09-16-2021, 01:10 PM | #441 | |
Captain
175
Rep 643
Posts |
Quote:
__________________
M235i rwd 6mt
|
|
Appreciate
0
|
09-16-2021, 02:23 PM | #442 |
Lieutenant
238
Rep 413
Posts |
BootMod3 Stage 2+ hpfp 91Oct and 93
MHD Stage 2 hpfp 93Oct
__________________
2017 440i F36 - Drexler LSD - B58TU HPFP - MHD Stage 2 - xHP - 200 Cell DP - MPE
|
Appreciate
0
|
09-27-2021, 06:51 AM | #443 | |
Second Lieutenant
82
Rep 203
Posts |
Quote:
Bonus question (to Kern?): for a mere OTS stage 2 tune, on pump gas, which pump would be recomended ? TU or Dorch stage 1 ? Thank you!
__________________
340 xdrive 6MT - HJS catted DP - MPPSK - TU HPFP - 550i clutch - VAC monoball control arms - Eibach springs - H&R antiroll bars - AutoSolutions SSK - Brembo HP2000 pads
Corvette C6 Z06 Z07 |
|
Appreciate
0
|
09-27-2021, 07:47 AM | #444 |
Brigadier General
1161
Rep 3,189
Posts |
An upgraded HPFP will do nothing to gain you power unless you are running out of fuel. The OTS tunes on pump gas are octane limited. It's only once you start running more than E30 do you run out of fuel and need a bigger HPFP. Stage 2 vs Stage 2+ for 91 or 93 is just marketing.
|
09-29-2021, 07:13 AM | #445 |
New Member
4
Rep 10
Posts |
I just upgraded to a Dorch Stage 2 HPFP. I just want to make clear that the difference between BM3 Stage 2 and Stage 2+ is not considerable. I barely noticed it. For me this wasn't a let down because I only did the HPFP to get ready for a turbo. If you're not going to upgrade your turbo a TU pump is more than enough.
|
Appreciate
0
|
09-29-2021, 07:23 AM | #446 | |
New Member
4
Rep 10
Posts |
Quote:
Personally I went big and just got the Stage 2, that way no matter what I'll never have to buy a new HPFP if I want more power.
__________________
2016 BMW 340i xDrive
BM3 Stage 2+ E30 VRSF Catless DP Dorch Stage 2 HPFP xHP Stage 3 |
|
09-29-2021, 02:04 PM | #447 | |
Major
811
Rep 1,453
Posts |
Quote:
According to BM3 gain percentages, that lines up. I dyno'd at ~440awhp and ~515lb-ft on Stage 2 E30. Using their percentages, I'd be at ~455whp. Hard to notice an additional 10-20hp but there's a slight gain for sure. I think the TU pump is fine for something like a VTT GC if your goal is ~500whp, maybe a bit more. But Dorch stage 2 is for sure the way to go with a bigger hybrid or full frame big turbo.
__________________
2022 CT4-V Blackwing 6-speed
SOLD: 2016 340i xDrive 6-speed DAW v2.5 turbo E40 | Dorch S2 | VRSF DP | MST intake | AWE catback | 335is clutch | CSF heat exchanger | RK Autowerks intake manifold | Orange M Perf Brake Kit | KW Street Comfort coilovers | GTS taillights V2 |
|
Appreciate
0
|
10-07-2021, 03:12 AM | #449 |
Second Lieutenant
82
Rep 203
Posts |
Thanks guys, all what you say makes sense.
That being said, MG FLasher OTS map version 2.14 were noticeably slower than version 2.12. The explanation was, if I understood correctly, that the OEM HPFP was not totally up to the task in low-mid range, and therefore some users were seing pressure drop in fuel injection. If MG modified their tune to be less aggressive even for a mere stage 1 on pump gas, I guess that you could benefit from an upgraded HPFP even for a stage 1 or 2 on pump gas. Or did I miss something ?
