Originally Posted by 18psi
(Post 1233522)
This will sound corny, but: it's really about creating harmony between ALL the settings to get a good idle. Then it's about smoothing everything over and dialing in enough correction and buffer zone such that extremes (high power load, cold temps, ac kicking in, fans kicking in, etc) don't disrupt the idle and are compensated for timely and efficiently.
You need proper afr You need proper timing You need to pay attention to the cells AROUND both those areas too, they affect it You need to do idle valve test to determine iacv range You need to tune CL idle control settings, PID, and dashpots You need proper AIT compensation You need proper EGO correction settings There's probably more I'm forgetting A lot of this stuff gets overlooked rpm is stable enough in my opinion but it's the vibration I want to get rid of... I will post a log when idling, maybe you guys notice something wrong. Thanks |
idle searching is very often caused by large variations between affected and surrounding cells. needs moar smoothing (but that's just a guess, I can't open your MSQ from work computer)
|
2 Attachment(s)
here you are
|
My experience with the 1.6 is that it's sensitive to injection timing at idle. You can smooth it out by changing end of injection timing in the idle area if you are sequential. Since you are batch fired you don't have that option.
|
<p>
Originally Posted by miatadaxdriver
(Post 1233547)
here you are
|
I would like to, but can't activate it right now I think...
Is this possible with MS2 firmw 3.3.3? |
I thought that was ms3 only
|
You are correct, no idle VE cells outside the normal VE map in MS2.
I don't think 3.3.3 adds that feature either, but as a 3.3.2 user I'd sure like confirmation. |
<p>no i was thinking ms3.</p>
|
too bad, it's a nice feature in my opinion
|
problem solved, bought a Link G4+ :rofl:
|
The fueling calculation is as follows:
PW = DT + (ReqFuel * MAP * VE[RPM,MAP] * AirDen * BaroCor * corrections) Forget the corrections and we get: PW = DT + (ReqFuel * MAP * VE) Rearange the formula to find VE: VE = (PW - DT)/(ReqFuel*MAP) Assume we have 265cc injectors and a deadtime of 0.8ms, a required fuel value of 5.51 and want to find the PW at 80kPa with a VE of 55%: PW = DT + (ReqFuel * MAP * VE) PW = 0.8 + (5.51 * 0.80 * 0.55) PW = 3.2244 m/s We can rearrange to find VE as below: VE = (PW - DT)/(ReqFuel*MAP) VE = (3.2244 - 0.8) / 5.51 * 0.80) VE = 0.55 Re scaling for new injectors example: We upgrade to blue 540cc injectors, an assume a Required Fuel value of 2.25, and a dead time of 0.95 If we want to re-scale the VE table for new injectors we first solve to find the current PW (3.2244m/s in our example). Then find the correction factor for the new injector. In our example using 265cc and 540cc injectors: Correction factor = Old Injector cc min / New Injector cc min Correction factor = 265 / 540 Correction factor = 0.4907 Applying this correction factor we find the new pulse width: New PW = Current PW * Correction Factor New PW = 1.58 m/s Then we calculate the NEW VE value to populate our VE table as below: New VE = (New PW - New DT)/(New ReqFuel * MAP) NEW VE = (1.58 - 0.95) / (2.25 * 0.80) New VE = 0.35 or 35% |
Originally Posted by RichieVee
(Post 1296850)
The fueling calculation is as follows:
PW = DT + (ReqFuel * MAP * VE[RPM,MAP] * AirDen * BaroCor * corrections) Forget the corrections and we get: PW = DT + (ReqFuel * MAP * VE) Rearange the formula to find VE: VE = (PW - DT)/(ReqFuel*MAP) Assume we have 265cc injectors and a deadtime of 0.8ms, a required fuel value of 5.51 and want to find the PW at 80kPa with a VE of 55%: PW = DT + (ReqFuel * MAP * VE) PW = 0.8 + (5.51 * 0.80 * 0.55) PW = 3.2244 m/s We can rearrange to find VE as below: VE = (PW - DT)/(ReqFuel*MAP) VE = (3.2244 - 0.8) / 5.51 * 0.80) VE = 0.55 Re scaling for new injectors example: We upgrade to blue 540cc injectors, an assume a Required Fuel value of 2.25, and a dead time of 0.95 If we want to re-scale the VE table for new injectors we first solve to find the current PW (3.2244m/s in our example). Then find the correction factor for the new injector. In our example using 265cc and 540cc injectors: Correction factor = Old Injector cc min / New Injector cc min Correction factor = 265 / 540 Correction factor = 0.4907 Applying this correction factor we find the new pulse width: New PW = Current PW * Correction Factor New PW = 1.58 m/s Then we calculate the NEW VE value to populate our VE table as below: New VE = (New PW - New DT)/(New ReqFuel * MAP) NEW VE = (1.58 - 0.95) / (2.25 * 0.80) New VE = 0.35 or 35% Some more stuff. I have too much time on my hands at present! I have had the wrong dead time in my MSQ for nearly 3 years. RX8 injectors. I had dead time set at 1mS. When I changed it to a "better" value of .8mS idle would go stupid lean. Not wanting to retune the whole VE, I had until now decided to just leave it at 1mS and live with it. BUT... You can use this spreadsheet that I've designed to recalibrate the VE table. I tried it, seems to work fine at idle, (the worst scenario, low pulse width). I still have to VEAL higher Pulse widths, but I think they should be pretty close hopefully. Use at your own risk, and if you don't understand why you might need it then don't use it. https://drive.google.com/open?id=1lTiwZ ... uT4rBK2EhD |
Some more stuff. I have too much time on my hands at present!
I have had the wrong dead time in my MSQ for nearly 3 years. RX8 injectors. I had dead time set at 1mS. When I changed it to a "better" value of .8mS idle would go stupid lean. Not wanting to retune the whole VE, I had until now decided to just leave it at 1mS and live with it. BUT... You can use this spreadsheet that I've designed to recalibrate the VE table. I tried it, seems to work fine at idle, (the worst scenario, low pulse width). I still have to VEAL higher Pulse widths, but I think they should be pretty close hopefully. Use at your own risk, and if you don't understand why you might need it then don't use it. https://drive.google.com/open?id=1lTiwZ ... uT4rBK2EhD |
All times are GMT -4. The time now is 07:02 PM. |
© 2024 MH Sub I, LLC dba Internet Brands