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      03-01-2020, 07:16 AM   #1
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Which Tune To Get For The B48?

Hi,

I own a 430i which has the B48 engine. It produced 252 horsepower and I would ideally like it be in the 300 range.

It seems like Bootmod3 is the tune to go for but the website says that I will only be gaining around 14% horsepower in stage 1 for my car.

This would mean I'd only be in the high 200s and won't touch 300HP.

Do these numbers really matter in this case or will it still be worth going for Bootmod, or should I look at some other tune?

Thanks!
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      03-01-2020, 08:22 AM   #2
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The 330i isn't an ideal car for tuning as the B48 in this engine is already tuned quite a bit from the factory (it's basically the same engine as the one in 320i that's making 184hp).

Bootmod3 would be a good way to get a safe increase. Stage 2 will get you close to 300hp.
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      03-01-2020, 09:10 AM   #3
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Mgflasher is awesome for b48! I have 184 hp 20i version with st2 tune and that’s around 330 hp confirmed with logs and dragy tests. St1 would be good for 300 hp and safe at the same time! Also MGFlasher have some really nice and unique features and it’s cheaper than bm3.
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      03-01-2020, 01:24 PM   #4
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Quote:
Originally Posted by Dronamashina View Post
Mgflasher is awesome for b48! I have 184 hp 20i version with st2 tune and that’s around 330 hp confirmed with logs and dragy tests. St1 would be good for 300 hp and safe at the same time! Also MGFlasher have some really nice and unique features and it’s cheaper than bm3.
+1 I'm another happy customer with MG Flasher. Its customer service is second to none.
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      03-01-2020, 04:50 PM   #5
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what's the math for logs and draggy to determine HP? I never understood this.


I have a B46 (US version of B48) xdrive with BM3 stage 1 93 and on the Mustang dyno, it shows 233whp which is about a 20hp increase over stock. Haven't found a local non Mustang dyno to try.

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      03-01-2020, 08:24 PM   #6
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Originally Posted by jcdub View Post
+1 I'm another happy customer with MG Flasher. Its customer service is second to none.
Curious to know your gains with MG Flasher. Any dyno results?
BM3 Stage 2 91 octane on BMW 330e making about 350whp 440ft-lbs.
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      03-01-2020, 09:57 PM   #7
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i'm on B48 engine on BM3, and its been great for the past few months
stage 1 take me to around 219hp on wheel (around 266hp on crank)

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      03-02-2020, 10:58 AM   #8
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Quote:
Originally Posted by Bluef33 View Post
Hi,

I own a 430i which has the B48 engine. It produced 252 horsepower and I would ideally like it be in the 300 range.

It seems like Bootmod3 is the tune to go for but the website says that I will only be gaining around 14% horsepower in stage 1 for my car.

This would mean I'd only be in the high 200s and won't touch 300HP.

Do these numbers really matter in this case or will it still be worth going for Bootmod, or should I look at some other tune?

Thanks!
Get Bootmod3. Its safe, reliable, powerful and gives you complete control.

If you want even more power, we offer custom maps
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      03-09-2020, 04:09 AM   #9
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Quote:
Originally Posted by chowser51 View Post
what's the math for logs and draggy to determine HP? I never understood this.


I have a B46 (US version of B48) xdrive with BM3 stage 1 93 and on the Mustang dyno, it shows 233whp which is about a 20hp increase over stock. Haven't found a local non Mustang dyno to try.

I share your skepticism. I have heard of a rough correlation between an increase in MAF sensor readings and horsepower gains. But doubtful that numbers could be used to make tune judgments.

But how could draggy numbers correlate to horsepower? Too many variables like tires, temperature, road surface, etc. If a time changes by 0.1 or 0.2 seconds, it could be caused by almost anything and wouldn't correlate to a specific amount of horsepower gained.
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      03-09-2020, 06:10 AM   #10
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Quote:
Originally Posted by chowser51 View Post
what's the math for logs and draggy to determine HP? I never understood this.


