boostisgood
Member
- :
- 1988 FC3S TII
Anyone know if the speed computer is a closed loop setup at WOT ?
its short, simple, and to the point
its short, simple, and to the point
The Spedd computer
- Thread starter boostisgood
- Start date
Limited Edition
Member
I wish i could help, but i have NO idea what you mean?.
Actually, i don't know what a close loop set up is at WOT?
explian.
Actually, i don't know what a close loop set up is at WOT?
explian.
boostisgood
Member
- :
- 1988 FC3S TII
WOT = Wide Open Throttle.
Closed loop is when the omputer does not take any data from any sensors, just relies on a pre programmed fuel map, usually occuring at Wide Open Throttle.
Closed loop is when the omputer does not take any data from any sensors, just relies on a pre programmed fuel map, usually occuring at Wide Open Throttle.
Hmm, I always thought that closed loop was when it watched the oxygen sensor to vary the A/F ratios. Open loop is when it goes to the stored map.
Word is that the MSP goes open loop (to the stored map) at 4500rpm. But that's just what I read here.
Try a search?
Word is that the MSP goes open loop (to the stored map) at 4500rpm. But that's just what I read here.
Try a search?boostisgood
Member
- :
- 1988 FC3S TII
I just confirmed that the MSP ECU goes Open loop at WOT (roughly 4 to 4500 rpm's). Basically, goes to preset fuel map, and no way around it with the stock ECU. (bang) so no Apexi S-afc workable beond 4k rpms (argh) Guess its time to look into AEM's E-Manage, unless someone has got any suggestions ? Terry ? Rishie ? Bueler ? Bueler ?
Yes, it is going into OPEN loop at WOT around 4500rpm. I'm awaiting a response back from I-Am-Chris about his E-manage, as the system is only a signal modifier much like the S-AFC, so I'm uncertain if that will work under WOT.
Personally, if none of these add-ons work, I may just throw in a Haltech. Unless there is something like the AEM which plugs right in and is quick and easy with all features of the stock ECU but the abillity to tune it myself.
Personally, if none of these add-ons work, I may just throw in a Haltech. Unless there is something like the AEM which plugs right in and is quick and easy with all features of the stock ECU but the abillity to tune it myself.
boostisgood
Member
- :
- 1988 FC3S TII
Im gonna be checkling to see if the Miata ECU harnesses are the same as the MSP. IF so, then the AEM E-Manage could work. Would just need to get the basline fuel maps for the MSP, then edit them through the AEM Software.
If anyone knows if these harnesses are the same. Please post. Im having a hard time getting the info from Madzda.
If anyone knows if these harnesses are the same. Please post. Im having a hard time getting the info from Madzda.
scapamouche
Member
It was my understanding that items like the AFC modified the signal from the fuel map to enrichen or lean out the engine. Is it actually just tricking the ecu by telling it more or less air is coming into the engine, so the ecu adds more or less fuel?!?!
The reason I ask is I thought MOST engines went into open loop at WOT, but people have gotten a decent gain in power across the board in the 2zz Celica GT-S with the AFC...
The reason I ask is I thought MOST engines went into open loop at WOT, but people have gotten a decent gain in power across the board in the 2zz Celica GT-S with the AFC...
