Converting Carbs to EFi

[ben-dent]

I have got 2 rangie V8's, the greenlaner is carb'd and off roader is EFi, but i have been thinking that i want some more Fuel Economy,

what do i need to take off the Off roader to put on the Greenlaner, i know i will need all the Manifold, and Throttle body, air filter, Airflow meter and pipe work, but what about wiring looms, ECUs and the likes,

also if i take the ECU (under the seat t believe) can i mount it some where else, higher up?? incase i do take it through water, as i dont want to be replacing the ECU due to water ingress

Thanks In advance

[Bowie]

Best to swap the entire engine loom over, and yes, when you have you can stretch the loom & ECU right up under the dash much further away from the lack of door seals :P

You'll also need the fuel pump (higher pressure) fuel filter and possibly the tank (Probably best to swap the lot, it's not a big job).

You may find you need to switch to the EFI dizzy and coil setup, as the wiring is different, and to keep it as 'standard' as possible it would be worth doing for fault finding purposes.

Feed the ECU with power and sorted -pretty much, just label where everything goes when you take it off!

[Range Rover Blues]

What carbs have you got? because the Strombergs aren't famous for anything but becoming trouble whilst the SUs are very nice carbs and worth a few bob because of it.

If you are getting lousy economy on carbs, try a new jet kit first (needle and jet etc).  The biggest thing abvout V8s is that they cams can wear and this causes high fuel consumption because it screws up the valve timing and lift, even before it becomes obvious with a knicking at the tappets.

With a worn cam or even just cam chain you won't improve your economy that much, if at all.

ALSO, start by fitting the exhaust system from an EFI, not the fuel system, the biggest gain in power on the 3.5 EFi was the exhaust, the biggest gain on the 3.9 was the camshaft.  If you want to fit the 3.9 system which is bigger bore you need the later gearbox crossmember which doesn't protect the exhaust as much.

Don't bother retro fitting the 3.5 system either, they can be a lot of trouble.

That said the 3.9 will be running in non-diagnostic mode unless you retor fit a bunch of sensors, it doesn't need them to run but to run at it's best it does.

[ben-dent]

What carbs have you got? because the Strombergs aren't famous for anything but becoming trouble whilst the SUs are very nice carbs and worth a few bob because of it.

If you are getting lousy economy on carbs, try a new jet kit first (needle and jet etc).  The biggest thing abvout V8s is that they cams can wear and this causes high fuel consumption because it screws up the valve timing and lift, even before it becomes obvious with a knicking at the tappets.

With a worn cam or even just cam chain you won't improve your economy that much, if at all.

ALSO, start by fitting the exhaust system from an EFI, not the fuel system, the biggest gain in power on the 3.5 EFi was the exhaust, the biggest gain on the 3.9 was the camshaft.  If you want to fit the 3.9 system which is bigger bore you need the later gearbox crossmember which doesn't protect the exhaust as much.

Don't bother retro fitting the 3.5 system either, they can be a lot of trouble.

That said the 3.9 will be running in non-diagnostic mode unless you retor fit a bunch of sensors, it doesn't need them to run but to run at it's best it does.

cheers for the info, i dont have a Problem with the fuel consumption, i just thought i would see if i could get a little bit more economy out of her,

a mate of mine who works for a landy specialist has said similar things about the Cam and exhaust, so i have decided i will keep the carbs on Dent and throw another set of carbs on the other one,

the Current carbs are Strombergs, They are working OK but not the best, bt i do have a set of SU Carbs that i have been intending on throwing on for a while, (already Recon'd by myself) and i have a set of SU carbs and Maniflold in my garage,

[Range Rover Blues]

Then that's what I'd do, fit the Sus and get them tuned up properly, spend any time and money you had to hand on fitting a decent exhaust and plugs/ignition service etc.  A V8 in good tune running SUs will pretty much be the benchmark for V8 economy anyway.

[ben-dent]

Then that's what I'd do, fit the Sus and get them tuned up properly, spend any time and money you had to hand on fitting a decent exhaust and plugs/ignition service etc.  A V8 in good tune running SUs will pretty much be the benchmark for V8 economy anyway.

cheers RRB

It has a Service on a regular basis and I only use Top brand stuff, (its great being in the trade to get cheap parts :dance:)

Know what you mean about the Exhaust, mine needs re making, as i ripped half it off last outing and never fixed it properly, but am going to make a Straight through system, got tubeular headers

[Range Rover Blues]

Then use the pipe off a TDi, it has just enough silencing to work without being as restrictive.  If you can make an off-the-shefl system work you'll be glad you did nect time it gets ripped off.

Also I think the 3.5 system is routed metter as far as protection goes, although it's more difficult to change and the gearboc crossmember is slightly lower.

[ben-dent]

i just made my own system up, and she runs as sweet as a nut, i used a 50mm flexi pipe and a spare Y piece and done a twin outlet with a scilencer of an VW/ Audi with the right diameter pipe, and note :dance: i will get pics up when i finish it off fully

[Oz]

PIC's!!!! please