[B58togo]

That’s pretty stout for stock! Get a stage 2 e30 flash and go catless and you’ll probably run 11.30’s @ 120 all day long.

[mfurse]

Lol - detuning and robbing people of 50bhp. You don't reckon people would spot that? On a dyno? Was it over powered out of factory by 50 bhp?

[10"]

The car did it...not the driver. Hence the problem with modern cars. It's all computer glory really....not rewarding for the actual driver.

[xlover]

Originally Posted by Giggler

I’m not convinced it’s BS, but I would argue people ignore how much transmission gearing and torque output can impact acceleration. I think both of these are a bigger factor than given credit for. A lot of the time, when I want to drive somewhat aggressively, I stick to the midrange because I don’t see a huge difference compared to full throttle peak horsepower.

Anyone tested the RWD yet? There’s a ~150lbs weight advantage so could see higher trap speeds?

If the detune is a real thing or at least a credible rumor it probably needs its own thread so data points can be collected. I have seen it referenced a few times but no data behind it.

[xlover]

Originally Posted by bimmer456

I thought that was only in Europe. How is the suspension on x drive and is it higher ride height? This was an issue with F30 xdrive.

G20 3 like the G30 5 introduced before it, xdrive/RWD selection has no impact on ride height or suspension choice.

[Liquid_Ice]

Originally Posted by mfurse

Lol - detuning and robbing people of 50bhp. You don't reckon people would spot that? On a dyno? Was it over powered out of factory by 50 bhp?

People talking about the detuning aren't just making it up...

According to Mission Performance, early M340i's had a "bug" in the DME and the car was making more horsepower than it should - to the tune of 400whp. In June, they released an update that lowered the car down to 346whp and in July they released another update that lowered the car down to 338whp. There was a recall on early M340i's for a fix for emissions which some are speculating is the re-flash that lowers the car back to the ~338whp.

Mission Performance has dynos to show the power loss from June to July DME's but not their claimed 400whp early versions: https://g20.bimmerpost.com/forums/sh....php?t=1638852

However there are a number of dynos for early Supras where the car was making ~360whp and underrated and MP claims the updated Supras make less horsepower too (and there are dynos showing the Supras making ~330whp) - so there's at least a little bit of evidence to show that there may have been some detuning going on. There are so many variables when it comes to dyno numbers (the type of dyno, the weather, the parameters the operator is using to plot the graph, etc) - so going from 360whp to 330whp could simply be down to DynaPack versus DynaJet dynos.

For example, Evolution Racewerks also dyno'd an M340i recently at 391whp / 421 lb-ft on a DynaPack. ( https://g20.bimmerpost.com/forums/sh....php?t=1655627 ) - I don't know whether that is a Pre-June flash M340i, a DynaPack that simply reads really high - or what. They say it is an early model, the first that Irvine BMW got, so maybe it is one of the 400whp versions? I dunno, Evolution Racewerks did say they were sent a letter for a recall but haven't applied it yet...

Whether or not 400whp was ever really a thing on the M340i's, who knows - it could be MP trying to sell tunes I guess.

No matter what though, a 12.08 1/4 mile is really impressive - especially on the runflats. I'm thinking the car could easily be in the high 11's with the Pilot Sport 4's?

[spool twice]

The M340i is impressive out of the box in acceleration, very cool!

[rjd598]

Originally Posted by jmg

Oh it's the guy who hates F30's because he has the mights 528i, spreading the love to the G20's as well. You're a special dude.

[uniqueMR]

[tommytexter]

Can it break 12s if it is on ps4s tires??

[bimmer456]

Originally Posted by xlover

G20 3 like the G30 5 introduced before it, xdrive/RWD selection has no impact on ride height or suspension choice.

Good thing no more floaty suspension just because it's x drive. BMW listening to their customers for a change. How about turn radius is it the same as RWD?

[Who's on first]

I'll take ours up to the track this Friday evening. Bone stock, AWD, shitty Bridgestone no-seasons.

My local track is one of the quickest in the country... has been for decades.
(Cecil County Dragway, in MD)


My stock F90 ran .3 quicker then others that were posted.

Then she ran a 10.52 @ 132mph with ........Michelin AS3+ (all-seasons), just with Race Chip.

[Transfer]

Originally Posted by Liquid_Ice

People talking about the detuning aren't just making it up...

According to Mission Performance, early M340i's had a "bug" in the DME and the car was making more horsepower than it should - to the tune of 400whp. In June, they released an update that lowered the car down to 346whp and in July they released another update that lowered the car down to 338whp. There was a recall on early M340i's for a fix for emissions which some are speculating is the re-flash that lowers the car back to the ~338whp.

Mission Performance has dynos to show the power loss from June to July DME's but not their claimed 400whp early versions: https://g20.bimmerpost.com/forums/sh....php?t=1638852

However there are a number of dynos for early Supras where the car was making ~360whp and underrated and MP claims the updated Supras make less horsepower too (and there are dynos showing the Supras making ~330whp) - so there's at least a little bit of evidence to show that there may have been some detuning going on. There are so many variables when it comes to dyno numbers (the type of dyno, the weather, the parameters the operator is using to plot the graph, etc) - so going from 360whp to 330whp could simply be down to DynaPack versus DynaJet dynos.

For example, Evolution Racewerks also dyno'd an M340i recently at 391whp / 421 lb-ft on a DynaPack. ( https://g20.bimmerpost.com/forums/sh....php?t=1655627 ) - I don't know whether that is a Pre-June flash M340i, a DynaPack that simply reads really high - or what. They say it is an early model, the first that Irvine BMW got, so maybe it is one of the 400whp versions? I dunno, Evolution Racewerks did say they were sent a letter for a recall but haven't applied it yet...

