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      06-26-2020, 10:55 AM   #1
phorge
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Stock vs. JB+ vs. bootmod3 0-100 km/h

With 2 more years left in my warranty I went ahead and installed the bootmod3 Stage 1 91 Octane OTS tune. Just could not wait that long. My car is all stock down to the last nut.

I had done a Stock vs. JB+ 0-100 km/h comparison earlier. This is an updated version with more times. Did around 120+ runs in total.

Car = 2017 BMW 330i M Sport (RWD Steptronic)
Engine = B48B20 (248 hp & 350 Nm)
Fuel = 97 RON (92 AKI)

"JB+ 1.5" means that the JB+ unit is adjusted to point between 1 o'clock and 2 o'clock on the dial. "bm3" is the shortened version of bootmod3.

The top 3 times and their averages are shown below. All times verified by Dragy.

0-100 km/h runs without launch control or brake boosting
HTML Code:
Stock	6.76	6.78	6.82 	=    6.786 s
JB+ 1.5	6.58	6.60	6.62	=    6.600 s
JB+ 2	6.42	6.47	6.53	=    6.473 s
JB+ 2.5	6.41	6.49	6.49	=    6.463 s
JB+ 3	6.47 	6.54	6.57	=    6.526 s
JB+ 4	6.31	6.34	6.41	=    6.353 s
bm3	6.09	6.15	6.19	=    6.143 s
0-100 km/h runs with launch control
HTML Code:
Stock	6.12	6.26	6.28	=    6.220 s
JB+ 3	5.87	6.00	6.36	=    6.076 s
bm3	5.74	5.80	5.89	=    5.810 s
Given that the stock 0-100 km/h time is 5.8 s under ideal conditions, I feel that a time of 5.3 s can be achieved with the bootmod3 tune in ideal conditions.

The bootmod3 tune opens up the car completely. Best way to describe the difference between stock and bootmod3 is sleepy vs. awake. The feel and connection to the car is just sublime now. Couldn't be happier.

Hope these numbers help folks looking for hard data.

Last edited by phorge; 02-08-2021 at 01:12 AM.. Reason: Updated bootmod3 times.
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      06-26-2020, 11:10 AM   #2
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Yes bootmod3 does wake the car up a lot. I have it on my 435i. I thought I had a tune related issue so I flashed back to stock for a few days to test and man did I miss the power. I will have to say the car does drive a little smoother without bm3 tune though.
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      06-26-2020, 01:33 PM   #3
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120+ 0-100kph pulls?? Good thing you're still under warranty!
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      06-26-2020, 02:07 PM   #4
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Randy - yeah, I'd say that's the ONLY criticism I can give on the BM3. The around the town drive-ability suffers a little bit. I personally think if they retune the throttle input in comfort mode, that would do the trick. Stock, you need a little more than 1/2 throttle for the car to take off. With the BM3, it's like maybe 1/3 throttle, so it makes it a little harder to hold sub 35mph around town or even 80mph on the freeway, because the subtle throttle inputs aren't there.

Again, I'm NIT-PICKING here.
Heck maybe off a map that offers throttle input options - comfort (stock) street (sport), race (aggressive)...

But otherwise, it's fun to smoke the tuned Diesel guys or that Lotus Elise the other day.
(Although I am cheating a bit rolling with a 430i badge...)
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      06-26-2020, 03:00 PM   #5
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Couldnt agree anymore. The turbo lag was the most annoying part of a stock 435. BM3 stage 1 is what the 435i should come as. Cant be anymore happier with the tune.
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      06-26-2020, 10:31 PM   #6
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Quote:
Originally Posted by Randy Johnson View Post
I will have to say the car does drive a little smoother without bm3 tune though.
Quote:
Originally Posted by exE36M3 View Post
Randy - yeah, I'd say that's the ONLY criticism I can give on the BM3. The around the town drive-ability suffers a little bit.
Both of you have the 35i engine. Maybe that's why the car is a bit jumpy with the tune around town with higher power figures.

With the 30i engine, this tune is perfection. Both town and highway trips are smooth as butter with added power.

Quote:
Originally Posted by jh_f30 View Post
120+ 0-100kph pulls?? Good thing you're still under warranty!
These runs were done over the course of the last 10 months or so. All in the pursuit of getting some data. I think I'm done with the runs. Maybe an occasional one here and there to get the adrenaline pumping.
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      06-29-2020, 07:59 AM   #7
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Quote:
Originally Posted by exE36M3 View Post
Randy - yeah, I'd say that's the ONLY criticism I can give on the BM3. The around the town drive-ability suffers a little bit. I personally think if they retune the throttle input in comfort mode, that would do the trick. Stock, you need a little more than 1/2 throttle for the car to take off. With the BM3, it's like maybe 1/3 throttle, so it makes it a little harder to hold sub 35mph around town or even 80mph on the freeway, because the subtle throttle inputs aren't there.

Again, I'm NIT-PICKING here.
Heck maybe off a map that offers throttle input options - comfort (stock) street (sport), race (aggressive)...

But otherwise, it's fun to smoke the tuned Diesel guys or that Lotus Elise the other day.
(Although I am cheating a bit rolling with a 430i badge...)
I found that running boost reduction on the first two gears really smooths out city driving. Running 20% reduction on 1 and 10% on 2.
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      06-29-2020, 11:37 AM   #8
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@jmack - that's a good idea I might look into.

