FOR SALE Z4M Coupe - Imola Red, Rod bearing, Vanos, 4.1 diff

[ferniefan]

Hi Ed,
It definitely has a 4.1 ratio diff I know this for a fact as described in the advert. Atomic was asking if I knew if it was a new diff or the original diff but rebuilt, to which I cannot be 100% however the invoice would suggest its the original but rebuilt and fitted with the 4.1 ratio.

Apologies if that wasn't clear.

I also agree regarding the difference. I've driven my friends standard Z4M and mine is on a different level with regard to acceleration, it transforms the car...much more responsive and it suits the cars character much better

I don't know for sure on the diff, as it was before my ownership. Although the invoice states rebuild and supply of the 4:1 ratio crown wheel and pinion so I've always assumed its the original but rebuilt (new seals etc) diff.

The below table is a speed comparison between standard final drive and 4.1 final drive in each gear at 8,000 rpm for the E46 M3.

I'm reliably informed (thanks Tom_K!) the E46 M3 gear ratios are ever so slightly different to the Z4M ratios, but for arguments sake you should know fairly conclusively in 3rd gear if you have a shortened final drive

MPH speed at 8,000 rpm.
3.62 ratio 4.10 ratio
1st 40 36
2nd 68 60
3rd 102 90
4th 139 123
5th 171 151
6th 206 182

FWIW I consider the 4.1 to be one of the best mods I've done to my car. It makes it so much more involving on the road because you're stirring the box more, and the in-gear torque increase makes it feel a chunk peppier too. On track I find it great as well; miles better punch coming out of corners, avoids any real need for that awkward shift into 2nd, and 5th is actually a useful gear with a 4.1!

Only mentioning this because if you can confirm conclusively that you have the 4.1 it's (imo) a decent selling point for the car.

GLWTS

[Ed Doe]

My bad apologies for my misunderstanding!

[Atomic]

It's definitely 4:1 and thanks to Ed I now know there's another mod I didn't know I needed!

224Ms need a spacer to clear the Brembos.

In my experience of the Porsche Brembo caliper conversion, it needs a min of 10mm (I think I went for 12mm for a bit more clearance) to safely fit under 224M fronts.

I'll use the search function but I'm assuming if you run spacers on the front then it's best to run them at the rear too? No issues with 10-12mm all round? I'd be unlikely to lower the ride height.

Thanks

[Ed Doe]

It's definitely 4:1 and thanks to Ed I now know there's another mod I didn't know I needed!

Sorrynotsorry

[Mr Tidy]

My ideal MC colour combo - if only it had a lower mileage.

GLWTS.

Didnt think mileage was an issue for you. If you bought a low mileage one you would spend the same money getting bits done like rod bearings at 25k

It isn't but there isn't much point getting a 98,600 mile car to replace a 95,600 miler just for a different colour combo, especially with a couple more cosmetic issues than mine.

I appreciate it has some great track oriented goodies but I don't need them on a road car. No way do I need lower gearing for UK roads, my issue getting out of corners quickly is traction not lack of grunt!

Apologies to the OP for getting a bit off-track - it's a great car that just needs to find the right owner.

[mmm-five]

I'll use the search function but I'm assuming if you run spacers on the front then it's best to run them at the rear too? No issues with 10-12mm all round? I'd be unlikely to lower the ride height.

Thanks

I didn’t, but that was because the rear wheels didn’t need extra clearance, and I had already fitted slightly wider rear tyres & coil overs, so didn’t want to risk fouling the outer arch.

[Hysteric]

cracking example of a car with massive smile per mile value - what a bargain i reckon.

GLWTS.

[RyanB88]

Stunning looking M with all the right mods done to it. Big fan of this

[ferniefan]

Thanks guys, some really positive comments. Although it just makes me wonder why I'm selling it

[Ed Doe]

Thanks guys, some really positive comments. Although it just makes me wonder why I'm selling it

I mean I'm sat here wondering too if it helps keep it, sort the paint for a few hundred quid and enjoy it

[plenty]

Given the diff, the actual miles this car has covered will be lower than the odometer reading. 883 actual miles for each 1k on the clock since the diff was fitted.

[ferniefan]

Given the diff, the actual miles this car has covered will be lower than the odometer reading. 883 actual miles for each 1k on the clock since the diff was fitted.

Hadn't even considered that it might effect things, it would be minimal though. It was fitted around 87k miles so its done around 10k miles with the diff fitted. So you could say its on 95k ish

[ferniefan]

Thanks guys, some really positive comments. Although it just makes me wonder why I'm selling it

I mean I'm sat here wondering too if it helps keep it, sort the paint for a few hundred quid and enjoy it

Honestly, I've been up and down on this for weeks now.

Honest reasons are, I love the car but I lost my dad this year and I just fancy trying something else, and I think with everything that's happened for me this year its made me want to try more cars and have the things I want. Life's too short etc.
I'll probably regret letting it go but I think we can all have sellers remorse on cars like this. I had an E46 M3 and wished I'd never sold that, which lead me to the Z4M.