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Technical Topics B48 4-Cylinder Turbo Engine / Drivetrain / Exhaust Modifications JB+ on G20 First Impressions

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      02-21-2020, 11:02 PM   #177
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Originally Posted by Razor2010 View Post
Great! This makes me hopeful.

I drove an Audi with DCT about 8 years ago and it shifted instantly, if the 330i is anywhere near as fast I will be happy.

Do you use the paddles or gear knob when in manual shifting mode?
Yup. Shifts are pretty damn fast.

And I use the paddles more than the lever since it’s easily accessible. I use the shift lever when I want to feel some semblance of shifting like in a manual transmission car.

The paddles are very responsive and instantaneous. I’d be willing to say the paddles actually shift better than the ones in my ex-A4 where there was a tiny delay between clicking and the transmission actually shifting. They’re definitely faster than in my A7 and SQ5.
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      02-22-2020, 04:41 AM   #178
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Yup. Shifts are pretty damn fast.

And I use the paddles more than the lever since it’s easily accessible. I use the shift lever when I want to feel some semblance of shifting like in a manual transmission car.

The paddles are very responsive and instantaneous. I’d be willing to say the paddles actually shift better than the ones in my ex-A4 where there was a tiny delay between clicking and the transmission actually shifting. They’re definitely faster than in my A7 and SQ5.
Great to hear! Are the A7 and SQ5 DCT?

Are the paddles in the 330i faster than the shift lever?
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      02-22-2020, 10:21 AM   #179
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Great to hear! Are the A7 and SQ5 DCT?

Are the paddles in the 330i faster than the shift lever?
A7 and SQ5 are ZF. My A4 was DSG. So no DCT cars in my garage now. Just 4 ZF cars. And the BMWs have a better tune than the Audis (transmission tune).

And I don’t think so. Both are really fast and responsive. I’d say they respond at similar times. Just that paddles are easier since your hands and fingers are on the steering anyway (depends on how one drives - I drive with both my hands on the steering wheel).
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      02-22-2020, 10:33 AM   #180
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A7 and SQ5 are ZF. My A4 was DSG. So no DCT cars in my garage now. Just 4 ZF cars. And the BMWs have a better tune than the Audis (transmission tune).

And I don’t think so. Both are really fast and responsive. I’d say they respond at similar times. Just that paddles are easier since your hands and fingers are on the steering anyway (depends on how one drives - I drive with both my hands on the steering wheel).
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      02-26-2020, 09:09 AM   #181
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Guys,

I have a 2020 G20 330i (built 11/19) with the B48D engine. I would like to go either the JB+ or BM3 route, preferably BM3.

I would probably like to start off with the JB+ but I was wondering if I would run into any problems as where I am, the average temperature is about 30°C all year round with very high humidity. We have easy access to RON97 fuel (Shell V-Power).
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      02-26-2020, 09:25 AM   #182
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Guys,

I have a 2020 G20 330i (built 11/19) with the B48D engine. I would like to go either the JB+ or BM3 route, preferably BM3.

