Hmmm... impressive but possibly the worst side by side start in the history of side by side starts

 

But in favour of the m240i cos the m4 went first haha

 

Either way - another very compelling case for b58 cw jb4. Add an upgraded DP and the b58 will be able to respond quicker, sound better and no doubt give more within the infamous fuelling cap buried deep within DME.

Hope to see a similar demo of b58 TMC soon. Todate, TMC owners have posted lots of claimed numbers and stats but no real world proof yet........

 

Either way - another very compelling case for b58 cw jb4. Add an upgraded DP and the b58 will be able to respond quicker, sound better and no doubt give more within the infamous fuelling cap buried deep within DME.

Hope to see a similar demo of b58 TMC soon. Todate, TMC owners have posted lots of claimed numbers and stats but no real world proof yet........

BP - I don't own dashcams or any such equipment, nor do I wish to advertise the fact on video. Although I've not clamimed anything about the TMC as you know as some do. But take me on my word about it.

My M135 with TMC matched an M4 cabrio. The new M140 is quicker so I would expect much better results. My friend who owns a Tesla (the big very fast saloon one - minus special button) will vouch for the awesome speed. As will my mate who track races a year 2000 GT3. Add the BMW mechanic who drove it on Christmas Day, and the owner of the F Type 'S' who followed me into the garage to ask what on earth was under the bonnet. Lastly my car dealer mate who drives a C43. He couldn't believe how quick the car was and he has driven just about every Mercedes worth driving. I think we have all the endorsements we need and I have no reason to promote TMC. Far from it.

But it would be interesting to do a side by side with JB4. The car is so quick now although I do wonder if it was enough as standard. It borders now on being too much power, but it is rather fun....

 

I have a TMC m135i EWG automatic (no other mods) in the Durham area, more than happy to compare to another similarly specced jb4 car. I'm not going to pay for a rolling road though. I have bought it now, if it's not more powerful than before (pretty sure it is) then I would be heartbroken. If it does have more power then why pay money to confirm their stats.
A rolling start vs other plug in boxes however would be good to see...

 

My M135 with TMC matched an M4 cabrio.

The new M140 is quicker so I would expect much better results.

I think we have all the endorsements we need and I have no reason to promote TMC. Far from it.

But it would be interesting to do a side by side with JB4. The car is so quick now although I do wonder if it was enough as standard. It borders now on being too much power, but it is rather fun....

P70,

I'm fortunate to have sampled both m135i jb4 and m235i TMC so know n55 pros and cons of TMC v JB4, additive maps v absolute maps.

Like you, I've driven away from/around numerous m3, m4, 911's and v8 f types both on road and track days. Not scientific at all but ups the feel good factor without a doubt. Had numerous positive comments / expletives about how my car gets down the road, mainly from folk how have ridden in or driven it.

I'm glad that you feel b58 TMC is a step up from n55 TMC.

BP

 

My M135 with TMC matched an M4 cabrio.

The new M140 is quicker so I would expect much better results.

I think we have all the endorsements we need and I have no reason to promote TMC. Far from it.

But it would be interesting to do a side by side with JB4. The car is so quick now although I do wonder if it was enough as standard. It borders now on being too much power, but it is rather fun....

P70,

I'm fortunate to have sampled both m135i jb4 and m235i TMC so know n55 pros and cons of TMC v JB4, additive maps v absolute maps.

Like you, I've driven away from/around numerous m3, m4, 911's and v8 f types both on road and track days. Not scientific at all but ups the feel good factor without a doubt. Had numerous positive comments / expletives about how my car gets down the road, mainly from folk how have ridden in or driven it.

I'm glad that you feel b58 TMC is a step up from n55 TMC.

BP

BP - it is in terms of power and speed, and the car itself is a step up from the previous car. I prefer the adaptive suspension and a few of the other little touches. The 'but' for me, and I know it's not the best time of year in terms of road conditions, is it almost seems like too much power for the chassis. Hard to explain but it's like part of the car is trying to wriggle free of itself. Fine in corners but sometimes in a straight line it can catch you out a bit under full load. Never had that in the previous car, although it had less power of course.

I'd love to borrow a JB unit to compare but I assume the plug and play version used in the same way as the TMC, with no other add ons, would be pretty much the same anyway. As you and I have discussed before. But I'd like to try it.

 

P70

Currently b58 JB4 install is similar to TMC in terms of complexity but with added connection to canbus via routing a cable thru the bulkhead and mating upto OBD port. The latter is what differentiates jb4 from all other tuning boxes.

Jb4 map 1 should be equal to more or less to TMC i.e. additive boost upto 4.5 psi.

Jb4 map 2 is out (additive boost <6psi) but reading mixed reviews about it.

The fuelling cap in ECU and AFRs being leaner to start with, it may well be jb4 map 1 and TMC are about as far as tuning boxes can go safely. I've stated already elsewhere on here, I'd wouldn't be using tuning box on b58 without canbus monitoring / safeguards but that's only my view.

I spent sometime fettling my cars chassis before turning the wick up to ensure I could put more power down predictably, more of the time.

BP