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Thread: Turbo upgrade

  1. #1
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    Turbo upgrade

    Not sure this should be here or in the modified section.

    Finally getting around to doing a turbo upgrade on my 300Tdi! I thought of going the VGT type, but too easy and boring for myself.

    I have a Compound Bi Turbo set up from a Mercedes Sprinter that should make a difference.

    I have worked out the position for it, and have started on the new manifold flanges.
    Attached Images Attached Images

  2. #2
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    Sep 2015
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    Nice!
    What's the advantage over the stock turbo? Faster spool up - more boost at lower RPM? More airflow in general?
    97 Disco 300Tdi, front & rear diff locked, hybrid turbo, full width intercooler, cranked front & rear arms,
    2” dobinson coils, terrafirma shocks, HD steering arms, diff guards, rocksliders, domin8r winch, tank guard

  3. #3
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    It has 2 turbos, one small for low rpm boost, then the larger one takes over. No Lag at all when used on the Mercs, so should be the same with 300cc more capacity.

    They have an exhaust bypass/wastegate between the exhaust turbines, but both are always spinning. And a bypass valve in the boost side between them also.
    Seamless air delivery. I have made 2 dawes valves to control the vacuum actuators, and also have a boost pressure actuator from another turbo that i may try also to get the boost curve suitable.

  4. #4
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    Some progress pics.
    Attached Images Attached Images

  5. #5
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    Exhaust Manifold completed. Also support brace that bolts to where one was fitted in its original location. Other end bolts to 2 M8 threads on the side of the Block that were unused.
    Attached Images Attached Images

  6. #6
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    Have you got it together and on the road yet?

    Be really interested to see how that type of turbo goes on a 300 TDI.
    "Dolores" my '97 model 300tdi D1 and "Donkey" my '20 RE Himalayan.

    Previous: ‘00 D2, '04 110 wagon, '96 D1 and '95 110 ute, plenty of other bikes and cars too :angel:

  7. #7
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    Not yet on the road. Its my daily driver, so i have to plan carefully when to work on it. Doing a workshop extension also atm.

    Im really looking forward to getting done, i expect virtually no lag from idle which should make it very driveable and responsive.

    I will post the progress as it happens.

    What size front mount intercoolers are people using? Not alot of room in there. Im thinking of going for a same side inlet outlet setup.

  8. #8
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    Aug 2015
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    Most common intercooler upgrade seems to be the double core Allisport ones - fits in the original spot with a bit of squeezing I think, may have to trim the top brace.

    If you've got Facebook, and you're not already on it, check the Tdi Performance group run by fourby.co.uk - a wealth of knowledge there and I'm sure they'd love to see what you're up to with this!

    Land Rover Tdi Performance Page

  9. #9
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    No reply for getting access to the Tdi group on facebook unfortunately. Was keen to see what others are up too!

    Im waiting on components to make the exhaust system. Also the oil lines, one for each turbo.

    Does anyone know the thread size for the oil feed gallery in the block? I should have checked it last time i had it apart.

  10. #10
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    I requested to join too. I took over a week to come back approved. Maybe check again.
    L322 tdv8 poverty pack - wow
    Perentie 110 wagon ARN 49-107 (probably selling) turbo, p/steer, RFSV front axle/trutrack, HF, gullwing windows, double jerrys etc.
    Perentie 110 wagon ARN 48-699 another project
    Track Trailer ARN 200-117
    REMLR # 137

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