Just burnt my first eprom chip

[90AWDTalon]

I just burnt my first eprom chip, and thought I'd share a log. I haven't done any tunning yet, needs a little work but I think I got it pretty close to start with.

TIMA TPS MAFS ERPM KNCK INJP GREV LB/MIN WB o2
2nd gear
14.00º 100.00% 2012.8 4687.50rpm 4 15.62ms 2.9375 30.43 13.2
11.00º 100.00% 2138.6 4875.00rpm 3 15.62ms 2.9375 31.65 11.6
12.00º 100.00% 2226.66 5093.75rpm 3 15.62ms 2.9375 33.06 10.87
13.00º 100.00% 2327.3 5312.50rpm 3 15.62ms 2.9375 34.49 10.72
14.00º 100.00% 2427.94 5468.75rpm 3 15.62ms 2.9375 35.5 10.72
15.00º 100.00% 2503.42 5687.50rpm 2 15.62ms 2.9375 36.92 10.72
15.00º 100.00% 2566.32 5937.50rpm 2 15.62ms 2.9375 38.54 10.72
16.00º 100.00% 2641.8 5937.50rpm 2 15.87ms 2.9375 38.54 10.72
17.00º 100.00% 2717.28 6218.75rpm 2 15.87ms 2.9375 40.37 10.72
17.00º 100.00% 2738.76 6375.00rpm 1 15.87ms 2.9375 41.38 10.72
18.00º 100.00% 2855.66 6531.25rpm 2 15.62ms 2.9 41.86 10.72
3rd gear
13.00º 100.00% 2176.34 5156.25rpm 8 15.62ms 2.9375 33.47 12.4
11.00º 100.00% 2289.56 5250.00rpm 7 15.62ms 2.9375 34.08 11.3
11.00º 100.00% 2314.72 5281.25rpm 7 15.62ms 2.9375 34.28 11
12.00º 100.00% 2377.62 5375.00rpm 7 15.62ms 2.9375 34.89 10.83
12.00º 100.00% 2390.2 5468.75rpm 7 15.62ms 2.9375 35.5 10.87
12.00º 100.00% 2453.1 5562.50rpm 6 15.62ms 2.9375 36.11 10.87
13.00º 100.00% 2453.1 5625.00rpm 6 15.62ms 2.9375 36.52 10.87
14.00º 100.00% 2503.42 5750.00rpm 6 15.62ms 2.9375 37.33 10.8
14.00º 100.00% 2541.16 5781.25rpm 7 15.62ms 2.9375 37.53 10.72
14.00º 100.00% 2566.32 5875.00rpm 7 15.62ms 2.9375 38.14 10.75
15.00º 100.00% 2604.06 5937.50rpm 6 15.87ms 2.9375 38.54 10.72
15.00º 100.00% 2654.38 6062.50rpm 6 15.87ms 2.9 38.85 10.72
16.00º 100.00% 2666.96 6125.00rpm 6 15.87ms 2.9375 39.76 10.75
16.00º 100.00% 2729.86 6187.50rpm 5 15.87ms 2.9375 40.17 10.72
16.00º 100.00% 2780.18 6312.50rpm 5 15.87ms 2.9375 40.97 10.72
15.00º 100.00% 2792.76 6375.00rpm 9 15.87ms 2.9375 41.39 10.72
16.00º 100.00% 2830.5 6406.25rpm 14 15.87ms 2.9375 41.59 10.72
14.00º 100.00% 2868.24 6562.50rpm 13 15.87ms 2.9375 42.6 10.72
14.00º 100.00% 2905.98 6625.00rpm 13 15.87ms 2.9375 43 10.72

 

[TURFNNSURF]

Keep us posted on tuning. I have a similar setup as you, with fuel and eprom and my logs at 18 to 19 psi show max timing at 17* and INJP of 15.87 also. I thought I might be missing something but maybe it's close to normal for the setup. However I have logged higher Airflow 3150Hz but still the same timing and IJNP. Keep up the good work.

 

[xcelr8n]

Is say it needs just a lil tuning to by the looks of it, everything is pretty close to where you want it, aside from top of 3rd pullin a little timing to it looks like.
Keep us posted on how it turns out..

