Thread: D4 rims and second battery

I had a bit of a look today and think using the old D3 spot could be possible without any extension harnesses. The battery would need to be removed to access the brake m/c or the modules in their new positions.

1. The alarm horn can be remounted under the brake line bracket, discarding the oversized main bracket.
2. I think the larger module (transmission module?) could be moved to under the brake lines between the m/c and the mudguard. The brake lines from the abs modulator would need lifting a little.
3. The glow plug control box is only small and I think will mount under the brake lines close to the modulator in place of the horn bracket. Its bracket would be discarded.
4. My brake lines to the ABS modulator would need to be rotated up a little to clear the battery area.
5. My 80ah agm looks to just fit under the cover - about 8.5" clearance.

I haven't unbolted the larger module to see what's below it, but the base is plastic at the front. I have to wonder what LR might think of moving the modules although they would still be within the enclosure.

Edit: The base is flexible plastic not steel and I doubt there are any battery anchor points.

IF LR had thought when they first decided to find somewhere for the modules.

Gordon,

Following is my question to Compomotive Wheels and their response, although I'm not convinced that they have actually tried the rims.

Do you know if the PD1880 rim wil fit the Land Rover Discovery 4
with its larger brakes & callipers?

We can manufacture our PD1880 to suit your car & we do manufacture the 8x18
PD1880 for Bowler for fitment to their Nemesis however unfortunately at this
time we do not have any spare castings. We are currently waiting for
Bowler to order some further wheels & when they do we will have spare
castings.

If Bowler have determined that they fit then it must be time to order some, although I understood that Bowler were going to get back to you when they got to try one so I assume they haven't tried yet. Perhaps Bowler haven't ordered any because they have tried and don't fit.

Graeme,

Already been down that road with Compomotive. I got a similar response until I actually tried to order some. They _cannot_ supply. You have to go through Bowler, as they're apparently made under licence.

I email Bowler at least once a week (generally making a pest of myself), but they have been busy (understandably) with the Dakar earlier this month. My last reply email was yesterday, and essentially they still haven't tried with the 3.0 ltr, only the Supercharged. They will contact me once they've tried.

I still have only 8 interested parties for the GMAX custom rim, which is not enough to place an order. We need a minimum of 15 sets. Obviously there are not that many people that see the 19" rim limit as enough of a hindrance to warrant spending extra money on 18" rims. Still, I'm seeing Land Rover Australia in two weeks, so I'll see if there's anything they can offer.

The Dynamic rim will be at prototype stage in a couple of weeks too, I'm going over there and will measure it up to confirm whether it will fit or not.

In the meantime ..... for D4 owners (won't work with the RRS unfortunately), try oversized tyres on the 19" or 20" rims.

20" : The ProComp Xtreme AT is made in 275/55/20 (31.9" diameter, similar to the popular 265/70/17 that D3 owners use), and gives you ~ 6" of sidewall. This is comparable to sidewalls on a 255/60/18 (and will actually increase low-pressure footprint slightly due to the 20" having a lower radius-of-curvature). You can also fit the SecondAir 20" internal beadlocks to ensure safe running at pressures down to 6psi.

19" : No real At's in oversize, but the Pirelli Scorpion Zero and Michelin Diamantis come in 275/55/19 (so also provide a 6" sidewall) for touring and light ungraded road work. No internal beadlocks available in 19", although I'm still investigating this.

Cheers,

Gordon

Originally Posted by gghaggis

Still, I'm seeing Land Rover Australia in two weeks, so I'll see if there's anything they can offer.

Just dreaming I'm sure but it would be a good start if LR were to offer/allow D3 V8 brakes to be retrofitted.

Thanks for the update.

Actually, as well as asking them about co-ordering with GMAX, I want to know what the effect of shaving the brake callipers would be - I've got a 'friendly' in LRA whose up on the technology.

If they're more for aesthetics than balance/heat transfer (and in all honesty I can't see them being particularly good at heat dissipation), then removing 5mm would allow the std GMAX Bonafide 18" rims to fit. I'm willing to use mine as the guinea pig. imagine there will be the same old caveats regarding warranty, but I'm fairly used to fighting them on that

Cheers,

Gordon

I was thinking its about time I tried to find a damaged D3 18" rim to grind depressions to find out by how much and exactly where the calipers would need to be reduced, as it was hard to get a good estimate when doing a quick test to see if they fitted or not. Remember that the D3 18" don't fit the rear either.

For rims that use external clip-on weights rather than the internal stick-on ones, the clearance doesn't have to be as much.

The existing GMAX 18" rim has greater internal clearance than the D3 rim, so I imagine you'd have to do more than just grind down the calliper casing. More like retro-fit the V8 callipers .........

Cheers,

Gordon