[JoeCav]

Hey all,

I tried my best to find a definitive answer on these forums for the following, but answers are all over the place.

That said, I will copy and paste my question to Bootmod3 and answer received by them. Any input from this community is greatly appreciated.

My question:

"I am considering an ecu tune for my 2016 328i n26. I am considering a very conservative tune of +2 or 3 psi over stock so that I don’t have to worry too much about premature internal engine component wear or installation of required bolt-ons such as intercoolers, downpipes, etc.

I see that BM3 is a very popular ecu flash platform. You have a couple of maps that I am interested in. You list (I believe) 3 conservative OTS maps – stage 1 93, stage 1 91, and stage 1 91 ACN. What is the approximate boost increase for the 3 maps?"

Their answer is as follows:

"Thank you for reaching out to us. The boost target for those maps is around 17-19psi."

Thoughts?

Thanks again!

[kahnfucious]

Originally Posted by JoeCav

Hey all,

I tried my best to find a definitive answer on these forums for the following, but answers are all over the place.

That said, I will copy and paste my question to Bootmod3 and answer received by them. Any input from this community is greatly appreciated.

My question:

"I am considering an ecu tune for my 2016 328i n26. I am considering a very conservative tune of +2 or 3 psi over stock so that I don't have to worry too much about premature internal engine component wear or installation of required bolt-ons such as intercoolers, downpipes, etc.

I see that BM3 is a very popular ecu flash platform. You have a couple of maps that I am interested in. You list (I believe) 3 conservative OTS maps – stage 1 93, stage 1 91, and stage 1 91 ACN. What is the approximate boost increase for the 3 maps?"

Their answer is as follows:

"Thank you for reaching out to us. The boost target for those maps is around 17-19psi."

Thoughts?

Thanks again!

Originally Posted by JoeCav

Hey all,

I tried my best to find a definitive answer on these forums for the following, but answers are all over the place.

That said, I will copy and paste my question to Bootmod3 and answer received by them. Any input from this community is greatly appreciated.

My question:

"I am considering an ecu tune for my 2016 328i n26. I am considering a very conservative tune of +2 or 3 psi over stock so that I don't have to worry too much about premature internal engine component wear or installation of required bolt-ons such as intercoolers, downpipes, etc.

I see that BM3 is a very popular ecu flash platform. You have a couple of maps that I am interested in. You list (I believe) 3 conservative OTS maps – stage 1 93, stage 1 91, and stage 1 91 ACN. What is the approximate boost increase for the 3 maps?"

Their answer is as follows:

"Thank you for reaching out to us. The boost target for those maps is around 17-19psi."

Thoughts?

Thanks again!

I have been told that stock is 16 psi and so 91 octane stage 1 should give you what you want. 93 octane goes above what you are looking for. ACN (Arizona, California, Nevada) are apparently bad gas states - from their website.

Does that help?

[JoeCav]

Originally Posted by kahnfucious

I have been told that stock is 16 psi and so 91 octane stage 1 should give you what you want. 93 octane goes above what you are looking for. ACN (Arizona, California, Nevada) are apparently bad gas states - from their website.

Does that help?

Sort of.

The reason for my confusion stems from what was told to me by a particular mechanic. He stated that stage 1 BM3 adds 4-5 PSI of boost. Seeing as stock boost for the n20 is (I believe)16-17, I thought his estimate was a hair high. Similarly, I was surprised to see a target boost of 17-19 given to me by PTF, considering 17 is nearly identical to the stock boost target.

I feel like I am missing something here.

Just trying to learn!

[kahnfucious]

Originally Posted by JoeCav

Sort of.

The reason for my confusion stems from what was told to me by a particular mechanic. He stated that stage 1 BM3 adds 4-5 PSI of boost. Seeing as stock boost for the n20 is (I believe)16-17, I thought his estimate was a hair high. Similarly, I was surprised to see a target boost of 17-19 given to me by PTF, considering 17 is nearly identical to the stock boost target.

I feel like I am missing something here.

Just trying to learn!

Originally Posted by JoeCav

Sort of.

The reason for my confusion stems from what was told to me by a particular mechanic. He stated that stage 1 BM3 adds 4-5 PSI of boost. Seeing as stock boost for the n20 is (I believe)16-17, I thought his estimate was a hair high. Similarly, I was surprised to see a target boost of 17-19 given to me by PTF, considering 17 is nearly identical to the stock boost target.

I feel like I am missing something here.

Just trying to learn!

I'll try to log it - tomorrow

[RMachuca3d]

Thats peak boost, which is slightly higher than stock on stage1, the difference is that you get more time on higher boost through the rev range vs stock mapping

[pierreye]

n20 Stage 1 Oct 91 here and based on my log the target is 20.8 psi for WOT. You will exceed the target boost sometime and the max I see is around 21.5 psi. Read on some thread regarding stock internals for N20 should be OK to handle up to 23 psi.

[JoeCav]

Originally Posted by RMachuca3d

Thats peak boost, which is slightly higher than stock on stage1, the difference is that you get more time on higher boost through the rev range vs stock mapping

This makes a lot of sense.

Originally Posted by pierreye

n20 Stage 1 Oct 91 here and based on my log the target is 20.8 psi for WOT. You will exceed the target boost sometime and the max I see is around 21.5 psi. Read on some thread regarding stock internals for N20 should be OK to handle up to 23 psi.

Thanks for letting me know what you are experiencing.

