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      02-06-2020, 11:10 PM   #111
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A video comparing the speedometer readings from my 2017 Audi A4 B9 Quattro with Racechip ultimate connect and my 2020 BMW 330i xDrive with JB+.



Another video of my 2017 Audi A4 B9 with only an intake (Racechip was removed) and 2020 BMW 330i with JB+.
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      02-06-2020, 11:49 PM   #112
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Originally Posted by VipinLJ View Post


A video comparing the speedometer readings from my 2017 Audi A4 B9 Quattro with Racechip ultimate connect and my 2020 BMW 330i xDrive with JB+.



Another video of my 2017 Audi A4 B9 with only an intake (Racechip was removed) and 2020 BMW 330i with JB+.
So you were able to do launch control? Nice videos!
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      02-06-2020, 11:58 PM   #113
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Originally Posted by pneumodoc View Post
So you were able to do launch control? Nice videos!
Well. It doesn’t say launch control in the live cockpit on our NA cars but in the European ones, it does. I had traction turned off (long press the button), car in sport mode, transmission in S. Brake pedal to the floor and then throttle to the floor too.
In the Audi, the car does not strain against the brakes. The clutch isn’t engaged till you release the throttle pedal. It has real launch control. In the BMW, the car strains against the brakes. Like how it does in my A7 and SQ5. Only cars with dual clutch transmission has true launch control I believe. Ours can only be brake boosted.

Edit - In the second video, my A4 did not have the racechip. I had removed it. It only had an intake. Which basically means car was almost stock. The stock A4 was as fast as my 330i with a JB+.
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      02-07-2020, 12:21 AM   #114
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Originally Posted by VipinLJ View Post
Well. It doesn’t say launch control in the live cockpit on our NA cars but in the European ones, it does. I had traction turned off (long press the button), car in sport mode, transmission in S. Brake pedal to the floor and then throttle to the floor too.
In the Audi, the car does not strain against the brakes. The clutch isn’t engaged till you release the throttle pedal. It has real launch control. In the BMW, the car strains against the brakes. Like how it does in my A7 and SQ5. Only cars with dual clutch transmission has true launch control I believe. Ours can only be brake boosted.

Edit - In the second video, my A4 did not have the racechip. I had removed it. It only had an intake. Which basically means car was almost stock. The stock A4 was as fast as my 330i with a JB+.
Interesting. In this post a US 330i was able to be launched. Don’t know If it’s really a great idea though.

https://g20.bimmerpost.com/forums/sh...control&page=3
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      02-07-2020, 12:54 AM   #115
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Originally Posted by pneumodoc View Post
Interesting. In this post a US 330i was able to be launched. Don’t know If it’s really a great idea though.

https://g20.bimmerpost.com/forums/sh...control&page=3
Well yes. Watching the European cars where it actually says “Launch control” on the live cockpit, it looks like those cars also strain against the brakes. Which is basically the engine brake torquing against the gearbox and getting ready to “launch” the car. The NA 330i can be brake torqued to 3000rpms. So essentially our cars are the same. Just that we are missing the “launch control” notification on the live cockpit. Idk why BMW works like this, where one market gets certain features like LC notification and sport + mode and stuff and another market doesn’t.
In cars with dual clutch transmissions, like in my B9 A4, it’s the clutch that is disengaged and engaged. Car doesn’t strain against the brakes at all. Which was why I could do launch controls all day in it whereas in my 330i, I probably wouldn’t because I worry about stressing the brakes too.

Now I could be wrong about all what I’ve said since that is my theory and I’m not sure if it is correct or wrong. I haven’t had time to research more on it.

Also, I will not be doing launch controls on my 330i that often even though it is fun when you get an empty stretch of road because of the reason I mentioned above.
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      02-07-2020, 08:42 AM   #116
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Nice videos, thank you for posting.

Most interesting thing for me was to see that to the naked eye the DCT didn't seem to change gears any faster than the slush-box in the 330i. Could you 'feel' a difference in hard acceleration like this, medium driving and slow driving? Was the DCT significantly faster and / or better?

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      02-07-2020, 10:54 AM   #117
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Quote:
Originally Posted by Razor2010 View Post
Nice videos, thank you for posting.

Most interesting thing for me was to see that to the naked eye the DCT didn't seem to change gears any faster than the slush-box in the 330i. Could you 'feel' a difference in hard acceleration like this, medium driving and slow driving? Was the DCT significantly faster and / or better?

