N20 Tuning: flashing 320i/420i to 328i/428i specs

rednose · 06-18-2015, 06:37 AM

Quote:

Originally Posted by x328x

Hey

I am about to pull the trigger on a piggy back. still looking into the other brands.

Please put a review up if you can. I don't want to hijack thread so ill just wait for your thread

As soon as I get it on the dyno I'll post results, seat of the pants says it is quicker but will have more of an indication once it hits the dyno.

I believe its still in closed loop so it shouldn't affect anything but will compare power and Afr with and without the piggy back.

rednose · 06-19-2015, 02:05 AM

Quote:

Originally Posted by x328x

Hey

I am about to pull the trigger on a piggy back. still looking into the other brands.

Please put a review up if you can. I don't want to hijack thread so ill just wait for your thread

Dyno sheet is up.

http://f30.bimmerpost.com/forums/sho...5#post18116185

etclam · 08-17-2015, 09:01 AM

Hi Stuart,

Interested to know what up take you have for the 28 tune...

Cheers
Ed

F36420I · 09-23-2015, 07:36 AM

Hello

here is the only difference betwen 3/420i and 3/428i

All other parts are the same

Stuart@BMRAutowerkes · 05-23-2016, 07:32 PM

bump on this as I've updated the title of the post to be a bit more accurate/relevant

Flash tuning the 320i/420i is by far the best upgrade out there

evobda2 · 05-24-2016, 03:32 AM

Out of curiosity have you run into any of the gearbox safeguard problems on the 320i when the torque is raised substantially? Some others (be it overseas) have had this problem after add on type tune boxes etc. Or does your tune address this issue as well?

Hpwbot · 05-28-2016, 01:13 AM

Quote:

Originally Posted by Stuart@BMRAutowerkes

bump on this as I've updated the title of the post to be a bit more accurate/relevant

Flash tuning the 320i/420i is by far the best upgrade out there

Hi Stuart, can you please give me a quote on flashing my 320i to a 28 tune? I am located in Melbourne, do you know who could do it for me down here?

Thanks

Stuart@BMRAutowerkes · 06-02-2016, 03:12 AM

Quote:

Originally Posted by evobda2

Out of curiosity have you run into any of the gearbox safeguard problems on the 320i when the torque is raised substantially? Some others (be it overseas) have had this problem after add on type tune boxes etc. Or does your tune address this issue as well?

Sorry for the late reply, haven't encountered any issues with reaching torque limiters on the gearbox. When tuning all cars are dyno'd and the torque curves are all smooth and show the gains we expect

Quote:

Originally Posted by Hpwbot

Hi Stuart, can you please give me a quote on flashing my 320i to a 28 tune? I am located in Melbourne, do you know who could do it for me down here?

Thanks

PM sent

Stuart@BMRAutowerkes · 06-02-2016, 03:13 AM

Couple more N20 results from this week

F20 125i Stock: 149rwkw, Tuned: 179rwkw, gain of 30kw & 20%

F30 320i Stock: 114rwkw, Tuned: 174rwkw, gain of 60kw & 52%

evobda2 · 06-02-2016, 04:58 AM

PM me a price too please Stuart. Its for 2014 320i

brianpalvarez · 04-09-2019, 09:16 AM

Hi Stuart, thanks for the update. I am also interested in pricing as well as warranty info. Please PM me as well!

Thanks!

combivan · 04-13-2019, 08:12 AM

Quote:

Originally Posted by Stuart@BMRAutowerkes

So far we have not been able to identify any hardware differences between the two.

330i_sportshadow · 12-04-2019, 03:12 PM

Quote:

Originally Posted by Stuart@BMRAutowerkes

Super exciting news for all 320i / 420i owners!! (and anyone else with a detuned N20 engine)

As you may/may not know the 320i runs an N20 engine with flywheel engine outputs of 135kw/270nm.
The 328i makes 180kw/350nm. So far we have not been able to identify any hardware differences between the two.

We're pleased to announce we can flash the 320i to 328i levels and then some

At the same time we can tune the 328 with a proper flash tune, although the gains are less as we are obviously starting in a higher state of tune.

We are offering two levels of tunes:

- the '28' tune; and
- the '28+' tune

The 28 tune is designed to take the 320i to 328i levels of power. At this level the car will perform the same as a standard 328i (which is no slouch!). The fuelling, boost and ignition mapping is virtually identical to a 328i.
The 28+ tune is designed to take it one step further, similar to what a tuned 328 would be.

Dyno numbers from a 420i

Stock 420i: 117.5kw
28+ tuned 420i: 172.9kw

For comparison, a stock 328 will make approx 155kw on this dyno and 172kw tuned. Here is a 328 with JB4 dyno sheet I posted up a while ago:

How does it drive?
Brilliantly! I have driven stock 320s and 328s, and both models with JB4s and the flash tuned vehicles drive noticeably smoother and better than the JB4.
That's not to discount the JB4 though - it's still a brilliant unit that offers excellent bang for buck, and you wouldn't pick the difference unless you had driven both back to back.
One advantage the flash tune has over the JB4 comparing the dyno sheets above is the flash tuned 420i will hold power and torque up top better, whereas the JB4 tends to fall away.

Next steps
We are hoping to do a downpipe/intake combo on the 320i/420i combined with the 28+ tune to see if it gives similar results to what we would see on tuned 328i/428i (around 195rwkw)

Pricing
please refer to the BMR website *link to be provided shortly*

At the end of the day this is a fantastic upgrade for any 320i/420i owner, particularly those who may have wanted the 328i/428i in the first place, but ended up with a 320i/420i whether due to availability or lower purchase price. Now 320s and 420s no longer need to miss out on that extra power enjoyed by their bigger brothers

So I own the 420i EUR 2016 (n20) and planning to do this

downpipe upgrade with sport cat
FMIC.

