[JonasM40i]

I am wondering, if the B58 powertrain is more effective than the S58 in the X3M.

I am currently running 100-200 km/h in 7,5 sec and 0-100 in 3.15 with about 580 HP in my M40i.

The X3M Comp with claimed 510hp does 0-100 in 3,8 and 100-200 in 9,8.

The M40i is about 150kg lighter than the X3M, but weight does not
matter much at the 100-200 time.

So why this big difference?

Edit: Based on calculations more like about 560 engine hp.

[Oldgixxer]

[ContactPatch]

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[SpeedOften]

Originally Posted by JonasM40i

I am wondering, if the B58 powertrain is more effective than the S58 in the X3M.

I am currently running 100-200 km/h in 7,5 sec and 0-100 in 3.15 with about 580 HP in my M40i.

The X3M Comp with claimed 510hp does 0-100 in 3,8 and 100-200 in 9,8.

The M40i is about 150kg lighter than the X3M, but weight does not
matter much at the 100-200 time.

So why this big difference?

List your mods. List your fuel. List your tuner.

[AshtonPJT]

Originally Posted by SpeedOften

List your mods. List your fuel. List your tuner.

70hp will make all the difference, on my car with a 50hp increase I saw .5 better on 0-60 without launching and about 3 seconds faster in 60-130.

S58 is by far the superior drive train for the x3. With downpipes and a tune we have the x3ms in the 9s

[Leem40i]

One, your nodded. Two, the b58 has better power delivery in the usable range. All of the difference in power with the full m is more on the top end

[SpeedOften]

Originally Posted by AshtonPJT

70hp will make all the difference, on my car with a 50hp increase I saw .5 better on 0-60 without launching and about 3 seconds faster in 60-130.

S58 is by far the superior drive train for the x3. With downpipes and a tune we have the x3ms in the 9s

I was hoping OP might think about his mods...

[JonasM40i]

That a tuned S58 is faster is a nobrainer.

Thats not what I am talking about. When I had a simple MHD OTS map stage 2 tune I had about 460HP and the same times like a X3M with 510 HP.

I would have though, to go that much quicker from 100-200 you need way more tham additional 50 HP.

I have an upgrade Turbo and running 100 Ron and a MHD custom map.

For me its just brutal, that my daily driver is now faster than my "fun" car (992 GT3).

[Leem40i]

Originally Posted by JonasM40i

That a tuned S58 is faster is a nobrainer.

Thats not what I am talking about. When I had a simple MHD OTS map stage 2 tune I had about 460HP and the same times like a X3M with 510 HP.

I would have though, to go that much quicker from 100-200 you need way more tham additional 50 HP.

I have an upgrade Turbo and running 100 Ron and a MHD custom map.

That 510 horsepower is crank horsepower. The 460 horsepower your car is making is wheel horsepower. You understand the difference right?

[JonasM40i]

Originally Posted by Leem40i

That 510 horsepower is crank horsepower. The 460 horsepower your car is making is wheel horsepower. You understand the difference right?

No, the 460 are also crank, which I made. I am from Europe and only talking about crank HP.

[Leem40i]

No, the 460 are also crank, which I made. I am from Europe and only talking about crank HP.

What year model is your x3? So to the wheels you're making over 500 horsepower?

[JonasM40i]

Model Year 2023.

I am making now about 560 engine HP.

I haven't been on the dyno jet. But when I look at the log, I had with MHD Stage 2 361 maf g/s which is about 452 engine hp.
Now with upgrade turbo I have 437 maf g/s which is about 550 engine hp.

But the tune is not finished, just the basemap.

[ASAP]

I don't know what I just read to be honest...

A B58 is a fine engine and can be tuned for very strong performance... but the S58 is a more powerful motor and can be tuned for more power. Stock turbo to me is the only way to compare motors... and the B58 won't touch an S58 in that scenario.

The lighter X3 M40i stock makes 382 and on E85 might make 460 WHP if lucky... an X3M dynos close to 460 stock... due to turbo limitation, the X3 M40i can't touch that stock. Also - weight does not matter in 100-200 time? I would say quite the opposite... once you are moving...a heavier vehicle will have to pay a much stronger penalty (more power) to perform better at a high speed.