I have a B46 (US version of B48) xdrive with BM3 stage 1 93 and on the Mustang dyno, it shows 233whp which is about a 20hp increase over stock. Haven't found a local non Mustang dyno to try.

Dyno numbers means nothing for me if the car doesnt performs well. 20 hp over stock 330 is verry little if you ask me. Also dyno numbers depends on dyno itself as well as on dyno operator and differs a lot from one dyno to another with the same car.
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      03-09-2020, 06:27 AM   #11
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Quote:
Originally Posted by johnung View Post
I share your skepticism. I have heard of a rough correlation between an increase in MAF sensor readings and horsepower gains. But doubtful that numbers could be used to make tune judgments.

But how could draggy numbers correlate to horsepower? Too many variables like tires, temperature, road surface, etc. If a time changes by 0.1 or 0.2 seconds, it could be caused by almost anything and wouldn't correlate to a specific amount of horsepower gained.
Ive got your point, but as i said above - dyno numbers means nothing if the car doesnt perform well. MGF st2 OTS tune proved to be powerfull and dragy numbers comfirms that. Also there were some racing against different cars wth good results for MGF st2 OTS.
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      03-09-2020, 09:41 AM   #12
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Quote:
Originally Posted by Dronamashina View Post
Quote:
Originally Posted by johnung View Post
I share your skepticism. I have heard of a rough correlation between an increase in MAF sensor readings and horsepower gains. But doubtful that numbers could be used to make tune judgments.

But how could draggy numbers correlate to horsepower? Too many variables like tires, temperature, road surface, etc. If a time changes by 0.1 or 0.2 seconds, it could be caused by almost anything and wouldn't correlate to a specific amount of horsepower gained.
Ive got your point, but as i said above - dyno numbers means nothing if the car doesnt perform well. MGF st2 OTS tune proved to be powerfull and dragy numbers comfirms that. Also there were some racing against different cars wth good results for MGF st2 OTS.
I'm just curious what the actual before and after dragy numbers were that are being taken as a confirmation of using a specific tune? I've just never heard that rational before so I'm trying to understand. Thanks.
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      03-09-2020, 10:22 AM   #13
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Quote:
Originally Posted by johnung View Post
I'm just curious what the actual before and after dragy numbers were that are being taken as a confirmation of using a specific tune? I've just never heard that rational before so I'm trying to understand. Thanks.
I have all of that data. MGF St2 ots Is about 1 full second quicker than stock 330 0-100 kph. 100-200 kph is about 5 seconds quicker, 1/4 also about 1 full second quicker.
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      03-09-2020, 07:06 PM   #14
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Quote:
Originally Posted by Dronamashina View Post
Ive got your point, but as i said above - dyno numbers means nothing if the car doesnt perform well. MGF st2 OTS tune proved to be powerfull and dragy numbers comfirms that. Also there were some racing against different cars wth good results for MGF st2 OTS.
can you send us the link of MGF ST2 OTS vs other brand remap?
curious too see the difference

if dyno numbers means nothing, then you will say dragy numbers is a solid number?
then what's the purpose of tuner and workshop spend thousand of dollars installing dyno machine and testing their tune on dyno machine? and customer spend hundred of dollars just to run on dyno?
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      03-10-2020, 02:48 AM   #15
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Quote:
Originally Posted by Luverse View Post
can you send us the link of MGF ST2 OTS vs other brand remap?
curious too see the difference