Cheers
The DCT is real fast. But BMW has done an excellent job when tuning the ZF8 which shifts almost as fast as the DSG in my ex-A4. I honestly do not miss DSG at all. In my Audis, the ZF8 does shift slower than it does in my BMWs. In comfort mode, the Audis with ZF8 feel extremely lazy when shifting and it was significantly slower than the DSG in my A4 in comfort mode. But yes. BMW has mastered mapping the ZF8.
Also, in traffic, the DSG was jerky, especially when downshifting. The ZF in my BMW isn’t bad in traffic.
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      02-07-2020, 11:58 AM   #118
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Originally Posted by VipinLJ View Post
The DCT is real fast. But BMW has done an excellent job when tuning the ZF8 which shifts almost as fast as the DSG in my ex-A4. I honestly do not miss DSG at all. In my Audis, the ZF8 does shift slower than it does in my BMWs. In comfort mode, the Audis with ZF8 feel extremely lazy when shifting and it was significantly slower than the DSG in my A4 in comfort mode. But yes. BMW has mastered mapping the ZF8.
Also, in traffic, the DSG was jerky, especially when downshifting. The ZF in my BMW isn’t bad in traffic.
Thank you for this. Nice to know that you don't miss the DCT. That is what is most important in my opinion. The ZF8 will never be as fast as a DCT, I think this is the reality that we all have to accept; however, the fact that it is 'close enough' and that overall it isn't missed when factoring in regular driving and spirited driving is really what should be focused on. I just hope that 5 years in it is still shifting as fast when internal parts of the box begin to wear. The ZF in my e90 330i was absolutely horrible after a few years, but to be honest was never really good to begin with.
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      02-07-2020, 01:24 PM   #119
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I examined your first video more closely, it seems as though these two cars may almost be identical in acceleration. See image below, if you pause around 3 seconds into the video the Audi is at 6 mph and the BMW is at 1 mph. My guess here is that the cars are not starting the acceleration at the same time which is what I think you were trying to accomplish in showing. By the end of the video, or pausing every 2 seconds, you can see that the difference in acceleration is basically maintained at 5 mph difference until the end. I think this difference is purely related to when the video / car launches making them almost identical in acceleration. Thoughts?
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      02-07-2020, 02:41 PM   #120
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Looks like the one without the racechip on the Audi confirms this. The start is even more behind (7 mph) for the 330i in the second video (see below), but by the end it basically has caught up.
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      02-07-2020, 10:13 PM   #121
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That’s because, in LC mode, the Audi speedometer starts at 5mph (from 0, it jumps straight to 5mph). The BMW starts at 1mph (from 0, it goes to 1mph).
I used a video editing app to go down to milliseconds to make sure both the videos showed the speedometer needle (not digital readout) start moving at the exact same millisecond (the needles start moving at 3.6s from the start of the video). This was done for both videos. Just that the digital readout in both cars are at varying intervals.
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      02-07-2020, 10:59 PM   #122
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Quote:
Originally Posted by VipinLJ View Post
That’s because, in LC mode, the Audi speedometer starts at 5mph (from 0, it jumps straight to 5mph). The BMW starts at 1mph (from 0, it goes to 1mph).
I used a video editing app to go down to milliseconds to make sure both the videos showed the speedometer needle (not digital readout) start moving at the exact same millisecond (the needles start moving at 3.6s from the start of the video). This was done for both videos. Just that the digital readout in both cars are at varying intervals.
Gotcha, thanks for the clarification.
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      02-07-2020, 11:41 PM   #123
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Quote:
Originally Posted by Razor2010 View Post
Gotcha, thanks for the clarification.
You’re welcome!
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      02-18-2020, 11:43 AM   #124
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How about fuel efficiency after the jb ? did it get worst or better ?.

Crackles and burbles ?? Exhaust sound difference if any.

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Originally Posted by g20beam View Post
Okay here’s my update.

I have driven around with the JB+ for 4 days now and there is definitely a very noticeable difference in power. I was racing a 370z yesterday and I have HD dashcam footage I can post but I managed to keep up with it and close the gap while I was tailing him. It was too wet out so I was a little nervous to push it faster than I already did, but hopefully I can do it with another car in the future. The lower and mid level RPM ranges, approximately between 1K-4K RPM you definitely feel a lot more boost.

I used to drive with the manual mode a lot before the JB+ because the car would get really jerky in low gear + low rpm so I would try to get the vehicle to accelerate smoother instead of getting the jerk when in automatic + sport mode. After the JB+, the jerkiness problem went away. The power delivery is so much smoother now, I kind of wonder why they didn’t come like this from factory. It is so much more effortless to get to 80-100kmh range with the JB+, compared to stock when you would really have to floor it to get to that speed.

Other things I have noticed is that the brake pedal is more sensitive now than it used to be, and I feel more confident when going close to full throttle and slowing down after. Throttle response definitely has improved. The only one thing I noticed that freaked me out was a sudden push forward when I was pulling in manual gear and was in 2nd gear. It hasn’t happened again but it happened once and I don’t know what it was.

