[ZM2]

Originally Posted by 3t3p

I thought BM3 stg 2 was same as MHD 2+ which is circa 420-430 bhp (I'm UK so it's always BHP).

You've said BM3 stage 2 is 30+ more hp than MHD, right?

Apparently.

[AmuroRay]

Originally Posted by ZM2

BM3 Stg 2 OTS maps are the best bang for the buck out there. 400whp (460-470bhp) on 93, no HPFP needed unless your stock HPFP is failing.

Stg 2+ 93 that requires an HPFP might only net you 10whp more bc the stock turbo is octane limited at that power level. Same for custom tunes, they don’t make sense unless you’re running an Emix—the person that was originally referenced for this thread wasted their money.

Stg 2 93 - 400whp
Stg 2+ 93, HPFP - 410whp
Stg 2+ 93, HPFP, PS2 - 445whp, lots of low end lag
Stg 2+ E30/Multimap, HPFP, E40-50 - 445whp peak, no lag, power drop in upper RPM
Stg 2+ E30/MM, HPFP, E50, Stg 1.5 turbo - 470whp to redline, no lag
Stg 2+ E30/MM, HPFP, E50, PS2 - 500whp, some lag on the bottom end

Add a Flexfuel sensor to the mix and the Stg 1.5 turbo setup that ThreeStripes is aiming for is the sweet spot for our cars.

Motivman made 535whp:
https://f30.bimmerpost.com/forums/sh...light=motivman

[ZM2]

Originally Posted by AmuroRay

Motivman made 535whp:
https://f30.bimmerpost.com/forums/sh...light=motivman

Newer OTS is dialed back from that one.

[ericlr1225]

Originally Posted by ///MPhatic

Loads of cars out there running BM3 S293 on 93 without issue. I tend to agree with you that the way to go is logs in all hard driving weather/season conditions to see how any particular car is keeping up, then HPFP + custom tune if there are issues, but for most it's a waste of time/money.

It's not like we're hearing about BM3 S293 + 93 octane cars blowing engines, so most are going to forego any extra expense.

There is no set-it forget-it thing on N55 M2, if it does, maybe keep it stock.
Like you said, evidence. As far as I know, there are 4+ people were having stock hpfp crashing issue, mine(2018 model) even crashed on stock tune but not enough to impact drivability. Better keep logging time to time if software is available. It's just luck. If tuning is a must, STG1 HPFP is worth the money to secure major engine issue and keep troubles away, also has the ability to run E85 to get 430ish whp with stock turbo or 480ish whp for stage 1.5 turbo safely in the future without upgrading other components.

[///MPhatic]

Originally Posted by ericlr1225

There is no set-it forget-it thing on N55 M2, if it does, maybe keep it stock.

I completely disagree. The vast majority of guys running BM3 S291 OTS with 93 fuel are having no issues at all (otherwise we'd be hearing about it). I can agree that there are certain cars that, for whatever reasons, will have an issue, but they are a rarity. Personally, I think the problem arises when guys get greedy or sloppy. Not always, but it's much more common. Running a 93 map on 93 octane is one way for sure, as it's very possible to get bad gas.

Originally Posted by ericlr1225

As far as I know, there are 4+ people were having stock hpfp crashing issue.

I think I would need to investigate the exact conditions surrounding these 4 people to make an assessment.

At this point vastly more people have had one of their rear springs crack than have had an issue from the fuel pump crashing.

But I'll ask Protuning Freaks and post their response here.

[ThreeStripes]

People are lazy and flash a new OTS tune, never datalog, and then when it doesn’t leave them on the side of the road proclaim the tunes are set it and forget it.

It’s not news that the BM3 tunes are aggressive.

Emailing PTF about this is a waste of your time and theirs homie.

[///MPhatic]

Originally Posted by ThreeStripes

People are lazy and flash a new OTS tune, never datalog, and then when it doesn’t leave them on the side of the road proclaim the tunes are set it and forget it.

