205 Gti stock ECU and ignition - how good is it?
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  1. #1
    Fellow Frogger! chez00's Avatar
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    Default 205 Gti stock ECU and ignition - how good is it?

    Hi,

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    I'm pretty keen to up the compression ratio through a DFZ bottom end/DKZ head combo, and probably a longer duration cam. I suspect the standard ECU on my S1 205 is not going to be heavily affected by an increase in compression but may be wrong (any one have experience here?), however am a little worried about the dicky nature of the stupid air flow meter flap.

    In short I'm wondering if anyone has run a DFZ/DKZ with stock ecu and ignition successfully? If not, what gear have you used to make it work? I'm guessing spark timing will be the real issue in the battle against ping.

    Cheers

  2. #2
    Fellow Frogger! DjB8V's Avatar
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    Yes.

    I can send you or show video footage of this very setup running an airflow meter on a std ECU and it's also a S1.



    Chris

  3. #3
    1000+ Posts PeterT's Avatar
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    Yes, it's very hard to stop ot pinging in the 2000-3000 range if you give it 30-32 deg full advance. You either have to retard a few degrees (and miss top end hp), modify the dizzy, or fit after market management.

    '92 205 Mi16
    '90 Mi16x4

  4. #4
    Fellow Frogger! chez00's Avatar
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    Quote Originally Posted by PeterT View Post
    You either have to retard a few degrees (and miss top end hp), modify the dizzy, or fit after market management.
    What can you do to the stock dizzy?

  5. #5
    1000+ Posts PeterT's Avatar
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    Weld up the slots (or bush the pins) so the total advance is restricted, and fit heavier springs so the rate of advance is retarded. Anyone with a distributor graphing machine will be able to do it for you.

    '92 205 Mi16
    '90 Mi16x4

  6. #6
    Fellow Frogger! chez00's Avatar
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    thanks peter I'll look into it.

    Chris, I'd be interested to see that footage.

    Cheers

  7. #7
    Fellow Frogger! four_plus_two's Avatar
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    Default Higher compression head

    I have a high compression S3 head for sale, built by PeterT, with a Stage 1 cam, if you're interested!

    It ran OK on a 1.6 block (until one of the liners cracked) but was pretty lumpy at low revs. I only put 98RON it as well.

    In reality you need to fit aftermarket management onto a high-comp 8v to do it justice. Considering the Haltech entry level range is now under $1k retail, it's not a huge expense if you are after *reliable* performance. You can go down the Megasquirt route as well if that's your thing, being much cheaper than commercial ECUs. I personally think the Jetronic system is well past its use-by date!

    Quote Originally Posted by chez00 View Post
    thanks peter I'll look into it.

    Chris, I'd be interested to see that footage.

    Cheers

    2005 Renault Clio Sport 182 Cup
    1983 Peugeot 505 SRDT

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