BlackrazorNZ

Exhaust pops on overrun

Oh I 100% agree, im just a bit of an engineering nerd. Reality is most high performance cars these days are wasting most of their potential off-track. I guess there’s also an element of ‘I don’t need it but it’s nice to know it’s there if ever do’

With the B58 having been out for a couple of years now in the M140i, M240i, M340i and a couple of others, there are some really interesting tweaks starting to come out of the woodwork. The base engine is rated 250kw / 335hp, with 500Nm of torque, figures which are somewhat underrated as the car normally dyno's about 365hp and appx 516Nm torque. It's quite apparent that BMW have built this engine to be a platform from which to develop some pretty incredible performance options out there. With only some relatively minor tweaks you can get some pretty mental output figures on completely stock internals. For example, here is a 2017 M140i with some improvement to the exhaust system, intake filters, and the addition of one of the newer Burger JB4 on-the-fly remappers, admittedly on the highest setting that won't require an upgraded fuel injection system or water/meth injection. That's 430hp and an astronomical 685Nm of torque... from an engine in a hatchback that you would barely look twice at when you saw someone loading groceries into it at the supermarket! Gonna be bloody interesting what happens with this engine in coming years, especially ones the tuning-happy scene that the Supra will attract start getting their hands on it.

That purple interior 928 GTS made my heart sing ?

Can't a guy talk about getting his sausage smoked, pulling his pork, his plan to rub some butts or making the most of his long, hard cook over the weekend, without someone's mind immediately going to the gutter ?

The new Toyota Supra. But in all seriousness, I'd be perfectly happy with my incoming car, once I make a few necessary tweaks (MPE and LSD).

Got a big cook this weekend, I’ll compensate with some meat pics for you once done

For some weird reason I hate talking to vendors until I already know exactly what I want to do.

Does anyone know if any of the service departments at NZ BMW dealerships will fit a BMW LSD that was not purchased from them, and if not, will fitting one via a credible aftermarket service agent void any warranties? I'm talking specifically about the actual factory BMW Drexler LSD, not an aftermarket option like Quaife or Wavetrac.

You mean like this one? https://forums.watchuseek.com/f29/fs-charity-sale-blue-spark-jdm-scvs013-seiko-6r15-one-owner-4871559.html

Yeh I do prefer the bullet proofness (is that a word?) of the mechanical option, but it seems like E-diffs are here to stay - the i30N has one, the new Polo and Golf GTI has one, and I’m sure more to come.

It's a curse. A fun curse. But still a curse. I could have bought an M2 Comp with cash with what I've wasted on this hobby in the last 7 years...

Apologies, I was not trying to infer you were I'll quote direct from the press release docs for the Senna (http://media.mclarenautomotive.com/press-kits/mclaren-senna) "Complementing ESC and VDC is Brake Steer, a technology McLaren developed for Formula 1™ that was ultimately banned from the sport due to the performance advantage it offered over rivals. This race-bred technology imperceptibly brakes the inside rear wheel to enhance turn-in and reduce understeer, encouraging the driver to apply the throttle earlier. This significantly enhances the agility of the McLaren Senna and removes the requirement for a traditional limited-slip differential, saving weight and reducing component complexity." A whole lot of marketing waffle, but the last line (and other relevant info online) confirms that, as with the P-1, the Senna uses a brake-controlled E-Diff system where mechanically the diff is fully Open. I guess in their case, the traction benefit of a mechanical LSD was outweighed by the performance loss the extra weight added. I guess when you've got over 1000hp per tonne, every kilo matters!

Well, I got my answer. See table below. Prices are in NZD excl GST and fitting. For comparison, US prices direct from BMW and converted to NZD but excl import duty and GST, are: M Performance Exhaust - $1627 M LSD - $3752 Even budgeting $1000 for freight it's still not within a million miles. I'd probably take a punt and pay the extra $500 (less freight) for local supply of the MPE, but the LSD is just off the hook.

Would certainly seem logical, but all the debates I’ve seen about E-LSD and mechanical LSD, I’ve never been able to get a straight answer from those who are anti E-LSD as to why cars like the McLaren P1, 650S, and now the Senna, all of which are essentially built as a no compromise hypercars, use E-LSD’s by choice over Torsen or clutch type mechanical LSD’s. I don’t think the argument is as simple as either side would like it to be.

