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Old 06-26-2002, 02:58 PM   #1
Chav
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Default How to set up Timing Curve?

What do most people use for their timing curve. The first map I made I had the timing go up from 1000rpm - 4500rpm then down to redline. It worked good and didnt knock. Then I redid the map and tried to stay close to the original map that came with the link. It increases the timing from 1000rpm - redline. I dont have knock with this map either, but with both maps my max timing is around 30 degrees BTDC. At WOT the first map would drop off to 26 degrees BTDC, and my second map stays at 28 degrees BTDC from 4000rpms up. All timing numbers are 10 static degrees plus map values ie 10 + 16 = 26. How do you guys do it?


-Chav
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Old 06-26-2002, 03:36 PM   #2
HndaTch627
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i wrote a timing map for another car...@ WOT you could advance up to about 26-28 degrees till redline...however i'd start pullin ga degree or 2 near redline to keep it from wanting to just bounce the limiter. you should have about 12 degrees-14 degrees @ idle and about 40 @ cruising speed.

jeremy
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Old 06-26-2002, 04:06 PM   #3
Chav
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Ok, Thank you Jeremy.

-Chav
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Old 06-26-2002, 04:42 PM   #4
Impreza Rider
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If you send me your email, I'll send you a copy of the map that I have been using in my car...

Basiclly, my timiing goes:
Row 1: up to 25 at 2500rpm all the way across
Row 2: up to 23 at 2500rpm all the way across
Row 3: up to 21 at 3000rpm all the way across
Row 4: up to 13 at 3000rpm all the way across
Row 5: up to 10 at 3500rpm all the way across
Then it drops on degree per row after that.

Just for the record, I'm running 8.5 pounds from a Legacy turbo, with stock injectors and internals. If I increase the timing more, it will just knock, and even with more fuel, it still knocks.

Let me know if you want to check it out
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Old 06-26-2002, 07:57 PM   #5
Delicious Tuning
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Impreza Rider,

I think you might want to try this.

At higher RPM's and higher MAP readings you will actually want to advance your timing a little. The reason for this is because as the RPM's rise the spark will start to fire later and later because the engine is running much faster. So to get optimal performance, you will want to advance your timing to as RPM's rise under WOT. I would say by the time you are at 6000 RPM's you will want to be at about 18 advanced, maybe more or less depending on your setup.

Of course try this slowly, but I bet you will notice a difference in your top end.

Hope that helps.

~Bill
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Old 06-26-2002, 10:36 PM   #6
Impreza Rider
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I'll give that a try. I've been hesitant to do much tuning the last week or so, because it's been about 95 degrees here, with like 70-80% humidity.
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Old 06-27-2002, 02:39 AM   #7
Chav
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Thanx Impreza Rider. I'm not boosting yet so your map wont work for me. Jeremy was your map set up for 87 octane? If it was how much more timing can I run with 93?

-Chav
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