Tuning your BMW B58 Complete Beginners Guide (340i, M340i, Supra etc)

[@raphaelperez2478]

Could I compensate not having a bigger fuel pump by adding port injection? Could a TU + PI + LPFP. Be good enough for a pure 800?

[@Metoy3r]

Great question! Yes you could compensate by running port injection paired with a TU pump for example. Although port injection is only activated when the engine needs more fuel whereas a fuel pump has a constant flow of fuel. But nonetheless, yea you could do it that way!

[@trjahson]

This was a very good straight forward breakdown of the different tune levels. I'm about to d a stage 1 Mhd to begin with in my x5 xdrive 40i m sport and then who knows, potential with this engine is unreal.

[@avrajuppal1691]

Lmk how it went I’m planning on doing same thing

[@isaiah9776]

Did you have to get your dme unlocked for a stage 1?

[@marioalvarez7518]

Very informative video, I have a B58 (1st gen) on a 740i. I am new to the BMW community. I have found very little on the 740s, but I am glad the engine is in several vehicles to get the information necessary to do the modifications. Thanks for the information.

[@brightboakye3996]

How long have you had the 740i and reliable has it been for you so far?

[@yermommy777]

I know the b58 is underrated in terms of crank hp vs whp but in no case is an engine rated at 320hp crank going to make 300hp at the wheels. I get that bmw typically rates their engines pretty close to whp (don’t get me started on “Porsche hp” since they typically underrate by close to 20%) but that estimate is extremely bad. You typically get 10-15% drivetrain loss when you measure at the wheels. I have an x3 m40i and can say for sure that the 382hp rating is bullshit and it feels much closer to 410-430hp crank.

[@lukeskywalker1666]

I got MHD stage 2 with tu high pressure fuel pump downpipe and xhp gearbox mapped 140i (485 bhp) on the dyno

[@TCraig00]

Yeah my 18 X3 M40i feels like well above the 382hp rating 😂. I wonder what's these 340i are actually at

[@evanf30]

Crank doesn’t take account of the turbo I don’t think

[@SlowRacer729]

Coming out of the racing world, the first thing we would upgrade is our brakes. As a minimum, you need to upgrade your brake fluid to one with a high temperature rating like ATE Racing Blue. Consider upgraded brake pads, as well. It’s great to go fast, but it’s more important to be able to stop.

[@B58340i]

I've just had a injector stuck open on mine and it cracked a piston. Luckily no damage to the block.

[@the_batmobile0.4]

Bro how is happening to yall man, I'm tuned and beat the living shyt outta this car and doing tons of drag racing and my car is still running fine after 3 years of very harsh driving, you can find my racing on samcarlegion youtube channel.

[@B58340i]

@Zeus Lightning I've been stage 2+ for around 20k miles with alot of hard driving never a issue then I was cruising at 30mph and boom drivetrain fault with massive misfire

[@the_batmobile0.4]

​@B58 how much mileage in total?

[@B58340i]

@@the_batmobile0.4 just under 50k

[@brentyee5914]

@@B58340i pump gas? E85?

[@E34boyz]

Very good knowledge about the video. I am thinking about getting bmw 340i soon

[@the_batmobile0.4]

Driveshaft is more of rwd thing but could definitely happen to xdrive too on good hook launch

[@Metoy3r]

Thank you for the info!

[@DAngeloGarvin]

Really? I thought being that the xdrive hooks better the driveshaft is more liable break.

[@walt_13]

Bro, the info in this video is appreciated. Thanks for the content bro you got yourself a sub

[@Metoy3r]

I really appreciate that bro

[@walt_13]

@Metoy3r I would like to get some advice on parts and Installs.

[@Metoy3r]

@waltersamuels4543 sure, what’s up

[@walt_13]

@Metoy3r when you did the Pure Turbo upgrade (as I'm planning on sping the same) did you do any other supporting mods?

[@chrisn1689]

glad i watched this video, i just bought a used one and everyone wants me to tune it so bad lol. but i wanted to do regular maintenance first to see how it runs. everything is good its been fine drives good, changed all fluids havent changed sparks yet. But now im running into a little of a rough idle, sometimes rpms drop slight and jump up like a misfire almost. any ideas ? other than spark and coil

[@chrisn1689]

also plugged it up to a computer, no codes ,no check engine, no deleted codes. Going to do coil and spark just because but if that isnt it im thinking a, air fuel issue

[@MoneyManMike440]

Sounds like a need to replace a fuel tank valve. Its been a while but i had the same symptoms at idle sometimes the car would even cut off

[@calvinwaltersjr5508]

@@chrisn1689update???