I would probably like to start off with the JB+ but I was wondering if I would run into any problems as where I am, the average temperature is about 30°C all year round with very high humidity. We have easy access to RON97 fuel (Shell V-Power).
High heat is an enemy of engines, especially forced induction. 97 over 95 RON will help, BUT, my personal opinion is either have a customized tune performed by a very experienced tuner, or stay away from increasing boost in this type of environment.
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      02-26-2020, 10:02 AM   #183
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Originally Posted by Razor2010 View Post
High heat is an enemy of engines, especially forced induction. 97 over 95 RON will help, BUT, my personal opinion is either have a customized tune performed by a very experienced tuner, or stay away from increasing boost in this type of environment.
What kind of problems could I possibly face in the future if I do decide to go with JB+ ?
We don't really have any custom brick and mortar tuners here, really my best bet of a tune would be to go with BM3. If only MP did tunes for the B48.
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      02-26-2020, 10:14 AM   #184
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What kind of problems could I possibly face in the future if I do decide to go with JB+ ?
We don't really have any custom brick and mortar tuners here, really my best bet of a tune would be to go with BM3. If only MP did tunes for the B48.
Potential problems could be consistent knock or detonation destroying your engine.
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      02-26-2020, 10:44 AM   #185
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Originally Posted by MRMALTIES View Post
What kind of problems could I possibly face in the future if I do decide to go with JB+ ?
We don't really have any custom brick and mortar tuners here, really my best bet of a tune would be to go with BM3. If only MP did tunes for the B48.
If you do go via the BM3 route, let us know how that went.
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      02-26-2020, 01:17 PM   #186
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Quote:
Originally Posted by Razor2010 View Post
High heat is an enemy of engines, especially forced induction. 97 over 95 RON will help, BUT, my personal opinion is either have a customized tune performed by a very experienced tuner, or stay away from increasing boost in this type of environment.
What kind of problems could I possibly face in the future if I do decide to go with JB+ ?
We don't really have any custom brick and mortar tuners here, really my best bet of a tune would be to go with BM3. If only MP did tunes for the B48.
Tbh I really don't believe that you won't run into problems w the JB+, JB4, and BM3. These tuners obviously test their tunes on tester cars before releasing them. But obviously if you go sicko mode on ur car, you'll run into issues which is very rare. I mean it's a fact that if you treat something really roughly, of course there's gonna be early wear and tear and issues. But just treat ur car w a little care and enjoy it, and I'm sure there won't be issues. I mean it's so rare to hear of a modern bimmer engine detonating bc of a tune like BM3 jb+ and JB4. I think the examples of engine failure and detonation just cuz of a tune is wayyyyyy too extreme. Just enjoy ur car to its potential!
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      02-26-2020, 02:03 PM   #187
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Originally Posted by hamzag20 View Post
Tbh I really don't believe that you won't run into problems w the JB+, JB4, and BM3. These tuners obviously test their tunes on tester cars before releasing them. But obviously if you go sicko mode on ur car, you'll run into issues which is very rare. I mean it's a fact that if you treat something really roughly, of course there's gonna be early wear and tear and issues. But just treat ur car w a little care and enjoy it, and I'm sure there won't be issues. I mean it's so rare to hear of a modern bimmer engine detonating bc of a tune like BM3 jb+ and JB4. I think the examples of engine failure and detonation just cuz of a tune is wayyyyyy too extreme. Just enjoy ur car to its potential!
Something else that I don't think is discussed enough is the potential to end up with actual decline in the overall driving experience because of a 'quick fix' boost only increase device. So your boost goes up 3-5 psi and your car doesn't blow up, but your engine management pulls timing, runs richer, etc. to protect itself and the net result is actually a worse power-band or lower HP and TQ than stock. So yes, modern engines may be less likely to blow-up but that is also because they have more ways of protecting themselves which could end up with an overall slower and poorer performing car even though you cranked the boost 3-5 psi.

Again, if you have access to 98 - 100 RON fuel, year round temps less than 70'f and don't track your car, you will probably experience a net positive by just slapping on a device that increases your boost 3-5 psi and should get away without any damage. If you have lower octane fuel, hot temps and track your car, your risk increases significantly and I would not increase the boost without a full, proper, custom map from a very experienced tuner. Broken record here but there is no free lunch out there or the 330i would have just come 3-5 psi higher from factory.
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      03-01-2020, 03:03 AM   #188
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What did you have on your a4? I just got out of a Sti with flex/gas tune and never had a problem with any a4 I had seen out and about. Maybe you had a factory freak?
Just a Racechip ultimate and an intake. And A4s are underrated. Lots of people get a 0-60 in 5s flat with a stock car. With the piggyback and intake, I got a 4.6xs on a dragy. Unfortunately I can't find it now since it was a while back and the car is gone too. But yes. It was very fast. Even stock for stock, I think my A4 felt faster than my 330i. Plus quattro and DSG helps it launch well compared to a manual transmission.

