-B58 Let me see your Tuned 340i dyno!

Mkswoosh · 11-18-2019, 11:34 PM

BM3 Stage 2 91oct catless downpipe

IMS-340C · 11-19-2019, 04:26 AM

It's amazing how your HP curve looks like a NA engine, usually B58s peaks around 5000 RPM and stay flat or even drop a bit from there.

Quote:

Originally Posted by Nugget

BCS catted downpipe and OTS BM3 E30 tune.
Made 307whp on this dyno Stock

kern417 · 11-19-2019, 06:06 AM

Quote:

Originally Posted by Boomsatty

Not to hijack but has anyone compared a FBO N54 car to a stage 1 or 2 B58 car? I am flashing mine tonight with an MHD stage 1+ tune and wondering how it'll match up to a FBO N54.

I missed an opportunity but i'm hoping to soon. Just need to find someone that isn't upgrading turbos this winter.

Quote:

Originally Posted by MyNameIsNotSure

I never quiiiite get those feelings in my B58, even though I can tell it's fast. I don't think it's a case of how the torque comes on more linearly either. Kinda bummed about it honestly but I have yet to bring this up to the PTF guys since I haven't had time to go grab logs. Hopefully they can somehow squeeze some more power out of it.

You have to compare the tunes to understand. Instead of requesting 20psi and tapering to 10psi at redline, our cars hold 16psi flat. So you don't feel power drop off in the upper RPM range, but you also don't feel as hard of a shove up front. It performs more like a less responsive N/A engine than a torquey modern turbo engine.

I don't mind it, but I know some people have said that custom tunes help fill in the gap, but it won't necessarily make more power. Jut more torque down low.

Nugget · 11-19-2019, 07:28 AM

Quote:

Originally Posted by IMS-340MP

It's amazing how your HP curve looks like a NA engine, usually B58s peaks around 5000 RPM and stay flat or even drop a bit from there.

My MP stage 2 dyno looked like that.
This is MP stage 2 vs stock. You can see how much they hold back in the stock tune as it just goes flat at 300whp from before 5k rpms (rpm scaling is a bit off as they couldn't get a good tach signal and got the 'speed to rpm' calc slightly wrong).

IMS-340C · 11-19-2019, 10:24 AM

Must be more enjoyable to drive and feels like NA engines with that power curve instead of the flat HP curve.

I like the B58 but I definitely miss the NA engines era, I remember driving the E60 M5 when it came out and that NA V10 engine was incredible.

Quote:

Originally Posted by Nugget

My MP stage 2 dyno looked like that.
This is MP stage 2 vs stock. You can see how much they hold back in the stock tune as it just goes flat at 300whp from before 5k rpms (rpm scaling is a bit off as they couldn't get a good tach signal and got the 'speed to rpm' calc slightly wrong).

lonewolfB58 · 11-19-2019, 07:42 PM

Quote:

Originally Posted by Mkswoosh

BM3 Stage 2 91oct catless downpipe

Did your car come with the Mppsk exhaust system from factory?

Londoner · 12-18-2019, 07:35 AM

Quote:

Originally Posted by IMS-340MP

Must be more enjoyable to drive and feels like NA engines with that power curve instead of the flat HP curve.

I like the B58 but I definitely miss the NA engines era, I remember driving the E60 M5 when it came out and that NA V10 engine was incredible.

Agreed. And the turbo lag (whilst not bad) is such a pain in the ass. I guess only the (Jag 3.0l XE etc?) supercharged engines do away with it?

f30stove · 12-18-2019, 02:10 PM

Bm3 stage 2 e30
Catless dp
Intake
xHP stage 3
Was damn near 100 degrees that day also so I could've probably squeezed a few more ponies

PURE340i · 12-18-2019, 04:46 PM

I did best of 410rwhp & 426 ft-lb STD on a Dyno Jet with just a JB4, intake, catted down-pipe, and 3 gallons of E85 mixed with 91 octane back when there were no flash tunes available. Later installed Pure Stage 1 turbo with meth and did almost 480rwhp with only 21 psi and we were going to finish tuning it around 25 psi with the JB4 + MHD custom back end flash.....unfortunately parted away and sold the car so i never got the real results and final tuning done.

janea1207 · 12-19-2019, 07:45 AM

Quote:

Originally Posted by PURE340i

I did best of 410rwhp & 426 ft-lb STD on a Dyno Jet with just a JB4, intake, catted down-pipe, and 3 gallons of E85 mixed with 91 octane back when there were no flash tunes available. Later installed Pure Stage 1 turbo with meth and did almost 480rwhp with only 21 psi and we were going to finish tuning it around 25 psi with the JB4 + MHD custom back end flash.....unfortunately parted away and sold the car so i never got the real results and final tuning done.

But how many HP will have with Pure stage1&TU HPFP on pump gas and without meth?

bsas340i · 12-20-2019, 04:12 PM

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HaloF30 · 12-21-2019, 01:46 AM

Quote:

Originally Posted by bsas340i

Attachment 2202747

is this bm3 stage one or?

RedBarron · 12-21-2019, 07:00 AM

Quote:

Originally Posted by bsas340i

Attachment 2202747

Hey, we are local and went to the same dyno!

PURE340i · 12-21-2019, 12:15 PM

Quote:

Originally Posted by janea1207

But how many HP will have with Pure stage1&TU HPFP on pump gas and without meth?

