Making power in my F31 340i
Making power in my F31 340i
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ChrisC-Berks

Original Poster:

93 posts

91 months

Sunday 6th February 2022
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I've copied this from a BMW forum I posted on but thought I'd share the story here for those of you who care.

Also if anyone wants to follow more updates the car has it's own instagram account - pure_f31 - https://www.instagram.com/pure_f31/


Feb 2018: DAY 1
I purchased the car from Cotswold BMW (Cheltenham) and was instantly hooked on the power and way the car drove. I could write a small essay about Cotswold BMW how they are so amazing when you are buying the car and seem to bend over backwards for you but once you're in the car they don't even remember your name.... Onto the car... The drive home was a world away from the journey there in the boring Volvo V50 D5 I used to get there. The Volvo isn't exactly slow and they're both estates but that's about it. Leaving the forecourt was somewhat scared by the power and think I stayed in comfort or sport all of the way home until the last roundabout before my house - I regretted thinking I knew what I was doing but somehow didn't crash. I didn't know about moving the stick to the left or anything like that but wow what a car. I can see why people leave them stock.



March 2018: 'It Starts'
I managed to meet up with a couple of locals (well, they were local at the time) who I met off of the f30 forum and I got to hear an MPPSK exhaust and a Remus system. I was convinced I needed the MPPSK exhaust because it sounded so absurd and childish. I wasn't too bothered about the minor power increase it was all about the sound. I'm 99.9% sure that this day started my journey to where I am today.




Mid March 2018: 'Rattle'
Fast forward a few weeks and my stock exhaust had a bit of a rattle - quite common apparently - so I contacted Coopers BMW in Reading. They did me a deal on MPPSK that I couldn't refuse so I ended up getting booked in.



April 2018: Pops and Bangs!
Oh my how childish the car is with the MPPSK fitted! The car was a little bit quicker but it was more about pretty much everything else. Driving around even slowly made you feel like you was going fast. I'm so glad I decided to do this! I think the MPPSK saved me from selling the car because it allowed me to drive semi sensibly but still feel like I was driving a monster.



August 2018: DMS DAY
I call this day "DMS DAY". The car was taken to DMS in Southampton where my car became the first ECU mapped B58 F31. Not just by DMS, it was the first F31 that had an ECU map. The car came alive and I loved it but it just reinforced the desire for more and more power. This was a custom Stage 1 map that logged 444bhp





Jan 2019: DMS are big fat liars!
Everyone always claim that DMS dyno numbers are super happy and are a pile of poo. My car logged 444.6bhp when I was at DMS having the map put on the car so when I had a chance to meet up with some friends at Surrey Rolling Road I took the car to see what Charlie had to say about it. The car logged 454bhp whilst running on Asda's finest cheap fuel. Back then I was a bit of an idiot with fueling and didnt care about logs or anything I just mashed my foot and hoped for the best. I never imagined I'd had spreadsheets showing what ethanol content I was running and having logs to show pretty much every parameter of the car.
[pic]http://www.chrisc.co.uk/f31/bmw10.jpg



September 2020: Power and NOISE!
I decided enough was enough and the car needed more power and more noise so I swapped over to BootMod3 and grabbed myself a 200cel downpipe. I tried their stage 1 map which was quicker than the DMS map in every metric and then jumped onto their stage 2 map. A day later I put XHP Stage 3 on the car to make sure the gearbox took a beating.




October 2020: ZF time
Talking about the gearbox taking a beating I decided to take some routine maintenance and get the gearbox serviced at Endless Autoworks. The co-owner has a bloody quick M140 and gave the gearbox an oil change and stuff felt a bit smoother after.



Late October 2020: Stage 2+ - TU Fuel pump
I was desperate to try E30 on the car and decided to grab a TU fuel pump. The stg2 -> stg2+ times were not that different, yes you could feel it a bit but it wasn't £500 worth of improvements. The real improvements came when you whacked some ethanol into the tank and the car turned into a stupid machine. Holy hell I loved the first try of ethanol. Highly highly addictive! Every fill up required careful logging of how much fuel was left in the tank, how much fuel was put in and I was paying attention to the ethanol content of each fill up so I could run the car correctly.




November 2020: STOP!
All of this extra power from the ethanol meant that the car needed help stopping. I needed to swap out the brakes! New discs and pads all round.