With a simple stage 1 tune (APR/Revo), people are doing 4.4-4.5s without any weight saving or other mods.
Interesting. Speaking of that I recently just raced a stock A4 Quattro w my stock 330xi and it was close but I had the better launch and beat him. I was able to get it on vid.
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      03-01-2020, 05:57 AM   #189
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Interesting. Speaking of that I recently just raced a stock A4 Quattro w my stock 330xi and it was close but I had the better launch and beat him. I was able to get it on vid.
What year A4?
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      03-01-2020, 07:50 AM   #190
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Interesting. Speaking of that I recently just raced a stock A4 Quattro w my stock 330xi and it was close but I had the better launch and beat him. I was able to get it on vid.
I’d love to see that video The A4 is a fast car! In fact, in the entry level luxury 2.0l sedan class, the only car that is faster than it is the AR Giulia. My butt dyno still tells me that my A4 was a faster car and even stock for stock, my 330i feels slower.
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      03-01-2020, 10:26 AM   #191
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Interesting. Speaking of that I recently just raced a stock A4 Quattro w my stock 330xi and it was close but I had the better launch and beat him. I was able to get it on vid.
What year A4?
I think it was a '17. Not entirely sure.
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      03-01-2020, 10:27 AM   #192
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Interesting. Speaking of that I recently just raced a stock A4 Quattro w my stock 330xi and it was close but I had the better launch and beat him. I was able to get it on vid.
I’d love to see that video The A4 is a fast car! In fact, in the entry level luxury 2.0l sedan class, the only car that is faster than it is the AR Giulia. My butt dyno still tells me that my A4 was a faster car and even stock for stock, my 330i feels slower.
Yeah shoot me a dm on ig and I can send. I might've just won cuz I was able to properly launch my car versus the Audi that didn't start off well.
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      03-01-2020, 11:21 AM   #193
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Interesting. Speaking of that I recently just raced a stock A4 Quattro w my stock 330xi and it was close but I had the better launch and beat him. I was able to get it on vid.
I’d love to see that video The A4 is a fast car! In fact, in the entry level luxury 2.0l sedan class, the only car that is faster than it is the AR Giulia. My butt dyno still tells me that my A4 was a faster car and even stock for stock, my 330i feels slower.
Idk where you got that the A4 Quattro is faster than the 330i x drive because the 0-60 time for A4 Quattro premium plus and prestige is 5.4 seconds versus the 330i x drive which has a 0-60 of 5.2 seconds. After driving both cars, I believe that my 3er certainly felt faster.
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      03-01-2020, 12:18 PM   #194
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Idk where you got that the A4 Quattro is faster than the 330i x drive because the 0-60 time for A4 Quattro premium plus and prestige is 5.4 seconds versus the 330i x drive which has a 0-60 of 5.2 seconds. After driving both cars, I believe that my 3er certainly felt faster.
Because I had the B9 A4 2.0 Quattro for three years. And i had more than a month with both cars in the garage together. Did back to back drives and the A4 was DEFINITELY faster. Stock for stock. With a simple piggy back and intake, my A4 was much faster than my stock 330i. Not saying the 330i is a slow car on general. On the contrary, it is a fast car. BUT the A4 is faster even if it's by a few milliseconds

Edit - Audi has significantly underrated both the 0-60 times as well as power of the 2.0. BMW has underrated it too but I believe Audi even more so.
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      03-01-2020, 12:26 PM   #195
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Idk where you got that the A4 Quattro is faster than the 330i x drive because the 0-60 time for A4 Quattro premium plus and prestige is 5.4 seconds versus the 330i x drive which has a 0-60 of 5.2 seconds. After driving both cars, I believe that my 3er certainly felt faster.
Because I had the B9 A4 2.0 Quattro for three years. And i had more than a month with both cars in the garage together. Did back to back drives and the A4 was DEFINITELY faster. Stock for stock. With a simple piggy back and intake, my A4 was much faster than my stock 330i. Not saying the 330i is a slow car on general. On the contrary, it is a fast car. BUT the A4 is faster even if it's by a few milliseconds

Edit - Audi has significantly underrated both the 0-60 times as well as power of the 2.0. BMW has underrated it too but I believe Audi even more so.
Factory Freak lol? But yeah realistically it's probs that both cars are underrated but the numbers I got were from Motortrend.
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      03-01-2020, 01:13 PM   #196
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Factory Freak lol? But yeah realistically it's probs that both cars are underrated but the numbers I got were from Motortrend.
Hehe I wish. I'm still in my B9 whatsapp group and there have been people posting dragy even of a stock A4s doing 5s flat 0-60s. Lots of 5.2s too. My A4 did 5.2s stock and 4.6-4.7s with RC. My 330i with the JB+ does it in 5.2s. Stock was definitely slower since the jb+ does make it feel faster.
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      03-01-2020, 02:42 PM   #197
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Factory Freak lol? But yeah realistically it's probs that both cars are underrated but the numbers I got were from Motortrend.
Hehe I wish. I'm still in my B9 whatsapp group and there have been people posting dragy even of a stock A4s doing 5s flat 0-60s. Lots of 5.2s too. My A4 did 5.2s stock and 4.6-4.7s with RC. My 330i with the JB+ does it in 5.2s. Stock was definitely slower since the jb+ does make it feel faster.
Wait what. The 330i xdrive with the JB+ does 0-60 in 5.2? BMW claims that the 330xi does 0-60 5.2s stock. If this is the case, then either the JB+ isn't doing its job or the BMW is overrating the 0-60 which I doubt. Makes me reconsider whether I should buy the JB+.
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      03-01-2020, 02:50 PM   #198
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Wait what. The 330i xdrive with the JB+ does 0-60 in 5.2? BMW claims that the 330xi does 0-60 5.2s stock. If this is the case, then either the JB+ isn't doing its job or the BMW is overrating the 0-60 which I doubt. Makes me reconsider whether I should buy the JB+.
5.3 per BMW USA, see below. Makes you wonder what the net result of that JB+ really is.....maybe just turning up the boost and the engine pulls timing and dumps in more fuel to protect itself leading to a net result of no more power really than stock. Very interesting.
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