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W126Club.nl • POLL Backfire's (aangepast, graag controle) : LPG Specifiek
Pagina 1 van 1

POLL Backfire's (aangepast, graag controle)

BerichtGeplaatst: 18 aug 2010, 20:40
door PetrolM
Dames en Heren,

Ik wil een onderzoekje doen naar backfire' s. Niet het ontstaan in dit geval maar naar hoeveelheid in verhouding tot type W126.
Ik heb nml het idee (kan er behoorlijk naastzitten natuurlijk) dat het meer bij de V8 dan de 6 cil lijn voorkomt.

Re: POLL Backfire's (aangepast, graag controle)

BerichtGeplaatst: 27 aug 2010, 13:24
door PetrolM
Nou de poll geeft als tussenstand al aan dat er niet veel verschil is tussen de 6 en 8 cilinders. Wel opvallend, en eigenlijk wisten we dit al, dat slecht/achterstallig onderhoud een belangrijke oorzaak van de backfire is/kan zijn.

Wordt vervolgd.

Re: POLL Backfire's (aangepast, graag controle)

BerichtGeplaatst: 20 sep 2010, 12:22
door PetrolM
De voorlopige tussenstand geeft nu aan:

13 leden hebben een backfire gehad (weet natuurlijk niet wat de leden die de poll niet ingevuld hebben, hebben meegemaakt) en 11 leden geen backfire.
De V8 komt er zo te zien net iets ongunstiger uit, mogelijk door de langere afstand tot de verdamper, en meer volume aan leidingen.
Opvallend is wel dat de meeste leden al aangeven dat de oorzaak onderhoud gerelateerd is.
Dit werd natuurlijk al veelvuldig op het forum genoemd, maar nu is het ook onderbouwd.
Ik laat de poll nog een tijdje open staan, zodat er nog leden kunnen reageren, cq poll invullen.

Re: POLL Backfire's (aangepast, graag controle)

BerichtGeplaatst: 20 sep 2010, 13:02
door Bertorelli

Re: POLL Backfire's (aangepast, graag controle)

BerichtGeplaatst: 20 sep 2010, 13:08
door PetrolM

Re: POLL Backfire's (aangepast, graag controle)

BerichtGeplaatst: 03 okt 2010, 12:26
door PetrolM
Graag aandacht voor de poll.
Hoe meer mensen hem invullen, hoe zuiverder de gegevens worden.

Tussenbalans geeft in elk geval al aan dat (slecht) onderhoud de grote veroorzaker is van de backfire's. En het lijkt er op dat de V8 iets meer last heeft dan de 6 cil. lijn.

Rob.

Re: POLL Backfire's (aangepast, graag controle)

BerichtGeplaatst: 04 okt 2010, 10:08
door Bertorelli

Re: POLL Backfire's (aangepast, graag controle)

BerichtGeplaatst: 06 feb 2011, 20:52
door PetrolM

Re: POLL Backfire's (aangepast, graag controle)

BerichtGeplaatst: 07 feb 2011, 03:18
door Vlim
Schade bij een backfire is hoger bij de V8 vanwege de constructie van het inlaattraject. De gasklep zit relatief laag en werkt als een syfon (zie WC-pot), waardoor een aanzienlijke hoeveelheid gas/lucht in het inlaatspruitstuk wordt opgesloten, wat bij een backfire meer schade geeft dan bij een 6-cylinder.

Verder dien je rekening te houden met het verschil tussen de M110 en de M103. De M103 is een modernere motor die beter overweg kan met LPG dan de M110 (zeker qua klepspeling). De vroege M103-motoren hadden geen geharde klepzittingen en zijn dus niet zonder modificatie geschikt voor langdurig gebruik op LPG. Mercedes-Benz NL liet in de beginjaren van de M103 de koppen voorzien van geharde klepzittingen als ze LPG inbouwden.

Probleem #1 bij Nederlandse inbouw is het gebruik van een stelschroef voor de 'fijnafstelling' en vaak een verdamper met te weinig capaciteit, waardoor de prestaties ook achterwege blijven. Verder is natuurlijk ook het verleden van de auto geen onbelangrijke factor.

De Mercedes-Benz dealers hebben de afgelopen jaren meer stuwschijven verkocht dan toen de W126 nog gemeengoed was. Zegt ook wel iets over de backfires :)

Je kunt de LPG-rijders in 2 categorieen verdelen: Zij die een backfire hebben gehad, en zij die hem nog gaan krijgen. :mrgreen:

Re: POLL Backfire's (aangepast, graag controle)

BerichtGeplaatst: 27 maart 2011, 22:22
door LEISTER
Gassers

Misschien zijn het geen 2 maar 3 catagorieen!!

Er zullen er wellicht, zoals ik, ook bij zijn die voor een gasdampinjectie kiezen en als het goed is krijgen die "GEEN" backfire.

Mijn 300SE gaat binnenkort naar Ad Ruissen in Broekland. Hopelijk gaat de gasdampinjectie brengen wat ik er van verwacht. Een goed lopende auto en "GEEN" backfire's

Zou het iets zijn om op dit forum de div. systemen eens goed tegen het licht te houden? Ook zou het wel zo eerlijk zijn om bedrijven die andere technieken aanbieden ook eens wat vaker te vernoemen. Ik vind dat er wel heel vaak en makkelijk richting Eindhoven wordt gewezen en namen worden genoemd als iemand naar een inbouw station vraagt. Niet dat daar iets mis mee is maar we doen andere wel tekort. Maar dat is mijn mening.

Misschien dat ik mijn ervaringen over de inbouw van het gasdamp injectiesysteem op deze site moet zetten. Vanuit aan andere club is er in ieder geval interesse.

Groeten LeiSter

Re: POLL Backfire's (aangepast, graag controle)

BerichtGeplaatst: 28 maart 2011, 02:32
door Vlim
<was mezelf aan het herhalen>

Maar goed. Reden #1 blijft een te beperkte (stelschroef)afstelling van de LPG-toevoer.
Regel de LPG-toevoer electronisch en je hebt veel minder dol.