It’s not news that the BM3 tunes are aggressive.

Emailing PTF about this is a waste of your time and theirs homie.

People aren't required to datalog with a flash. They literally paid someone else to do thousands of logs to provide a safe flash for them (with the required supporting modifications).

I don't consider people who don't log "lazy", and I don't consider it a waste of anyone's time to ask the tuner how safe their tune is point blank.

This will be my last response to you, as you are now on ignore because of your terrible attitude.

[AmuroRay]

Originally Posted by ///MPhatic

People aren't required to datalog with a flash. They literally paid someone else to do thousands of logs to provide a safe flash for them (with the required supporting modifications).

I don't consider people who don't log "lazy", and I don't consider it a waste of anyone's time to ask the tuner how safe their tune is point blank.

This will be my last response to you, as you are now on ignore because of your terrible attitude.

But he is correct that people should log to see if the tunes/modifications are working well for them.

While a BM3 and MHD are a good one size fits all, there are always outliers.

[ThreeStripes]

“I asked the used car dealer if the car was mechanically sound and he said yes so there, it’s settled.”

https://f87.bimmerpost.com/forums/sh...1614600&page=9

This thread is worth a read. Sharing it won’t help the daisy with his head in the sand but such is life.

[///MPhatic]

Originally Posted by AmuroRay

But he is correct that people can log to see if the tunes/modifications are working well for them.

While a BM3 and MHD are a good one size fits all, there are always outliers.

Fixed.

[3t3p]

Far as I've seen MHD you can run 98 map with 98 RON and it's still slightly conservative whereas widetyres proved with his Dyno runs that you should run 95 map with 98 RON on BM3 stg2 to actually make more, safer power.

[ericlr1225]

Originally Posted by ///MPhatic

Fixed.

I'm just sharing what I experienced. When I start tuning my car, I did a good amount of research. Quality parts, tuned conservatively. When I flashed my car, I literally just unlocked my ECU and start logging stock tune, hpfp dropped but still ok. then stage 1 91oct.
where hpfp fail dramatically. I'm just kindly remind all M2 tuners or N55 tuners, pay a little attention on hardware like HPFP, it won't hurt.

When engine running lean, super knock happens. I had super knock once, luckily nothing major damage to intervals.
BMW engines love Oct, and BM3 is aggressive compare to other tuning software. Can't take granted for your local gas quality, hardware health. It can lead to serious damage to your car.

And the only effort you need to do is, open the app, find a straight road, 40mph-100mph WOT. Open the graph and check, my 9 years old son know how to read act/target hpfp pressure after 5min explaination.

Hope everything is running perfect for everyone, Enjoy~

[F87Tomei]

Originally Posted by ericlr1225

I'm just sharing what I experienced. When I start tuning my car, I did a good amount of research. Quality parts, tuned conservatively. When I flashed my car, I literally just unlocked my ECU and start logging stock tune, hpfp dropped but still ok. then stage 1 91oct.
where hpfp fail dramatically. I'm just kindly remind all M2 tuners or N55 tuners, pay a little attention on hardware like HPFP, it won't hurt.

When engine running lean, super knock happens. I had super knock once, luckily nothing major damage to intervals.
BMW engines love Oct, and BM3 is aggressive compare to other tuning software. Can't take granted for your local gas quality, hardware health. It can lead to serious damage to your car.

And the only effort you need to do is, open the app, find a straight road, 40mph-100mph WOT. Open the graph and check, my 9 years old son know how to read act/target hpfp pressure after 5min explaination.

Hope everything is running perfect for everyone, Enjoy~

You have an awesome son. Teaching him right.

[samsamdar]

Originally Posted by ThreeStripes

Agreed. HPFP and a custom tune is the way. Running blind by not reviewing data logs is not. Intakes for these cars are stupid imo, but many disagree.

I’m BM3 OTS S291 running 93 from Shell and I still see uneven timing (CSF IC).

