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Author Topic: MED9 HPFP & LPFP Control  (Read 62806 times)
bk56190
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« Reply #150 on: May 18, 2018, 04:53:15 PM »

Hey guys,

Does anyone know the characteristics of LOBA HP25 for 2.5TFSI ? (pistons size ? FP size ? )
« Last Edit: May 19, 2018, 01:07:25 AM by bk56190 » Logged
Bitshifter
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« Reply #151 on: June 02, 2018, 01:34:40 AM »

I think it´s the same size like the autotech kit (11,5mm piston diameter).
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bk56190
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« Reply #152 on: June 03, 2018, 10:08:27 PM »

Few day ago, Loba said me 12.1mm.
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bk56190
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« Reply #153 on: August 20, 2018, 12:01:45 PM »

Hello,

HPFP from LOBA received and installed on my 2.5TFSI.  Loba said me piston size is 12.1mm, so i use  these values :
first :
- RQUAHDPK : 36,6mm²
- SKHDPMX : 4,5mm
- VHDP : 368cm3
=> actual pressure rail > requeted

then :
- RQUAHDPK : 36,6mm²
- SKHDPMX : 4,5mm
- VHDP : 348cm3
=> same result, actual pressure rail > requeted

Ori values are :
- RQUAHDPK : 25mm²
- SKHDPMX : 4,5mm
- VHDP : 251cm3

Do I need to reduce SKHDPMX  ?

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bk56190
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« Reply #154 on: August 21, 2018, 12:12:41 PM »

I try SKHDPMX =5 (Loba said to me), but same behaviour  Huh
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pocoloco
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« Reply #155 on: December 02, 2018, 05:49:59 PM »

any updates in here?

i´m also actually thinking about an upgrade hpfp for an rs3, but want to buy one where measurements are clear.

i asked autotech for dimensions but got no answer, anything new to the loba hpfp?

or any other advices whitch manufacturer to use?
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birchbark506
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« Reply #156 on: December 03, 2018, 07:57:04 AM »

Vis motorsport makes a good hpfp
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pocoloco
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« Reply #157 on: December 03, 2018, 02:32:54 PM »

Vis motorsport makes a good hpfp

hm, everything out of stock in their shop, so not really an option.
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bk56190
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« Reply #158 on: December 20, 2018, 03:02:48 AM »

VIS doesn't seem to be always good quality.
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Richym
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« Reply #159 on: December 20, 2018, 09:57:10 AM »

VIS doesn't seem to be always good quality.
I’ve fitted quite a few now with no problems


Sent from my iPhone using Tapatalk Pro
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Piar
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« Reply #160 on: December 22, 2018, 09:22:07 PM »

Hello,

HPFP from LOBA received and installed on my 2.5TFSI.  Loba said me piston size is 12.1mm, so i use  these values :
first :
- RQUAHDPK : 36,6mm²
- SKHDPMX : 4,5mm
- VHDP : 368cm3
=> actual pressure rail > requeted

then :
- RQUAHDPK : 36,6mm²
- SKHDPMX : 4,5mm
- VHDP : 348cm3
=> same result, actual pressure rail > requeted



Do I need to reduce SKHDPMX  ?



Hi! have you solved problem?

I have also bought loba hpfp and see same problem
But if loba said that piston size is 12.1mm
math have to be

RQUAHDPK : (12.1/2)square=36.6025
- SKHDPMX : 4,5mm(it could be change just in case if you changed your camshaft sprocket(which drives hpfp))
- VHDP : 36.6025*pi*4,5=517,4568
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bk56190
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« Reply #161 on: December 23, 2018, 12:17:14 AM »

Now, with more boost, more fuel (ethanol), I have put a specified rail pressure of 140bar, actual is around 130.

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Bitshifter
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« Reply #162 on: January 24, 2019, 08:32:48 PM »

Is there a solution for the rail pressure problem?

Just another question: does it make sence to raise pressure >130bar (with aftermarket PRV)?

HW
engine CDLF
IE HPFP upgrade kit (9.8mm piston)
HPFP upgraded with roller kit
LPFP+controller TTRS
PRV RS4
injectors stock CDL
SW
KFPRSOLHKS = 132bar
KFPRSOLHMM = 132bar
KFPRSOLHOM = 132bar
KFPRSOLKH = 132bar
KFPRSOLOFF = 132bar
KFPRSOLSCH = 132bar
KLLFPRSG = 140bar = 0,540155
KLPRMAX = 132
VHDP = 407,3
RQUAHDPK = 24
SKHDPMX=5,4

PGBDVHDO = 140bar
KFFLAF= stock from TTRS
KFNTBKS =stock from TTRS

KRKTE=0,02880







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Tezotto01
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« Reply #163 on: February 18, 2019, 08:42:11 AM »

Is there a solution for the rail pressure problem?

Just another question: does it make sence to raise pressure >130bar (with aftermarket PRV)?

HW
engine CDLF
IE HPFP upgrade kit (9.8mm piston)
HPFP upgraded with roller kit
LPFP+controller TTRS
PRV RS4
injectors stock CDL
SW
KFPRSOLHKS = 132bar
KFPRSOLHMM = 132bar
KFPRSOLHOM = 132bar
KFPRSOLKH = 132bar
KFPRSOLOFF = 132bar
KFPRSOLSCH = 132bar
KLLFPRSG = 140bar = 0,540155
KLPRMAX = 132
VHDP = 407,3
RQUAHDPK = 24
SKHDPMX=5,4

PGBDVHDO = 140bar
KFFLAF= stock from TTRS
KFNTBKS =stock from TTRS

KRKTE=0,02880







Has anyone managed to solve this problem?
After updating the HPFP I have the same problem, at high rotations the pressure rises to the point of shutting off the engine due to excess pressure.



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Bitshifter
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« Reply #164 on: February 19, 2019, 10:42:41 AM »

Has anyone managed to solve this problem?
After updating the HPFP I have the same problem, at high rotations the pressure rises to the point of shutting off the engine due to excess pressure.


In your case it shoud be the LPFP controller!
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