How does the e-manage work with the stock ECU with no problems? Since the stock ECU is ODB-II compliant, it runs in closed-loop mode most of the time - since this is the case it is constantly updating the fuel maps via the oxygen and MAP sensors.....How can you get a good tune using the e-manage? To me it only seems like it will work well at WOT.....

Can anyone enlighten me?

That's how most piggy back tuning devices work. Why won't it work?

 

That's how most piggy back tuning devices work. Why won't it work?

Well, if you were running lean you can compensate by adding duty cycle to the injectors. However, if you were running rich for boost (14.7 A/F), and wanted to lean it out - which you would do by decreasing MAP sensor voltage, the ECU may attempt to compensate by dumping more fuel in (thus attempting to maintain a stoch fuel mixture)....

 

I got the greddy flash for the stock ECU (greddy turbo kit @ 7psi) and it seems to be doing the same thing. Of couse the car feels VERY powerful at WOT, but half throttle for daily driving just doesn't cut it either. I am thinking the only way around it is a profec e-01, or a k-pro... Something to tune it.

 

Well, if you were running lean you can compensate by adding duty cycle to the injectors. However, if you were running rich for boost (14.7 A/F), and wanted to lean it out - which you would do by decreasing MAP sensor voltage, the ECU may attempt to compensate by dumping more fuel in (thus attempting to maintain a stoch fuel mixture)....

Does the Honda ECU go into open loop depending on TPS or MAP signal?
I would assume that once in open loop the ECU will try to hit it's preprogrammed target values, regardless of the sensor readings. So when you are in open loop, that shouldn't be a problem, right? I think only when you are in closed-loop that's where the "issue" comes up. Can you set the TPS cross-over point in the E-manage?

 

Does the Honda ECU go into open loop depending on TPS or MAP signal?
I would assume that once in open loop the ECU will try to hit it's preprogrammed target values, regardless of the sensor readings. So when you are in open loop, that shouldn't be a problem, right? I think only when you are in closed-loop that's where the "issue" comes up. Can you set the TPS cross-over point in the E-manage?

I think its based on TPS reaching 80% maybe? Once it reaches the designated point, it moves from closed-loop operation to open-loop operation (ala pre-programmed tables). This is when its not an issue for tuning. However, when you are in closed-loop mode is when the problems might exist....

 

I think its based on TPS reaching 80% maybe? Once it reaches the designated point, it moves from closed-loop operation to open-loop operation (ala pre-programmed tables). This is when its not an issue for tuning. However, when you are in closed-loop mode is when the problems might exist....

I don't know about 80%........ That's a bit too high!

Perhaps you can change it(not sure if it an option)to cross over based on MAP signal rather than TPS. This way load will be interpreted based on pressure rather than TPS, since boost is what we are trying to tune for. I don't know too much about the E-manage system to help you. Also, if you have a good EBC that could control boost by TPS so you will only go into boost when your TPS reaches a certain load. This way you can avoid the ECU trying to tune for closed loop boost!!!!!!! 14:1 Af and high ignition advance.... Yikes!!!!!

 

Does the Honda ECU go into open loop depending on TPS or MAP signal?
I would assume that once in open loop the ECU will try to hit it's preprogrammed target values, regardless of the sensor readings. So when you are in open loop, that shouldn't be a problem, right? I think only when you are in closed-loop that's where the "issue" comes up. Can you set the TPS cross-over point in the E-manage?

The hondata K-pro ECU can crossover from closed-loop to open loop on MAP sensor settings. You can make it switchover at will at any value you like, depending on your set-up.

The problem they are having is the fact that with just the emanage and stock ECU alone, you cannot control when the ECU goes into open-loop, thus you cannot control how the ECU reads the load data and gives appropriate fuel, ingnition and cam timing. This can cause lean conditions at partial throttle, which is that hesitation you guys are talking about.....but remember this, you guys are talking about 50%+ throttle...you should not be at part throttle like that, you might as well go WOT..these are not good boost habits. This will insure that the ECU will give the appropriate amount of fuel. With the k-pro, you can have it switch over at a certain boost pressure like 80kPa, or whatever your setup demands from the ECU. This will ensure proper fuel, ignition and cam timing under boost even at partial throttle, thus making this ECU alot safer than just the emanage/stock ECU alone.

 

you can make a 02 simulator circuit which gives the ecu a value which the ecu thinks its closed loop at a set MAP voltage. That way you can add fuel without the ECU compensating the fuel. This is how one of the function of the Cybernati0n Bl4cK m4G1C...

 

you can make a 02 simulator circuit which gives the ecu a value which the ecu thinks its closed loop at a set MAP voltage. That way you can add fuel without the ECU compensating the fuel. This is how one of the function of the Cybernati0n Bl4cK m4G1C...

yeah, thats a neat trick.

 

Yeah we should have another thread just for DIY electronic circuits for our cars....

 

Simple 02 simulator circuit

Basic 02 simulator circuit...