However, the FMIC I am trying to buy is from US, and made for 428i. based on your message there are no hardware differences so 428i FMIC should fit 420i as long as both are using n20?

330i_sportshadow · 12-04-2019, 03:15 PM

Quote:

Originally Posted by combivan

That's true, that's why I am asking the question on the previous post. I saw part number and wheight differences.

What I am thinking is that maybe part numbering is different considering that versions are EUR and US?

brianpalvarez · 05-07-2020, 11:22 AM

Quote:

Originally Posted by Stuart@BMRAutowerkes

Super exciting news for all 320i / 420i owners!! (and anyone else with a detuned N20 engine)

As you may/may not know the 320i runs an N20 engine with flywheel engine outputs of 135kw/270nm.
The 328i makes 180kw/350nm. So far we have not been able to identify any hardware differences between the two.

We're pleased to announce we can flash the 320i to 328i levels and then some

At the same time we can tune the 328 with a proper flash tune, although the gains are less as we are obviously starting in a higher state of tune.

We are offering two levels of tunes:

- the '28' tune; and
- the '28+' tune

The 28 tune is designed to take the 320i to 328i levels of power. At this level the car will perform the same as a standard 328i (which is no slouch!). The fuelling, boost and ignition mapping is virtually identical to a 328i.
The 28+ tune is designed to take it one step further, similar to what a tuned 328 would be.

Dyno numbers from a 420i

Stock 420i: 117.5kw
28+ tuned 420i: 172.9kw

For comparison, a stock 328 will make approx 155kw on this dyno and 172kw tuned. Here is a 328 with JB4 dyno sheet I posted up a while ago:

How does it drive?
Brilliantly! I have driven stock 320s and 328s, and both models with JB4s and the flash tuned vehicles drive noticeably smoother and better than the JB4.
That's not to discount the JB4 though - it's still a brilliant unit that offers excellent bang for buck, and you wouldn't pick the difference unless you had driven both back to back.
One advantage the flash tune has over the JB4 comparing the dyno sheets above is the flash tuned 420i will hold power and torque up top better, whereas the JB4 tends to fall away.

Next steps
We are hoping to do a downpipe/intake combo on the 320i/420i combined with the 28+ tune to see if it gives similar results to what we would see on tuned 328i/428i (around 195rwkw)

Pricing
please refer to the BMR website *link to be provided shortly*

At the end of the day this is a fantastic upgrade for any 320i/420i owner, particularly those who may have wanted the 328i/428i in the first place, but ended up with a 320i/420i whether due to availability or lower purchase price. Now 320s and 420s no longer need to miss out on that extra power enjoyed by their bigger brothers

Totally interested! Please email me the link to see more about this tune. I purchased a 320i a year ago and would love to explore the chance to add that much HP to my 320i as a 328i would have. Let me know! brian@stage1films.com thanks!

08-17-2015, 09:01 AM	#25
etclam New Member 0 Rep 27 Posts Drives: F30 320i M-Sport Join Date: Jul 2015 Location: Sydney iTrader: (0)	Hi Stuart, Interested to know what up take you have for the 28 tune... Cheers Ed
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09-23-2015, 07:36 AM	#26
F36420I Private First Class 46 Rep 114 Posts Drives: Bmw 420I Gran Coupe Join Date: Dec 2014 Location: Belgium iTrader: (0)	Difference between 420i and 428i Hello here is the only difference betwen 3/420i and 3/428i All other parts are the same
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05-23-2016, 07:32 PM	#27
Stuart@BMRAutowerkes Major General 808 Rep 5,530 Posts Drives: a black car Join Date: Sep 2010 Location: Sydney iTrader: (3)	bump on this as I've updated the title of the post to be a bit more accurate/relevant Flash tuning the 320i/420i is by far the best upgrade out there
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05-24-2016, 03:32 AM	#28
evobda2 Private 10 Rep 51 Posts Drives: F31 M Sport Join Date: Aug 2012 Location: Sydney iTrader: (0)	Out of curiosity have you run into any of the gearbox safeguard problems on the 320i when the torque is raised substantially? Some others (be it overseas) have had this problem after add on type tune boxes etc. Or does your tune address this issue as well?
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06-02-2016, 03:13 AM	#31
Stuart@BMRAutowerkes Major General 808 Rep 5,530 Posts Drives: a black car Join Date: Sep 2010 Location: Sydney iTrader: (3)	Couple more N20 results from this week F20 125i Stock: 149rwkw, Tuned: 179rwkw, gain of 30kw & 20% F30 320i Stock: 114rwkw, Tuned: 174rwkw, gain of 60kw & 52%
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06-02-2016, 04:58 AM	#32
evobda2 Private 10 Rep 51 Posts Drives: F31 M Sport Join Date: Aug 2012 Location: Sydney iTrader: (0)	PM me a price too please Stuart. Its for 2014 320i
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04-09-2019, 09:16 AM	#33
brianpalvarez Banned 48 Rep 66 Posts Drives: 2016 F30 Join Date: Apr 2019 Location: La Puente iTrader: (0)	Hi Stuart, thanks for the update. I am also interested in pricing as well as warranty info. Please PM me as well! Thanks!
	Appreciate 0 Quote