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Thread: LPG conversions

  1. #101
    Senior Member z80's Avatar
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    Quote Originally Posted by AceR View Post
    Fixing it is no problem..Infact I think I'll modify it I'm a top class tradesman if i do say so myself.You wan't to take a look at some of the stuff i've built over the years.I have an extensive engine and car building background and I'm not talking about backyard bolt on a holley and 'bling" stuff either.Just for fun a couple of years ago I built an EFI system for one of my street bikes and used a Megasquirt CPU on it.That was a fun project.
    The only reason I won't be doing the whole job myself is because I don't have an LPG licence and someone has to put the tag on it...
    I'm going to stick with the 425 and run it on gas only.Once I flog the valves out i'll swap them for a set of alloy heads.

    sounds good....

    Make sure you garage the gem every night in a very well sealed garage.

    Put a mozzie zapper in there as well....



  • #102
    Member AceR's Avatar
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    Yee have little faith...

  • #103
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    I am after a LPG Interface cable schematic.

    Trying to get an interface going between my laptop and the Tartarini Evolution computer on my Magna.

    Seller on Ebay from Germany won't reply with postage costs.
    Chap from Viaken Poland wants 40 Euro to send his.
    Surely these thing aren't rocket science.

    I have scoured the net for schematics but have found none

    Anybody with any suggestions?

    Regards Craig

  • #104
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    Purchased an interface from UK $59AU found it to be a simple circuit Max232 interface.


    Regards Craig

  • #105
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    Default lpg and damage to cat coveters

    can a rich or lean mixture on lpg cause damage to a cat like petrol can?

  • #106
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    No.

    In Australia we can also legally remove the cat in straight LPG vehicles.

    Edit; Forgot to mention this.

    Closed , dual fuel LPG systems regulate the air/fuel mix via the lambda sensor. When switched to LPG the ECU is still gathering these readings which tend to read as lean in general petrol settings, the ecu with time is richening the petrol settings even though you are running LPG at the time.

    The problems occur when switching over to petrol, the engine will run really rich (like a dog). This situation is really killing the cat.
    Regularly running the car on petrol helps keep this under control with my Ford however we tend to do a ECU reset on every service which puts the ECU back to factory default.

    We rarely run on petrol, its only to get to a servo after running out of gas. After a reset the car runs well on both fuels, 5000km after the service you car smell the petrol fumes out of the exhaust, nearer to service (10,000km) you can feel the rough idle from a rich mixture. Its defiantly killing the cat at this point.

    Regularly running on petrol or regularly resetting the ECU normally avoids this predicament.
    Last edited by Godzilla; 09-11-08 at 12:25 PM.

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