It's ALIVE again!
Senior Member
Joined: Jan 2011
Posts: 883
Likes: 173
From: Columbus, OH
I started thinking about the mods I've made and decided to make a list.
So far I've:
*Swapped engine from the original 83 to an 85. The 83 had blown head gaskets and unknown damage from heat, so I picked up a low mileage V12 from an 85 and just switched the intakes and externals.
*Removed A/C compressor, lines and cooler. I live in northern New England and it's a convertible. I'll only have it out on days when I can put the top down, so the A/C is kinda pointless.
*Removed air pump, idler pulley, airtubes, tapped and plugged air injection holes in intakes with allen screws.
*Removed cruise control bellows. (I prefer my foot on the pedal!)
*Removed Lucas alternator and replaced with higher AMP GM alt.
*Gutted the insides of the downpipes and hollowed out cat-converters.
*Removed factory mechanical fan and replaced with electric.
*Replaced fuel injection harness and most all of under-bonnet wiring.
*Upgraded ECU
*Replaced 15" wire wheels with Jaguar 16" mag rims and 235/60/16 tires.
I'd guess I've probably easily removed over 200 lbs of "stuff" with the above mentioned mods.
Next on the list is to remove factory fuel regulators and replace with single adjustable regulator with built in gauge.
Replace factory airboxes with cold air intake and low restriction air filters.
I've got a few other things on my list I plan to do as well.
So far I've:
*Swapped engine from the original 83 to an 85. The 83 had blown head gaskets and unknown damage from heat, so I picked up a low mileage V12 from an 85 and just switched the intakes and externals.
*Removed A/C compressor, lines and cooler. I live in northern New England and it's a convertible. I'll only have it out on days when I can put the top down, so the A/C is kinda pointless.
*Removed air pump, idler pulley, airtubes, tapped and plugged air injection holes in intakes with allen screws.
*Removed cruise control bellows. (I prefer my foot on the pedal!)
*Removed Lucas alternator and replaced with higher AMP GM alt.
*Gutted the insides of the downpipes and hollowed out cat-converters.
*Removed factory mechanical fan and replaced with electric.
*Replaced fuel injection harness and most all of under-bonnet wiring.
*Upgraded ECU
*Replaced 15" wire wheels with Jaguar 16" mag rims and 235/60/16 tires.
I'd guess I've probably easily removed over 200 lbs of "stuff" with the above mentioned mods.
Next on the list is to remove factory fuel regulators and replace with single adjustable regulator with built in gauge.
Replace factory airboxes with cold air intake and low restriction air filters.
I've got a few other things on my list I plan to do as well.
Do you mind telling me that Upgraded ECU exactly means?
Thread Starter
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Veteran Member
Joined: Apr 2010
Posts: 2,055
Likes: 194
From: New Hampshire
Let's find out!
I think that the injectors fire in 4 groups of three, so are the BMW versions wired the same?. If so, that would be 2 wires for each group = 8 in total?
If this is correct, then you just carefully ensure the new harness wires go into the same places as the old ones did on the power resistor?
Greg
I think that the injectors fire in 4 groups of three, so are the BMW versions wired the same?. If so, that would be 2 wires for each group = 8 in total?
If this is correct, then you just carefully ensure the new harness wires go into the same places as the old ones did on the power resistor?
Greg
Thread Starter
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Veteran Member
Joined: Apr 2010
Posts: 2,055
Likes: 194
From: New Hampshire
I went from a 6cu to a 16cu. It was on the later models.
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From: France
Greg
Senior Member
Joined: Jan 2011
Posts: 883
Likes: 173
From: Columbus, OH
Hope it works, or you'll owe me a coffee and croissant
Veteran Member
Joined: Jan 2012
Posts: 14,577
Likes: 10,773
From: France
Ok, I just bought one: JAGUAR XJS V12 LUCAS ECU ECM FUEL DAC4118 16cu 84526B | eBay
Hope it works, or you'll owe me a coffee and croissant
Hope it works, or you'll owe me a coffee and croissant
Greg
Senior Member
Joined: Jan 2011
Posts: 883
Likes: 173
From: Columbus, OH
Overall, it is a success, thanks!
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Joined: Oct 2011
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From: WV
how do you tune your setup?
Senior Member
Joined: Jan 2011
Posts: 883
Likes: 173
From: Columbus, OH
Kirby Palm describes procedure in detail, but it has to do with adjusting one and only potentiometer on the ECU box. The rest is adjusting TPS position and measuring O2 sensor readings. to make sure car runs not too rich, or lean.
Thread Starter
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Veteran Member
Joined: Apr 2010
Posts: 2,055
Likes: 194
From: New Hampshire
Just for the record, you can make a cheap and easy adjustment tool for the ECU lean/rich adjuster. I took a 6 inch long piece of metal fuel line (I forget what size though) and ground the end of it a little thinner, then squeezed a flat spot onto it. It works quite well.
Thread Starter
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Veteran Member
Joined: Apr 2010
Posts: 2,055
Likes: 194
From: New Hampshire
Drove the car for the first time today from my driveway to my neighbors and back. Each driveway is nearly a 1/4 mile long, but the car isn't registered so I didn't dare take it out on the road. I put the top down and the ole' girl seemed to go pretty good!
Here's a pic with the top down but without the parade cover over the top.
Here's a pic with the top down but without the parade cover over the top.