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Thread: linering vs cdb

  1. #1
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    linering vs cdb

    My old 2.5 was a closed deck converted block. my eventual plan is to go down the engine build route again but its got me thinking. Initial thinking is heading down the CDB route again, but the other option is replace the liners. That brings on the questions of,

    Rough cost
    Potential downsides
    Worth doing it over CDB

    anyone got any info/experiences?

  2. #2
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    Factory CDB works. Aftermarket CDB inserts seem to hold well.

    But what you need or whether you need it...how long is a piece of string ?
    speed didnt kill me, but taxation probably will

  3. #3
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    Im prob gonna be aiming for around 550 ish mainly for road but want it to be reliable for 40k miles at least.

  4. #4
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    double post

  5. #5
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    I would not be replacing liners unless there was a specific need or reason for doing so.

    And I dont see you mention any that would justify the risk.
    speed didnt kill me, but taxation probably will

  6. #6
    Senior Member TimH's Avatar
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    My 2.5 scdb ran 500bhp for 50k miles. Maybe I was just lucky, but it's still going strong with the new owner 2 years later.

    If I'd kept it I would have rebuilt and gone for the cdb inserts and aimed for 600bhp without hesitation.

    YMMV
    aka JT Innovations www.jti.uk.com No scoob any more Outlander PHEV GX4h for us now !!

  7. #7
    Senior Member Fai17's Avatar
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    Is your said block linered?
    If there is nothing wrong with it I don’t see the point of changing it.

    Unless you was going to rebuild one then why not try the ej22t block.
    GSR Services Scotland
    Andy Forrest

    2.5 STI GSR Bolt On Turbo & OEM Topmount 450/430 V Power

  8. #8
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    have repaired plenty of blocks with replacement liners and we also have custom HD liners available dependant on power target / use

  9. #9
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    current engine is a stock 2006 sti limited, although not 100% sure exactly what that is, im assuming same as a normal hawk but with a different engine code.

  10. #10
    Senior Member Fai17's Avatar
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    Ahh I see where you are coming from now.
    Basically you have an oem 2.5 hawkeye and want to rebuild it at a later stage.

    VFM then when you take the car off the road obviously before it goes bang, send you engine (long or short) to Alyn and get him to do a cdb conversion on it and rebuild the block with rods and pistons. Keep it to one Engine builder so it’s passed about to here and there. At least that’s what I’d like to do.
    GSR Services Scotland
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    2.5 STI GSR Bolt On Turbo & OEM Topmount 450/430 V Power

  11. #11
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    short version aye, scoobyclinic will be building/fitting etc it what ever route i go

  12. #12
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    i certainly wouldn't see a liner install as an alternative to a CDB on an EJ25 but as an extra safeguard depending on the power target............
    std liners seem to cope with 600 or so

    we can / do offer both and have a "repair" type level as well as HD Ductile Iron custom options for extreme use

  13. #13
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    thanks alyn, sounds like cdb would be sufficient then.

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