QWKSNKE
05-15-2005, 09:28 AM
Stole this from a post by Clint on the Tweecer forum. :D
1) Enter the MAF and injector slopes and offsets that will get the car running. This is usually a first guess of what the slopes and MAF curve should be. They do not need to be perfect at this point.
2) Enter cam specs and calculate the base injector timing. I would not recommend doing a WOT or heavy load pull at this point. This is just to get a base. What ever cells in the calculation are empty (N/A), I would fill in with logical numbers from surrounding cells. Again this is just to get a base injector timing table.
3) At this point the MAF and or slopes need to be dialed in. There are several approaches to do this.
3a) If you have the MAF curve from the manufacture, I would start with that, and then I would calculate the slopes using the EEC Analyzer. This is done on the "Injector Slope" dialog and not the PW vs KAMRF tab. This will get the slopes very close. After that I would fine tune the MAF with either a WB or KAMRF's. The object is to get the KAMRF's as close to 1.0 as possible if you are using a KAMRF method. If you are using a WB, the object is to get the LAMBSE's and WB readings as close as possible.
3b) If the MAF curve is unknown and the slopes are known, then you should leave the slopes alone and adjust the MAF to match the slopes. You can use either the KAMRF or WB method to do this.
3c) If the slopes and MAF are unknown then you can either adjust the MAF to match the slopes or the slopes to match the MAF. In most cases I would match the MAF to the slopes. It is easier to guess at the slopes than it is the MAF. This means that you should leave the slopes at some known value and adjust the MAF to match.
4) Now calculate the Throttle Body air flow and ISC Neutral air flow numbers.
5) Now you can do a few WOT pulls and fine tune the Injector timing.
6) I would now tackle the sea level load scaling. Run a data log through the EEC Analyzer and adjust the blue line up or down to match the red line.
The above six steps (overly simplified) have worked for me. Each car reacts differently and will require different adjustments. This is the main reason why I have not tried to publish a sequence of calculations. It is solely up to you. If I am missing some step here please jump in and add it.
Thanks Clint :D
1) Enter the MAF and injector slopes and offsets that will get the car running. This is usually a first guess of what the slopes and MAF curve should be. They do not need to be perfect at this point.
2) Enter cam specs and calculate the base injector timing. I would not recommend doing a WOT or heavy load pull at this point. This is just to get a base. What ever cells in the calculation are empty (N/A), I would fill in with logical numbers from surrounding cells. Again this is just to get a base injector timing table.
3) At this point the MAF and or slopes need to be dialed in. There are several approaches to do this.
3a) If you have the MAF curve from the manufacture, I would start with that, and then I would calculate the slopes using the EEC Analyzer. This is done on the "Injector Slope" dialog and not the PW vs KAMRF tab. This will get the slopes very close. After that I would fine tune the MAF with either a WB or KAMRF's. The object is to get the KAMRF's as close to 1.0 as possible if you are using a KAMRF method. If you are using a WB, the object is to get the LAMBSE's and WB readings as close as possible.
3b) If the MAF curve is unknown and the slopes are known, then you should leave the slopes alone and adjust the MAF to match the slopes. You can use either the KAMRF or WB method to do this.
3c) If the slopes and MAF are unknown then you can either adjust the MAF to match the slopes or the slopes to match the MAF. In most cases I would match the MAF to the slopes. It is easier to guess at the slopes than it is the MAF. This means that you should leave the slopes at some known value and adjust the MAF to match.
4) Now calculate the Throttle Body air flow and ISC Neutral air flow numbers.
5) Now you can do a few WOT pulls and fine tune the Injector timing.
6) I would now tackle the sea level load scaling. Run a data log through the EEC Analyzer and adjust the blue line up or down to match the red line.
The above six steps (overly simplified) have worked for me. Each car reacts differently and will require different adjustments. This is the main reason why I have not tried to publish a sequence of calculations. It is solely up to you. If I am missing some step here please jump in and add it.
Thanks Clint :D