Although I don't mind the boost where it is... the more I think about, I think throttle position value might be a better compromise. That might be easier to tune in than playing with boost... as the latter can vary significantly over fuels and tunes... whereas throttle, the variance is a bit more linear in fashion.
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      06-29-2020, 11:45 AM   #9
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For the 30i engine, with bootmod3, the build-up in speed is more linear than stock.

Is it different for the 35i and 40i engines?
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      06-29-2020, 01:13 PM   #10
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Quote:
Originally Posted by phorge View Post
For the 30i engine, with bootmod3, the build-up in speed is more linear than stock.

Is it different for the 35i and 40i engines?
From my experience with N55 engine (14' 235i) bm3 gives you a dramatic low end torgue.
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      06-29-2020, 01:41 PM   #11
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Quote:
Originally Posted by khoa@x-ph.com View Post
From my experience with N55 engine (14' 235i) bm3 gives you a dramatic low end torgue.
Thanks.

I guess it's the increased torque that makes city driving less smooth for the tuned 35i and 40i engines.
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      06-29-2020, 01:49 PM   #12
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I have no issues with my 340 with around town drive-ability -- it's actually 10x better than OEM.

In sport mode, the throttle is a bit more sensitive, but nothing that makes me regret having BM3. In comfort mode, that extra sensitivity makes it actually drive-able. Pre-BM3 it was so numb in comfort I found highway driving difficult since you had to give so much throttle to make it respond.

This could also be the drivers ability for throttle control. If one has a harder time of keeping constant throttle, then I can see how BM3 would effect their driving efforts. When I ride with my buddy, he is just brutal for fluttering the throttle, so in his case, I would envision him complaining about this extra sensitivity.
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      02-08-2021, 01:12 AM   #13
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Updated bootmod3 times above.
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      02-08-2021, 09:28 AM   #14
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Quote:
Originally Posted by phorge View Post
Updated bootmod3 times above.
Is that BM3 Stage 1?
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      02-08-2021, 10:39 AM   #15
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Seems surprisingly slow, considering BMW says it should be mid 5s stock.
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      02-08-2021, 12:34 PM   #16
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Quote:
Originally Posted by Wires View Post
Is that BM3 Stage 1?
Yes.
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      02-08-2021, 12:36 PM   #17
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Quote:
Originally Posted by MHF30 View Post
Seems surprisingly slow, considering BMW says it should be mid 5s stock.
BMW says 5.8 s for 0-100 km/h on stock cars... with launch control.

The times that seem slow are done without launch control or brake boosting.
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      02-08-2021, 03:53 PM   #18
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Quote:
Originally Posted by exE36M3 View Post
Randy - yeah, I'd say that's the ONLY criticism I can give on the BM3. The around the town drive-ability suffers a little bit. I personally think if they retune the throttle input in comfort mode, that would do the trick. Stock, you need a little more than 1/2 throttle for the car to take off. With the BM3, it's like maybe 1/3 throttle, so it makes it a little harder to hold sub 35mph around town or even 80mph on the freeway, because the subtle throttle inputs aren't there.

Again, I'm NIT-PICKING here.
Heck maybe off a map that offers throttle input options - comfort (stock) street (sport), race (aggressive)...

But otherwise, it's fun to smoke the tuned Diesel guys or that Lotus Elise the other day.
(Although I am cheating a bit rolling with a 430i badge...)
My 340 became too fast for the city with BM3 due to the throttle reaction and massive torque from very low RPM's. The xHP TCU flash did it for me; a much smoother acceleration with the same throttle. A minor but noticeable improvement came also with M Perf pedals.
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      02-08-2021, 06:41 PM   #19
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Quote:
Originally Posted by MHF30 View Post
Seems surprisingly slow, considering BMW says it should be mid 5s stock.
Quoted times, like many publications, do not include a short roll out like 1-2 feet.
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      02-08-2021, 07:50 PM   #20
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I wonder if JB+ voids warranty / is detected in the same way BM3 is. Would ISTA detect simply 4+ psi boost and flag it?
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      02-08-2021, 08:06 PM   #21
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Quote:
Originally Posted by Wires View Post
I have no issues with my 340 with around town drive-ability -- it's actually 10x better than OEM.

In sport mode, the throttle is a bit more sensitive, but nothing that makes me regret having BM3. In comfort mode, that extra sensitivity makes it actually drive-able. Pre-BM3 it was so numb in comfort I found highway driving difficult since you had to give so much throttle to make it respond.

This could also be the drivers ability for throttle control. If one has a harder time of keeping constant throttle, then I can see how BM3 would effect their driving efforts. When I ride with my buddy, he is just brutal for fluttering the throttle, so in his case, I would envision him complaining about this extra sensitivity.
I have 16 340 xdrive stock, and i agree with everything you said
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      02-08-2021, 09:45 PM   #22
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Quote:
Originally Posted by AMG KLR View Post
I wonder if JB+ voids warranty / is detected in the same way BM3 is. Would ISTA detect simply 4+ psi boost and flag it?
Maybe not automatically, but they can detect piggybacks too if they dig deep enough.
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