 

[90AWDTalon]

That first log is total garbage. I made a pull on the way home from work, the injector pulse width and g/rev were identical. I looked at my code, I forgot to do the injector pulse width elimination mod.

 

[steve]

It looked that way. You can see your IPW flatline.
Is that with the EVO III turbo? The airflow looks pretty high compared to what I see with my B16G, but I don't run much boost. What boost pressure are you running?

Steve

 

[90AWDTalon]

Here's a log with the only change being injector pulse width cap elimination.

TIMA TPS MAFS ERPM KNCK INJP G/REV LB/MIN WB O2
2nd gear
27.00º 100.00% 930 4312.50rpm 0 9.22ms 1.78 16.96 14.4
19.00º 100.00% 1522 4531.25rpm 0 13.82ms 2.6 26.03 13.4
13.00º 100.00% 2088 4750.00rpm 0 16.90ms 3.2 33.6 12.48
12.00º 100.00% 2414 5031.25rpm 0 16.90ms 3.18 35.36 10.75
13.00º 100.00% 2502 5281.25rpm 0 16.90ms 3.18 37.11 10.75
14.00º 100.00% 2598 5500.00rpm 0 16.90ms 3.16 38.41 10.75
15.00º 100.00% 2640 5656.25rpm 0 16.64ms 3.11 38.87 10.75
15.00º 100.00% 2780 5937.50rpm 0 16.90ms 3.16 41.46 10.75
16.00º 100.00% 2868 6062.50rpm 0 16.90ms 3.16 42.33 10.75
17.00º 100.00% 2956 6375.00rpm 0 16.90ms 3.13 44.1 10.75
17.00º 100.00% 3044 6531.25rpm 0 16.64ms 3.08 44.46 10.75
18.00º 100.00% 3056 6843.75rpm 0 15.87ms 2.95 44.61 10.75
3rd gear
29.00º 100.00% 1156 4531.25rpm 0 9.73ms 1.92 19.23 15.3
18.00º 100.00% 1684 4906.25rpm 7 15.10ms 2.86 31.01 13.28
8.00º 100.00% 2338 4906.25rpm 14 17.15ms 3.23 35.02 11.5
7.00º 100.00% 2440 5062.50rpm 14 17.15ms 3.19 35.69 10.75
7.00º 100.00% 2426 5187.50rpm 14 17.15ms 3.23 37.03 10.75
8.00º 100.00% 2490 5281.25rpm 14 17.15ms 3.23 37.7 10.75
8.00º 100.00% 2516 5281.25rpm 13 17.41ms 3.25 37.93 10.75
8.00º 100.00% 2640 5437.50rpm 13 17.66ms 3.3 39.65 10.75
8.00º 100.00% 2678 5437.50rpm 13 17.41ms 3.28 39.41 10.75
8.00º 100.00% 2754 5593.75rpm 13 17.66ms 3.33 41.16 10.75
9.00º 100.00% 2804 5625.00rpm 12 17.66ms 3.33 41.4 10.75
10.00º 100.00% 2842 5750.00rpm 12 17.66ms 3.34 42.44 10.75
10.00º 100.00% 2956 5812.50rpm 12 17.92ms 3.375 43.35 10.75
11.00º 100.00% 2968 5906.25rpm 11 17.92ms 3.34 43.59 10.75
11.00º 100.00% 2942 6031.25rpm 11 17.41ms 3.3 43.98 10.75
11.00º 100.00% 2994 6125.00rpm 11 17.66ms 3.3 44.67 10.75
11.00º 100.00% 2994 6218.75rpm 10 17.41ms 3.27 44.94 10.75
12.00º 100.00% 3106 6281.25rpm 10 17.66ms 3.27 45.39 10.75

 

[90AWDTalon]

It looked that way. You can see your IPW flatline.
Is that with the EVO III turbo? The airflow looks pretty high compared to what I see with my B16G, but I don't run much boost. What boost pressure are you running?

Steve

Yeah thats with an EVO III @ 19psi, I was thinking that it looked pretty high also.

I need to figure out what is causing the knock between shifts and lean it out some up top. With a chip set up for 680cc and my emanage I was able to run 11.5 a/f ratio with no knock at the same boost.

 

[steve]

If my math is correct you also hitting about 90% DC at around 6300 rpm with those pulse widths.

