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Discussion Starter · #1 · (Edited)
Well, I got the alky auto-sense working......
Just turning the alky controller on, tells the ecm it's on, and switches the
fueling, and timing when in boost tables..

So now we can run at 17:1 in highway mode, on 87 octane, the flip a switch,
and make more power then the tires can harness, in low gear.

Remember what I said about the car starting to spool the turbo, and the car
was picking up while still in N/A mode?.
Here's a gander at my latest VE table.
I've still got some work to do over 3,600 RPM, but in high gear with the
converter locked, will take a while <G>

K/Pa vs RPM
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100; RPM
0, 0, 50, 70, 96, 96, 96,104,105,110,145,160,175,180,190,210,210 400
0, 0, 50, 70, 95, 95, 95, 97,100,110,145,160,175,180,190,210,210 600
0, 0, 50, 67, 84, 86, 91, 97,110,110,150,165,175,180,190,200,200 800
0, 0, 60, 47, 84, 97,115,122,126,146,151,155,165,170,175,180,180 1000
0, 0, 47, 99, 81, 89,120,125,142,149,149,162,179,186,177,180,180 1200
0, 0, 35, 60, 81,113,125,128,144,153,159,181,177,186,201,199,185 1400
0, 0, 33, 66, 82, 99,112,124,146,154,161,180,180,192,203,206,182 1600
0, 0, 30, 66, 71, 86,110,133,149,160,169,171,196,195,211,207,192 1800
0, 0, 30, 40, 65, 90,105,123,128,143,154,172,188,192,197,193,189 2000
0, 0, 30, 40, 60, 84,100,110,121,144,144,156,178,183,185,184,184 2200
0, 0, 0, 0, 0, 0, 86,105,115,121,150,158,162,171,185,182,175 2400
0, 0, 0, 0, 0, 0, 70,100,115,120,125,145,155,165,175,178,170 2800
0, 0, 0, 0, 0, 0, 55, 85,100,115,125,141,155,160,170,170,165 3200
0, 0, 0, 0, 0, 0, 40, 80,100,115,125,141,150,160,162,165,165 3600
0, 0, 0, 0, 0, 0, 30, 75,100,115,125,141,140,155,160,160,160 4000
0, 0, 0, 0, 0, 0, 20, 60,100,115,125,141,140,155,155,155,160 4400
0, 0, 0, 0, 0, 0, 10, 50,100,115,125,141,145,145,150,155,160 4800

Note: while the above is a VE table, the entries shown are in *raw* form, ie as used in source code, to see the true VE%, multiply by 90, and divide by 255. Or if close is close enough for you, just divide by 3.


Typically at ~18 PSI even on good gas, one's limited to about 19d of timing,
and needing low 11:1 AFRs in a TR, to stay out of detonation. With the alky
on, and throttled WAY DOWN, I can run ~27d, at high 11:1 AFRs...... And
yes, Martha, this is on 87 octane.

EngRun Mph Rpm KPa Tps CtsF MatF Spkf PW WB
00:09:42 49 4125 222 100 181 90 26.8 14.19 11.8
00:09:42 50 4100 218 100 181 90 26.8 14.10 11.9
00:09:42 50 4100 222 100 181 90 26.8 14.07 11.6
00:09:42 51 4100 216 100 181 90 26.8 13.95 11.8
00:09:42 52 4100 219 100 181 90 26.8 14.16 12.1
00:09:42 52 4125 218 100 181 90 26.8 14.10 11.9
00:09:42 53 4100 221 100 181 90 26.8 14.10 11.8
00:09:42 54 4125 223 100 181 90 26.8 13.98 12.0
00:09:42 54 4150 222 100 181 90 26.8 13.98 11.9
00:09:42 55 4150 224 100 181 90 26.8 14.10 11.7
00:09:42 56 4150 222 100 181 90 26.8 14.19 11.7
00:09:42 56 4175 221 100 181 90 26.8 14.19 12.2
00:09:42 57 4175 223 100 181 90 26.8 14.10 11.7
00:09:42 58 4200 223 100 181 90 26.8 13.76 11.4
00:09:42 58 4200 222 100 181 90 26.8 14.10 11.9
00:09:42 59 4225 223 100 181 90 26.8 13.76 11.4

Now as far as cruise goes, here's a snippet of that.....
31d timing, and running ~17:1 AFRs.....
This is after the above snippet, and as you can see the MATs
dropped...............
Nothing like the cooling effect of alky <G>

EngRun Mph Rpm KPa Tps CtsF MatF Spkf PWWB
00:10:12 57 1800 66 25 180 78 31.3 3.42 17.0
00:10:12 57 1750 67 24 180 78 31.0 3.51 17.1
00:10:12 57 1800 68 25 180 78 31.0 3.51 17.1
00:10:12 57 1750 68 24 180 78 31.0 3.51 17.2
00:10:12 57 1775 67 24 180 78 31.0 3.51 17.3
00:10:12 57 1775 67 25 180 78 31.3 3.51 17.3
00:10:12 57 1775 67 24 180 78 31.3 3.51 17.0
00:10:12 57 1750 67 25 180 78 31.0 3.51 16.7
00:10:12 57 1775 67 25 180 78 31.0 3.51 17.1
00:10:12 57 1775 68 24 180 78 31.0 3.51 17.0
00:10:12 57 1775 67 25 180 78 31.0 3.51 16.9
00:10:12 57 1775 67 24 180 78 31.0 3.48 16.7
00:10:12 57 1750 67 25 180 78 31.0 3.48 17.0
00:10:12 57 1775 68 25 180 78 31.0 3.48 17.2
00:10:12 57 1775 67 25 180 78 31.0 3.51 17.3

My code (thou based on GM's), stock ecm
Alkycontrol.com
TA-62, 60 PPH injectors, 206/206 cam, Cotton F/M, THDP, modified plenum, 6 PAK coil set-up, lil ole 235/40+285/40x17s, A/C Delete, RJC race crank pulley, RJC AL waterpump pulley, Casper's Alternator voltage fix, FullThrottle Fuel pump hot wire, Cotton's Double Pumper, ATR Single Shot with added Ultraflow...
 

