BMW M140i: Dyno Runs (Stock vs JB+ vs Stage 1 tune) and goodbye JB+ 

cheers..

I thought about that too, but I noticed that the new B58 cars have a mechanically closed kidney grille (which opens as required) so I'm guessing the effect of the kidney grille should not be that great. But you might be right. It was a hot day, the guy had me drive him around 25 minutes in 38+ degrees C temp before the runs, and I later found some strange brown coolant in the intercooler expansion tank. Oh, and I started getting drivetrain fault due to the fuel after that too. I think it was a combination of the high temperatures, bad fuel and wrong coolant that probably meant the car was underperforming... Or I just have a lemon.. :) I need to take the car back for another test!

@@NoBrainerTalk sounds like you’ve certainly done a very thorough investigation into it and got it sorted. The end of the day the only correct dyno is your butt dyno and it looks to me that these draggy type boxes will take over from the traditional shop dyno in the future and judging by watching a few of your pulls you certainly don’t have no lemon there!

Steve, if you have 418 hp at the crank from Stage 1 and res delete only (at OAT 31 degrees C), then you my friend have a very good engine. Was this a custom tune or off the shelf tune? Here in Cyprus the octanes are 95 and 98 (I always use 98). There are reportedly a handful of petrol stations that may have 100 octane, but never seen one in person.

@@NoBrainerTalk It was a custom map, but to be fair, I always think they’re the tuners own map just thrown in. Doubt anything else gets done.

@@stevefarrimond you can see if its custom map that takes hours off testing and plenty dyno runs !!

If your engine is a B48 then, JB+ for B48 will work fine. If that's not your engine, install a tuning box for your engine.

@@NoBrainerTalk Yeah I have a N20 in mine since it's a 2015 320xi but tuning boxes are also a lot more expensive!

I think they are OK to add abit more power cheaply, at home, with minimum hassle. But yeah, for real gains you need proper mods.

@@NoBrainerTalk I just threw my money away buying those JB+ boxes

Negative, I did not. The 3pm setting is 4.0 PSI of extra boost, and turning it up to max would mean 4.5 PSI of extra boost. This means it had another 11% potential extra boost. EDIT: The reason I did not raise it to maximum is due to reading on forums that in real world conditions it performed best at the default setting, and would make the car response less than ideal at the max setting.

Hi Voll Care, looking at my photos I think 494Nm stock, 516Nm JB+, and 535Nm Stage 1

I also think the dyno was done correctly, but it's possible there is a chance of some engines being slightly better run-in (that might give some extra hp, who knows). I was also getting 5.1 seconds stock (never 4.6). I think it's not just the temperature but also the quality of the roads here in Cyprus (dusty, poor tarmac condition, not really flat). After stage 1 tune and the new tires it went down to 4.7. Haven't done any draggy times with xHP loaded, but it might go down further. But it's a lot of mods and effort to get down to 4.6 which should have been the stock 0-60 time...Anyway, perhaps on a mild winter's day, on the track, she might get below 4.6... who knows? :) An akrapovic downpipe and a stage 2 tune might be the turning point...

@@NoBrainerTalk In Cyprus, does your B58 come with the S858 option code?

@@keithw4920 Wow, what an interesting question! I don't think so because here in Cyprus we should have presumably "normal" fuel that is per EU standards, but then again, I don't know how to confirm besides asking the dealer.... It's not on the sales order, but such a thing would probably not be there.

@@NoBrainerTalk Here and in Australia we get 98 RON too but both markets get the S858.

@@keithw4920 Very very interesting! I guess I have to ask the dealer (as it would be a default option agreed between the dealer and the factory), I don't think it will be stated in my documents... will check!

Hi, JB+ is a tuning box. There's no JB Stage 1 (or JB1) for the B58, the next tuning box available after JB+ is a JB4. A Stage 1 tune does not use a tuning box, but is the process of loading a custom engine map to the ECU, which requires zero or minimal engine modifications (by comparison a stage 2 tune requires at least a downpipe replacement). Hope I understood your question correctly. :)

I think neither of that is true. :) But thank you for the feedback.

NoBrainer Talk you can literally see the dyno numbers on BMS website. B58s making well over 300 at the wheels stock. I’d imagine it’s the dyno cause you’re car shouldn’t be making only 260.

@@lamakicker69 it sounds like he was on a mustang dyno. Those are more precise imo and will always give lower figures