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Technical Topics B48 4-Cylinder Turbo Engine / Drivetrain / Exhaust Modifications Who has the quickest G20 330i on Bimmerpost?

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      09-15-2020, 10:30 PM   #23
VipinLJ
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Originally Posted by Avaley View Post
I have the exact same tires and know that these wheels will be a major bottleneck after bolt ons get added.

After i trans flashed, traction is starting to be noticeably worse. It wasn't an issue with just the stage 1 ECU flash...I'm not even going to think about adding boost to launch control (which is an awesome option ) until I get some performance non RFTs.

Pretty silly that the newer ones have had so much restrictions in OEM software but I guess that comes with digitization....
Yup. These tires wear down fast too. When it was new, they used to grip perfectly even when there were some stones or sand on the road. Today when I launched, I swear I heard the tires chirp a bit before gripping properly. I've never heard any of my AWD cars chirp when launching.

So you're saying stock was better with the ECU flash? Or that was the case for stage 1 ECU tune only? Sorry I'm a noob, especially when it comes to TCU tuning.
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      09-15-2020, 11:52 PM   #24
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Quote:
Originally Posted by VipinLJ View Post
Yup. These tires wear down fast too. When it was new, they used to grip perfectly even when there were some stones or sand on the road. Today when I launched, I swear I heard the tires chirp a bit before gripping properly. I've never heard any of my AWD cars chirp when launching.

So you're saying stock was better with the ECU flash? Or that was the case for stage 1 ECU tune only? Sorry I'm a noob, especially when it comes to TCU tuning.
Tires were fine with just stage 1, once I added tcu tuning the tires started really showing their weakness as run flat all seasons during launches as xHP tweaked the LC, and sport+ with s gear after stage 3 trans flash I notice my rear end drifting much more than stage 1 ecu only accelerating through corners. OEM tires will really struggle with a stage 2 ecu flash.

I was also referring to the issues with ecu flashing that some of the newer G20s had restrictive dealer software bricking their cars when ECU flashing.
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      09-16-2020, 12:32 AM   #25
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Originally Posted by Avaley View Post
Tires were fine with just stage 1, once I added tcu tuning the tires started really showing their weakness as run flat all seasons during launches as xHP tweaked the LC, and sport+ with s gear after stage 3 trans flash I notice my rear end drifting much more than stage 1 ecu only accelerating through corners. OEM tires will really struggle with a stage 2 ecu flash.

I was also referring to the issues with ecu flashing that some of the newer G20s had restrictive dealer software bricking their cars when ECU flashing.
Ahhh yes. That makes sense. I’m actually thinking of getting new tires and storing the OEM RFTs to put back on when my lease is up.

And yes. My car was bricked when I tried flashing it with BM3 back in December. My car had the updated DME software but no one knew for sure back then if BMW was doing updates. Also, there was no one unlocking these DMEs then. I had no other option but to return it and get a JB+ instead. I wonder what times BM3 tunes G20s are getting.
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      09-16-2020, 03:14 PM   #26
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Today's run. Used launch control. Same mods as before (JB4 map 2, ~E25-30)
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      09-17-2020, 03:35 PM   #27
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Nice !!!

This is my full stock 0-100, 1/4 mile and 100-200 km/h results from today:







Im on 98 fuel (european measure).
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      09-17-2020, 05:49 PM   #28
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Did a run today on an uneven road. Car was in comfort mode, shifter in D. All electrical nannies on. No brake boosting. Just WOT from a standstill.
Looking at the speed/acceleration graph, you can see the change when the extra boost comes into play.
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      09-18-2020, 05:14 AM   #29
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Have You tried with LC? I think You can beat 5 seconds.
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      09-18-2020, 08:25 AM   #30
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Originally Posted by VipinLJ View Post
Did a run today on an uneven road. Car was in comfort mode, shifter in D. All electrical nannies on. No brake boosting. Just WOT from a standstill.
Looking at the speed/acceleration graph, you can see the change when the extra boost comes into play.
5.7 seems slow for a tuned 330, even in comfort mode. Stock is supposed to be 5.2 with xDrive. Your 4.7 run seems more in line with what I would expect
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      09-18-2020, 08:31 AM   #31
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Kies Motorsport made a video on the unlocking of the DME
almost pulled the trigger on BM3 but now I'll def stick with my JB+
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      09-18-2020, 11:47 AM   #32
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5.7 seems slow for a tuned 330, even in comfort mode. Stock is supposed to be 5.2 with xDrive. Your 4.7 run seems more in line with what I would expect
5.7 was just flooring it from a standstill. No launch control. Traction control etc was on. When it was stock, my 330i did the 0-60 in 6.xs, sometimes even more, under the same conditions. Remember. This is without launch control or brake boosting. There is lag till around 2000rpms before she picks up her skirt and runs.
And I'm not sure how people get 5.2s 0-60 with xdrive. My car stock was definitely slower. I did some runs stock without a dragy and it was always in the 5.5-5.7s range with LC.
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      09-18-2020, 11:50 AM   #33
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Originally Posted by chris_portimaog20 View Post

Kies Motorsport made a video on the unlocking of the DME
almost pulled the trigger on BM3 but now I'll def stick with my JB+
If you can get a tune and don't mind losing warranty at all, do it. A tune is better than a JB+ when it comes to power delivery While I love my JB4, I sometimes wish the power delivery was linear.
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      09-18-2020, 12:01 PM   #34
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Originally Posted by bquatt View Post
5.7 seems slow for a tuned 330, even in comfort mode. Stock is supposed to be 5.2 with xDrive. Your 4.7 run seems more in line with what I would expect
5.7 was just flooring it from a standstill. No launch control. Traction control etc was on. When it was stock, my 330i did the 0-60 in 6.xs, sometimes even more, under the same conditions. Remember. This is without launch control or brake boosting. There is lag till around 2000rpms before she picks up her skirt and runs.
And I'm not sure how people get 5.2s 0-60 with xdrive. My car stock was definitely slower. I did some runs stock without a dragy and it was always in the 5.5-5.7s range with LC.
I am assuming tires play a big role in the 5.2 number BMW claims. It was probably equipped with sticky summer tires when they tested.

I'm very impressed with the 4.7 and 13.1 quarter mile time you posted. That's prior gen 340i like numbers. Maybe even slightly faster in the quarter mile.
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      09-18-2020, 01:27 PM   #35
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I am assuming tires play a big role in the 5.2 number BMW claims. It was probably equipped with sticky summer tires when they tested.

I'm very impressed with the 4.7 and 13.1 quarter mile time you posted. That's prior gen 340i like numbers. Maybe even slightly faster in the quarter mile.
I agree. I have the base skinny all season RFTs. Planning on getting better tyres since these are almost at 4/32.

And yes. The 4.7s 0-60 isn’t too shabby but I like how it pulls from 60 to say 100mph. Useful when overtaking here. And the quarter mile surprised me too. I thought it was around 13.6s with the JB4. Did not expect 13.2!
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