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Thread: Turbo Y4

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  1. #11
    Member Array
    Join Date
    Jun 2004
    Location
    Sydney
    Car:
    Honda Mirage
    sorry if i havent red everything but AFC for a turbo conversion sux balls.
    the amount you are going to trim away from the injector when not on boost is alot. timing will advance there. If you pull it back at the dizzy then off boost performance suffers and it really will drive like a dog. Plus AFC cannot accurately tune via load. it tunes via tps when is never a good idea with a turbocharged car. you need to tune via kpa/psi etc.\
    Ill give you an example you can go up a hill using 50% tps and it makes full boost. But you can go the same tps on flat ground at the same rpm and make no boost. So how do you trim it. Its rubbish. After all the time and moeny invested the engine is not going to last lost running on crap management and to be honest no good tuner will want to tune a boosted car using a piggyback that can only go TPS vs RPM.
    On my setup I had an AFC NEo in there from when it was NA. Keep in mind it was already in the there so I thougth lets see how shit this thing is. It didnt take long (a week) to realise its crap to tune and there no way to tune what I want when I want. So I went a standalone ECu, made a plug in loom for it and never looked back. Put timing where you want. Put fuel accurately where you want.

    You have chosen some sensible parts up until the management choice.
    Do that right and you will not have a mission in tuning the thing.

    since you got a honda just get a chipped ecu. or get some parts to chip it yourself from xenocron.
    If you use a chipped ecu you can have datalogging capabilities when will help you alot. THis is if you want to road tune the car yourself or with the help of someone else.

    An air fuel gauge alone will not be of any help in tuning the car reliably. Those air fuel gauges that run off the narrowband signal are worthless for anything other than for the ECu to run closed loop o2 to get 14.7 at cruise/low load conditions for fuel economy.
    What you need is a wideband o2 sensor kit. They will come with a controller and wideband o2 sensor at the least. Whether the controller has inbuilt datalogging depends on what you get. But If you use an ECU with datalogging capabilities you do not need to worry but the controller have such features.
    Innovate got some
    PLX
    AEM
    NGK got one
    TechEdge
    I personally use a TechEdge and it does the trick.
    Last edited by iced; 22-05-2009 at 01:03 AM.

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