AFM question
11-22-05, 05:51 PM
#7
RX-7 Alumni
Originally Posted by slpin
the software itself wont do it, need the physical unit itself to support it... and that is... more money :/
If you have the MS-I v3.0 board it is at most another $10 to run full 2nd gen ignition--knowing what timing to run is another story. If you have the v2.2 board add another $5 since you'll need another CAS Vr circuit.
And yes that also means you won't need the AFM anymore. Faking out the ECU to attempt to get good ignition timing will lead to poor running. Either leave the AFM in and use the stock ECU for timing or go over to full Megasquirt control.
I have my car running with MegaSquirt fuel right now with the stock ECU controlling spark and emissions. Almost done tuning the fuel map. Soon I'll start running ignition and emissions. I did have to build two extra output circuits for the emission control solenoids--again, we're talking a few dollars here. I didn't even spend the $20 on a nice Error* daughter board, I used a $4 IC prototype board--fits perfect in the stock ECU case. For EGT circuit, electronic boost control circuit, 2 solenoid circuits, and one CAS vr circuit it cost about $40 including the board--uhh batterys not included.
Here's what it looks like:
Oh yea, the one in the picture is in the fuel piggyback mode. Once I go full MS, the stock ECU connectors will go in and the pigtails connections you see will be gone!
Scott
Last edited by Rex4Life; 11-22-05 at 05:54 PM.
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11-22-05, 06:41 PM
#8
Originally Posted by Rex4Life
Whadda-ya mean slpin, you know better than that? The Megasquirt N Spark Extra software and hardware will fully support both leading and trailing ignition for all 2nd gens.
If you have the MS-I v3.0 board it is at most another $10 to run full 2nd gen ignition--knowing what timing to run is another story. If you have the v2.2 board add another $5 since you'll need another CAS Vr circuit.
And yes that also means you won't need the AFM anymore. Faking out the ECU to attempt to get good ignition timing will lead to poor running. Either leave the AFM in and use the stock ECU for timing or go over to full Megasquirt control.
I have my car running with MegaSquirt fuel right now with the stock ECU controlling spark and emissions. Almost done tuning the fuel map. Soon I'll start running ignition and emissions. I did have to build two extra output circuits for the emission control solenoids--again, we're talking a few dollars here. I didn't even spend the $20 on a nice Error* daughter board, I used a $4 IC prototype board--fits perfect in the stock ECU case. For EGT circuit, electronic boost control circuit, 2 solenoid circuits, and one CAS vr circuit it cost about $40 including the board--uhh batterys not included.
Here's what it looks like:
Oh yea, the one in the picture is in the fuel piggyback mode. Once I go full MS, the stock ECU connectors will go in and the pigtails connections you see will be gone!
Scott
If you have the MS-I v3.0 board it is at most another $10 to run full 2nd gen ignition--knowing what timing to run is another story. If you have the v2.2 board add another $5 since you'll need another CAS Vr circuit.
And yes that also means you won't need the AFM anymore. Faking out the ECU to attempt to get good ignition timing will lead to poor running. Either leave the AFM in and use the stock ECU for timing or go over to full Megasquirt control.
I have my car running with MegaSquirt fuel right now with the stock ECU controlling spark and emissions. Almost done tuning the fuel map. Soon I'll start running ignition and emissions. I did have to build two extra output circuits for the emission control solenoids--again, we're talking a few dollars here. I didn't even spend the $20 on a nice Error* daughter board, I used a $4 IC prototype board--fits perfect in the stock ECU case. For EGT circuit, electronic boost control circuit, 2 solenoid circuits, and one CAS vr circuit it cost about $40 including the board--uhh batterys not included.
Here's what it looks like:
Oh yea, the one in the picture is in the fuel piggyback mode. Once I go full MS, the stock ECU connectors will go in and the pigtails connections you see will be gone!
Scott
btw, how does your idle map look like...
mine is pretty driveable and drives nicely, but it just doesnt idle too good....
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2nd Generation Specific (1986-1992)
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