What the stock 75 TS Motronic can and cannot do. - Page 55 - Alfa Romeo Bulletin Board & Forums

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post #811 of 815 (permalink) Old 08-25-2015, 08:48 AM
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WOT Ignition Comparison

Anyone who is still working on this, I find the following a bit odd in the data.

The 160s bin, compared with the 191 bin, looks as follows in the ignition graph.

160s looks good to me (but this is the modified version from Festy) However, when you compare 160 to 191 the stock ignition timing for WOT, is significantly retarding timing a LOT, so why is this the case in the 'stock' map? I would expect maybe 4 or 5 degree's of advance removed in the stock map, not 20 degree's or more!?
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post #812 of 815 (permalink) Old 11-02-2015, 06:39 AM
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Quote:
Originally Posted by IanB View Post
Anyone who is still working on this, I find the following a bit odd in the data.

The 160s bin, compared with the 191 bin, looks as follows in the ignition graph.

160s looks good to me (but this is the modified version from Festy) However, when you compare 160 to 191 the stock ignition timing for WOT, is significantly retarding timing a LOT, so why is this the case in the 'stock' map? I would expect maybe 4 or 5 degree's of advance removed in the stock map, not 20 degree's or more!?
That's pretty typical. From cruise at part throttle to full throttle almost all engines pull out timing. A lot of cars pull out 20 degrees, some pull out 40!

Greg
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post #813 of 815 (permalink) Old 06-15-2016, 12:58 AM
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IanB
You just trying to read different bins with the same .xdf.
You MUST use 160s.bin with the 160s.xdf
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post #814 of 815 (permalink) Old 06-15-2016, 12:58 AM
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Miss Festy. Absolutely stunning topic.
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post #815 of 815 (permalink) Old 06-15-2016, 11:10 AM
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Nice work Thottbot in finding my mistake, now it makes sense
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