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Thread: Mk1 16v Project

  1. 01-10-2009, 01:22 AM #511
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    also... dont VW motors detonate 2deg after top dead center? hence why no pre detonation?

    dom
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  2. 01-10-2009, 05:54 PM #512
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    Quote Originally Posted by WABIT View Post
    also... dont VW motors detonate 2deg after top dead center? hence why no pre detonation?

    dom
    ummm..... i sure dont understand that one. detonation/pinging is only a problem if it happens before top dead centre and before the spark. if it happens ATDC, then it wouldnt be pinging or detonation (since the pistons travelling back down), it would just be like retarded timing.
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  3. 01-10-2009, 06:43 PM #513
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    All engines ignite the charge BTDC. If you ignited it after it would be a complete dog. You need the compression to heat the charge and increase the rate of burn for a maximum power stroke. This isn't really a debate on when an engine fires though. Look up basic internal combustion theory and you'll learn about that.

    "Pre Detonation" would imply ignition before detonation.. Which doesn't really make sense. It's either "Pre ignition" or "Detonation", which is essentially the same thing with a different name, like saying "ignition advance" or "ignition lead".


    FYI, your average VW watercooled engine should run sweet with about 28-30 degrees total ignition advance.

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  4. 02-10-2009, 06:52 PM #514
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    Got a sweet Delivery from the good people (or person? ) at Robinson Automotive today!




    Oh yeah! Doesn't get any better than elring.

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  5. 02-10-2009, 07:45 PM #515
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    Quote Originally Posted by Preen59 View Post
    All engines ignite the charge BTDC.

    all aircooled VW motors ignite b/n 5 to 8 degress BTDC from memory...
    Children(VW) who have left home, among others:1966 VW 1300 Deluxe Bug(Harbour Blue)1966 VW 1300 Steel Sunroof Bug(Ruby Red), 1971 VW 1600 S Bug(White) 1972 VW 25th Ann. Bug(Avocado) 2000 VW Golf Mk IV GTI 3 door(Metallic Black Magic), 1985 VW Golf Mk 1 GLS Cabriolet (Metallic Gun Metal) Current: 1985 Mercedes Benz 280CE Coupe(Midnight Blue)
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  6. 02-10-2009, 08:12 PM #516
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    Quote Originally Posted by dubai gti View Post
    all aircooled VW motors ignite b/n 5 to 8 degress BTDC from memory...
    Yeah the air cooleds hate timing. They can't disperse the heat apparently. Dad also informed me that the later air cooleds actually did fire at about 2 degrees ATDC, but they were doing all kinds of funny things with them at that stage..

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  7. 07-10-2009, 03:51 PM #517
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    Quote Originally Posted by Preen59 View Post
    Yeah the air cooleds hate timing. They can't disperse the heat apparently. Dad also informed me that the later air cooleds actually did fire at about 2 degrees ATDC, but they were doing all kinds of funny things with them at that stage..
    there's a 356 mech next door to my work, he times them just like normal engines - 25-35 deg total advance, depending on compression/tune/cams etc.
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  8. 13-12-2009, 01:38 PM #518
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    hey
    your pistons are on order
    Can i get a hell yeah?

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  9. 13-12-2009, 01:42 PM #519
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    Quote Originally Posted by Preen59 View Post
    Can i get a hell yeah?
    hell yea!


    (about time slacker! )
    who'd you end up getting them off?


    i like volkswagens
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  10. 13-12-2009, 04:37 PM #520
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    Quote Originally Posted by Jarred View Post
    hell yea!


    (about time slacker! )
    who'd you end up getting them off?
    My good mate Sebastian from Euro Automotive sourced them through Innovative Engineering.

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