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Thread: Which injectors to replace existing? Beautey help please

  1. 25th February 2014, 10:53 PM #1
    Roverlord off road spares
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    Which injectors to replace existing? Beautey help please

    I currently have a zavoli Allessi system. The injectors and all wiring is installed underneath the upper intake. So access to any components requires the top intake to be removed. Over the years engine heat and the force of being crunched underneath had taken it's toll on hoses and wiring. I have the injector hoses the supply lines to the injectors, the injector wiring plugs and fuel injectors for petrol all jammed underneath. It looks visually great, but as said it has it's problems.
    I want to externally mount the injectors on to the top air intake. The Zavoli injector wiring is worn. I noticed some OVL 4 injector banks being sold on ebay would 2 of these work as replacements?
    LPG Injectors SET Brand NEW Omvl REG 4 CYL SET Made IN Italy | eBay
    regards, Mario

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  2. 26th February 2014, 07:56 AM #2
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    You can't just replace injectors with any other type as their operating characteristics (coil resistance, plunger inertia, flow rate etc) are different. You will need to do a full retune when you've installed the replacement injectors. You can select from a range of different injector types in the Zavoli software, one of them will match the OMVL injectors. I know this as I fitted a Zavoli ECU to a 5.7 Holden fitted with an OMVL system. Can't remember which type it was. Trial and error gets you there.

    I currently have a Zavoli system on my little Merc with some oddball injectors, they work fine. I had a bloke come in with a BA Falcon the other day that the original fitter had upgraded from the block type Zavoli injectors to the newer rail type. The fitter idiot had forgotten to retune the system and the LPG mixtures were around 30% out. Changeover was awful. The original fitter has lost another customer.

    Oh and all injectors need a range of restrictor jets to set them in the correct range. Get them wrong and your tuning will be difficult. If you use the autocalibration function in the software it tells you how far off optimum your jet sizes are.
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  3. 26th February 2014, 01:06 PM #3
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    Damn, i knew it was too simple an idea and would be a head ache.

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  4. 26th February 2014, 04:06 PM #4
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    Quote Originally Posted by Roverlord off road spares View Post
    Damn, i knew it was too simple an idea and would be a head ache.
    Mate your just not happy unless your working on something with that car And as usual something goes pear shaped
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  5. 26th February 2014, 04:18 PM #5
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    Beautey to keep things simple, would I be better just finding a rail zavoli injector. Also the print on the existing injectors would id the flow rate etc? and provide info i need.
    As said earlier i need to take the top off again to look

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  6. 26th February 2014, 04:41 PM #6
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    Do yourself a big favour and buy the software and tuning cable. Then you can change whatever parameters you like, read errors, fine tune etc.

    Example
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  7. 26th February 2014, 05:43 PM #7
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    Quote Originally Posted by bee utey View Post
    Do yourself a big favour and buy the software and tuning cable. Then you can change whatever parameters you like, read errors, fine tune etc.

    Example
    Beautey,OK did as you command, just bought it,now I'll have to find out where to plug it in.
    Regards, Mario

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  8. 26th February 2014, 05:46 PM #8
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    Quote Originally Posted by rangieman View Post
    Mate your just not happy unless your working on something with that car And as usual something goes pear shaped
    Your right Chris! I have too much time on my hands, since you won't come out fishing with me, I have to amuse myself some how.

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