4.0 TO 4.6 IN DISCOVERY 2 WITH MOTRONICS M5.2.1

kevcon · Post by **kevcon** » Fri Aug 12, 2011 7:10 pm

After meeting up with everyone on the 23rd for the rolling road day. I was left feeling very cheesed off. A 4.6 with cam produced 4hp more than a standard 4.0 and 34Nm less aswell

Run smoothly and pulled well but left wondering where the hell the power had gone.

Answer: It is there, just the motronics still thinks its a 4.0 and is trying its hardest to produce 4.0 power.

Have read everything, everywhere as a little stubborn to ask and low and behold it was under my noise all the time.
In the work shop manual is the following found it when look up how to adjust the throttle linkage .

The V8 engine is equipped with the Bosch Motronic M5.2.1 engine management system. This system is a sequential
multiport fuel injection system controlled by an Engine Control Module
A single ECM is used for the control of the existing 4.0 litre engine and the new 4.6 litre engine introduced with 03
model year vehicles for the NAS market only. The ECM contains the tunes for both engines variants. When the ECM
is replaced, TestBook/T4 must be used to select the correct tune to match the engine fitment.

.
Well off to the dealership tomorrow and will post results.

Hope this helps others who are think of doing the change.

kev

topsparks · Post by **topsparks** » Fri Aug 12, 2011 8:08 pm

Let me know how you get on I should be collecting my tophated 96mm block this weekend,once its all put back together with an off set ground 4.6 crank will be going in my 03 Disco 2.

kevcon · Post by **kevcon** » Fri Aug 12, 2011 9:45 pm

Mmmm sounds tasty
Any head work being done. What cam?

Will do
kev

kevcon · Post by **kevcon** » Sat Aug 13, 2011 8:39 pm

Went to 2 dealerships today both declined doing it as did not what to be liable for any damaged that might be coursed.
Now looking for an independent garage or someone with a Testbook/T4 in the south-east

will keep you all posted on any news

kev

topsparks · Post by **topsparks** » Sun Aug 14, 2011 10:23 pm

My friend works for Autologic and has the leads for our car,where abouts are you? he's near me in Iver Heath.Have a Piper 270 cam and in a private deal with Shaun (who works for a V8 specialist in Lincs) had the heads ported ,got the chap whos doing my engine to rework them as despite telling me me had, he didn't take the guides out before he had them ported .He's done a great job(Paul @Classic and Modern engines in Bracknell).

kevcon · Post by **kevcon** » Sun Aug 14, 2011 11:35 pm

Down on the south coast. But a quick blast up the M20 & around the 25 can be done.
Have you a phone number for him?
as would like to get this done before I go away next weekend.

v8rob · Post by **v8rob** » Mon Aug 15, 2011 7:21 pm

topsparks wrote:My friend works for Autologic and has the leads for our car,where abouts are you? he's near me in Iver Heath.Have a Piper 270 cam and V8Developments did the heads,got the chap whos doing my engine to rework them as they did't take the guides out before they ported them.He's done a great job(Paul @Classic and Modern engines in Bracknel).

Hi James, is there anyway you can reword your statement about not taking the guides out when we did your heads please? i may be wrong but it was a private deal between you and suan done on a budget for you and nothing to do with v8 developments, i personally believe the heads that we produce are the best on the market and messages like this allways make prospective customers think twice thanks Rob

kevcon · Post by **kevcon** » Mon Aug 15, 2011 8:15 pm

Phoned Mick today mate.
He thought I was you

Anyway sounded interested and is having a word with the Land Rover lads tomorrow.
Watch this space.
kev

topsparks · Post by **topsparks** » Mon Aug 15, 2011 8:53 pm

There's no way two people can be that ugly!

kevcon · Post by **kevcon** » Wed Aug 17, 2011 6:23 pm

Quick up date

Was informed today that the only ECU that can have its software switch is
Part Number NNN 100 640.
Im in luck and Micks getting back to me tomorrow.
Get checking yours James. Its the one behind the side panel in the drivers side foot weal.
If not, think Mick can reprogram.

Will ask
kev

topsparks · Post by **topsparks** » Thu Aug 18, 2011 4:45 pm

I know where it is Kevin,its a pig to get to I bought a rolled Disco 2 for spares and removed it so I have 2 bites of the cherry! .Got to see if I can get it to run without cats as I run on LPG (Cat not needed for MOT) and the OEM manifolds run 2 pairs of lamda's,I have a nice pair of headers I can fit if I weld a pair of bosses on them for the lamdas.The car I stripped was a V reg and only had 1 pair.

kevcon · Post by **kevcon** » Thu Aug 18, 2011 8:39 pm

No news yet james.

Running a Zavoli multipoint LPG system on mine and have 2 pairs of Lamda sensors as well.
Regarding the cats, you only need to keep the fronts as the rears can be switch off by changing the country setting using a nanocom. But Im sure Mike with his box of tricks can do this.
Are you keeping the banana bunch inlet manifold?
If so have been informed the casting is poo and a clean up does wonders for flow.

Kev

topsparks · Post by **topsparks** » Sun Aug 21, 2011 10:28 am

Heres some of the bits so far
http://www.facebook.com/media/set/?set= ... 816&type=1

http://www.facebook.com/media/set/?set= ... 970&type=1

kevcon · Post by **kevcon** » Tue Aug 23, 2011 8:18 am

need to change your forum name to Mr Clean

still no news.
not to bothered at mo as on holiday in caravan.