Whether or not 400whp was ever really a thing on the M340i's, who knows - it could be MP trying to sell tunes I guess.

No matter what though, a 12.08 1/4 mile is really impressive - especially on the runflats. I'm thinking the car could easily be in the high 11's with the Pilot Sport 4's?

Don't be silly. DynaPak is the highest reading dyno and you just simply can't compare dyno to dyno. Unless it's a delta between cars on the same dyno and really the same day, the numbers are not reliable measure.

Mission Performance has done nothing to prove their claim but will be happy to sell you a tune for your supposedly BMW detuned car. These cars are very fast and this nonsense is unproven and irrelevant.

:bs:

[outofphase]

Awesome time, congrats! The B58 is really turning out to be a motor with incredible potential. I competed at the 11.5 index at Import Face Off last week and ran into Boostin’ performance’s A90 Supra. Only had a downpipe and tune, was disqualified because it ran 11.0 in qualifying and then 11.2 in the first round

Not jealous at all! I put at least $7k in parts and tuning (not including labor) into my N55 F30 and barely manage to hit 11.8, and here you go and run a 12.0 BONE stock! I have big plans coming up for this car and have been debating getting a closed deck N55 block but now I’m seriously considering returning to stock, selling, and starting fresh with a B58 car. I’ll lose money but it might be cheaper for a similar (if not better) result than the closed deck...

Regardless, I know these cars, and while people like to talk about how “the computer does everything for you”, you just don’t achieve a run like that without NAILING the launch, so I applaud the hell outta you for achieving that time!

[Liquid_Ice]

Originally Posted by Transfer

Don't be silly. DynaPak is the highest reading dyno and you just simply can't compare dyno to dyno. Unless it's a delta between cars on the same dyno and really the same day, the numbers are not reliable measure.

Mission Performance has done nothing to prove their claim but will be happy to sell you a tune for your supposedly BMW detuned car. These cars are very fast and this nonsense is unproven and irrelevant.

:bs:

I'm not confirming their claims - I'm just saying when people are stating they think the newer M340i's have less horsepower, they're not making it up - they got the info from the Mission Performance posts.

I know DynaPack dynos tend to read higher (although +53hp sounds like a lot it is really only ~15% difference) - and like I said in my previous post, there are so many different variables that go into a dyno reading that you can't simply compare one to the other unless they were back to back dynos on the same dyno, same day.

For me - I don't think you can definitively say it is BS or not until we can find an M340i early build w/o the recall and one newer build and dyno them back to back on the same dyno.

The thing is, what does Mission Performance have to gain by saying the car got detuned? For people with early builds, they just won't get the recall and won't buy the Mission Performance tune. For anyone with a newer build - I guess maybe hearing that someone else has more horsepower may drive them to buy the MP tune, but wouldn't just hearing that you can gain +50hp from a Stage 1 tune do the same?

The M340i is not a volume seller that they're going to sell boatloads of these tunes for either - if you were going to make up a story - why wouldn't you choose a tune for a higher volume seller? Again I'm not saying its true or false, I'm just trying to figure it out.

[Fugly M3]

Looks good. G80/2 should be insane. Though it may not be as attractive!

[The Nerd]

Originally Posted by Transfer

Don't be silly. DynaPak is the highest reading dyno and you just simply can't compare dyno to dyno. Unless it's a delta between cars on the same dyno and really the same day, the numbers are not reliable measure.

Mission Performance has done nothing to prove their claim but will be happy to sell you a tune for your supposedly BMW detuned car. These cars are very fast and this nonsense is unproven and irrelevant.

:bs:

Mission Performance surely did the dyno testing on the same machine (and same m340i) and yielded a considerable difference after the car was updated. Did you read their post (link was provided)? Do you think they made it up?

I agree that Mission Performance showing that original dyno with the higher HP reading would clear all of this doubt....but until then, I guess I'm choosing to believe that they weren't making it all up.

Why would BMW do an update and reduce power? Maybe they realized the added power on every m340 being released would put too much stress on the engine and tranny to align with their computed warranty coverages/projections? Maybe they chose to save the extra power for a future MPPK offering?

[Bumpinjeep]

Wonder what the G80 X-drive will put down? Low 11s?

[StealthFish]

Originally Posted by ls3c6

Yea 93 from Sam's, did nothing but drive there, seeing 11psi on sport gauges.

It feels quicker than my jb4 f30 did

Hold up! The 340i G20 has a boost gauge finally!? Wow

[Who's on first]

Originally Posted by StealthFish

Hold up! The 340i G20 has a boost gauge finally!? Wow

It's in the iDrive, not a physical gauge. BMW's have had them for years, on some cars.

[No Boost]

Originally Posted by 535i MSport

Isn't there a better yard stick for normal driving...?

I don't get the obsession with ss 1/4 mile.

The 113 mph trap speed is a good indicator of how fast this car is. It's comparable to a Mustang GT/OG M2/E9x M3...in a straight line of course. The 335i trapped around 105 which is a considerable difference.

[CLABRO]

Very impressive! That 60' time could be improved with better tires no doubt which in turn will lower the 1/4 mile time. However, that MPH seems a little low for a 12.08 second 1/4 mile. Possibly wasn't pulling nearly as hard the last 25% or so.

Regardless, this is a great time and thanks for sharing!