This freaks me out. ECU Ignition Adjustments
Thread Starter
Honda-Tech Member
Joined: Mar 2003
Posts: 45
Likes: 0
This freaks me out. ECU Ignition Adjustments
Can any of you experienced tuners reassure me that this is completely normal? Cuz I gotta say this REALLY freaks me out.
Looking through the parameters trace in Neptune the only field that is active and non-zero is IAT corrections which is supposedly retarding 1 degree.
Looking through the parameters trace in Neptune the only field that is active and non-zero is IAT corrections which is supposedly retarding 1 degree.
Honda-Tech Member
Joined: Nov 2002
Posts: 3,360
Likes: 1
From: Phoenix, AZ, USA
Re: This freaks me out. ECU Ignition Adjustments
Don't forget to look at the Dwell ignition Corrections in parameters, which is needed to sync the distributor properly. That's what you're seeing.
Re: This freaks me out. ECU Ignition Adjustments
It is completely normal.
Like HR said, check out the Ignition Dwell vs RPM table .. this is what is adding in that extra timing.
Every OEM based system has this table, but not all give you access to it or allow you to log the final value.
Like HR said, check out the Ignition Dwell vs RPM table .. this is what is adding in that extra timing.
Every OEM based system has this table, but not all give you access to it or allow you to log the final value.
Thread Starter
Honda-Tech Member
Joined: Mar 2003
Posts: 45
Likes: 0
Re: This freaks me out. ECU Ignition Adjustments
Ah, yeah that's what I missed. It's not highlighted for some reason.
Is it generally recommended to leave those values as is for boosted setups?
Is it generally recommended to leave those values as is for boosted setups?
Thread Starter
Honda-Tech Member
Joined: Mar 2003
Posts: 45
Likes: 0
Re: This freaks me out. ECU Ignition Adjustments
Thanks for the reassurance!
While we're now on the topic of Dwell... Google gave me this to read: http://autoxer.skiblack.com/rayignition.html
Provided this is accurate information, should those who are using CD ignitions such as MSD adjust/eliminate the Dwell correction values from their tune? I'm using stock Honda ignition, but I'm curious.
While we're now on the topic of Dwell... Google gave me this to read: http://autoxer.skiblack.com/rayignition.html
DWELL.
Dwell is measured in degrees and is the amount of 'time' the points stay closed. When the points are closed, the coil is building up charge (inductive). When the points open the coil releases it's charge. When using a CD system, dwell becomes meaningless. This is because the CD system stores the energy [in a capacitor] and sends it to the coil when it is needed [points open]. The output of the CD system is very fast and very 'hot', thus the coil does not 'saturate' with dwell time, it just, for lack of a better phrase, "shoots it's wad" in one short, hot, burst.
Dwell is measured in degrees and is the amount of 'time' the points stay closed. When the points are closed, the coil is building up charge (inductive). When the points open the coil releases it's charge. When using a CD system, dwell becomes meaningless. This is because the CD system stores the energy [in a capacitor] and sends it to the coil when it is needed [points open]. The output of the CD system is very fast and very 'hot', thus the coil does not 'saturate' with dwell time, it just, for lack of a better phrase, "shoots it's wad" in one short, hot, burst.
Trending Topics
Thread
Thread Starter
Forum
Replies
Last Post
TauMax
Honda Civic / Del Sol (1992 - 2000)
4
Mar 21, 2005 07:42 PM
98civicEX
Forced Induction
6
Jun 20, 2002 06:09 AM