Links to jcsbanks' Speed Density patches
I'm running 96530706 SD with a GM 3-bar. I seem to have my VE tuned fairly accurate. My car kind of stutters sometimes when cruising in vacuum. To me it's like it would be if it were really insanely lean, but it's not -- at the moment I'm running richer than I was with the MAS -- 15.5:1 (I was running very smooth at over 17:1 before). Also, if I step it down quickly, it shows lean for a split second, which makes my car really bad to take off with when the engine isn't warmed up.
jrohner, jcsbanks posted a thread about accel enrichment that will help you with your lean tip in. Basically you add a squirt of fuel asynchronously that correlates to tps changes.
Well, I had them set and my STFT and LTFTs were spot on, but I'm just about to change them again. I had my map row at 10, 40, 50, 70, 100, 170, 200, 408. But I am changing it to give me more resolution in my trouble area. So, I am changing it to 10 40, 50, 60, 70, 80, 120, 408. The values for load range from about 70% on the low end up to 100% at the 100-120 area and 100% at 408. I have my RPM table at 100% in the mid range, tapering down on both ends.
Once I get these new settings dialed in, I will post it up. I was also thinking that my BOV (Synchronic) may be the issue in that area, but haven't adjusted it yet to see. My logs didn't seem to point to anything as the issue.
Once I get these new settings dialed in, I will post it up. I was also thinking that my BOV (Synchronic) may be the issue in that area, but haven't adjusted it yet to see. My logs didn't seem to point to anything as the issue.
Would anyone be willing to share some base SD values for a 35r/cam'd motor with me? I'm working on a 35r equipped car with no previous MAF logs so I'd like to get a good base MAP to get me on my way quickly so that I can dive right into fine tuning rather than starting from scratch.
I fully realize that the values will need to be tweaked I just want to get right too a base map rather than starting from scratch to save me time.
Thanks
I fully realize that the values will need to be tweaked I just want to get right too a base map rather than starting from scratch to save me time.
Thanks
[QUOTE=mrfred;6744334]Updates
My bad fixed it, sorry about that.
96530706 Tephra v7t5 ROM: http://se30.dyndns.org:8080/EVO/9653...-JCSBSD3M3.zip
Tried opening this in ECU flash and got error message 'Unknown Rom Image'
Any help
Thanks
My bad fixed it, sorry about that.
96530706 Tephra v7t5 ROM: http://se30.dyndns.org:8080/EVO/9653...-JCSBSD3M3.zip
Tried opening this in ECU flash and got error message 'Unknown Rom Image'
Any help
Thanks
Last edited by golruss; Aug 15, 2009 at 05:16 PM.
For those who may have chose the SSI 3.5 bar MAP sensor.
<scaling name="SSI kPa 3.5 bar" units="kPa" toexpr="(x/3.5)-80" frexpr="(3.5*x)+280" format="%.1f" min="0" max="400" inc="1" storagetype="uint16" endian="big"/>
This started the car in the garage and got it driving around quite well. I did not boost on this. It starts/drives/idles like my Evo which is running off the well supported JDM Map sensor. So I believe this will work or if nothing else a really awesome starting point. I did the math, but did not actually "verify" by doing WOT pulls.
<scaling name="SSI kPa 3.5 bar" units="kPa" toexpr="(x/3.5)-80" frexpr="(3.5*x)+280" format="%.1f" min="0" max="400" inc="1" storagetype="uint16" endian="big"/>
This started the car in the garage and got it driving around quite well. I did not boost on this. It starts/drives/idles like my Evo which is running off the well supported JDM Map sensor. So I believe this will work or if nothing else a really awesome starting point. I did the math, but did not actually "verify" by doing WOT pulls.
IIRC you log MAP, load, and rpm. Then you might want something to compare against to see if your sitting on the same tune when you're done such as timing. Using map, load, and rpm you can verify when you have a less than 100% efficient engine and come up with the RPM ranges and approximate efficiency of your low and high RPM driving. Keep in mind that WOT and idle are stupidly easy to tune but cruise and light acceleration tend to cause greater issues.
Any pointers on how to ease that issue or driving techniques that might make it easier? Or, just drive like you normally would and log?
Edit: Is the load (%) actual load value logged in 2 byte? Or is it an actual percentage of load?
Edit: Is the load (%) actual load value logged in 2 byte? Or is it an actual percentage of load?
Last edited by lan_evo_mr9; Sep 12, 2009 at 08:03 PM.