December 2020: It's hot!
I know it's winter but I saw the 'Hot climate mod' and decided to fit it to the car. It probably made zero difference but why not! To me it seemed worthwhile. Whilst I was at it I installed a Williams Performance silicone intake pipe. I doubt it makes the car any faster but you can hear the noises more which was why I fitted it.






Feb 2021: "The MaxChem disaster"
I'd been getting through a lot of ethanol and decided to try another brand that looked really good. After a few litres the car literally shat itself. It was dog rough and it wasn't happy. It turned out that it destroyed my low pressure fuel pump. I had the car drained and sucked up the cost. I know of at least 5 other cars that had lpfp failures due to this fuel. It really wasn't what I wanted as I knew I had my car booked in for the BIG SWAP in just a few weeks.


March 1st 2021: Stage 3!
I took at trip to see Marc @ Williams Performance in Newcastle to take my car to the next level. I left the house at 3AM because it was a long drive but worth it. My phone claimed I'd arrive with him at 07:59 and 331 miles and 4 and a smidge hours later I turned up at his garage. I decided on the Pure800 turbo and the Dorch Stage 2 fuel pump. Annoyingly the Dorch wasn't in the UK on the day I drove to get the turbo fitted so I had to drive back with the Pure800 working alongside the TU pump on BootMod3. By 3pm I was on my way home to see how sensible I could be.
The car felt a lot quicker already and this was whilst running a BM3 Stg2+ OTS map. I had a few fun encounters on my way home but this was nothing compared to what was coming. At 20:30 I arrived home after 17hours and something like 11-12hours driving. The car averaged about 38mpg over the 670 or so miles including "running the turbo in".


More power followed when I swapped the TU pump out for the Dorch Stg2 pump and I moved over to MG Flasher. I wasn't pleased with how the car drove on MG with an OTS map obviously and was desperate to find a tuner. I had issues but eventually settled down with Kirill AKA OdinTuned. He worked his magic on my car and I was running faster times on plain pump fuel than I was running on E30 before.
https://youtu.be/B-8vBJAh-1U







Mid March 2021: STOP AGAIN!
Fast forward a few weeks and I realised that the car was simply too fast for M4 pads so I moved over to Ferodo DS2500's. What a huge difference these made. I've still got the same discs as before but these pads allow the car to stop so much quicker.



April 2021: BIRDS!
The car was simply too much to handle on the country lanes and at it's age it really needed a bit of love in the bouncy bouncy department. The guys at Birds sorted me out with a Quaife LSD and their suspension package. The car drove home like a brand new and different car. It didn't crash over bumps and it just felt so much more nimble. I could actually let loose all of the power I'd been running.




July 2021: Santapod failure
I had a crap time at Santa Pod. The map wasn't running right and the car was slow but it looked good there. I've been to a local garage numerous times and jumped on their dyno a few times to check everything was where it should be.


[youtube]https://youtu.be/HperznTKAIU[/youtube[


October 2021: Stage 3 and a bit!
Well it has come to the time when I wanted more reliable power so I purchased a port methanol setup. Pushing for port methanol with either pump fuel or E30 for those crazy times should make the car quicker than on E35 before and it should
help with engine temperatures.




Edited by ChrisC-Berks on Sunday 6th February 16:20


Edited by ChrisC-Berks on Sunday 6th February 16:23


Edited by ChrisC-Berks on Sunday 6th February 16:24


Edited by ChrisC-Berks on Sunday 6th February 17:12

ChrisC-Berks

Original Poster:

93 posts

91 months

Sunday 6th February 2022
quotequote all
Placeholder.It continues:

As per the first post I decided to get the William's Port Meth and a lovely Torqbyte controller. The controller is complex but it should give me the flexibility to control everything I need when the time comes.

I visited Chris @ Opsrey Performance who built me a completely custom intake and a catch can. Both of which are currently in development but even this "version 1" in my car oozes quality.




We then started with the Meth install. We ran the meth line from the boot to the front and left it secured because we knew we'd not complete the job that day. Set up the meth tank with a low level float sensor and called it a day


Whilst waiting for the meth plate to arrive I decided it made sense for me to wire up as much as I could to save time when it came to actually installing the rest of the setup. I wanted to hide everything as much as possible but also make it easy to remove as and when the time comes. I tried to follow the loom from the battery and then run the power out under the floor flap.


