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Thread: Convert Tb42e to turbo diesel with efi ?

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    Convert Tb42e to turbo diesel with efi ?

    Hi just wondering if anyone has ever try'd to convert the efi petrol motor to a diesel motor with turbo and running the efi system off the petrol on it ?

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    Expert james008's Avatar
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    Never tried, but the EFI setup from a petrol motor won't suit a diesel as they are completely different motors.
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    No. Just no.

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    if one was to make an adapter plate to bolt the efi intake to the diesel head theorietically it could work or get a custom billet head with the intake schematics of the efi on the diesel head

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    How do you get the parameters/sensors from the TD engine that the EFI Computer requires?
    Where do you get suitable electronic diesel injectors from?
    I can't begine to imagine the cost of the engineering to get the manifold to fit
    How would you program the ECU?
    What possible engineering benefit is there in retaining the EFI intake manifold in the first place?
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    Patrol Freak Parksy's Avatar
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    Petrol is injected into the cylinder at 40psi. Anyone know what diesel is injected at? I dont know exactly what the figure is but it's much higher than 40psi.

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    Up around 200 psi I think

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    Indirect diesels 1500psi +. Direct injection diesels 5000psi +. Common rail up to 45000psi.

    Theres just so many things. Compression ratio (the head). Injecting diesel in an intake runner wont work at all. Diesel is injected at the top of compression stroke. Petrol is injected on the intake stroke.

    Tb42 are chain driven cam. Timing cover totally different. No squirters. Pistons would not cope. No where to put injector pump. The list is endless.
    Last edited by Dales300exc; 5th January 2014 at 04:01 PM.

  10. The Following 2 Users Say Thank You to Dales300exc For This Useful Post:

    BigRAWesty (5th January 2014), the evil twin (5th January 2014)

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    Patrol God BigRAWesty's Avatar
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    Crack pressure of 1600 - 1800 psi ...

    Marginaly different.

    Would be far simpler to just swap engines.
    Compression is different, but unsure if that's controlled by the head..
    So possible different stroke length.
    Is the firing order the same??
    Last edited by BigRAWesty; 5th January 2014 at 03:57 PM.
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    Quote Originally Posted by Parksy View Post
    Petrol is injected into the cylinder at 40psi. Anyone know what diesel is injected at? I dont know exactly what the figure is but it's much higher than 40psi.
    Indirect diesel injection is over 1000 Psi up to about 2000 Psi

    Direct injection significantly higher

    Common Rail injection pressure is 25,000 to 40,000 Psi depending whose system

    Edit... (Sorry guys... didn't mean to replicate info... we were all typing together)
    Last edited by the evil twin; 5th January 2014 at 04:00 PM.
    Dolphins are so smart that within a few weeks of captivity, they can train people to stand on the very edge of the pool and throw them fish.

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