[Dreculah]

I just switched from my 2007 E92 6MT with full bolt ons, M3 suspension mods, Procede tune to a M240i 8AT.

Even with a stage 1 BM3 tune on the M240i, the B58 seems to run out of power at a lower RPM than the N54. I don't know why the redline isn't 6k rpms, or even a little lower.

Also, the 8AT makes worse choices than a teenager on crack when it comes to picking a gear for WOT on the freeway. It will jump into a gear above the power band if I floor it, more often than not.

I really miss the heavy steering of the E92.

Kvetching aside, it is very strong in the mid RPM range and definitely feels lighter and more nimble than the E92.

I guess there's nothing short of a turbo upgrade that can fix the powerband problem. Maybe a transmission tune can adjust the shift points to keep it in the sweet spot?

Do you think catless DP and CAI would help any with power up top?

[MassNerd]

You're correct that torque drops off after 5000rpm, but I don't think I'd describe a car which generates over 400lb/ft from 2500rpm-5000rpm as having a "powerband problem". Especially with a 8spd transmission. A 2500rpm range for peak torque is pretty awesome!

I think I've seen posts about people getting quicker 1/4 mile results hitting a manual upshift before 6000rpm. Or a transmission tune could probably be done as you stated.

[marcthedark]

A downpipe definitively helps up top and a pure turbo (or similar) would do the same
https://f30.bimmerpost.com/forums/sh....php?t=1330536

And if you go for a transmission tune (depending on which one) you can even create your custom map
https://www.xhpflashtool.com/

But honestly i rarely ran into the problems you are having, but with the traffic in the tri-state area (and lots of cops) the opportunity to hoon rarely comes up

[Dreculah]

Originally Posted by marcthedark

A downpipe definitively helps up top and a pure turbo (or similar) would do the same
https://f30.bimmerpost.com/forums/sh....php?t=1330536

And if you go for a transmission tune (depending on which one) you can even create your custom map
https://www.xhpflashtool.com/

But honestly i rarely ran into the problems you are having, but with the traffic in the tri-state area (and lots of cops) the opportunity to hoon rarely comes up

There's a chance I might be moving to NJ (Englewood Cliffs area), so good to know about the cop density ahead of time.

I wonder what the Stage 3 transmission tune will do to the ZF's longevity.

[marcthedark]

Originally Posted by Dreculah

There's a chance I might be moving to NJ (Englewood Cliffs area), so good to know about the cop density ahead of time.

I wonder what the Stage 3 transmission tune will do to the ZF's longevity.

My wife worked around there ..... normally lots of traffic so you won't have the chance to really break the speed limit (doing 75 on the 65 turnpike doesn't count as this is just what everyone does). My impression is that most of the time it isn't the speed but the weaving from one lane to another that gets people in trouble (obviously they are speeding too).

the ZF is now around for a while and can't remember any horror stories, but once I tune my transmission (aka once I decide if I keep the car or give it back at lease end) I'll stick to stage 2

[mike@x-ph.com]

Originally Posted by Dreculah

I just switched from my 2007 E92 6MT with full bolt ons, M3 suspension mods, Procede tune to a M240i 8AT.

Even with a stage 1 tune on the M240i, the B58 seems to run out of power at a lower RPM than the N54. I don't know why the redline isn't 6k rpms, or even a little lower.

Also, the 8AT makes worse choices than a teenager on crack when it comes to picking a gear for WOT on the freeway. It will jump into a gear above the power band if I floor it, more often than not.

I really miss the heavy steering of the E92.

Kvetching aside, it is very strong in the mid RPM range and definitely feels lighter and more nimble than the E92.

I guess there's nothing short of a turbo upgrade that can fix the powerband problem. Maybe a transmission tune can adjust the shift points to keep it in the sweet spot?

Do you think catless DP and CAI would help any with power up top?

the 07 335 was a special car, that being said you are comparing a tuned car vs stock. Once you go FBO on the M240 you'll be a lot happier with the power comparison.

I do agree with you about heavy steering

[olehead]

Any car that runs low 12 in bad air and high 11 in good air puts the M240I in pretty good company on any Drag Strip

[jondagger]

My m235i has below mods custom tuned. Turbo drops about 1-2 PSI after 5.5K RPMs but timing makes up for it some. Im now shifting a bit early after noticing it, around 6.3k or so. Get a DP and custom tune from JordanTuned on BM3 and you should be doing 480hp easy. You can even run e60.

[bryan_G01]

that 240 b58 is a monster. I pull buses on fbo e92 in a x3 m40 thats tuned.

are you driving in sport plus? Even stock, the b58 is as fast a fbo tuned n55.

[jgalaxy]

Originally Posted by Dreculah

I just switched from my 2007 E92 6MT with full bolt ons, M3 suspension mods, Procede tune to a M240i 8AT.

Even with a stage 1 BM3 tune on the M240i, the B58 seems to run out of power at a lower RPM than the N54. I don't know why the redline isn't 6k rpms, or even a little lower.

Also, the 8AT makes worse choices than a teenager on crack when it comes to picking a gear for WOT on the freeway. It will jump into a gear above the power band if I floor it, more often than not.

I really miss the heavy steering of the E92.

Kvetching aside, it is very strong in the mid RPM range and definitely feels lighter and more nimble than the E92.

I guess there's nothing short of a turbo upgrade that can fix the powerband problem. Maybe a transmission tune can adjust the shift points to keep it in the sweet spot?