I removed the carpet and realised that you could feed the meth pipe and power down the opposite side and a small hole enabled the wires to come out with the tank and remain hidden.
[pic]http://www.chrisc.co.uk/f31/bmw106.jpg


The meth controller sits very nicely here with all wires going securely under the flap to be held out of the way. I've got access to the controllers USB port for changing settings.


But when I want to do the shopping or go out with the family it's all hidden away and no one would ever know it's there.



First off I got out my printed sheet to remind me what I was doing and where the wires went. Oh yeah, had to take off the intake and catch can


The threads on the meth plate were not clean and had lots of metal from machining still in them. Had to re-tap the thread so I didnt get any crap in the engine.


Hey presto the manifold is out. Top tip, disconnect the coolant line from the top of the low temp coolant system and use a pump to push coolant out of the coolant line. We managed to get 1.6L out of the manifold so it didnt leak everywhere. Oh and unclip the coolant hose from the front of the car near the headlight or you'll have hell getting the manifold out. We didn't which is why we know about unclipping it now!


Manifold sitting pretty



Custom fabricated a mounting plate for the meth distribution thing. Sits nicely onto the ecu box and everything is secure.


The plate is on and plumbed in. Another top tip, DONT test spray whilst its actually on the engine or you'll end up with water (I was testing with water) in the engine and you'll have to do a crank over without plugs... grr!


The manifold is now sitting up and out a bit more so we had to fabricate a couple of risers to hold the manifold up. Some people dont bother and just let it sit how it does, others make other solutions. This was ours.


It all went back together and many swearwords were said at how awkward the coolant pipes were! The car was topped up, bled and ready for everything else to go back on.
Chris (Mr Osprey!) made some funky connectors for the catch can so you could use the standard pcv clips. These aren't sold anywhere and he makes them in house.


This means that when the new catch can is back on the car it looks OEM almost with how neat the pipes are


I don't have my intake lid as he is busy making me a modification to it but it all sits in here nicely and the engine bay looks a bit funkier. Currently settin the car up but it's got a switch in the arm-rest to turn off the meth if needed, a LED above the cup holder to let me know if I'm running out of meth and I can swap from pump to pump+meth within about 5seconds due to MG Flashers map switching on the fly


After mapping with HLC performance it's now running the fastest 60-130 time for the F31 by about 100th of a second but I'll take it as a win

There were a few changes to the intake system as below:





Recently (Feb 2022) I swapped out the alloys from stock to some 2Forge Z6's and it's now sitting on 275mm MP4S's rear and 245 MP4S's at the front.






Dragy stats are as below:





Edited by ChrisC-Berks on Sunday 6th February 16:47

RacingPete

9,072 posts

220 months

Sunday 6th February 2022
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Brilliant - great write up, I’m in Wokingham so I think you are local and will keep an eye out for it on the roads. Also might speak to the editorial team to see if there is some article we can do comparing F31s with Matt’s 335, my 340 and your rocket ship.

ChrisC-Berks

Original Poster:

93 posts

91 months

Sunday 6th February 2022
quotequote all
To escape the wall of text in my previous posts the key things about the car at the moment:

Quaife LSD
Birds Suspension
2Forge ZF6 Alloys
MPPSK Exhaust + VRSF 200cel downpipe


Dorch Stg2 fuel pump
Pure800 turbo
Williams Performance port meth

Tuned by Aiman @ HLC Performance
Previously tuned by Kirill @ OdinTuned
Tuning platform = MG Flasher

JAMSXR

1,783 posts

63 months

Sunday 6th February 2022
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Fair play, you’ve gone to town on that! I loved my 340i estate, although the MPPSK cold start was a little obnoxious smile

I watched some of your early videos for some sound inspiration before I pulled the trigger - thanks!

ChrisC-Berks

Original Poster:

93 posts

91 months

Sunday 6th February 2022
quotequote all
RacingPete said:
Brilliant - great write up, I’m in Wokingham so I think you are local and will keep an eye out for it on the roads. Also might speak to the editorial team to see if there is some article we can do comparing F31s with Matt’s 335, my 340 and your rocket ship.
My "berks" tag was from when I lived in reading a couple of years back. I'm actually living in Kent now so you wont be seeing my car any time soon unless I'm visiting friends that way.