That’s about it, I will get a link of the dashcam footage up if anyone is interested in seeing this 370z
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      02-18-2020, 01:24 PM   #125
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also, I feel like there is much more room and space for the G20 330 to go with its 4 cyc.

Stock numbers for the new 235 is

The 2020 M235i xDrive Gran Coupe accelerates from 0 to 60 mph in 4.7 seconds (4.6 seconds with the optional overboost function) and reaches a top speed of 155 mph when equipped with performance tires.

So its possible we can safely get there and tbh thats all the power I can ask for. Even 5 flat is good.

my f30 335 was a beast.
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      02-18-2020, 01:48 PM   #126
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also, I feel like there is much more room and space for the G20 330 to go with its 4 cyc.

Stock numbers for the new 235 is

The 2020 M235i xDrive Gran Coupe accelerates from 0 to 60 mph in 4.7 seconds (4.6 seconds with the optional overboost function) and reaches a top speed of 155 mph when equipped with performance tires.

So its possible we can safely get there and tbh thats all the power I can ask for. Even 5 flat is good.

my f30 335 was a beast.
Hi, does the 2020 M235i come with the exact same engine as the 330i? Don’t some of these BMW 4 cylinders come with up-rated internals, lower compression and bigger turbos?

Just checked, the M235i comes with 9.5 compression and the 330i 10.2. My guess would be the M235i has a bigger turbo than the 330i and probably some other differences internal and external.

Again, no free lunch out there.

Last edited by Razor2010; 02-18-2020 at 01:58 PM..
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      02-18-2020, 01:49 PM   #127
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With the JB+, my fuel efficiency hasn't changed. Exhaust sounds the same too.

And I get a 5.1-5.2s 0-62mph time according to the speedometer. 0-60 is around 4.8-4.9s.
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      02-18-2020, 01:52 PM   #128
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Quote:
Originally Posted by Razor2010 View Post
Hi, does the 2020 M235i come with the exact same engine as the 330i? Don’t some of these BMW 4 cylinders come with up-rated internals, lower compression and bigger turbos?

Again, no free lunch out there.
I guess you are right. But if I can pay a little to get it done under warranty I would do it with no questions. Who knows what dinan will do in the near future aswell.

I think may be bigger turbos and obvi same exhaust system as 340
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      02-18-2020, 01:53 PM   #129
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Quote:
Originally Posted by VipinLJ View Post
With the JB+, my fuel efficiency hasn't changed. Exhaust sounds the same too.

And I get a 5.1-5.2s 0-62mph time according to the speedometer. 0-60 is around 4.8-4.9s.
For a small mod I think thats pretty fantastic. I think I will look into purchasing a jb+. I just got my g20 this weekend for presidents day sale.

IS that cranked to +100 percent ?
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      02-18-2020, 02:01 PM   #130
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Quote:
Originally Posted by VipinLJ View Post
With the JB+, my fuel efficiency hasn't changed. Exhaust sounds the same too.

And I get a 5.1-5.2s 0-62mph time according to the speedometer. 0-60 is around 4.8-4.9s.
The M235i is xdrive. I would image your JB+ 330i is almost exactly the same speed as the M235i xdrive and the launch just a little quicker on xdrive leading to the 4.6 vs. 4.8/4.9 time.
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      02-18-2020, 02:41 PM   #131
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For a small mod I think thats pretty fantastic. I think I will look into purchasing a jb+. I just got my g20 this weekend for presidents day sale.

IS that cranked to +100 percent ?
It's worth the money I paid for it ($199). And yes. I have it cranked to 100%.

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The M235i is xdrive. I would image your JB+ 330i is almost exactly the same speed as the M235i xdrive and the launch just a little quicker on xdrive leading to the 4.6 vs. 4.8/4.9 time.
Plus the M235i is a 306bhp car. And I'm sure it is lighter as well. My 330i probably puts out 285bhp at the crank with the jb+. My A4 was around 310bhp and did a 4.6s 0-60.
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      02-18-2020, 02:51 PM   #132
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Quote:
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It's worth the money I paid for it ($199). And yes. I have it cranked to 100%.



Plus the M235i is a 306bhp car. And I'm sure it is lighter as well. My 330i probably puts out 285bhp at the crank with the jb+. My A4 was around 310bhp and did a 4.6s 0-60.
BMW website actually lists the M235i xdrive a little heavier than the 330i, 3,605 vs. 3,589 lbs.

I actually love that the 330i is lighter than the M340i even if lower powered, and basically the same weight as the M235i.

My WRX Sti7 was roughly 275 HP and TQ and 3,200 lbs. so I am expecting my 330i to feel similar acceleration wise.

Last edited by Razor2010; 02-18-2020 at 03:02 PM..
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