__________________
340 xdrive 6MT - HJS catted DP - MPPSK - TU HPFP - 550i clutch - VAC monoball control arms - Eibach springs - H&R antiroll bars - AutoSolutions SSK - Brembo HP2000 pads
Corvette C6 Z06 Z07 |
Appreciate
0
|
10-07-2021, 07:08 AM | #450 | |
Cheapskate
4447
Rep 4,993
Posts |
Quote:
I've seen the same thing on MHD and BM3. They made an update and some people see rail pressure drops even on the pump gas maps. I think there's just a little variation in performance from car to car. |
|
Appreciate
0
|
10-07-2021, 10:01 AM | #451 | |
Second Lieutenant
82
Rep 203
Posts |
Quote:
I contacted MG Flasher team in the meantime, and they just responded me. According to them, the OEM pump can support tunes up to stage 2. But stage 2, which exceed 610 - 630 NM with safe level AFR ratio will run on the border of OEM HPFP flow rate efficiency. Therefore, they recommend an upgraded HPFP for stage 2 or E30. The newer OTS map versions 2.14 and 2.16 took into account the problem with OEM HPFP and can be ran more efficiently with the OEM pump. Finally, for my personal application/setup, the TU pump should be enough.
__________________
340 xdrive 6MT - HJS catted DP - MPPSK - TU HPFP - 550i clutch - VAC monoball control arms - Eibach springs - H&R antiroll bars - AutoSolutions SSK - Brembo HP2000 pads
Corvette C6 Z06 Z07 |
|
Appreciate
0
|
10-08-2021, 01:01 PM | #452 |
Cheapskate
4447
Rep 4,993
Posts |
I made a DIY for the Dorch HPFP. Hope this helps.
|
Appreciate
1
disintegrator66403.50 |
10-14-2021, 02:43 PM | #453 | |
Private First Class
64
Rep 128
Posts |
Quote:
__________________
2018 340ix AWD B58 8AT | MGflasher ST1 |
Instagram: andreykrop Youtube: DronaMashina |
|
10-15-2021, 12:06 PM | #454 |
Cheapskate
4447
Rep 4,993
Posts |
Adding another video to help people decide what HPPF is right for them.
|
Appreciate
1
disintegrator66403.50 |
10-21-2021, 04:45 PM | #455 |
New Member
0
Rep 6
Posts |
Part number
hi!
Does anyone know if the part number has changed? 1351-8-631-642 to 1351-8-489-446, I received mine today with this number and looks exactly the same thanks! |
Appreciate
0
|
10-22-2021, 07:10 AM | #456 |
Cheapskate
4447
Rep 4,993
Posts |
I don't see that part number in any BMW database.
|
Appreciate
0
|
10-22-2021, 11:15 AM | #458 |
Private
21
Rep 51
Posts |
I'm finding the same, although stage 2+ for me is pushing beyond the limits of octane for 99ron, so I have to put in 5l ethanol per tank full to clean up timing. I was around 0.4 quicker than stage 2 100-200 without ethanol, and 0.8 quicker with ethanol
|
Appreciate
1
M140_BCS237.50 |
10-22-2021, 12:04 PM | #459 | |
Lieutenant
238
Rep 413
Posts |
Quote:
Way too many timing corrections and knock detected. I also added 10% pure ethanol and it pulls stronger up top. Ignition timing has basically no corrections. Not had chance to time the 100-200 times but it feels much quicker in the higher rev range.
__________________
2017 440i F36 - Drexler LSD - B58TU HPFP - MHD Stage 2 - xHP - 200 Cell DP - MPE
|
|
Appreciate
0
|
10-22-2021, 12:53 PM | #460 |
Cheapskate
4447
Rep 4,993
Posts |
That's probably why I can't find it. They don't sell the G20 320i in the US. But assuming it has the same B48 as the 330i then it should come with the same TU hpfp. So I'm not sure about what makes that part different.
|
Appreciate
0
|
10-22-2021, 05:23 PM | #461 |
Second Lieutenant
82
Rep 203
Posts |
Hello,
After reading that thread, I bought a b58 TU HPFP. But something caught my attention: the part number is only written on one side, and there is no officiel BMW part number on the other side of the pump. Is that really a TU pump? Edit: the box in which the pump was is a generic Bosch box, so it might just be a general "TU pump" supplied by Bosch, before BMW rebrands it.
__________________
340 xdrive 6MT - HJS catted DP - MPPSK - TU HPFP - 550i clutch - VAC monoball control arms - Eibach springs - H&R antiroll bars - AutoSolutions SSK - Brembo HP2000 pads
Corvette C6 Z06 Z07 |
Appreciate
0
|
10-24-2021, 03:06 AM | #462 | |
Private
21
Rep 51
Posts |
Quote:
There's the Stage 2+ Racegas map as well which I reckon needs about 15l of ethanol per tank to make 100 octane, which I'll use for special occasions/a birthday treat! |
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|