Fuel system SOLUTIONS...
- Thread starter LinuxRacr
- Start date
7
70
Hopefully the new stuff will fix the problems.
Yall ain't gonna believe this s***!!
Ok, while sitting at my laptop this evening, I had an epiphiny. After Tim sent me his map, and I looked at it, I decided to load it in my car just to see what happens. Now, I figured that since I have the FM voltage clamp, there may be an advantage. Now if you look at Tim's map, you notice that he has mostly 2's in his Analog map, and also has the extra injector(s) setup.
I reset the stock ECU, load up Tim's map, and start heading to work. I gave it a few minutes to get situated before romping on it. When I did romp on it, WOW!!!!(shocked) With just 2's in his analog map, I was able to hit 8-9 PSI no problem. My car was a new beast!! I did notice the J&S going off a little at 7 PSI, so I pulled some timing. Well, as expected, the stock ECU adjusted a little, but the effects were only really felt off boost, cause when in boost, the Voltage clamp, and turbo module did their jobs damn well. I had to adjust the switch point down a little, but once set, you could see the clamp, do it's thing, and then the green LED for my Turbo Module would light up, and I see the A/F ratio drop a little more.
My theory so far is that since the FM clamp didn't let the O2 sensor voltage read rich under boost, the stock ECU hasn't tried to really adjust! I may be on to something, or I could be blowing smoke up my own ass! Waiting on my extra injector setup! (thumb)
Ok, while sitting at my laptop this evening, I had an epiphiny. After Tim sent me his map, and I looked at it, I decided to load it in my car just to see what happens. Now, I figured that since I have the FM voltage clamp, there may be an advantage. Now if you look at Tim's map, you notice that he has mostly 2's in his Analog map, and also has the extra injector(s) setup.
I reset the stock ECU, load up Tim's map, and start heading to work. I gave it a few minutes to get situated before romping on it. When I did romp on it, WOW!!!!(shocked) With just 2's in his analog map, I was able to hit 8-9 PSI no problem. My car was a new beast!! I did notice the J&S going off a little at 7 PSI, so I pulled some timing. Well, as expected, the stock ECU adjusted a little, but the effects were only really felt off boost, cause when in boost, the Voltage clamp, and turbo module did their jobs damn well. I had to adjust the switch point down a little, but once set, you could see the clamp, do it's thing, and then the green LED for my Turbo Module would light up, and I see the A/F ratio drop a little more.
My theory so far is that since the FM clamp didn't let the O2 sensor voltage read rich under boost, the stock ECU hasn't tried to really adjust! I may be on to something, or I could be blowing smoke up my own ass! Waiting on my extra injector setup! (thumb)
Ok, I'm looking at my playback logs, and I've noticed that A/F ratio reading on the MPI software doesn't drop below 13.7. My wideband is reading in the 11's and 12's. Usually the TechEdge Wideband and the MPI are pretty dead on together on the reading, but it won't go below 13.7 unless the voltage clamp is off. Is this the way the FM works? Sweet! The only issue with that is that the A/F ratio readings on the datalogs wouldn't be accurate below 13.7 if my theories/findings are true.
It doesn't clamp the same. The FM clamp is basically a voltage limiter circuit. It keeps the voltage on the 1st O2 sensor below a certain point. The clamp circuit of the Turbo Module I believe just moves the voltage "sweep" range downward. The closer you are to 1 volt, the richer you are. The closer you are to 0 volt, the leaner you are. So the module circuit moves the range closer to 0 volts alowing still a pretty good sweep range for the o2 sensor.
- :
- ‘19 CX-5 GTR Tu
Wow dude..LinuxRacr said:Ok, while sitting at my laptop this evening, I had an epiphiny. After Tim sent me his map, and I looked at it, I decided to load it in my car just to see what happens. Now, I figured that since I have the FM voltage clamp, there may be an advantage. Now if you look at Tim's map, you notice that he has mostly 2's in his Analog map, and also has the extra injector(s) setup.
I reset the stock ECU, load up Tim's map, and start heading to work. I gave it a few minutes to get situated before romping on it. When I did romp on it, WOW!!!!(shocked) With just 2's in his analog map, I was able to hit 8-9 PSI no problem. My car was a new beast!! I did notice the J&S going off a little at 7 PSI, so I pulled some timing. Well, as expected, the stock ECU adjusted a little, but the effects were only really felt off boost, cause when in boost, the Voltage clamp, and turbo module did their jobs damn well. I had to adjust the switch point down a little, but once set, you could see the clamp, do it's thing, and then the green LED for my Turbo Module would light up, and I see the A/F ratio drop a little more.
My theory so far is that since the FM clamp didn't let the O2 sensor voltage read rich under boost, the stock ECU hasn't tried to really adjust! I may be on to something, or I could be blowing smoke up my own ass! Waiting on my extra injector setup! (thumb)
I am not sure..but you may be onto something..the only way to find a definet answer..is to get a voltmeter in there. And disconnect the mpi turbo module..and use the flyin proteg clamp w/ mpi tuner.
And see where the volts are at once the clamp sees boost.
Than uninstall the flyin protege clamp..and reconnect the mpi turbo module..and measure voltage..
Let me know!
Chas
Dude, I just got home from work, and let me tell you, the drive was FUN! I got the same results as last night on my way to work. I have a consistant 12-12.3 A/F ratio up to my full boost setting (8psi). It is in the 11's when I 1st hit the gas, but get up to speed nicely! I was surprised at how smooth it is! I looked down, and couldn't believe how fast I was going. BTW, I cut the MPI tuner voltage clamp wires out of the equation, and have the FM clamp in its place. I am using the FM clamp in conjucntion with the Turbo Module. Seems to be a winning combo so far! Now I just have to get my timing worked out! BTW, my PDA tool tells me that the o2 voltage is clamped at 355-365 millivolts. With the Turbo Module clamp, the voltage sweeps upwards of 800-900 millivolts (rich), and I thing the stock ECU is seeing this rich condition, and attempts to be a fuel nazi. The MPI software is still showing my stock o2 at no less than 13.7 a/f ratio when under boost. This is not good news for datalogging, but great for the tune for now I guess. (thumb)
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7
70
Well, that's interesting.
So, you are using the FM voltage clamp and the MPI turbo module to control fuel and it works well?
Hmmm, that is interesting.
So, you are using the FM voltage clamp and the MPI turbo module to control fuel and it works well?
Hmmm, that is interesting.
Damn dude, you drive like a girl!!! Lets see some logs where you're rompin on it!
I think Nick has the O2 clamped to help add fuel, so that's why it's higher in the voltage range, but I may be wrong. Good to hear it's working now. Compare my settings to what you were using so that way it will help to find where your problem was.
I think Nick has the O2 clamped to help add fuel, so that's why it's higher in the voltage range, but I may be wrong. Good to hear it's working now. Compare my settings to what you were using so that way it will help to find where your problem was.
This setup is working pretty damn well. I drove to work again tonight, and did some tuning on the timing map. I had to add some retard on the real on the midrange area. Tim, I think you would be interested in my new map, so I will post an attachment. Even with the new retard values, I still have some work to do up top, but everything is looking up!
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