Tip-In tuning

mrf582 · **Posted:** Sun Jun 04, 2006 1:33 am

My tip-in values are not changed from stock. Modded stock injectors programmed as 680cc and slightly adjusted stock MAF calibration. The adjustments were only up to 2.35 volts.

During tip-in the car can't maintain it's current AFR. Should I fine tune the MAF table some more so I give the car a full 25% enrichment capability. Right now the ST enrichment is already at around 8% during cruising so it only gets to adjust another 17% more to adjust. AF goes slightly lean at first to 1.16 lambda. Should I adjust Tip-In?

Current Tip-In table
17 20 24 30 36 44 52 60 68 76 84 92 99 109 119 129 139 151

Code:

Time   Engine Speed (RPM)
Air/Fuel Learning #1 (%)
Air/Fuel Correction #1 (%)
Throttle Opening Angle (%)
Mass Air Flow (g/s)Vehicle Speed (KPH)   
Engine Load (0200EE) (g)   
Rear Defogger Switch Signal (On/Off)
Air/Fuel Sensor #1 (Lambda)

0   3308   -0.78   8.59   7.06   18.39   65   0.66   1   0.97
160   3316   -0.78   8.59   7.06   18.48   65   0.66   1   0.98
330   3332   -0.78   9.38   7.06   18.71   65   0.66   1   0.98
501   3316   -0.78   7.03   7.06   18.87   65   0.66   1   0.97
651   3319   -0.78   6.25   7.06   18.72   65   0.66   1   0.97
821   3342   -0.78   7.03   7.06   18.87   65   0.66   1   0.98
981   3344   -0.78   7.81   7.06   19.04   65   0.66   1   0.98
1121   3341   -0.78   7.03   7.06   18.88   65   0.66   1   0.98
1282   3351   -0.78   5.47   22.35   38.47   65   1.22   1   0.98
1442   3307   -0.78   24.22   29.02   49.04   65   1.72   1   1.16
1612   3426   0   11.72   30.98   53.4   65   1.88   1   0.92
1782   3417   0   0   32.16   58.13   65   2   1   0.93
1933   3453   0   0   32.16   62.22   66   2.16   1   0.98
2103   3521   0   0   32.94   67.68   66   2.25   1   0.96
2273   3546   0   0   32.94   71.04   66   2.41   1   0.94
2433   3594   0   0   32.16   77.88   67   2.53   1   0.9
2594   3678   0   0   32.16   83.61   67   2.72   1   0.84
2734   3729   0   0   31.76   91.34   67   2.88   1   0.78
2874   3805   0   0   31.76   98.08   69   3.03   1   0.77
3044   3860   0   0   31.37   106.07   69   3.25   1   0.77
3194   3937   0   0   31.37   113.91   69   3.44   1   0.77
3355   4032   0   0   32.94   118.34   72   3.53   1   0.77
3525   4110   0   0   37.25   119.65   72   3.53   1   0.77
3695   4160   0   0   63.53   130.94   72   3.75   1   0.77
3855   4259   0   0   78.04   132.97   76   3.75   1   0.77
3996   4345   0   0   98.43   140.59   76   3.88   1   0.77
4136   4388   0   0   100   145.64   76   3.91   1   0.77
4276   4478   0   0   100   153.72   80   4.03   1   0.77
4446   4601   0   0   100   158.18   80   4.13   1   0.77
4596   4705   0   0   100   162.64   80   4.19   1   0.77
4767   4750   0   0   100   166.67   85   4.22   1   0.77
4937   4842   0   0   100   172.81   85   4.28   1   0.77
5107   4977   0   0   100   180.36   85   4.38   1   0.77
5247   5033   0   0   100   185.82   90   4.41   1   0.77
5408   5133   0   0   100   192.02   90   4.47   1   0.77
5548   5197   0   0   100   196.4   90   4.53   1   0.77
5708   5308   0   0   100   206.1   95   4.63   1   0.77
5878   5388   0   0   100   213.13   95   4.69   1   0.77
6029   5503   0   0   100   218.34   95   4.72   1   0.77
6199   5626   0   0   100   224.6   100   4.75   1   0.77
6369   5682   0       0   100   229.6   100   4.75   1   0.77
6539   5787   0   0   28.24   228.35   100   3   1   0.77

tmarcel · **Posted:** Thu Jun 08, 2006 1:28 pm

I guessing you've got a larger diameter intake? If so, I've found that getting the MAF scaling correct first is crucial. Try and keep the throttle as steady as possible while logging. Do this at various air flow rates. Look at your air flow in grams/sec vs what your ST correction is doing. Adjust accordingly from there.

Once you've got that down, then go to the tip-in. I'm pretty close to getting mine corrected. Now, rather than keep your TPS steady, you'll want to fluctuate in different areas (air flow), say up to 25% TPS. Watch what your AFR and your ST fuel correction are doing.

I'll try and post back what they are soon. I can tell you that I had to pull quite a bit of tip-in from up to 20% TPS.

mrf582 · **Posted:** Fri Jun 09, 2006 4:58 pm

My VF39 doesn't yet warrant a larger diameter MAF. So I am on the stock one but the values below 2.5 MAF volts have been adjusted to indicate more air flow. The modified stock injectors seem to like it like that. The rest of the MAF calibration table is stock and A/F is within .3 points of target so 10.8 vs 10.5. at WOT and high RPM/boost.

I've got the injectors programmed in as 710 but I have tried 680 and 720. Using 720 makes the A/F 11.2(actual) vs 10.5 (ECU fuel table).

So basically I just need to fine tune the MAF table better then?

tmarcel · **Posted:** Fri Jun 09, 2006 6:58 pm

mrf582 wrote:

My VF39 doesn't yet warrant a larger diameter MAF. So I am on the stock one but the values below 2.5 MAF volts have been adjusted to indicate more air flow. The modified stock injectors seem to like it like that. The rest of the MAF calibration table is stock and A/F is within .3 points of target so 10.8 vs 10.5. at WOT and high RPM/boost.

I've got the injectors programmed in as 710 but I have tried 680 and 720. Using 720 makes the A/F 11.2(actual) vs 10.5 (ECU fuel table).

So basically I just need to fine tune the MAF table better then?

I don't think you need to mess with the MAF. Who really cares what your AFR table says 10.5 or 11.5 You just need to worry what the output is (the data from the WB) and if that's what your goal is. Hopefully that makes sense?

mrf582 · **Posted:** Sun Jun 11, 2006 12:06 am

That's true.

RomRaider

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