11-15-2018, 07:50 AM | #1 |
New Member
0
Rep 6
Posts |
M2 LCI power issues - knocks
Hi all
I am having some issues with my M2 About 8 months ago, I decided to start modding my car Started replacing the DP by an HJS 300 cells and my IC by Wagner Evo2 Comp Tuner did a remap and all went well. It was putting down 440bhp (350whp) and 585Nm of torque. Awesome! This setup ran for almost 12k kms until the moment I came across with some tuners who were able to extract a bit more from the engine with a simple LPFP and piping replacement Thus, I ordered charge&turbo pipes from Forge and a Walbro450 hopping to achieve a bit more Those parts were installed and it was the moment when the nightmare began! We put the car on the dyno and it is making less power than before with the same file. We checked the timing advance and turbo pressure and above 4000rpms both drop significantly We also noticed that the fuel pressure drops above 4000 rpms from 194 bar to 130 bar. The OEM target is 190 flat from 4000 rpm onwards. We decided to put back the old LPFP and re-dynoed it and got the same figures Next step will be to put back the old pipes and see if this gets solved We have tested it with the spark plugs and coils from another M2 and did not solve Any clue? Currently my BMW M2 LCI has 19k kms on its odometer Thanks in advance Cheers RF Last edited by Rife; 11-15-2018 at 08:17 AM.. |
11-15-2018, 10:22 AM | #4 |
Captain
259
Rep 699
Posts |
It has to be something that happened during the install of the new parts. Kinked fuel line? They just need to carefully go over everything they touched. If they were competent you shouldn't have to be going on a forum for help. Don't take anything that they did or said for granted. It's time to start double checking everything.
|
Appreciate
0
|
11-16-2018, 12:46 AM | #6 |
Colonel
3179
Rep 2,577
Posts |
It isn't necessarily an issue with the newly installed hardware.
First of all, dyno reads differently at different times. You don't expect power gains please from pre and post intercooler piping and LPFP. No one does. The drop of rail pressure down to 130bar (1900psi) is at the edge but most of time it's not low enough for DME to pull back load. And timing falling is a direct result of the lack of octane for the boost/IAT that you're dealing with. It looks to me the software may be flawed in your particular case in the first place. I would be asking to adjust it.
__________________
Lemania 2320
|
Appreciate
0
|
11-16-2018, 04:34 AM | #7 |
New Member
0
Rep 6
Posts |
thanks for your replies
Tuner has been asking for more fuel at the top end, but it seems that HPFP fails to deliver even the OEM target (190) I suspect that the OEM HPFP is failing. After 12k kms of being on its limit plus the new demand and more capacity of the Walbro450, it is, probably, causing this failure Even with the OEM map struggles to deliver the fuel I always fill up the tank with 98RON. Moreover, we added an Octane booster |
Appreciate
0
|
11-16-2018, 10:07 AM | #8 | |
Private First Class
68
Rep 175
Posts |
Quote:
Maybe the first tests were just wrong and now you are not able to reprpduce since the dyno is now correctly dialed in? |
|
Appreciate
0
|
11-16-2018, 10:25 AM | #9 | |
Second Lieutenant
199
Rep 244
Posts |
Quote:
You're correct about that hp. No N55 makes 440 crank hp with stock turbo and fuelling, it's impossible, after reading that i really didnt take this post seriously. |
|
Appreciate
0
|
11-16-2018, 11:57 AM | #10 |
New Member
0
Rep 6
Posts |
image attached
|
Appreciate
0
|
11-16-2018, 01:26 PM | #11 |
Private First Class
68
Rep 175
Posts |
This looks like a stock power curve, definitly not making 440hp at the crank with 350ish at the wheels. The powerdrop and the power peak is way too stock'ish. Wondering if the software ever has worked correct.
Edit: have you ever done a baseline run? |
Appreciate
0
|
11-16-2018, 01:42 PM | #12 |
New Member
0
Rep 6
Posts |
I will look for it
Nevertheless, my car was running 100-200kph in 9,25s. Stock map on the same road and pretty much the same temperature outside did 10,93s Both measures were taken with M Analyzer via OBD port |
Appreciate
0
|
11-16-2018, 01:52 PM | #13 |
Private First Class
68
Rep 175
Posts |
|
Appreciate
0
|
11-16-2018, 08:05 PM | #15 | |
Colonel
3179
Rep 2,577
Posts |
Quote:
Wheel TQ/HP should be the crank curve MINUS Drag curve. And in OP's case, WTQ and WHP would have shown a very very quick falling down.
__________________
Lemania 2320
|
|
Appreciate
0
|
11-17-2018, 01:19 AM | #16 | ||
Private First Class
68
Rep 175
Posts |
Quote:
|
||
Appreciate
0
|
Post Reply |
Bookmarks |
|
|