I don't know

Only way to find out is having someone strap it to a dyno

ckrieg · 12-21-2019, 02:49 PM

Quote:

Originally Posted by HaloF30

is this bm3 stage one or?

From his Sig, I'm think it's the Activ-8 tune

bsas340i · 01-08-2020, 02:54 PM

Quote:

Originally Posted by RedBarron

Hey, we are local and went to the same dyno!

Sorry bud, I just saw this message. Yes, I went to see Dave there but I don't think he's at that shop anymore. Great guy, very knowledgeable and down to earth. I think he's working on his own at this point. By the way, great numbers! I will not have the car for much longer so I didn't pursue the flash option. When I purchased the Activ-8, there were no flash tunes available for the B58. Aside from the normal bashing, I am very happy with the performance of this piggyback. The car put out very decent numbers, it pulls much harder than stock, never had a CEL (knocking on wood) and the gas mileage is exactly the same.
See you around Jax! Drive safe

bsas340i · 01-08-2020, 02:57 PM

Quote:

Originally Posted by HaloF30

is this bm3 stage one or?

This is Activ-8, Dinan CF Cold Air Intake and Dinan Mip-Pipe. The other dyno sheet from the same shop corresponds to a 440i that has the BM3 Stg 1. Maybe that's where the confusion came from.

SC_B5X · 01-08-2020, 05:21 PM

ilkthat · 01-08-2020, 06:25 PM

Quote:

Originally Posted by SC_B5X

How are you running e50 on stock fuel system ? No cpi kit or upgraded high pressure fuel pump ?

SC_B5X · 01-08-2020, 06:50 PM

Quote:

Originally Posted by ilkthat

How are you running e50 on stock fuel system ? No cpi kit or upgraded high pressure fuel pump ?

Never said i'm on stock fuel system. I'm using a Dorch Engineering Stage 1 HPFP.

Edit: Just realized I forgot to list my HPFP in the video description, that's my bad.

Supr3me · 02-29-2020, 07:42 PM

Here's my E50 custom Wedge tune, 5th gear.

ilkthat · 03-01-2020, 04:15 AM

Quote:

Originally Posted by Sµpreme

Here's my E50 custom Wedge tune, 5th gear.

wedge performance is amazing im using same custom tune no regrets want them to do a flame tune for me as well i should be around 480 -500 wheel just like you guys

11-18-2019, 11:34 PM	#23
Mkswoosh First Lieutenant 93 Rep 385 Posts Drives: 2018 340xi tanzanite blue Join Date: Nov 2018 Location: Portland iTrader: (0) Garage List 2018 BMW 340xi [0.00] 2021 Ford Bronco Ba ... [0.00] 2015 Kawasaki Ninja ... [0.00]	BM3 Stage 2 91oct catless downpipe Attached Images Last edited by Mkswoosh; 11-18-2019 at 11:40 PM..
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12-18-2019, 02:10 PM	#30
f30stove New Member 16 Rep 20 Posts Drives: BMW 340i Join Date: May 2019 Location: Atlanta iTrader: (0)	Bm3 stage 2 e30 Catless dp Intake xHP stage 3 Was damn near 100 degrees that day also so I could've probably squeezed a few more ponies Attached Images
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12-18-2019, 04:46 PM	#31
PURE340i Banned 104 Rep 231 Posts Drives: 2018 BMW 340i & 2011 335d Join Date: May 2017 Location: California iTrader: (0)	I did best of 410rwhp & 426 ft-lb STD on a Dyno Jet with just a JB4, intake, catted down-pipe, and 3 gallons of E85 mixed with 91 octane back when there were no flash tunes available. Later installed Pure Stage 1 turbo with meth and did almost 480rwhp with only 21 psi and we were going to finish tuning it around 25 psi with the JB4 + MHD custom back end flash.....unfortunately parted away and sold the car so i never got the real results and final tuning done.
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12-20-2019, 04:12 PM	#33
bsas340i Private 106 Rep 91 Posts Drives: 2022 BMW M5 Comp Join Date: Sep 2017 Location: Jacksonville, FL iTrader: (0) Garage List 2021 BMW X5 [0.00] 2022 BMW M5 [9.50] 2004 BMW K1200RS [10.00]	__________________ 2022 M5: MBB/Aragon Ext Leather/ZCP/ZEC/789M' Wheels/Alu Carbon Struct Dark Trim/Red Calipers 2021 X5 sDr40i: Jet Black/Ivory White Ext Merino Leather/ZP2/ZPK/20'' Wheels (738)/Multi-Contour seats, Htd seats/armrests/steering wheel
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01-08-2020, 05:21 PM	#40
SC_B5X Built Motor F30 340i 403 Rep 257 Posts Drives: Built Motor 2016 BMW 340i Join Date: May 2019 Location: Greenville, SC iTrader: (0)	__________________ Owner of MRM Performance Sales@MRMPerformance.com Built Motor BMW 340i
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02-29-2020, 07:42 PM	#43
Supr3me Captain 551 Rep 684 Posts Drives: Your mom crazy Join Date: Feb 2015 Location: Sioux Falls SD iTrader: (0) Garage List 2020 BMW X3M CURRENT [0.00] 2016 BMW 340i BEAST [0.00] 2011 BMW 335i RIP [0.00] 2003 BMW 330i SOLD [0.00]	Here's my E50 custom Wedge tune, 5th gear. Attached Images __________________ 2020 X3M MG Flasher; Wedge Performance E50 tune MSS Urban; Rohana RFX11
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