Indeed. ELSD's seem to work as good (and in some cases even better) the mechanical LSD's a lot of the time, but they have 2 big flaws: - They're great until the point they can't cope and let go, and then they REALLY let go. - If you get a wheel airborne over a chicane or whatever, the ELSD can sense the suddenly airborne wheel as 'slipping' and so apply a brake - which can have interesting consequences when the wheel lands again at speed! My understanding (limited as it is) is that a true mechanical LSD like the BMW Drexler model will ensure appropriate diff lock well before the point where the E-LSD sensor would start to apply brake force, so essentially once you fit a true LSD the ELSD doesn't kick in much or at all. I do know for a fact that fitting the BMW LSD does not require a recode for ELSD equipped cars.

It's an interesting topic really. I think a lot of the discussion comes from the fact that people are still discussing in terms of Open and Limited Slip Differentials, when the reality is somewhat more complicated. The modern cars use an Electronic LSD which is essentially an Open diff with torque vectoring via brake application. Which all sounds a bit jiggery-pokery and people poo-hoo it, but it's good enough to form a large part of the basis of the X-Drive system. Even some (nominally) Limited Slip differentials are actually fancy Open diffs with internal braking, e.g. Quaife etc. Really interesting article, if you're into facts and figures, on the matter here : https://www.1addicts.com/forums/showthread.php?t=719012 In short, the view for a lot of the modern RWD performance BMW's with an E-LSD seems to be, 'If you track it or drive at 9+/10 regularly, fork out for an LSD - if you don't, you'll be fine'. There's also the very valid argument that goes, if the M240i came with an LSD, what compelling reason would there be to cough up for an M2? It'd be 95% of the car at 80% of the cost.

P.S. Don't suppose you were driving through the back of Mt Eden approximately 1pm yesterday? Was driving behind a white M135i.

That's astonishing. What on earth could be the justification for charging double what a private individual can land it for, as a single part, paying all relevant taxes and duties, and buying from BMW directly overseas? It's not like you're comparing it with a grey market dealer, it's literally the BMW Shop!

Hi there, Does anyone know if there is an NZ equivalent of the USA BMW Shop (https://www.shopbmwusa.com/HOME) where you can actually see the list prices of M Performance parts? For example, the USA prices for the BMW (Drexler) LSD and the M Performance Exhaust that fits the M140i are as per below, but I've not been able to get a clear answer for NZ prices, with one quote being $8k+ for the LSD fitted and $4.5k+ for the exhaust fitted, both of which seem asinine.

Thanks for all the feedback folks. I've pretty much decided best course of action is to just look after the factory paintwork to a reasonable degree during the lease period, and then if I decide to pay the balloon and keep it (in 3 years or so), i'll just get a full wrap in colour of my choice then. Will only cost about the same as fixing it all up from new, and will give me the option of a new colour to breath some fresh life into the ownership experience at least

Can’t really comment on the gas bit, but you won’t need a rib rack for short ribs, they’re a pile larger than pork ribs so just elevate them on a wire cake rack or the like. The challenge will be keeping the temperature low and consistent enough for long enough and/or getting smoke over a long period.

Honestly, a $250 Weber Premium from the likes of Container Door will cook just as well and is better to learn on as it forces you to learn temperature control, the benefits of a water pan, snake and minion methods, etc. Eggs are brilliant (I’ve owned 2 BGE’s and a Kamado Joe) but they are so controlled that you can actually be a bit lazy. Think about it this way - jumping straight to an Egg is like learning to drive in an automatic instead of a manual. Sure, it gets the job done, but you’re stuffed if you ever have to use something without it.

I have a mate in Hamilton who would gnaw your arm off for those

Both recently sold sorry bud. Down to the Rolex GMT, the RL, the IWC Portuguiser and the Monta at the mo - rest all recently sold to make way for something big Mate, that's the cool thing about watch collecting, it's like this group - doesn't matter whether you've got a brand new solid gold Rolex or a $50 Seiko 5, what matters is that you're having fun It's like with anything, the more you get into a hobby the more expensive it gets, and watches are the worst. You start thinking spending $2000 on a watch is an 'impulse buy' and $5000 is 'affordable' - don't go down the rabbit hole!