Wondering if anyone knows why the stock maps have ignition advance built in to them in 4th and 5th gear. 30% in 4th and 44% in 5th gear seems like quite a bit. I can't make sense of it from an OEM point of view having to do with emissions, performance or otherwise.
Any ideas?
We're getting in to tuning our timing on a p28 D16 turbo and my tuner initially set the compensations to 0 and we're not making as much power as expected, obviously.
We don't have a good reference point of what range is safe in terms of timing now as that compensation could be worth as much as 9 degrees.
D16Y8
GT3076R
19psi
P28
stock head geometry
9:1 c.r.
Ignition tuning, stock gear based retard justification
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bsclywilly
- Posts: 7
- Joined: Sat May 30, 2009 11:02 pm
The ECU does not alter ignition timing based on gear.
I think what you are looking at is the gear compensation for the throttle tip in retard - the stock tables usually show -29% in 4th and -44% in 5th. What this means is that there is less ignition tip in retard in 4th and 5th, but the timing will be the same.
I think what you are looking at is the gear compensation for the throttle tip in retard - the stock tables usually show -29% in 4th and -44% in 5th. What this means is that there is less ignition tip in retard in 4th and 5th, but the timing will be the same.
Hondata