Thread: D2 4.6 conversion owners. 4.6 ECU swap & EOI.

sigh,
just ruined my entire day Mark

Originally Posted by Mark Adams

That's a very valid question. As it turns out, the D2 MAF is quite a lot smaller than the cross-sectional area of the tubing it is connected to. Using a P38 just makes more of this available (19.5% increase), so in essence it reduces an already-present restriction.

So could then modify the existing MAF to match the tube it's connected to and use the same sensor?

Originally Posted by Mark Adams

The big challenge with changing engines in these is very rarely the cost of the engine. Unless you have a manual transmission and no other equipment on the vehicle, there are major issues with interfacing to these other systems.

Also you then have a vehicle that cannot necessarily be fixed from the Land Rover parts bin, which despite its faults is readily accessible in most corners of the globe.

I've done quite a few transplants myself (and indeed have a 4.8 Litre Ford Sierra with a GEMS-managed engine in), and I know that the engine is usually less than half the cost of the job.

I agree; tongue in cheek there Mark. I know my 4.6 has far more potential.

When I had the engine in my bobbed RR comp safari with a Jag flapper style MAF and a 14CUX expertly tuned by you it went like a rocket. Admittedly there's is a fair bit of weight difference between that car and the D2 but it's lost a lot of power. it just doesn't rev like it use to.

Originally Posted by Mark Adams

Or this...

https://youtu.be/UTtexZGLeIA

Is that a modified Thor inlet manifold by ACT?

Originally Posted by Battler

Is that a modified Thor inlet manifold by ACT?

The manifold was replaced with an earlier GEMS version, allowing the plenum to bolt straight on. RPI did the work, and they used to have the photos on their Facebook page. You'll have to go a long way down to see them, as it was about April last year (2014) when it was done.

If there was enough demand, I'm sure ACT could do a plenum base to allow continued use of the inlet manifold you already have.

Originally Posted by Battler

I agree; tongue in cheek there Mark. I know my 4.6 has far more potential.

When I had the engine in my bobbed RR comp safari with a Jag flapper style MAF and a 14CUX expertly tuned by you it went like a rocket. Admittedly there's is a fair bit of weight difference between that car and the D2 but it's lost a lot of power. it just doesn't rev like it use to.

There's no obvious reason why it shouldn't go as well as it did before. You already know it would benefit from reprogramming, but apart from that it is really worth checking that your MAF is performing properly. I consider them to be consumables really. Do you know the history of yours, and do you have access to any test gear?

Originally Posted by Mark Adams

There's no obvious reason why it shouldn't go as well as it did before. You already know it would benefit from reprogramming, but apart from that it is really worth checking that your MAF is performing properly. I consider them to be consumables really. Do you know the history of yours, and do you have access to any test gear?

I do have a stuffed MAF which is playing havoc with my LPG but no codes or symptoms though when running on petrol. New MAF is ordered from the UK.
Cheers

Originally Posted by Battler

I do have a stuffed MAF which is playing havoc with my LPG but no codes or symptoms though when running on petrol. New MAF is ordered from the UK.
Cheers

A scrapyard-dodging MAF will definitely mess up your system. In the early stages they don't put up fault codes, but quite often you'll see random cylinder misfire codes starting to appear.

You do need a genuine Bosch meter though, not a junky Chinese copy. The Bosch MAF does not last forever, and if it has done has done over 100,000 Kilometres (80,000 Miles) then I would replace it with a new one. Really I consider them to be consumables, and replace them as a matter of course at this mileage

On my last tuning trip to Dubai, I had five Disco 2s in for tuning, and every one of them had a shot MAF.