So, you want to know how bad SoCal 91 Oct gas is?

[PSmalls::AnalRetentiveNumbNut]

[EdyJun]

If the CF was directly connected to the IAT or ambient temp then the CF would have to change from morning when the weather is warm and again at night when the weather is cooler. I don't see that happening. I believe that CF is the calculation that ECU has made and keeps for a period of time, like a history.

Edy

[FuelTuner]

my timing on 91 ( Shell V-Max ) oct. is as follows:
Temp: 19C
Intake Temp: 40C
CF : 6
Timing : 12.5 max

Im going to head out tonight and get some numbers on 94 Pump (with 10% Ethenol ) and tomorrow with 100 oct.

[EdyJun]

[S4intheOC]

can supplement octane. My best results have been using the Apr Race mode, 30-35% methanol mix, 91 octane with NOS Octane Booster Race formula added at fill up. Seriously, I saw between 20 - 22 deg timing on several fats runs done in close succession. Of course I wouldn't dare run the 93ish oct level gas without H20 injection on. I'm not that crazy. But, those are the highest numbers I've seen on my car, including when I was actually running 100 in the tank. It was 79deg outside.

My datalogging and experimentation with the system hasn't been as extensive as I would have liked due to work sucking away all my time, but I have gone through about 5 tanks of H2O/meth and this is my initial assesment.

When ran on either 91 or 93 octane modes, my 2+ seems to bog down at midrage RPMS, pick up, then die back off towards redline. The tailing off at the end is mainly due to the turbos running out of breath, but the intial bogging I think is due to 2 factors.
1. Most significantly, those codes aren't intended to run a bunch of timing and fail to take advantage of the added detonation resistance.
2. Because the Cooling mist kit injects the same amount all the time, it is jetted for peak HP, and gives some up on the low end.

But, throw it into race mode and its a different story. Pulls like an animal, even around 3700 where it bogged before. This assumes you're in the right gear though. The best test I've given the system yet was idling in place for 6 minutes on a 101 deg day, then driving a quarter of a mile to a freeway on ramp and nailing it. Its slow to build boost at first due to the heat soak, but as soon as it reaches 10psi, its like nitrous to the heat soaked dog. Thats when I knew it was a success. It pulled stronger than I'd ever experienced on a hot day. Until that point I'd always resisted driving the S4 on days above 90 deg. I hate feeling like I've lost 50 hp. That problem is no more.

Moral of the story, simple water injection with a bottle of yellow heet can allow the ECU to add lots of timing, as well as combating annoying heat soak.

I've still got a lot of testing to do though.

[EdyJun]

[Ah10@WMS]

[Ah10@WMS]

[S4intheOC]

Yep, here ya go. Standard 003 block. First, 100 mode with 4th gear roll 60-120. H2O/Meth on. 91+octboost. 79 deg.

(Also, to clarify, I said 10psi in my previous post because thats what the boost switch is set to on the system, didn't seem clear re-reading it tonight)

85.59 3920 61.39 18.4 33
86.49 4000 150.08 100 23.3
86.82 4200 226.75 100 3
87.22 4320 223.39 100 6
87.65 4440 221.06 100 6.8
88.07 4600 235.61 100 4.5
88.5 4680 239.53 100 6
88.94 4840 239.14 100 6.8
89.39 4960 244.64 100 6
89.83 5080 251.42 100 7.5
90.28 5200 254 100 6.8
90.74 5320 256.56 100 6.8
91.2 5440 259.11 100 8.3
91.67 5560 263.14 100 11.3
92.14 5680 264.11 100 12
92.61 5760 263.61 100 10.5
93.1 5880 265.08 100 14.3
93.58 6000 268.03 100 15.8
93.95 6040 267.56 100 15
94.44 6160 267.06 100 14.3
94.81 6200 267.56 100 15
95.31 6320 268.03 100 20.3
95.69 6400 263.89 100 20.3
96.07 6480 260.22 100 21
96.45 6520 259.53 100 18.8
96.82 6600 258.06 100 20.3
97.2 6680 259.03 100 23.3
97.69 6040 3.69 4.3 12

Second. 100 oct mode + 100 oct intank. No H2O. Temp 85 deg and about 1000 ft more altitute.
4th gear up hill (hence the long durration)

456.37 3040 166 100 6.8
456.77 3200 166.19 100 5.3
457.17 3320 166.75 100 6
457.57 3440 179.47 100 7.5
457.98 3600 182.75 100 8.3
458.38 3760 185.14 100 10.5
458.79 3880 187.28 100 8.3
459.19 4000 195.86 100 6
459.6 4120 206.22 100 6
460.01 4280 206.89 100 7.5
460.43 4400 207.92 100 8.3
460.86 4560 212.08 100 6
461.29 4680 219.25 100 7.5
461.72 4800 221.19 100 7.5
462.16 4960 227.44 100 5.3
462.61 5040 231.86 100 6.8
463.06 5200 233.89 100 2.3
463.52 5320 234.58 100 3.8
463.99 5440 240.58 100 3.8
464.45 5520 241.33 100 6
464.92 5640 242.92 100 4.5
465.4 5760 242.44 100 7.5
465.88 5880 240.97 100 6.8
466.36 5960 243.53 100 7.5
466.73 6080 240 100 9.8
467.23 6160 238.08 100 12.8
467.72 6280 235.28 100 12.8
468.22 6360 238.08 100 10.5
468.73 6440 236.67 100 12.8
469.1 6520 235.64 100 12
469.48 6600 233.33 100 15
469.98 6680 233.33 100 15.8
470.36 6760 231.97 100 18

Finally, 91 oct, 2nd and 3rd gear I believe, same elevation as first log shown, and night time 60-72 deg. This one I'm reaching into the archives since I don't do much logging on pure 91 anymore.

420.18 3520 146.33 100 14.3
420.57 3920 199.5 100 5.3
420.99 4400 211.22 100 6.8
421.42 4880 223.44 100 5.3
421.88 5360 234.25 100 10.5
422.35 5800 247.89 100 8.3
422.84 6240 253.86 100 12.8
423.22 6520 254.08 100 14.3
423.61 6920 159.36 30.2 -12
424.08 5680 53 20.4 39
424.51 4520 157.89 65.5 20.3
424.94 4720 186.33 100 10.5
425.38 4880 205.31 100 10.5
425.83 5120 226.11 100 6
426.28 5320 242.81 100 3.8
426.75 5520 239.53 100 6.8
427.22 5680 247.89 100 6
427.58 5800 249.94 100 6.8
427.94 5960 249.94 100 8.3
428.31 6080 251.42 100 7.5
428.81 6240 252.89 100 10.5
429.19 6360 250.92 100 9
429.69 6520 249.33 100 13.5
430.07 6560 179.78 72.5 2.3

Thats the best list I can compile right now. Hope you can find some interesting stuff in there. FWIW, IATs also show around 20deg cooler in quick 3rd gear runs with the system on.

Sorry that I don't know how to post spreadsheet numbers without it looking lame.