[JonasM40i]

Originally Posted by AshtonPJT

70hp will make all the difference, on my car with a 50hp increase I saw .5 better on 0-60 without launching and about 3 seconds faster in 60-130.

When 50HP did that effect in your case, why does a stock M40i with 360 HP (in my case) 100-200 stock 13,2 sek and a X3M with 510HP is only 3,2 sek faster?

[JonasM40i]

Originally Posted by ASAP

I don't know what I just read to be honest...

A B58 is a fine engine and can be tuned for very strong performance... but the S58 is a more powerful motor and can be tuned for more power. Stock turbo to me is the only way to compare motors... and the B58 won't touch an S58 in that scenario.

The lighter X3 M40i stock makes 382 and on E85 might make 460 WHP if lucky... an X3M dynos close to 460 stock... due to turbo limitation, the X3 M40i can't touch that stock. Also - weight does not matter in 100-200 time? I would say quite the opposite... once you are moving...a heavier vehicle will have to pay a much stronger penalty (more power) to perform better at a high speed.

I think you did not understand my original post.

Its not about comparing the stock engines.

I was just wondering, if the whole drivetrain of the M40i is more effective than the one in the X3M, because in my opinion the M40i tuned makes the same time with less HP and way better times with just a bit more Horsepower than the X3M.

It is annoying that some people are so easily offended (not you) and can't give simple answers.

[JonasM40i]

Originally Posted by ASAP

Also - weight does not matter in 100-200 time? I would say quite the opposite... once you are moving...a heavier vehicle will have to pay a much stronger penalty (more power) to perform better at a high speed.

A friend of mine weighs 95kg. With him as a passenger, my 100-200 time was 0,1 slower.

Aerodynamics is much more important at those speeds than weight.

I'll bet if you delete the wing from my GT3 it would effect the 100-200 time much more then letting the passenger out of the car.

[Burr001]

Originally Posted by JonasM40i

I think you did not understand my original post.

Its not about comparing the stock engines.

I was just wondering, if the whole drivetrain of the M40i is more effective than the one in the X3M, because in my opinion the M40i tuned makes the same time with less HP and way better times with just a bit more Horsepower than the X3M.

It is annoying that some people are so easily offended (not you) and can't give simple answers.

Ok..the question here is which engine and powertrain combination is more efficient in delivering power...the problem that you comparing a tuned vehicle with upgrade turbo vs a stock factory tuned s58.

Being that your getting faster response and spool since being tuned and the upgrade turbo obviously will yeild a better/faster time as a whole.

Now with that said if a stock s58 engine is to perform from the factory and yet be reliable the stock tune will not be as efficient in power delivery.

Now if we were able to compare your vehicle and just a tuned stock turbos s58 that will have a better baseline in comparison.
It's like comparing a dull knife with a knife that just got sharpened...the sharper knife will always work better which here will be the numbers your x3 is putting down.

[JonasM40i]

Burr001 Thank you for that explanation.
That's what my question was about.

I now get it.

I am not saying a M40i is better than an X3M. I am not dumb.

For me, the M40i was simpy the better choice.

[Burr001]

Originally Posted by JonasM40i

Burr001 Thank you for that explanation.
That's what my question was about.

I now get it.

I am not saying a M40i is better than an X3M. I am not dumb.

For me, the M40i was simpy the better choice.

M40i was the better choice for me as well..with all the mods I've done and plan to it is great platform. Great usable lower torque band for me and not paying the extra "M" tax on upgrades is a bonus.

[JonasM40i]

Originally Posted by Burr001

M40i was the better choice for me as well..with all the mods I've done and plan to it is great platform. Great usable lower torque band for me and not paying the extra "M" tax on upgrades is a bonus.

I have to say, I never modded a car before.

But i read so much about the B58, how much they can handle an so on, that I gave it a try and now I am fully into it 😅

Having done now rims, springs, Dorch fuel pump, Intake and charge pipe, upgrade turbo, downpipe, OPF delete, air filter and many "visual" things like front splitter, side skirts and so on. 😂

I love this forum because in europe, especially the X3 isn't modded often, so you have tiny information about it.