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Thread: Rebuilding a rebuilt 4AGE. . .

  1. #1
    Toymods Club Member Backyard Mechanic
    Join Date
    Jan 2007
    Location
    NSW
    Posts
    340

    Default Rebuilding a rebuilt 4AGE. . .

    Hi . . .

    I'm running a Bigport with Quads that was rebuilt ohhh; say 10-15K km ago.

    I'd like to redo the bottom end with higher compression pistons & would like to know if I need to send the block out to be completely redone (i.e. disassembled / hot-tanked / re-honed / crank re-checked & new bearings installed etc or whether I can get away with a DIY hone (or just drop off block to a Machine shop & request a re-hone).

    PS: Haven't rebuilt a block before but have a stand, a hone and prepared to Google . .

    Would also like opinions regarding OEM V Forged pistons. AFAIK car will stay a road-car but with occasional track work so I don't see the need for Forged pistons. I am leaning towards late 16V / Small-port 10.3: 1 pistons BUT would like to know if there are any other OEM pistons (no larger than 82.0 mm) with higher compression that are compatible with 4AGE.

  2. #2
    Toymods Club Member Domestic Engineer
    Join Date
    Oct 2009
    Location
    NSW
    Posts
    794

    Default Re: Rebuilding a rebuilt 4AGE. . .

    Aftermarket ECU?

    What comp ratio do you want?

  3. #3
    Toymods Club Member Backyard Mechanic
    Join Date
    Jan 2007
    Location
    NSW
    Posts
    340

    Default Re: Rebuilding a rebuilt 4AGE. . .

    Good Question. . .

    Highest feasible on 98 RON I guess. . .

    Will be getting billet rods; ARP rod bolts but retaining cast pistons as car will mainly be used on public roads.

    AFAIK (cast) piston choices for upping compression are either;

    1. OEM Smallport 4AGE 16V
    2. OEM Silvertop 4AGE 20V
    3. OEM Blacktop 4AGE 20V

    Or these. . . ?

    4. http://www.toymods.org.au/forums/thr...ew-4AGE-piston

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