Second gear 6375 18.8 16.9 89.78
Third gear 6281.25 19.1 17.66 92.44

I'd go out and try running 19psi to get some MAF Hz to compare to but I've only got 560s and if your numbers are correct I'd run out of fuel.

Are those real WB numbers?
I assume you tweeked the fuel maps. What was your target AFR in the maps?

Steve

 

[90AWDTalon]

Are those real WB numbers?
I assume you tweeked the fuel maps. What was your target AFR in the maps?

Steve

PLX m300 wired to the EGR temp input and logged via custom sensors in mmcd.

I used the maps provided with the extended maps guide. In that area of the map the target afr is 9.27 to 9.13

 

[steve]

Do the numbers logged match what you say on the display? There's been some discussion about voltage offset when feeding the WB to one of the ECU inputs. If 10.7:1 was correct then your running leaner than the maps and that blows any thought of any boost leaks giving those Hz.

Steve

 

[90AWDTalon]

Do the numbers logged match what you say on the display? There's been some discussion about voltage offset when feeding the WB to one of the ECU inputs. If 10.7:1 was correct then your running leaner than the maps and that blows any thought of any boost leaks giving those Hz.

Steve

The logged numbers don't match the display, I already corrected the numbers I posted to reflect that. I actually logged 11.0:1.

Are you saying that with the map I'm using I should be getting 9.13:1 instead of 10.7:1? What could cause my afr to be so far off, maf sensor, o2 sensor, or restriction in the fuel system? I'm surprised that the maps are set up so rich, I think the stock maps are even richer than the one I used. And I do have a very small boost leak at my throttle body seals.

 

[steve]

Are you saying that with the map I'm using I should be getting 9.13:1 instead of 10.7:1? What could cause my afr to be so far off, maf sensor, o2 sensor, or restriction in the fuel system?

You just named a couple. If everything was dead on you would expect the map and the wideband to be close. Since that's the whole idea. But any variance in the actual injector flow, MAF response, or leaks would cause a difference between the target map and actual AFR.

Steve

 

[90AWDTalon]

I made some more changes. I leaned out the fuel map almost 0.5:1 through out the whole map. I also took 2 degrees of timing out from 0.5 g/rev through 1.5 g/rev and 4500 rpms through 7000 rpms. This seems to have fixed the knock between shifts I was getting, the air fuel is a little leaner but still too rich. Next change will be lean out the fuel map some more and take away a little timing at the top of the rev range. I'm going to reduce my fuel pressure from 50psi to 49psi. My trims are currently low 105, mid 95, and high 99. I like to have these closer to 110.