The car should be on one of the populare youtube car channels in the next few weeks though but if anyone wants to chat/play with the car I'm up for that. Always happy to have a natter and compare what's what.

JAMSXR said:
Fair play, you’ve gone to town on that! I loved my 340i estate, although the MPPSK cold start was a little obnoxious smile

I watched some of your early videos for some sound inspiration before I pulled the trigger - thanks!
I turned off cold start the moment I got the 200cel downpipe. It was annoying with the MPPSK but obnoxious with the 200cel.

Edited by ChrisC-Berks on Sunday 6th February 17:14

okenemem

1,408 posts

210 months

Sunday 6th February 2022
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this the first build post ive read from start to finish, lovely car . i think the thing i love the most about it is the standard look . the average eye couldnt tell its a monster

bolidemichael

16,611 posts

217 months

Sunday 6th February 2022
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I'm in from the 'Fast Estates' thread. I honestly have little clue as to what is going on, but I'm amazed and pleased that you're still doing what we'd all try and do to our cars back in the day.

ChrisC-Berks

Original Poster:

93 posts

91 months

Sunday 6th February 2022
quotequote all
bolidemichael said:
I'm in from the 'Fast Estates' thread. I honestly have little clue as to what is going on, but I'm amazed and pleased that you're still doing what we'd all try and do to our cars back in the day.
To keep it super simple:
Wolf in sheeps clothing
700hp+
Full fat family wagon that gets used as the family daily car
Quicker than an M5 or a 911 on the roll.

She doesn't get off the line well but once moving doesn't hang around

Edited by ChrisC-Berks on Sunday 6th February 19:39

Court_S

14,345 posts

193 months

Sunday 6th February 2022
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Wow, that’s had sone work done to it! Not much room in that engine bay….and I moaned about access in and around my N52!

McGee_22

7,553 posts

195 months

Sunday 6th February 2022
quotequote all
ChrisC-Berks said:
bolidemichael said:
I'm in from the 'Fast Estates' thread. I honestly have little clue as to what is going on, but I'm amazed and pleased that you're still doing what we'd all try and do to our cars back in the day.
To keep it super simple:
Wolf in sheeps clothing
700hp+
Full fat family wagon that gets used as the family daily car
Quicker than an M5 or a 911 on the roll.

She doesn't get off the line well but once moving doesn't hang around

Edited by ChrisC-Berks on Sunday 6th February 19:39
Not a tuner or dedicated tuner fan but without special fuel and other injected fluids what is the power output, say normal 97 or 99 Super?

Edit; Does it run on normal pump petrol?

ChrisC-Berks

Original Poster:

93 posts

91 months

Sunday 6th February 2022
quotequote all
McGee_22 said:
Not a tuner or dedicated tuner fan but without special fuel and other injected fluids what is the power output, say normal 97 or 99 Super?

Edit; Does it run on normal pump petrol?
The car is actually set up to "multi-map" switch from (1) Pump, (2) Pump + Meth, (3) Pump + Meth + More, (4) BMW MPPSK map. Just hold a button on the steering wheel, tap another button and it changes map on the fly. You can also switch the meth on / off with a switch in the arm rest.

As for power, these are going to be guessed numbers based on times I've ran running different maps that have been on the dyno...

97 = yuck. It'll run on it but it probably wont be happy. I wouldn't even guess what power it makes as I wouldn't subject the car to being driven hard like this.

99 on it's own with no meth is fine, it'll be about 580-600hp.. Lots would claim >600hp but I'm trying to be realistic. These cars LOVE octane.

E30 fuel is fun but expensive, annoying to mix. This was running 30psi, right at the limit and calculated to be >710hp. The map was really pushing that fuel. - the high power ethanol map was E37 on the dyno.

99+ meth = far happier and I'd guess around the 700 mark.

I ran a 6.1sec 100-200 on an ethanol blend that was >710hp and I'm running 5.7sec 100-200's on port meth. I'd guess it's also into the 700s but at the moment I don't have any desire to go on the dyno just to get a number that means nothing. Maybe when it's a bit warmer and I turn the power up again I'll get a dyno run.

