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10deg TDC 

 

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 Post subject: 10deg TDC
Posted: Sun Feb 20, 2011 1:52 pm 
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How do you check this when the timing cover only has the TDC mark on a EL (checked 2 engines, both same).

 

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 Post subject: Re: 10deg TDC
Posted: Sun Feb 20, 2011 5:13 pm 
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el is not like ea to ed 10 deg .... el is o deg / tdc..
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 Post subject: Re: 10deg TDC
Posted: Sun Feb 20, 2011 5:41 pm 
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TROYMAN wrote:
el is not like ea to ed 10 deg .... el is o deg / tdc..
Yeh I have that one, but when setting timing isn't it better @ 10deg Before TDC?

 

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 Post subject: Re: 10deg TDC
Posted: Sun Feb 20, 2011 5:56 pm 
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no, not really...
an example... el base timing is 0 deg btdc, now say the ecu timing map at idle is 20 deg btdc.
well the ecu knows the base timing is at 0 deg, so it now adds 20 deg to get the 20 deg btdc at idle...
now if you set the base timing on the el ecu to 10 deg btdc, the ecu still thinks its at 0 deg.
so it now still adds the 20 deg at idle thinking its running at 20 deg.. but really its now at 30 deg btdc... so it will probably ping bad under load and run fairly crappy..
now you can advance it 2 deg or so to get better throttle responce but 10 is to much..

now the eb ecu base is 10 deg btdc, so the eb ecu only adds 10 deg to get the 20 deg at idle..
i hope that makes sense???
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 Post subject: Re: 10deg TDC
Posted: Sun Feb 20, 2011 6:10 pm 
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I always thort that the marking on the EL was 10deg BTDC.

 

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 Post subject: Re: 10deg TDC
Posted: Mon Feb 21, 2011 5:44 am 
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TROYMAN wrote:
no, not really...
an example... el base timing is 0 deg btdc, now say the ecu timing map at idle is 20 deg btdc.
well the ecu knows the base timing is at 0 deg, so it now adds 20 deg to get the 20 deg btdc at idle...
now if you set the base timing on the el ecu to 10 deg btdc, the ecu still thinks its at 0 deg.
so it now still adds the 20 deg at idle thinking its running at 20 deg.. but really its now at 30 deg btdc... so it will probably ping bad under load and run fairly crappy..
now you can advance it 2 deg or so to get better throttle responce but 10 is to much..

now the eb ecu base is 10 deg btdc, so the eb ecu only adds 10 deg to get the 20 deg at idle..
i hope that makes sense???

Cheers mate, clears that up nicely :)

Will grab a gun tonight and set to TDC mark.

 

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 Post subject: Re: 10deg TDC
Posted: Tue Feb 22, 2011 12:51 pm 
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Dont forget to put it into diag mode, otherwise the ECU will be constantly changing the timing while you're moving the dizzy around :P

 

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 Post subject: Re: 10deg TDC
Posted: Wed Feb 23, 2011 7:10 pm 
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I got a timing light but it's really old. When I set the timing with it (using the timing mode via shorting the end 2 pins) it's way advanced. Setting by ear seems to be ok but it will 'pink' on startup from cold.

Anyone have any ideas?

 

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 Post subject: Re: 10deg TDC
Posted: Wed Feb 23, 2011 7:23 pm 
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did you wait 2 mins after starting it with the pins bridged,as the el ecu goes into timing mode after 2 mins..

here is a vid of what it sounds like when it goes into timing mode..
http://www.youtube.com/watch?v=VJQpSyDMA2E
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 Post subject: Re: 10deg TDC
Posted: Thu Feb 24, 2011 5:34 am 
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TROYMAN wrote:
did you wait 2 mins after starting it with the pins bridged,as the el ecu goes into timing mode after 2 mins..

here is a vid of what it sounds like when it goes into timing mode..
http://www.youtube.com/watch?v=VJQpSyDMA2E

Damn, No I wasn't waiting 2 mins :(

Will have another go at it, cheers man.

(edit)
Knew I had 1 min to do so was rushing it as fast as I could, lol

 

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 Post subject: Re: 10deg TDC
Posted: Thu Feb 24, 2011 6:36 am 
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yea.. ea to ed you have to do it within the first min or so, but el you wait 2 mins then you have 2 mins to adjust it..
not many people realise including some mechanics, that the el is different..
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