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Discussion Starter · #3 ·
Top Speed said:
Nice! I like the idea of an alky auto-sense. Gives you the best of both worlds!
I like the way you have that link set-up.

I'm still on the fence about closed loop WOT.....
Or any closed loop for that matter. If E85 was available around here, I'd probably make the plunge, so that I could run that, and/ or any mix of normal gas, and just let the ecm think things out....
 

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the kPa axis on your VE table only goes up to 100. Does your table stop at 100 kPa (and if so, what do you do once you are in the boost?), or is that 100% of scale? ie 100 = 300 kPa when using a 3 bar sensor.

Also, I was surprised that your max VE is only 74.5%. And that is at 1800 rpm???
A. I woulda figured it was higher, with the bigger turbo, bigger cam, all your intake improvements, etc. You've got ported heads now too don't you?
B. Why are your 3600+ rpm VEs so low? 58% and lower? That just doesn't seem right. Or are those numbers not in boost, but really at 80 kPa or whatever. If so, have you checked your VE at 15+ psi?
C. Ever checked your preturbine pressure?

John
 

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E85 does not show me much. Seems to me it is more expensive by quite a bit than normal fuel (when mileage is taken into account) altho' I have seen wide variations in the price posted. Take the government subsidy out and it goes way up.

Performancewise, it should do quite well, I would think.

Seems like that was the common fuel in Brasil when I used to go there. Or some variation of it that was principly ethanol. They also ran some buses on methane as I recall-started on gasoline and switched over, I believe.
 

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Discussion Starter · #7 ·
JDEstill said:
the kPa axis on your VE table only goes up to 100. Does your table stop at 100 kPa (and if so, what do you do once you are in the boost?), or is that 100% of scale? ie 100 = 300 kPa when using a 3 bar sensor.

Also, I was surprised that your max VE is only 74.5%. And that is at 1800 rpm???
A. I woulda figured it was higher, with the bigger turbo, bigger cam, all your intake improvements, etc. You've got ported heads now too don't you?
B. Why are your 3600+ rpm VEs so low? 58% and lower? That just doesn't seem right. Or are those numbers not in boost, but really at 80 kPa or whatever. If so, have you checked your VE at 15+ psi?
C. Ever checked your preturbine pressure?

John
At over 100 K/Pa this table takes over the fueling.
AlkyBoostBpw:
KPa/RPM
100 119 138 156 175 194 213 231 250 269 288 306;RPM
108, 108, 108, 108, 108, 98, 98, 98, 98, 88, 88, 88 ; 0
108, 108, 108, 108, 104, 98, 98, 98, 98, 88, 88, 88 ; 400
108, 108, 108, 108, 104, 98, 98, 98, 90, 88, 88, 88 ; 800
116, 116, 108, 108, 104, 104, 96, 96, 88, 88, 88, 88 ; 1200
128, 126, 124, 122, 122, 122, 124, 124, 124, 124, 124, 124 ; 1600
128, 128, 128, 128, 130, 132, 132, 132, 132, 132, 132, 132 ; 2000
128, 128, 130, 138, 140, 142, 144, 144, 144, 144, 144, 144 ; 2400
128, 132, 134, 140, 142, 146, 146, 146, 146, 146, 146, 146 ; 2800
128, 134, 136, 142, 146, 146, 148, 148, 148, 150, 150, 180 ; 3200
128, 134, 138, 142, 146, 148, 148, 150, 150, 152, 152, 180 ; 3600
128, 134, 138, 144, 148, 150, 150, 152, 152, 154, 154, 180 ; 4000
128, 134, 138, 144, 148, 150, 152, 152, 154, 154, 156, 180 ; 4400
128, 134, 138, 144, 150, 152, 154, 154, 154, 156, 158, 180 ; 4800
128, 134, 138, 146, 150, 152, 154, 154, 154, 156, 160, 180 ; 5200
128, 134, 138, 146, 150, 152, 154, 156, 156, 164, 164, 180 ; 5600
180, 180, 180, 180, 180, 180, 180, 180, 180, 180, 180, 180 ; 6000
180, 180, 180, 180, 180, 180, 180, 180, 180, 180, 180, 180 ; 6375

Stock heads, with only the chambers being smoothed out.
I had to go back to the *mule* engine, so there's nothing fancy about this one, internally.

In all honesty, I just don't worry about VE, I set the BPC so that I have alot of dynamic range in the way I can move the fuel curve around. Even with the BPW multiplier when in boost, I had to vary from what the idea code said I should run.

Eventually, I want to run a MAF, and get alot more precise about what the real VE is, but for now, I'm just happy to have the code the way I want.

And yes, there's more work to do in the boost area, but, again, things are now just to where I want them. Not to mention that I have a program to analyse a dat log, and spit out the 0-100 VE table entries.
 
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