I’m remedying this with a custom tune from Bend Calibration (and a Pure500 for good measure). They require a HPFP to support N55 cars for whatever that’s worth. This is the real set it and forget it option, but it ain’t cheap and without effort.

Please let us know how the Pure500 is! I really really wanna get one lol

[ThreeStripes]

Originally Posted by samsamdar

Please let us know how the Pure500 is! I really really wanna get one lol

Will do. Assembling parts now. ETA to installation and tuning is late November. Will absolutely dyno the car before and after on 93 and then see what she do with ethanol set to kill.

Shout out to Mike at XPH for all the bits and bobs to make it happen.

[3t3p]

Originally Posted by ThreeStripes

Will do. Assembling parts now. ETA to installation and tuning is late November. Will absolutely dyno the car before and after on 93 and then see what she do with ethanol set to kill.

Shout out to Mike at XPH for all the bits and bobs to make it happen.

Awesome threestripes. Will you be using any OTS tunes or going straight to custom?

I ask as wonder what one of these turbos will perform like with BM3/MHD stg2 OTS maps, cheers

[ThreeStripes]

I’ll be going to the custom Bend Cal tune post install and definitely ahead of the dyno. I am curious what a before and after looks like though so I’d like to get a run in with the Bend/Pure500/HPFP on 93 to compare to the “before” run on BM3 S291 running 93.

This exercise is first and foremost for reliability and peace of mind on track. The power benefits are a kick ass secondary benefit. All hail E85.

[samsamdar]

I’ve been loving my current stock turbo setup on full e85 but the turbo running out of steam up top is pissing me off lol. I also hate the PS2 lag so I’m really hoping the Pure500 is the move

[AmuroRay]

Originally Posted by ThreeStripes

I’ll be going to the custom Bend Cal tune post install and definitely ahead of the dyno. I am curious what a before and after looks like though so I’d like to get a run in with the Bend/Pure500/HPFP on 93 to compare to the “before” run on BM3 S291 running 93.

This exercise is first and foremost for reliability and peace of mind on track. The power benefits are a kick ass secondary benefit. All hail E85.

What are the current mods? Do you have any current logs I can review?

Originally Posted by samsamdar

I’ve been loving my current stock turbo setup on full e85 but the turbo running out of steam up top is pissing me off lol. I also hate the PS2 lag so I’m really hoping the Pure500 is the move

Same with you - current mods? Do you have any logs I can review?

[ThreeStripes]

S2 91 running Shell 93 05/2023
https://bootmod3.net/log?id=641d066bd10b4341f2c996cb

S2 93 running 93 and maybe some 95 octane from a local Chevron? 10/2021
https://bootmod3.net/log?id=6178a49bae729b38d5eedf9f

Problem with my all these old logs is I can’t remember the details like ambient temp and fuel details. I definitely saw cleaner timing when temps dropped enough to keep IATs lower but even with that and what was allegedly 95 octane Chevron fuel I was still seeing corrections.

Active Auto cat dp, CSF for both. NGK plugs but have recently moved back to OEM with the M logo. Haven’t logged since that plug swap but need to. I’ll be on track all weekend so I may try and grab a log on a late Sunday session.

[WeekendWarriorz]

MHD has a new OTS full e85 map for cars equipped with upgraded hpfp’s. They said these maps have more torque/power through the midrange. Would be very curious what it dyno’s if anyone with MHD/uograded hpfp wants to try it out or do some pulls/run some logs

[3t3p]

Originally Posted by WeekendWarriorz

MHD has a new OTS full e85 map for cars equipped with upgraded hpfp’s. They said these maps have more torque/power through the midrange. Would be very curious what it dyno’s if anyone with MHD/uograded hpfp wants to try it out or do some pulls/run some logs

Yeh they do, I wanted it to provide gains to 98 fuel but they said it was marginal to impossible however nothing stopping from trying just might be a waste of money.
Although I do wonder that HPFP map with (upgraded HPFP) and a pure 500 turbo might be nice?