[DadzBmer_N2o]

Yeah the most so far that i see at 100% throttle angle around 5500-5700 rpm's is 18lbs of boost on stock stage 1 - 93

[kahnfucious]

Originally Posted by DadzBmer_N2o

Yeah the most so far that i see at 100% throttle angle around 5500-5700 rpm's is 18lbs of boost on stock stage 1 - 93

Hmm...maybe I'm doing this wrong but I am on the 91 OCT OTS map and saw max of 22.5 psi - is this correct?? [IMG][/IMG][IMG][/IMG]

[DadzBmer_N2o]

Originally Posted by kahnfucious

Hmm...maybe I'm doing this wrong but I am on the 91 OCT OTS map and saw max of 22.5 psi - is this correct?? [IMG][/IMG][IMG][/IMG]

I think those maps are the target max boost range, but someone on here hopefully can chime in on that, i am just a newbie to these twins lol..That post is my what my boost is showing in real time..

[pierreye]

Originally Posted by kahnfucious

Hmm...maybe I'm doing this wrong but I am on the 91 OCT OTS map and saw max of 22.5 psi - is this correct?? [IMG][/IMG][IMG][/IMG]

Are you looking at MAP? What's your boost target?

[JoeCav]

Thanks for the responses guys.

I'm on the fence about running the stage 1 OTS tunes.

I'd like to see more logs indicating how the tunes set target boost, MAP response to said target, AFRs, and throttle cut-off when overboost is detected.

I'm probably overthinking things, but this is where I'm at!

[rjd_F30]

Stage 1 OTS is a very safe tune, you have nothing to worry about running it, or even running stage 2 for that matter. I've been on Stage 2 for around 15k miles and my blackstone oil analysis came back showing below average wear metals for my car's mileage (87k).

To answer your questions though:

Stage 1 93 targets 19psi at the MAP at peak rpm which is about 5500rpm.
Stock targets about 17.
Stage 2 targets about 22.

[DadzBmer_N2o]

And honestly, if you wanna play it real safe and save ur pocket money, you could get the plug n play: BMS - JB+. Its supposed to give you about 25-35hp's for only about $200-300 ish.

[JoeCav]

Originally Posted by DadzBmer_N2o

And honestly, if you wanna play it real safe and save ur pocket money, you could get the plug n play: BMS - JB+. Its supposed to give you about 25-35hp's for only about $200-300 ish.

I've been thinking about this as well. Correct me if I am wrong, but piggybacks are reactivate, in that the ECU makes adjustments based on the input values the piggyback is creating, whereas a true tune is proactive, in that the ECU knows what is coming?

It would seem a true tune is the better course of action, yes?

As a follow up question, is there any advantage of running 93 octane on a 91 octane tune, say from a knock/timing perspective?

Sorry, I didn't even know what Bootmod3 was 2 weeks ago. I'm just learning here!

[DadzBmer_N2o]

Originally Posted by JoeCav

I've been thinking about this as well. Correct me if I am wrong, but piggybacks are reactivate, in that the ECU makes adjustments based on the input values the piggyback is creating, whereas a true tune is proactive, in that the ECU knows what is coming?

It would seem a true tune is the better course of action, yes?

As a follow up question, is there any advantage of running 93 octane on a 91 octane tune, say from a knock/timing perspective?

Sorry, I didn't even know what Bootmod3 was 2 weeks ago. I'm just learning here!

Yes, but both are safe to use, especially BM3 in Stage 1. Price wise, the JB+ is half the cost of the BM3, i know this cos i've had both and now i have the BM3. The only downside to the JB+ is, its not very smooth and kicks in above the +3.5-4k ranges, as far as the 91 vs 93, the HP's diff isn't much maybe less than 5-7hp's. There shouldn't be any knocking on either tune, just depends on where u live and brands of gas your using (for me i use only Top Tier) in all my other cars as well, nvr had stalling issues even on my 2008 Pilot. If you live on the East Coast like i do, use the 93 tune (we have the best quality gas in the country here, lol), if your out more towards the Left Coast, use either the 91 or 91 ACN tune, but take this info with a grain of salt, i am not an engineer by any means..

[Z K]

If you want to be real conservative, you can run the ACN 91 tune and use 91 or 93 octane. It's designed for the crap gas we get out in California but it'll work fine for higher octane.

ACN 91 is the most conservative tune you can get with BM3 but it is still way faster than a Dinan Sport plug in.

[DadzBmer_N2o]

Originally Posted by Z K

If you want to be real conservative, you can run the ACN 91 tune and use 91 or 93 octane. It's designed for the crap gas we get out in California but it'll work fine for higher octane.

ACN 91 is the most conservative tune you can get with BM3 but it is still way faster than a Dinan Sport plug in.

My car ran like crap on that ACN tune here on the East Coast on 93

[Z K]

Originally Posted by DadzBmer_N2o

My car ran like crap on that ACN tune here on the East Coast on 93

Ran like crap as in not much power or ran like crap because it was causing pinging?

[DadzBmer_N2o]

Originally Posted by Z K

Ran like crap as in not much power or ran like crap because it was causing pinging?

It was hesitating here and there with a rougher idle (rpms dipping and going back up)..i ran this tune for less than a week and flashed it back to my 93, don't have those conditions anymore.

[Z K]

Originally Posted by DadzBmer_N2o

It was hesitating here and there with a rougher idle (rpms dipping and going back up)..i ran this tune for less than a week and flashed it back to my 93, don't have those conditions anymore.

Strange, I never had any issues. I pumped a few gallons of 100 octane to bump the octane up above 93 octane for fun and the ACN91 stage 1 tune still ran fine.

[Kel918]

If your going to go with a bm3 conservative tune, you might as well go with the bms Jb+ It’s only $199 brand new and you can add 3-4 psi over stock. I think it’s the best mod for the money