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Thread: *** Disco ignition timing ***

  1. 11th December 2007, 08:36 PM #1
    jammat
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    Question *** Disco ignition timing ***

    Me again,just wondering if anyone here has a 3.9L S1 Disco on LPG and has experimented with advance settings for the ign timing,i think the factory spec is 2 degrees BTDC which in my experience seems rather retarded for a V8 engine!I am going to try mine at around 6 degrees BTDC (as long as it isn't pinging its **** off) will post the results after this weekend.
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  2. 11th December 2007, 08:38 PM #2
    jammat
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    by the way,the car is AUTO
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  3. 11th December 2007, 08:45 PM #3
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    djam1
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    Usually run mine at 14 don't run on Petrol much so don't seem much pinging
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  4. 11th December 2007, 08:52 PM #4
    jammat
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    Question

    Thanks djam but,wouldn't this much advance start melting pistons & ****?
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  5. 11th December 2007, 09:43 PM #5
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    Im sure someone wiser than I will tell us the first thing with a Rover v8 is to ensure that TDC is TDC they are very often out.
    I have run 2 engines like this without issue the performance difference between ULP and LPG seems to be minimal.
    I just make sure that it doesnt ping on Petrol seems fine.
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  6. 11th December 2007, 10:11 PM #6
    jammat
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    Smile

    cool,i hear what your saying about TRUE tdc,i will actually either eyeball it or get a long skinny probe on number 1 and double check the TDC mark before i do anything...thanks for the tip!
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  7. 11th December 2007, 11:01 PM #7
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    Quote Originally Posted by jammat View Post
    cool,i hear what your saying about TRUE tdc,i will actually either eyeball it or get a long skinny probe on number 1 and double check the TDC mark before i do anything...thanks for the tip!
    I run mine at 12 degrees BTDC, no problems or pinging, thats on petrol. Regards Frank.
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