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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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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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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https://g20.bimmerpost.com/forums/sh...control&page=3 |
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02-07-2020, 12:54 AM | #115 | |
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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? Cheers |
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02-07-2020, 10:54 AM | #117 | |
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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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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, 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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02-07-2020, 11:41 PM | #123 |
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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. Quote:
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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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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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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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IS that cranked to +100 percent ? |
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02-18-2020, 02:01 PM | #130 |
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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.
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02-18-2020, 02:41 PM | #131 | |
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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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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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