[Delnari]

Originally Posted by Bennu

I want to see a dyno with the JB4 and CAI.

That is the one here . aFe Intake and N55 Stage 1; 28 more HP and 35 more ft. lbs of torque over stock with aFe alone.

[Mperfection]

How does this work with the tune if you uninstall it? I know when I had a Cobb Accessport in the past if you uninstalled it for say service then it would erase any tunes you may had done with the car and would just revert back to the standard universal maps that came with it. I wouldn't want to pay for a dyno tune just to lose it because I had to remove it for a day then have to go back and re-dyno tune it again with the JB4.

[phoenixbmwlife]

Originally Posted by Delnari

That is the one here . aFe Intake and JB4 Stage 1; 28 more HP and 35 more ft. lbs of torque over stock with aFe alone.

Sorry I meant the stage 2 with the CAI.

[HX_Guy]

Originally Posted by Delnari

Finally was able to get the car on the dyno this morning. The baseline was performed with the aFe Intake installed as I didn't want to waste time/money putting the stock intake on and off. The car delivered good numbers with just the intake alone. Looks like the torque numbers were higher than expected. My tuner said the 295.57 HP and 330.75 Torque is the highest stock numbers he has seen on his dyno for any stock N55 motor. That tells me we are getting a bit more power than BMW is letting on

With the JB4 Stage 1 installed we see gains in both HP and Torque, but to be honest not what I was expecting from the BMS suggested gains posted on the website. The best was 323.15 HP and 365.67 Torque. A peak gain of +27.58 HP and +34.92 Torque. That said, for less than $400 and two easy connections to insert it still is a good deal for this car. I hope the JB4 Stage 2 running Map 1 puts out better number with the added controls.

Did you do any tuning while on the dyno? I see you did 3 runs and the numbers are quite different on each run, what changes were made?

[Delnari]

No tuning by the shop. They are not equip'd to do tuning for the 2 Series car. The multiple runs were to establish a baseline with just the intake then several runs with the N55 Stage 1 installed to see how it handle heat soak for real world power.

[HX_Guy]

Oh I see now, the file names/numbers get bigger with the lower power (heat soak). I thought your first run was 316, then 320 and then 323 and thought you were doing some tuning to improve the numbers but looks like it was actually in reverse with 323 being the first run, right?

Any drivability issues? Does it feel 100% stock smooth?

[Delnari]

You do feel the extra torque for sure. The 1st, 2nd, 3rd gear pulls are much harder than before. For now it is just perfect. Once Dinan releases their new tune I will sell my BMS and get the software update from Dinan.

[HX_Guy]

Sorry I meant how is drivability, did it lose any of the stock smoothness (like does it idle any rougher at all, or are there any negative signs that you have the mods)?

[Delnari]

The only thing I have notice is after a cold startup, the throttle tip has a slight hesitation but immediately goes back to normal throttle control. Not sure the BMS is causing this or normal for the car without the BMS as I haven't really did a lot of cold starts of the car when in factory only parts as I went with these upgrades right away.

The drive of the car is perfectly fine and operates smooth other than the boost comes on stronger than before.

[Delnari]

Follow-up, the N55 Stage 1 is removed and awaiting deliver of the Dinan Stage 1 in the next several days. Scheduled to go back to the same Dyno on 8/22 after I install the Dinan and see what new numbers I get.

[phoenixbmwlife]

Originally Posted by Delnari

Follow-up, the N55 Stage 1 is removed and awaiting deliver of the Dinan Stage 1 in the next several days. Scheduled to go back to the same Dyno on 8/22 after I install the Dinan and see what new numbers I get.

Interested in seeing these results