Thread: Confirmation of my plan required please

I can't help you with the injector plug polarity, for security I wire the injector-cut harness directly into the main engine loom. Some of the adaptor harnesses I have been given have been absolute garbage, pins fall out under pressure, poor sealing etc.

As for the injector nozzles, you can move them to the radius between the intake runner and the gasket flange.

I have always used the coil negative for RPM input, haven't noticed any signal drop-out on decel. The injectors however do cut out which is normal.

I have installed plenty of lpg injectors horizontally, they seem to be fine that way. If yours are very compact they could be fitted underneath the manifold's top section but it makes servicing difficult.

Is this the area you mean Bee Utey

Whatever your red marks are pointing to, it isn't the manifold's gasket flange. I mean outwards from where these are pictured, at a 45 deg angle to the runner, pointing at the valve, right next to the petrol injector, ie about 14mm down the runner from where these are.

Like these?

Aren't these pics of the same manifold? The nozzles are still 14mm from where I said I put them.

Edit: OK I drew a few spots on the first pic:



(More or less anyway)

Excellent info as usual, Bee Utey!
Thanks heaps.

Originally Posted by ytt105

OK, I think I’m ready to commit. I’ve done heaps of research and would like some confirmation of my plans.

I will purchase a front end kit to put on my 2000 Range Rover P38 (Thor).

Get an approved fitter to supply and fit a 93ltr donut tank, a gas filler under the petrol tank flap and plumb the lot into the system I have fitted up front. Then he can sign the paper work for the famous rebate.

This is the kit I think I’ll get NGV.

It has an AEB2568D ECU which apparently is used quite a lot, so I should be able to get plenty of support if needed.

The usual place to get the RPM signal is from one of the coils, however, I believe that on the P38 you should not use the coil as it closes down when on the overrun. So the RPM signal will come from the BECM, pin 15 black/pink or the instruments, pin 10 black/pink.

I need to advise the kit supplier which pin is positive for the cut injector wiring loom. I believe, from perusal of RAVE, that would be pin 2.

Then there’s injector location!
Injector spuds will be as per this photo, but angled more towards the valves.



I will try to get the hoses up through the webbing, like BeaUty does, but hopefully at a more vertical angle if possible, to allieviate the ‘heavy fines’ problems that can occur from gas.




Convertor connection to the coolant system will be by disconnecting the throttle heater hoses and routing them to the convertor.

The ECU will go in the area near the battery.

Have I forgotten anything!

If you have the time and not in a hurry, you could install it like this. Pull the plenum off and you will see a valley under each side, this is for clearance over injector wiring.
On my conversion the LPG injectors are attached with cable ties to the petrol injector fuel rail. Short lpg injector hoses feed lpg directly next to the petrol injector.
It looks more OEM instead of having a spider on the out side.
As I said if you have time. For an installer to do it adds lots in labour.
Pic 1. injectors attached to fuel rail.


Pic 2. The completed LPG sequential system, hidden from view.
All you see is 2 extra coolant hoses, and some extra conveluted tubing to hide bundled wires.

Originally Posted by It'sNotWorthComplaining!

If you have the time and not in a hurry, you could install it like this. Pull the plenum off and you will see a valley under each side, this is for clearance over injector wiring.
On my conversion the LPG injectors are attached with cable ties to the petrol injector fuel rail. Short lpg injector hoses feed lpg directly next to the petrol injector.
It looks more OEM instead of having a spider on the out side.
As I said if you have time. For an installer to do it adds lots in labour.

That does look neater! The hose clamp count must be high though with individually mounted injectors. Many injection kits have the injectors in blocks of 2 or 4 which makes short hose placement harder. The Zavoli injectors in your pic are now superceded by smaller rail mounted injectors, I will see what the options are next time I do a Thor.