pre-HE Jaguar V12 XJ-S


Mark R

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Hello, I am a new member of the forum. 

 

I have a pre-HE V12 Jaguar XJS (1977) and I’m looking for any suggestions and assistance in regards to a Link ECU setup.   

Budget isn’t an issue as all of the ECU options are within our budget, I’m just looking for the easiest solution.

 

If anyone’s got a basic map that would obviously be handy as well.

 

I’m not technically minded but I have a good mechanic on the job and he has recommended the Link product.

 

Cheers.

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Hi Adam,

Thanks for your reply.

we could stick with the distributor or go distributorless, both options are available to us but we would be guided by you on that matter.  How would this influence the direction we took as far as the Link ECU is concerned?

 

In regards to the intake, I think we will be sticking with the factory intake manifolds.  There is a cast alloy intake manifold on each side, each having a single butterfly throttle valve where it adjoins the air filter.
 

Cheers. 

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If you kept a distributor you only need two ignition outputs (from memory those things used 2 coils?), so you could get away with one of our small ecu's such as the Monsoon.  

If you wanted to go distributorless then you will need six ignition outputs so the Storm would be the suggested option in that case.  The Storm would also allow you to do semi-sequential injection provided you fit a trigger capable of 720 deg positioning.  Distributorless ignition and a decent trigger will usually give a significant improvement in performance and drivability,  semi sequential injection is not worth much but will possibly give a small improvement in smoothness and economy.

In either case you will really want high impedance injectors and it would be worth considering fitting a triggerwheel to the crank - and preferably a single tooth cam sensor or possibly can use the old pick-up in the distributor for cam sensor.     

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Thanks for that. 

It only has one coil feeding a single distributor.

I’ll have a chat with my mechanic about your suggestion regarding 720° trigger capability, I suppose we could do it but the alternative is to stick with the single coil / distributor, provided that you have an ECU that would accommodate that.  Please advise if this would be the case. Thanks for all your help.

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