if dyno numbers means nothing, then you will say dragy numbers is a solid number?
then what's the purpose of tuner and workshop spend thousand of dollars installing dyno machine and testing their tune on dyno machine? and customer spend hundred of dollars just to run on dyno?
The purpose of dynos for tuners is marketing. Also it’s good to see power and torque graphs, but dyno numbers itself is marketing in most times in my opinion. Remember that hp numbers sells cars...)) hp numbers sells tunes as well.
I only got this 5,2 seconds 0-100 bm3 st2 for 95 octane for 330ix. My 320ix st2 OTS for 98 octane runs 4,8 most of the time with 4,7 was the best. I’ll try to find another tuned 320/330 in my city and race it...
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      03-10-2020, 04:18 AM   #16
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Quote:
Originally Posted by Dronamashina View Post
The purpose of dynos for tuners is marketing. Also it’s good to see power and torque graphs, but dyno numbers itself is marketing in most times in my opinion. Remember that hp numbers sells cars...)) hp numbers sells tunes as well.
I only got this 5,2 seconds 0-100 bm3 st2 for 95 octane for 330ix. My 320ix st2 OTS for 98 octane runs 4,8 most of the time with 4,7 was the best. I’ll try to find another tuned 320/330 in my city and race it...
the different in octane itself already provide gap in the performance gain
you can't expect octane 95 to run as good as octane 98, right?
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      03-10-2020, 04:30 AM   #17
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Originally Posted by Luverse View Post
the different in octane itself already provide gap in the performance gain
you can't expect octane 95 to run as good as octane 98, right?
yes there is a difference, but not such big. MGF st1 for 95 octane ran 5.1 for me. So its still quicker than st2 bm3 for the same octane. Also much bigger difference after 100 kph, there is arond 2 seconds gap between MGF st2 and BM3 st2 from 100 kph to 200 kph. Im not saing bm3 is a bad tune, just saing that mgf is quicker.
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      03-10-2020, 04:52 AM   #18
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Quote:
Originally Posted by Dronamashina View Post
yes there is a difference, but not such big. MGF st1 for 95 octane ran 5.1 for me. So its still quicker than st2 bm3 for the same octane. Also much bigger difference after 100 kph, there is arond 2 seconds gap between MGF st2 and BM3 st2 from 100 kph to 200 kph. Im not saing bm3 is a bad tune, just saing that mgf is quicker.
2 seconds gap is really big
but then again, it's from dragy result, which i don't know if it's true, the same thing you said for dyno number

because i believe, most of tuner (including MGF perhaps), develop their tuning on dyno machine. they will develope their tune not just based on hp and tq gain, but also the powerband across various rpm and other variables
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      03-10-2020, 05:30 AM   #19
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Quote:
Originally Posted by Luverse View Post
2 seconds gap is really big
but then again, it's from dragy result, which i don't know if it's true, the same thing you said for dyno number

because i believe, most of tuner (including MGF perhaps), develop their tuning on dyno machine. they will develope their tune not just based on hp and tq gain, but also the powerband across various rpm and other variables
For the powerband and torque curve you are right, but I’ve said it already. As for the dragy... well I like it because it shows slope, so no one cat cheat with it. Also it shows weather conditions so you can compare different results pretty objective.
Just to mention: that car with bm3 has never break 5 sec barrier, while my car consistently runs less then 5 seconds. For example yesterday I had 4,9 with around 50 kg additional weight in the car, also it was uphill. So it would be 4,8 easily if weren’t uphill.
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      03-10-2020, 07:02 PM   #20
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Quote:
Originally Posted by Dronamashina View Post
For the powerband and torque curve you are right, but I’ve said it already. As for the dragy... well I like it because it shows slope, so no one cat cheat with it. Also it shows weather conditions so you can compare different results pretty objective.
Just to mention: that car with bm3 has never break 5 sec barrier, while my car consistently runs less then 5 seconds. For example yesterday I had 4,9 with around 50 kg additional weight in the car, also it was uphill. So it would be 4,8 easily if weren’t uphill.
do you have the dragy result for BM3?
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      03-11-2020, 01:43 AM   #21
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do you have the dragy result for BM3?
Yes, above 5,2 is bm3 st2...
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      03-11-2020, 01:56 AM   #22
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Quote:
Originally Posted by Dronamashina View Post
Yes, above 5,2 is bm3 st2...
are you sure?

this is dragy for BM3 stage 1, 5.2s

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