Few questions about idle...
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Few questions about idle...
I just put in the 280s this past weekend and I have a few questions about idle.
1. What should my target idle be? 900, 1000, 1100? It seems more smooth at 1250 than anything lower.
2. What should my idle learned value be? I can't get it below 12/13.
3. Can someone explain what the idle % vs target % table is?
1. What should my target idle be? 900, 1000, 1100? It seems more smooth at 1250 than anything lower.
2. What should my idle learned value be? I can't get it below 12/13.
3. Can someone explain what the idle % vs target % table is?
I just put in the 280s this past weekend and I have a few questions about idle.
1. What should my target idle be? 900, 1000, 1100? It seems more smooth at 1250 than anything lower.
A-With my 272's and 1000 cc injectors my car is happy at 1000rpm, although I can idle it a bit leaner up around 1200.
2. What should my idle learned value be? I can't get it below 12/13.
A-You want your Idle Learned value to be as low as possible, 3-5% at warm idle
3. Can someone explain what the idle % vs target % table is?
A-The Idle % vs Target % table is where you will dial in your idle, I use the following steps to get a smooth idle;
1-Drag that small square box in the Idle Target Base table (uper right corner) to 1000rpm
2-Drag the box in the idle % vs target base table (left hand side) to where it brings the idle postion and idle base to an almost identical number (ex. my idle base is about 26.7, and my idle position is about 26.5).
Repeat these two steps at 1500 rpm, and 2000rpm, and draw a line across the idle% vs target table that intersects the three points you've made, you can apply the steps to more than 3 points if you need to hit a few more points in order to maintain a smooth idle.
The basic idea is to get the Idle Base, and the Idle % target table as close as possible, this will keep your idle learned value low.
1. What should my target idle be? 900, 1000, 1100? It seems more smooth at 1250 than anything lower.
A-With my 272's and 1000 cc injectors my car is happy at 1000rpm, although I can idle it a bit leaner up around 1200.
2. What should my idle learned value be? I can't get it below 12/13.
A-You want your Idle Learned value to be as low as possible, 3-5% at warm idle
3. Can someone explain what the idle % vs target % table is?
A-The Idle % vs Target % table is where you will dial in your idle, I use the following steps to get a smooth idle;
1-Drag that small square box in the Idle Target Base table (uper right corner) to 1000rpm
2-Drag the box in the idle % vs target base table (left hand side) to where it brings the idle postion and idle base to an almost identical number (ex. my idle base is about 26.7, and my idle position is about 26.5).
Repeat these two steps at 1500 rpm, and 2000rpm, and draw a line across the idle% vs target table that intersects the three points you've made, you can apply the steps to more than 3 points if you need to hit a few more points in order to maintain a smooth idle.
The basic idea is to get the Idle Base, and the Idle % target table as close as possible, this will keep your idle learned value low.
misadjusting the table will lead to.... the wrong idle rpm! as you raise and lower the values in that table you are opening and closing the idle air motor more or less. Ideally, the values in that table would correspond to the values needed to achieve that particular idle rpm, then the "learned value" will be a very small tweak, not a major correction. I usually set my idle target to 1500, then tune the 1500 point in the idle % vs. target table... then I change my idle target to 1300, and set that point in the other table, etc... basically, you keep changing your target idle rpm so you hit all points in that table, and for each one you move it up or down until you actually are idling at the specified rpm.
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Decepticon1225
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Jul 29, 2012 01:58 AM