[@Reaper_f30]

B48, stage 1 ots 93 bm3, xhpflashtool stage 2 Charge pipe Mst intake Catless dp Dyno results 275bhp, 260nm torque

[@randomperson8991]

Thats damn good off that 4cyl

[@hoonigan_sam_2390]

wat about the transmission sir?? do i need like xhp transmission flash on stock trans or upgrade to stage 1 or 2 for 600+ hp? plz lmkk

[@timestamps8576]

Fantastic Video exactly what I was looking for

[@marwansherin]

thanks for the info, I have a questions, so stage 1 and possibly stage 2 do not necessarily require transmission tune?

[@Metoy3r]

Correct, neither require a transmission tune but getting one will definitely makes those shifts that much faster

[@marwansherin]

@@Metoy3r awesome, I'm really considering still in the research phase, your video really helps!

[@hassaanghani881]

Great video bro keep it up 👍

[@Metoy3r]

Thank you !

[@paulLeo6569]

14:31 Great mod coverage. Thanks. Did you tune the transmission as well? Any thoughts on differential? Seems a few are staying with standard rear drive Stage 1/2?

[@isaiah9776]

Do you have to get your dme unlocked on gen 2 b58 engines for stage 1 tune

[@edrixb58]

How many revisions did it take to complete the custom tune by Sameh? And how long did it take to get each rivision?

[@marvinzhang3734]

remember to upgrade the cooling systems as well

[@darrinyo-mamakimble7002]

Good video good presentation, good humour keep it up

[@TCraig00]

320 crank does not equate to 300 at the wheel but these BMW engines seem about 10% underrated

[@Tachyon836]

Ill be real, mhd stage 2 on 93 with xhp stage 2, cars is awesome this way. I could go further but this feels just fine tbh

[@kCoss234]

So instead of starting with the tu hpfp can you just jump straight to the stage 2 dorch

[@TravisNeedham]

What about the transmission? tunes reliability? i understand the video is about the b58.

[@juliusoh]

Any tune will require unlock which will require sendinf to femto right ?

[@TheM3athome]

I have a 2020 m340i and I saw something about having to send my ecu to Finland.. do I gotta do all that for a stage 1 bm3 tune???

[@nathangarcia5097]

Do bmws 340is tune their transmission ? Like VW and Audis do ?? I’m from their platform new to BMW

[@gunnarpolk-in1cw]

how would i go about upgrading my driveshaft? also what are you opinions on meth injection because e85 is not available where i am. thanks

[@TehNiCoLaS]

how important would it be to get the xhp transmission flash/ and or is it nessecary?

[@Metoy3r]

I wouldn’t say important or needed but if you’re trying to lower 0-60 times or even 1/4 mile times it helps tremendously

[@kevin-jm3qb]

Anything above 600wtq you need a trans rebuild or limit it with xhp

[@ItsJustMeMcKee]

You know them B58 engines are great motors Toyota to use them.

[@chenshuoyan2456]

I find out that after I upgrade my gen 1 HPFP to TU fuel pump, the idle speed has been reduced from around 1100 to 700RPM.😢 Did this happened to you as well?

[@Metoy3r]

No that’s weird, I didn’t run into that problem

[@shabploffies]

Did you end up figuring out the issue?

[@arnasms]

Doesn’t 1000+ rpm at idle indicate a problem with the spark plugs or fuel pump?

[@AntonioMulholland-n4v]

Genuine question once you add the turbo and everything your spending around the ammount of a used f80 do you just the the 340is look more?

[@Metoy3r]

Upgraded turbo 340i is faster than FBO F80

[@beyondroutinefitness-reach9906]

Hey, I got a G20 2020 M340i.... My stock run came out to 391 WHP and 407T. STOCK... I don't know how that's possible.

[@zekekilbourne]

BMW usually under rates their engines in terms of horsepower. That's probably why it came out like that. If I were you, I would start modding it and get to experience the full power and opportunities that the b-58 motor will have for you once you give it that proper love that it needs.

[@TCraig00]

BMW underrates their engines a bit.

[@beyondroutinefitness-reach9906]

@@zekekilbourne hey, since this post, i am full on stage 2 with bolt on's. I love the car, BUT now i cannot put down any power with stock wheel size... there is always something that neeeds to be done. Probably 440 wheel at this point.

[@shaunmcinnis566]

My Z4 m40i is 382hp but feels like more. Feels faster than my c6.which is 436hp.