Because the meth tank is large I find I've always got meth in the tank so it's easy to just run it with meth all the time. The car only sprays meth above a certain RPM / boost point so you can cruise around and just use pump fuel until you're flooring it then a little flashing light by my foot reminds me the meth is spraying.

My fuel choice preferences are Esso E0 (#1), Tesco Momentum (#2) and then if Shell is the only option V-Power but the car will gladly do 35mpg on a run so unless I'm thrashing it I can cover a fair distance on a tank and not need to worry about finding a petrol station quickly. On ethanol blends like the E30 map you noticed that fuel guage drop REALLY QUICKLY so you'd be looking for fuel a lot quicker and faffing around with mixing fuel.

Edited by ChrisC-Berks on Sunday 6th February 20:59

joshcowin

7,151 posts

192 months

Sunday 6th February 2022
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I love this! Keep us posted on what you do with it!! I am also in Kent btw you aren't local to Faversham are you, I recognise one of your pic locations

One of the first things I saw on PH was a pasat with an rs6 engine in it this is similar levels of bonkers, good work.

Macron

11,961 posts

182 months

Sunday 6th February 2022
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This is insanely brilliant!

Xcore

1,406 posts

106 months

Sunday 6th February 2022
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Impressive build and figures! That is one ugly engine without the cover on!

RJH777

212 posts

58 months

Monday 7th February 2022
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That's just epic mate - love the idea of some lad in his RS3 trying it on with a grey BMW wagon and then just being left for dead.

BrabusMog

21,027 posts

202 months

Monday 7th February 2022
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Spectacular! Shame you're not around Berks any more biggrin

ChrisC-Berks

Original Poster:

93 posts

91 months

Monday 7th February 2022
quotequote all
BrabusMog said:
Spectacular! Shame you're not around Berks any more biggrin
Seems hardly anyone round this way wants to play frown

I think I've hurt the feelings of a few "proper" cars with the family car with the tow bar out. One night a 911 Turbo got shown the tail lights and he was not amused. Another time I was messing around with a buddy in a M140 and a F90 M5 came along to clearly show us up. I got given a very odd wave by him when I made him look silly.

Had a few M3's and M4's play. Some like it and I get thumbs up and beeps but others just seem peed off at what's happened.

ChrisC-Berks

Original Poster:

93 posts

91 months

Monday 7th February 2022
quotequote all
Court_S said:
Wow, that’s had sone work done to it! Not much room in that engine bay….and I moaned about access in and around my N52!
I thought the engine bay was quite spacious whilst working on the intake, downpipe or other stuff you've got plenty of room if you want it.

Xcore said:
Impressive build and figures! That is one ugly engine without the cover on!
I quite like the look without the engine cover on personally. It doesn't fit very well due to the manifold being lifted up by the port meth plate. I left it off for most of the summer due to engine temperatures but only recently forced it back on.

joshcowin said:
I love this! Keep us posted on what you do with it!! I am also in Kent btw you aren't local to Faversham are you, I recognise one of your pic locations
One of the first things I saw on PH was a pasat with an rs6 engine in it this is similar levels of bonkers, good work.
I'm assuming you mean the ones of the sunset and yes, that's taken not far from my house in Bapchild. All of the other photos that aren't at garages are on my driveway.

The plans for this year are to hit a 10second 1/4 mile at Santa Pod. I'm hopeful the new rubber will help here but if it doesn't there are a few plans which get considerably more expensive. In the order of what is going to be tested (and yes, it's cheapest to most expensive).

1) Try as it is and hope for grip. I might get lucky and break the 10's without any more effort.
2) Turn up the power. I'll probably do this anyway.
3) Swap to drag tyres and risk the driveshaft
4) If it launches ok with drag tyres swap the gearbox into drag mode. This will probably knacker the gearbox and will probably kill the box after 1 or 2 runs
5) Swap gearbox out for the same and try again if close. Hopefully /\ will have got me my 10sec so I can just swap box and leave as is.
6) Swap gearbox for model from the diesel variant to allow more torque.

Edited by ChrisC-Berks on Monday 7th February 11:44

Terra1

266 posts

127 months

Monday 7th February 2022
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Love this! Im shocked at the power you can get out of that engine on stock internals. It wasn't that many years ago that you'd need to strengthen/upgrade engine parts to get 400bhp+ on a 'standard' (non-M/R/AMG) model.