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Thread: engineering motor for ae86

  1. #1
    Member 1sik20valve's Avatar
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    Default engineering motor for ae86


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    hey pplz
    desperatly want to change the motor in my ae86
    can sum1 tell me the legal steps to make the new motor legal?
    like engineering and stuff .

    its a bit of a job for the 20v conversion , would a ca18det be roughly the same work as the 20v conversion?
    cause id rather go ca18det cause i got a bigger turbo for it already .

    any help would be good
    cheers guys

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    Senior Member Hen may possibly be a nut's Avatar
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    1 - It helps if you add which state you are in.
    2 - It is best to ring your state authorities and ask them. They are the ones who decide.
    3 - If you're in Vic there is already a few threads covering this. Have a dig.

    Hen

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    Site Supporter Javal's Avatar
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    Agreed with the above, also, decide what you actually want to do with the car / what you want to use it for, as a 20v and a CA don't really share the same characteristics and as such aren't really suited to the same applications, although they are used by various persons for pretty much everything.
    You can have any brew you want... as long as it's a Datsun / Corolla / What is that?

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    Member 1sik20valve's Avatar
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    located in sydney
    the reason y im choosing out of the 2 motor , is cause the 20v is available whenever , and the ca18det i have alot of knowledge about .
    if there both going to be relatively the same work puttin them inside the car , id rather go with the ca18det due to its more power and tuning capabilities.
    any links with these kinds of discussions would be a great help
    thanks again guys

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    but if you go ca18 then your sign in name wont be right :-P

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    Member Bart's Avatar
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    Regarding legalities, both motor require engineer certificates. Check the link out and have a chat to who ever is closest to you about making it all legal. Thats what i did to make mine 100% legal.

    http://www.rta.nsw.gov.au/registrati...4_nov_2008.pdf

  • #7
    Senior Member ThatsHowWeRoll's Avatar
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    yep talk to an engineer....20 valve would most likey be easier to engineer....

    Make sure brakes and other such thing are safe and sufficient for the power upgrade...and simple things like emissions, filter position etc....

    Most engineers appreciate quality work and a repectful driver.
    ex-SR20 Stanza and now MX83 Cressida Driver

    John 1:12

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    Veteran Golberg's Avatar
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    20 valve will definitely be easier to engineer. You could probably get away with JDM brakes and a 20 valve. You'll almost definitely need something more, brakes wise for a CA18DET conversion.

    In any event its all hearsay, you need to actually talk to engineer and find out, every engineer will have different requirements as its all up to "their" judgement.

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    Default 20v

    i have had a 4agze enginered for my 86. im in sa, When i sent away for a "aplication to modify" the road worthy dudes sent back asking for
    1. a lane change test
    2. a chassis regidity test

    both of these = MONEY! because you need to use a race track for the lane change test and a chassis testing machine.

    My enginear just wrote them a letter explaining that even though the motor is now super charged it still is a "4A" motor so it should not effect the original design of the car (eg handeling) BUT if you wack a nissan motor in you will need to get these tests to prove that the car still works safely. So i would go with the 20v just for that fact.
    Also whatever motor you put in has to be COMPLETELY stock.
    my enginear told me about a guy who had a s13 sr20 and he put a s15 turbo on it (they are pretty much the same turbo)and they made him do a emissions test because of it and he failed cost him 500 bucks for the test!!
    so stick with toyota makes life much easier
    JJ
    "my mind demands side pipes out of hear, now to command my hands to make them"

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    Senior Member squish_m8's Avatar
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    you could always boost a 20v ...

    it would be easier staying 4a, I know in SA you would be able to just change engine number at the rego office

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