[@Metoy3r]

The torque makes a huge difference tbh! Same with the turbo, hits different than naturally aspirated

[@Viperoloff01]

So whats the difference between stage 1 and stage 2. I am in europe and the only gas options we have is 95/98/100 octane. So dont undertand the e or 85 you refer to.

[@zekekilbourne]

The EU uses a different fuel rating system than the us, that's why you probably don't understand that. I would look up the difference and see what you can find. Doing your research is very important, so I would start there if I were you.

[@MrDragon9000]

I’m not the most knowledgeable about BMW tuning but from what I’ve heard Stage 1 is just a simple computer tune up and stage 2 is a computer tune with bolt ons and simple mods like air intake, new exhaust etc.

[@mytube2415]

Great video, can you pass the emissions with the down pipe.

[@Gingerrising]

Not with the catless. If you need to pass emissions go with a high flow catted downpipe.

[@milkee798]

Can u pass smog in CA with a HF cat?​@@Gingerrising

[@paulsoncain6615]

“Hey i know….i’ll start my video with rubbing the dandruff out of my hair!”

[@Metoy3r]

Lol thank you for your comment

[@Htxracing97]

How much is too much mileage for a used 340i? I’m new to bmws and thinking about getting one.

[@masonkendall5984]

Sub 40 if possible

[@zephyr4705]

@@masonkendall5984I found a 2018 340i w 64K miles, fully stock m sport pkg, track handling pkg. serviced its whole life at the local bmw dealership. Supposed to pick it up for $23K. Think it’s a good buy? Mineral gray metallic over cognac Dakota. Thx

[@MrDavidchuck]

Hell no. Definitely an upsell.

[@zephyr4705]

@@MrDavidchuck are you familiar with the Southern California 340i market. They impossible to find

[@MrDavidchuck]

@@zephyr4705 I'm familiar with the concept of most states, when it comes to markets. Shouldn't at all restrict you from getting what you want and from where you can get it for the low. If you gotta travel, then do that. But an upsell is an upsell. When I had it, I bought my '17 340i earlier this year for $18k and some change, asking price was $21k w/ 42k miles on the chassis. They're out there. Know your shit and don't get fucked over.

[@v3tt3d]

Looking to add a B58, but would like to know X-Drive or Not? Which year/model?

[@DevPack]

Chargepipe?

[@samt9165]

The 440i gc 2017 have the same engine?

[@G0N907]

Yes

[@demonz4019]

Okay so what b58 do I have one or two 2018? 340i GT

[@TCraig00]

I think all 340i is gen 1. 2019 and newer M340i are gen 2 like the A90 supra.

[@702s.studios]

How much you selling the 340i I’m kinda interested in one but I gotta finance it 😂

[@jo_vonn_]

Felt that big bro that’s how I feel about the m240i

[@kirktheone]

W video

[@Metoy3r]

Thank you! 🙏🏽

[@sou2kk]

is it worth tuning a higher miliage 340i?

[@nolankoehn9724]

Depends on how many owners it’s had… most high mileage bmws have been beat to shit at some point between 50-150k miles

[@B58-Premo]

Look like mans just smoked a fat spliff 🤣

[@Metoy3r]

Nah I have extra tissue growth in my eye.. makes it red

[@justinm2690]

What’s next after you sell the 340, g80?

[@Metoy3r]

Haha what makes you think imma sell the 340? 👀

[@Metoy3r]

Yeah it’ll be in the market pretty soon

[@Thatblueb58]

Still daily driveable with the big turbo?

[@Metoy3r]

I sold the 340i a while ago but yes It was still my daily driver even with the big turbo

[@Thatblueb58]

@@Metoy3r Thanks so much for the reply! Lol been binge watching your 340 vids taking shipping of mine soon🙏🏾❤️

[@B58luja23]

He was baked!!😭

[@ayannanicolee8863]

what year does Gen 2 start?

[@carlosdeleon9593]

I believe 2020 with the new Supra and G20 340i

[@Berto25907]

Common b58 issues

[@caelanhall9660]

nah im tryna tune my 1998 Mercedes g900.9 trilliam

[@zekekilbourne]

Wrong place then, pal 😂

[@deontesthill20]

You can’t tune the car without sending in your dme…. You forgot to tell your fans that

[@Metoy3r]

Because that’s completed false information. Not every car requires you to send the DME

[@rudy3950]

@@Metoy3rwhats the difference between a femto unlock and a bench unlock is that the same thing? and do all cars need it? i have a 2020 m340 new to this bmw stuff

[@MrDavidchuck]

You’re mistaking that information that’s only based on the g20’s for the F30’s. The DME’s are locked on the 2021’s and up. Not the f30’s.