To put my views and thoughts on the G20 into perspective, I want to start off by saying that this is the first car I have ever modded, it was the third BMW (E60 528i & F25 X3 before G20) I have driven at the time, and since I have never driven any older E generation BMWs, the G20 330i is also the best BMW I’ve driven to date. I’ve driven a F generation 430i and a G generation X2 recently (both were loaners) and I think the steering on the 430i was tighter than the G20, but everything else on the G20 is better than both those cars by a fair margin.
Stage 1 on G20 is very refined. Any jerkiness that happens while on JB+ or stock is no longer there. The power delivery is superb. In low speed ranges, typically between 0-100km/h the car feels like it accelerates at the same rate when shifting from 1st to 4th. I feel like on the JB+, the first three gears pull more than stock for sure, but 4th is where you start to feel the car slowing in acceleration. With BM3, 4th gear gives you that same feeling as the first three gears. The 4th gear pulls quick in the 0-100km/h range. If I did the math correctly, on paper I should be making 300HP/370LBFT TQ right now. I don’t know what that translates to for 0-100 times but it’s a huge difference from stock, and very noticeable coming from JB+. I’ve heard someone say in another thread that JB+ on G20 did 0-100 in 4.9 seconds, so BM3 must be even faster than that.
Regarding whether or not BM3 is worth it, it is definitely worth it if you want a power increase that can go all the way up to stage 2 just with a high flow downpipe, all for $800 CAD. And for the people comparing JB+ and BM3, the bump in speed difference from JB+ to BM3 is the same or even more than the speed bump from stock to JB+.
I don’t have a dragy but I guess I could update you guys with a OBD2 0-100 timer.
Let me know if you guys have any questions, I will try my best to get back to you.
