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Thread: Building 4age

  1. #11

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    Im pretty sure the biggest you can go with OEM ECU is 264 otherwise the vac signal on your MAP wont read.

    Just remember this, a bigport unless it has been completly rebuilt is a 20 year old engine, its amazing how crisp a bigport feels completly rebuilt and freshened up, even with out any mods.

    There is a company here in Artarmon (North Sydney) who does porting and polishing:

    AGA Engineering
    (02) 9906 2966

    Fairly well priced and good blokes to deal with, one warning, dont sound like a NOOB on the phone!

  2. #12
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    cool,
    what u sayin i sound like a NOOB? . How long u reckon it takes to do a port and polish? I dont wanna use standard comp with the new cams, dont want them lumpy or whatever, i want it done and workin perfectly.

  3. #13
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    i only ported my head for about an hour or so.. enough to make a difference..

    on the inlet side we opened up the roof and floor to match the new ITB inlet mani, knife edged the port stem, took a bit out the the valve bowl, and tear dropped the guides.. then shaved 25 thou off it.. and the exhaust side i just lifter the roof and ran a smoothing tape inside it all

    (all work done by myself and Craig at extreme engineering)

  4. #14
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    how did u figure that out??
    haha
    $ per kw ur sayin n/a is cheaper?

  5. #15
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    damn,
    wish i was is brisbane.........

  6. #16
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    how did u figure that out??
    haha
    $ per kw ur sayin n/a is cheaper? [/b][/quote]
    i thought about that guess your right $ per Kw turbo looks lik a better option but from what i was thinking is that if your starting with a 4ac the inital cost of a turbo looks to me like a much more expensive option getting a 4agze and then building it up for there.

    but putting NA build up into consedieration i guess if you had a 4age, getting it ported polished, cams, valves... etc all new, it would be around the same cost as getting a 2nd had turbo set up.

  7. #17
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    you could go a 7age. ive been reading up on it, you get the 7afe 1800cc bottom end, and put your head and everything else on to it, and while your at it change the pistons and cams.

    the the over all horse power gain isnt very much jsut swaping the bottom end but there a large torque gain, and in a 1000kg car thats all you really need, and i guess forged pistons, cams would help you out a bit too. that what ive read anyway.

    it seams like a cheeper option but a good one, something defently different too.

  8. #18
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    sexy 16's doin a 7a conversion, dunno what else hes got on it tho,forgot to ask him, so if the ze isnt much of a desirable option for NA i'll prob just keep the bigport, or do importers sell freshly rebuilt 100kw engines?

  9. #19
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    Johnny, if you are on a tight budget. I will suggest you to use these.
    20V silvertop block, rods.
    100kw pistons.
    86kw head.

    give it a try, shouldnt cost you more than 3k to get all those gear and rebuild then.
    There is a guy selling a set of HKS cams on this forum at the moment.
    You might as well grab them and put them in.

  10. #20
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    wouldnt i need that new water pump thing for the 20v bottom end?

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