TIMA TPS MAFS ERPM KNCK INJP G/REV LB/MIN WB O2
11.00º 100.00% 2314 4750.00rpm 0 16.64ms 3.2 33.6 11.6
12.00º 100.00% 2390 5062.50rpm 0 16.13ms 3.16 35.35 11.02
13.00º 100.00% 2464 5312.50rpm 0 16.38ms 3.17 37.21 11.02
14.00º 100.00% 2590 5500.00rpm 0 16.38ms 3.17 38.53 10.94
15.00º 100.00% 2679 5781.25rpm 0 16.38ms 3.17 40.5 11.02
15.00º 100.00% 2816 5937.50rpm 0 16.90ms 3.22 42.25 10.9
16.00º 100.00% 2904 6156.25rpm 0 16.13ms 3.17 43.13 10.9
17.00º 94.51% 3006 6406.25rpm 0 16.13ms 3.11 44.03 10.94
17.00º 69.02% 3044 6718.75rpm 0 15.10ms 2.89 42.9 10.9
19.00º 59.61% 2716 6906.25rpm 0 12.80ms 2.44 37.24 10.9
22.00º 24.71% 1496 6656.25rpm 0 1.54ms 0.61 8.97 12.39
38.00º 10.59% 200 5968.75rpm 0 1.28ms 0.13 1.71 13.88
38.00º 33.33% 100 5468.75rpm 0 5.12ms 1.16 14.02 18.97
25.00º 100.00% 1118 4625.00rpm 0 9.47ms 1.91 19.52 15.52
17.00º 100.00% 1634 4750.00rpm 0 13.82ms 2.67 28.02 14.5
12.00º 100.00% 2238 4812.50rpm 1 16.64ms 3.23 34.35 12.39
12.00º 100.00% 2338 4937.50rpm 0 16.13ms 3.14 34.26 11.13
12.00º 100.00% 2352 5062.50rpm 0 15.87ms 3.11 34.79 11.05
13.00º 100.00% 2402 5187.50rpm 0 15.87ms 3.08 35.31 11.1
14.00º 100.00% 2414 5281.25rpm 0 16.13ms 3.09 36.06 11.1
13.00º 100.00% 2502 5375.00rpm 0 16.13ms 3.13 37.18 10.98
14.00º 100.00% 2566 5437.50rpm 0 16.13ms 3.13 37.61 11.02
14.00º 100.00% 2604 5562.50rpm 0 16.13ms 3.16 38.84 10.9
14.00º 100.00% 2666 5687.50rpm 1 16.13ms 3.16 39.72 10.98
15.00º 100.00% 2728 5718.75rpm 1 16.38ms 3.19 40.31 10.98
15.00º 100.00% 2804 5875.00rpm 0 16.64ms 3.23 41.94 10.94
16.00º 100.00% 2868 5937.50rpm 0 16.90ms 3.27 42.9 10.9
16.00º 100.00% 2930 6062.50rpm 0 16.90ms 3.23 43.27 10.9
16.00º 100.00% 2956 6156.25rpm 0 16.64ms 3.2 43.54 10.9
16.00º 100.00% 3018 6250.00rpm 0 16.90ms 3.25 44.89 10.9
17.00º 100.00% 3030 6375.00rpm 7 16.38ms 3.16 44.52 10.9
14.00º 100.00% 3056 6406.25rpm 7 16.64ms 3.22 45.59 10.9
15.00º 100.00% 3018 6468.75rpm 6 16.64ms 3.19 45.6 10.9
15.00º 100.00% 3144 6562.50rpm 6 16.38ms 3.16 45.83 10.9
15.00º 100.00% 3144 6750.00rpm 6 16.13ms 3.11 46.39 10.9
17.00º 100.00% 3132 6843.75rpm 10 15.87ms 3.05 46.13 10.9
15.00º 100.00% 3094 6968.75rpm 10 15.62ms 3 46.2 10.9
15.00º 88.63% 3094 7031.25rpm 10 15.36ms 2.95 45.84 10.9

 

[90AWDTalon]

I just tried the adjustments mentioned above, the car didn't like it. Way too lean, no knock but the car was sputtering and missfiring in open loop, closed loop ran great though. AFR was between 12.1:1 and 11.9:1 for the entire pull, I'm on 92 octane so this is way to lean. I think next I'm going to leave the fuel pressure at 49psi (my trims changed to low 108, mid 100, and high 103), and go back to my unmodified fuel and timing maps and start over from there.

 

[90AWDTalon]

I went to an 1/8 drag race today. It looks like those flow numbers we thought were on the high side may be accurate, I ran a best of 7.645 seconds. I was in the 7.6-7.7 range all day, never got any knock. This was on 92 octane. Looking at the 1/4 mile list on this website that puts me at 11.5-11.8 in the 1/4. Using an ET based horse power calculator this works out to 442-409 wheel horsepower and 521-483 flywheel horsepower. This is probably way to much for the stock internals.

I'll probably be starting a new thread tomarrow on what is the best way to detune my car to save the engine.

 

[Snail Tuning]

what a/f ratio are you aiming for? im kindove new to the DSM world, but have been tuning boosted hondas for a while now. im just curiouse what you feel a good a/f ratio in a boosted DSM is?

thanks

 

[90AWDTalon]

what a/f ratio are you aiming for? im kindove new to the DSM world, but have been tuning boosted hondas for a while now. im just curiouse what you feel a good a/f ratio in a boosted DSM is?

thanks

Prior to burning my own chips, I was using a basic eprom chip and emanage. With that setup I had good success with 11.5:1, the car ran real good their. If I went any leaner it ran like crap, any richer it still ran good but not as much power according to my butt dyno. I had to retard the timing some to hit that afr, but I think it made more power at the leaner setting with lower timing.

My current state of tunning has me at 11.0:1. I'm staying here until I decide how close I am to the limits of the stock internals, and if I need to detune.

 

[1fastlaser]

what editor are your using?

 

[90AWDTalon]

what editor are your using?

TunerPro RT