Do you think catless DP and CAI would help any with power up top?

I loved my N54 e92MT, JB4, BT dual CAI, catless DP and KWv3. The M240 has a lot going for it. Light steering aside, once modded, to me it will be the better hot rod.

[Dreculah]

Originally Posted by bryan_G01

that 240 b58 is a monster. I pull buses on fbo e92 in a x3 m40 thats tuned.

are you driving in sport plus? Even stock, the b58 is as fast a fbo tuned n55.

I think the N54 responded to tuning better than the N55, and I was lucky to get a really strong N54 stock out of the box.

Part of my adjustment has been driving the first car I've had with an auto vs 6MT in like 20 years. Crisper shifts would be good, but not at the expense of impacting the durability of the transmission.

Normally I'm way too lazy to switch out of Comfort. If there was a way to have it default to 'Sport', I'd probably do it. After a bit more time with the car, I think fixing the shift points and a downpipe + intake will get me where I want to go, performance wise.

[XutvJet]

The B58 is not running out of steam in the upper
rpms and I can assure you it's making more power longer than any typical FBO N54 too. Look at the dynos. The B58 peaks at around 5000rpms but sustains that peak power all the way to 7000rpms. By the seat of the pants it doesn't feel like it's pulling hard above 5000rpms but it is. FBO N54s peak at around 5300rpms and power drops in a linear fashion after peak. The N55 and B58 own the N54 above 5300rpms. The EWG N55 peaks at around 6200rpms and sustains its power to around 6700rpms and then power drops off.

Calculate the ideal shift points max acceleration for the B58 and N55 and it's redline for every gear. That's also why the 8at is programmed to shift at that rpm at WOT as well.

[XutvJet]

Originally Posted by bryan_G01

that 240 b58 is a monster. I pull buses on fbo e92 in a x3 m40 thats tuned.

are you driving in sport plus? Even stock, the b58 is as fast a fbo tuned n55.

The B58 is impressive in stock form but let's not get ahead of ourselves. A FBO EWG N55 on pump gas will make 390whp and 420wtq on a Dynojet. A stock B58 makes around 330whp/350wtq. A FBO B58 on pump gas will make around 400whp/440wtq. Once you add meth, ethanol, etc., the B58 has a bigger advantage over the N55.

[sea_m2c]

Originally Posted by bryan_G01

that 240 b58 is a monster. I pull buses on fbo e92 in a x3 m40 thats tuned.

are you driving in sport plus? Even stock, the b58 is as fast a fbo tuned n55.

That's completely false lol. Where did you come up with that?

[B58togo]

Originally Posted by XutvJet

The B58 is impressive in stock form but let's not get ahead of ourselves. A FBO EWG N55 on pump gas will make 390whp and 420wtq on a Dynojet. A stock B58 makes around 330whp/350wtq. A FBO B58 on pump gas will make around 400whp/440wtq. Once you add meth, ethanol, etc., the B58 has a bigger advantage over the N55.

Stage 2 BM3/catless DP B58’s are making more like 420-430 whp, even more on e30.

[MR.///M]

Originally Posted by XutvJet

The B58 is impressive in stock form but let's not get ahead of ourselves. A FBO EWG N55 on pump gas will make 390whp and 420wtq on a Dynojet. A stock B58 makes around 330whp/350wtq. A FBO B58 on pump gas will make around 400whp/440wtq. Once you add meth, ethanol, etc., the B58 has a bigger advantage over the N55.

I can vouch for this. My stock 18' M240 8SP Auto vs my buddies 14' M235i STG 2, 6mt, FBO, BM3, e30, ( stock fuel pumps and chargepipe) were neck and neck literally. We were honestly so shocked. However, recently he turned off all of his burble settings and hes been pulling on me little by little. Car obviously seems to like it way more. My guess hes pushing 410ish whp 450tq feels like a rocket.

[bryan_G01]

like i said... beats a fbo n55 with just good fuel.

[bryan_G01]

Originally Posted by sea_m235i

That's completely false lol. Where did you come up with that?

I drove them and didn't believe everything the internet says.

[jv92red]

Coming from my recently sold 2010 E92 M3 with the S65 V8 that has a 8,300 red line and with ALL of its power up top to now driving the B58 240i I will say this - I REALLY enjoy the torque down low and in the mid-range RPM of my 240i. Two completely different power deliveries at both ends of the spectrum. My 240i feels like a go cart. Just puttin around town and need more power and it will be almost instantaneous with a push of the pedal. My M3... not so much. It would have needed to be up in the revs around at least 6k to 7K at that instant to give it gas or downshift but that's the issue, to drive the M3 fast around town you have to literally have to drive it like a A-Hole. One thing is for certain - the S65 V8 was probably the best sounding BMW I've ever heard. The exhaust in that car is just pure joy to listen to all the way up past 8K RPM.

Then there was the constant worrying if the bearings were going to go out and those S65 motors are expensive to rebuild and that's if there's no issues with the block. Used S65 motors sell for around 10K!

The M3 had unreal steering and handled well but for around town and for the torque, my 240i is SO much more enjoyable to drive around town. And I'm ok with the 240i steering.

Geting back on track - I guess coming from a N55 or N54 I may have a different opionion of the B58. Coming from the S65 V8, this B58 is a blast to drive even with it not holding a candle in the high RPM's like i'm used to.