v8 rover 4.6 with 14cux camshaft

[Naldi Lorenzo]

Hi everyone,
I'm writing from Italy. I have a Range Rover Classic V8 manual transmission and I would like to install my 4.6 V8.
my 4.6 v8 comes from a Range Rover P38 (it had GEMS injection). I bought a complete "14cux" injection (it comes from a Range Rover Classic 3.9). I want to use the 14cux injection on the 4.6 engine. I will have to use the front crankcase of a 3.9 V8 on the 4.6 engine (I will use the distributor as on the 3.9 V8). the real problem is finding a camshaft that does justice to the 4600 engine!! I want to find a camshaft with the gear for the distributor.... I will use the car on the road and for fun, rallies, and I would like to go to the sand in Africa! a friend of mine has a 2 door range rover with a 4.6 engine with gems injection, I want it to go at least like that!! It has a lot of torque and a lot of power!!!!
I read that the injectors of the 4.6 with BOSCH injection are better than those of the 3.9 and can be used with the 14cux. I think I'll use those. obviously I purchased the 4 in 1 exhaust manifolds by headman. then I'll have the control unit remapped.
The real question is: is it possible to have a 4.6 with 14cux injection that runs like my friend's engine with gems injection? if is possible have more power is better!!! Which camshaft with gear should I use?

thank you all!

[Belle427]

Any reason you want to get away from Gems as although i know little about it im sure its a much better system than the 14cux and you would be going backwards.
I seem to remember Gems being for Autos only so maybe its that.
Megasquirt may be a better option for you if you could find a tuner.

[GreenV8S]

Your best bet by far would be sticking with the GEMS engine management system. Do you have a specific reason to move away from it? It is far more capable than most mid range aftermarket ECUs.

If you want to move away from GEMs, there are many aftermarket ECUs that support coil packs. You would need to decide who is going to tune it for you, and install the system they recommend.

If you specifically want to use the prehistoric 14CUX for some reason, that would be a wierd choice but it would mean you need a distributor. That would require either a preserpentine or intermediate front end on your engine. The intermediate front end would be a far better choice since it provides a much better oil pump and uses a stronger ancillary drive system. These were used on TVRs and Morgans so not difficult to get at the time, but you may struggle to find them these days.

[Naldi Lorenzo]

GreenV8S said:

Your best bet by far would be sticking with the GEMS engine management system. Do you have a specific reason to move away from it? It is far more capable than most mid range aftermarket ECUs.

If you want to move away from GEMs, there are many aftermarket ECUs that support coil packs. You would need to decide who is going to tune it for you, and install the system they recommend.

If you specifically want to use the prehistoric 14CUX for some reason, that would be a wierd choice but it would mean you need a distributor. That would require either a preserpentine or intermediate front end on your engine. The intermediate front end would be a far better choice since it provides a much better oil pump and uses a stronger ancillary drive system. These were used on TVRs and Morgans so not difficult to get at the time, but you may struggle to find them these days.

I will use a 14cux because this engine will go under the bonnet of my range rover classic. if you use a gems the air conditioning compressor are on the left, in the rrc is on the right, i think that is different the position of cooling fan and i don't have a gems injection complete... i see thet a lot of people use 14cux with 4.6 under the bonnet of rrc or defender or in proto of Comp Safari

[GreenV8S]

Naldi Lorenzo said:

I will use a 14cux because this engine will go under the bonnet of my range rover classic. if you use a gems the air conditioning compressor are on the left, in the rrc is on the right,

I think you mean you want a perserpentine front cover. That is not the same as using a 14CUX. You'll need somebody to tune it in any case. I suggest you decide who you want to do that and take their recommendation on which ECU to use.

[Naldi Lorenzo]

GreenV8S said:

I think you mean you want a perserpentine front cover. That is not the same as using a 14CUX. You'll need somebody to tune it in any case. I suggest you decide who you want to do that and take their recommendation on which ECU to use.

I will use a front carter of 3.9 to use a distributor. If I use the 4.6 carter I can't use a distributor.
But my awner is: What camshaft you use in a 4.6 with 14cux?

[GreenV8S]

Naldi Lorenzo said:

I will use a front carter of 3.9 to use a distributor. If I use the 4.6 carter I can't use a distributor.

You still seem confused. If you want to use a distributor you will need to use either a preserpentine or intermediate serpentine front cover. I think you said you want to keep the preserpentine front cover to put the alternator in a convenient place, and that's fine. It does mean you'll lose out on the improved pumps and ancillary drive, though.

Naldi Lorenzo said:

But my awner is: What camshaft you use in a 4.6 with 14cux?

The 14CUX doesn't dictate the cam shaft. If you're using a preserpentine front cover you'll need to use a long nose style of cam. You'll need to choose the profile to suit the spec of your engine build and intended use. My 4.6 had quite a long cam before I added the blower, and it went quite well on a 14CUX - but that was in a light sports car. If it's going into a RR you probably want something with a lot of torque rather than top end performance. If you talk to the usual RV8 specialists (RPI, V8D, Real Steel, JED) they'll advise you on cam profiles.

You should talk to your engine tuner about the recommended ECU. If you use the 14CUX you'll limit yourself to a relatively small number of engine tuners, but if you've chosen somebody who specialises in the 14CUX then that's no problem.

[Belle427]

Real Steel do some nice cams, the Stump puller is supposed to be good but does require some minor head mods to fit.

[jon-yprpe]

I have put a GEMs 4.6 in a Range Rover classic.

Best bet is a Megasquirt kit - speak to Nige at Megasquirt V8 or Shaun at ExtraEfi as they can provide everything you need inc brackets, tigger wheel, coil packs, sensors and built looms. You keep your existing serp timing cover.

[GreenV8S]

jon-yprpe said:

You keep your existing serp timing cover.

If I'm following the OP correctly, they want to keep the preserpentine timing cover because it fits their ancillary layout. I suspect they are starting from a RR Classic 3.9 with 14CUX and so on and want to keep as much as possible, just swapping the long engine.

[Naldi Lorenzo]

GreenV8S said:

If I'm following the OP correctly, they want to keep the preserpentine timing cover because it fits their ancillary layout. I suspect they are starting from a RR Classic 3.9 with 14CUX and so on and want to keep as much as possible, just swapping the long engine.

yes, i start from a RRC 3.9, and i I want to keep as much as possible.