I found that methane has higher octane than methanol and can be injected witout problems in the air intake in diesel cycle engines (to get more power, but also burning less petro/biodiesel because of the mixture). So I'm wondering what are diferences between liquid or gas aspiration injection.
One example of bifuel( gnc diesel) aspiration injection i found
TDI CNG kit installed - TDIClub Forums
High pressure methane/diesel fuel injection is possible and used (bus, train, truck):
Westport
Dear CarMakers: I want my 1.9 HPDI instead of TDI (and if you can replace TDI with Turbo Hidrogen Injection/Intercooled diesel cycle ICE it will be aprreciated).
I'm doing Boost, MAF logs with vag-com and I think that N75 turbo geometry actuator will produce interferences in P&G and fuel savings. My TDI 110 cv 12 years 310.000 km turbo geometry and actuator have better correlation between Especificied and Actual values than my TDI 105cv@138cv 5 years 100.000 km (overboost,underboost and some boost creep) ahahaha
Your car has 250.000 kms and maybe some dirty variable geometry turbo or n75 regulation lag. Did you clean your turbo, intake, EGR, etc.?
But i found a solution to boost in this links (written in spanish, but you will appreciate photos, vag com/vcds logs and part names, etc. and maybe automatic traslation in your languaage could be understood) read all the pages because you will find data logs obtained with months od diference.
Boost valve fitting:
Instalación de Boost Valve en 1.9 TDI 105CV (BKC, BJB, BXE)
Montar Boostvale en TDI
N75 cleaning:
DIAGNOSIS/REPARACION DE LA N75 (GESTION GEOMETRIA DEL TURBO)
N75(electronic sensor regulator boost valve) diagnose and N18 (in maf channel, EGR valve open/close %) using VAg com /VCDS or other obdii tools VAG comaptible.
BRICO:Comprobar y cambiar N75 y N18 - Audisport Iberica
http://www.niovus.com/mecanica/Como%...%20VAG-COM.pdf
I don't know if you n75 valve is in a box with 2 oter valves more like mine (1.9 tdi BXE) if you want and independent one conversion here is a how to:
[Manual] Adaptación N75 independiente en coches con caja de válvulas
user Fran_OC in areavag forums says he obtained fuel savings after good turbo regulation (logs only show fast turbo without lag at low-medium rpms) and other expert m0nch0 says mayba 0.5 L/100km saving.
we know about measrure method importance so I think it's agood think to test if not assessed yet.
I will test in future days but it will be useful if anyone has their own boost maf logs to compare, with and withou boost valve, as fuel consumption with and withou boost valve.
USefulness of engine logging
Usefulness of Engine Logging | Malone Tuning Ltd.
I have Boost Spikes and underboost when full throttle as showed in
About Custom Tuning | Malone Tuning Ltd. because my chip tuning at
www.vimauto-motorsport.com and maybe n75 or vgt clean needed. I will do my research.