Ian0611

iTrader: (41)

Hey guys,

I've trying to work out the some cold starting issues with an Evo I just bought that's tuned on Speed Density and E85 and I came across the values below in the "SD MAT Scaling for IAT Scaling Table." These values definitely look wacky and incorrect to me. Can anyone confirm if these values are right and if not, give me the proper values? Thanks!!

P.S. I know it's a little hard to tell what's what, but basically the first number in each line is the MAT sensor ADC Volts column# and the number after the space in each line is from the degrees fahrenheit column

MAT Sensor ADC Volts Fahrenheit
0.117647059 5907.02
0.137254902 5907.02
0.156862745 5721.26
0.176470588 5397.62
0.196078431 5120.24
0.215686275 4888.94
0.235294118 4703.9
0.254901961 4518.86
0.274509804 4334
0.294117647 4195.22
0.31372549 4102.52
0.333333333 3963.92
0.352941176 3871.22
0.37254902 3732.62
0.392156863 3640.1
0.411764706 3547.58
0.431372549 3455.06
0.450980392 3362.54
0.470588235 3270.02
0.490196078 3177.5
0.509803922 3084.98
0.529411765 2992.46
0.549019608 2899.94
0.568627451 2807.42
0.588235294 2714.9
0.607843137 2622.38
0.62745098 2529.86
0.647058824 2437.34
0.666666667 2344.82
0.68627451 2252.3
0.705882353 2159.78
0.725490196 2067.26
0.764705882 1974.74
0.784313725 1882.22
0.803921569 1789.7
0.823529412 1697.18
0.843137255 1604.66
0.882352941 1512.14
0.901960784 1419.62
0.921568627 1327.1
0.960784314 1234.58
0.980392157 1142.06
1 1049.54
1.039215686 957.02
1.058823529 864.5
1.098039216 771.98
1.137254902 679.46
1.156862745 586.94
1.196078431 494.42
1.235294118 401.9
1.254901961 309.38
1.294117647 216.86
1.333333333 124.34
1.37254902 77.9
1.411764706 -14.62
1.450980392 -107.14
1.490196078 -199.66
1.529411765 -292.18
1.568627451 -384.7
1.607843137 -477.22
1.647058824 -569.74
1.68627451 -662.26
1.745098039 -754.78
1.784313725 -847.3
1.823529412 -939.82
1.882352941 -1032.34
1.921568627 -1171.3
1.960784314 -1310.08
2.019607843 -1495.3
2.058823529 -1765.3
2.117647059 31.82
2.176470588 -5481.76
2.215686275 31.82
2.254901961 -5463.76
2.31372549 57.02
2.37254902 33.08
2.431372549 33.26
2.470588235 33.44
2.549019608 33.62
2.588235294 33.8
2.647058824 33.98
2.705882353 34.16
2.745098039 34.34
2.803921569 34.52
2.862745098 34.7
2.901960784 34.88
2.960784314 35.06
3.019607843 35.24
3.058823529 35.42
3.117647059 35.6
3.176470588 35.78
3.215686275 35.96
3.254901961 36.14
3.31372549 36.32
3.37254902 36.5
3.411764706 36.68
3.450980392 36.86
3.509803922 37.04
3.549019608 37.22
3.588235294 37.4
3.647058824 37.58
3.68627451 37.76
3.725490196 37.94
3.764705882 38.12
3.803921569 38.3
3.843137255 38.48
3.882352941 38.66
3.921568627 39.02
3.960784314 39.2
3.980392157 39.38
4.019607843 39.56
4.058823529 39.74
4.098039216 40.1
4.117647059 40.28
4.156862745 40.46
4.176470588 40.82
4.215686275 41
4.235294118 41.18
4.254901961 41.54
4.294117647 41.72
4.31372549 42.08
4.333333333 42.44
4.352941176 42.62
4.37254902 42.98
4.392156863 43.34
4.411764706 43.52
4.431372549 43.88
4.450980392 44.24
4.470588235 44.6
4.490196078 44.96
4.509803922 45.32
4.529411765 45.68
4.549019608 46.04
4.568627451 46.4
4.588235294 46.76
4.607843137 47.12
4.62745098 47.48
4.647058824 48.02
4.666666667 48.38

Ian0611

iTrader: (41)

Bump. Can someone check this for me please?

Ian0611

iTrader: (41)

Bump

CDrinkH2O

iTrader: (7)

Which sensor are you using? GM IAT?

If so this is the 121 element scaling table with Volts ADC in the first column and Deg F in the second:

0.102639	302
0.112414	294.8
0.12219	287.6
0.131965	282.2
0.14174	276.8
0.156403	269.6
0.180841	258.8
0.200391	251.6
0.229717	242.6
0.254154	235.4
0.28348	228.2
0.307918	222.8
0.332356	217.4
0.361681	212
0.391007	206.6
0.42522	201.2
0.464321	195.8
0.508309	190.4
0.552297	185
0.601173	179.6
0.654936	174.2
0.694037	170.6
0.733138	167
0.777126	163.4
0.826002	159.8
0.874878	156.2
0.923754	152.6
0.977517	149
1.03617	145.4
1.09482	141.8
1.15836	138.2
1.19257	136.4
1.22678	134.6
1.261	132.8
1.29521	131
1.33431	129.2
1.36852	127.4
1.40762	125.6
1.44673	123.8
1.48583	122
1.52493	120.2
1.56403	118.4
1.60802	116.6
1.652	114.8
1.69599	113
1.73998	111.2
1.78397	109.4
1.83284	107.6
1.87683	105.8
1.92082	104
1.9697	102.2
2.01857	100.4
2.06256	98.6
2.11632	96.8
2.1652	95
2.21408	93.2
2.26295	91.4
2.31672	89.6
2.36559	87.8
2.41935	86
2.46823	84.2
2.52199	82.4
2.57576	80.6
2.62952	78.8
2.6784	77
2.73216	75.2
2.78592	73.4
2.8348	71.6
2.88856	69.8
2.94233	68
2.9912	66.2
3.04497	64.4
3.09384	62.6
3.14761	60.8
3.19648	59
3.24536	57.2
3.29423	55.4
3.34311	53.6
3.39198	51.8
3.43597	50
3.48485	48.2
3.52884	46.4
3.57771	44.6
3.6217	42.8
3.6608	41
3.70479	39.2
3.74878	37.4
3.78788	35.6
3.82209	33.8
3.86119	32
3.90029	30.2
3.93451	28.4
3.97361	26.6
4.00782	24.8
4.04203	23
4.07136	21.2
4.10068	19.4
4.1349	17.6
4.16422	15.8
4.18866	14
4.21799	12.2
4.24242	10.4
4.26686	8.6
4.2913	6.8
4.31574	5
4.34018	3.2
4.35973	1.4
4.37928	-0.4
4.39883	-2.2
4.41838	-4
4.43793	-5.8
4.45748	-7.6
4.47214	-9.4
4.50147	-13
4.53079	-16.6
4.55523	-20.2
4.57967	-23.8
4.59922	-27.4
4.61877	-31
4.63343	-34.6
4.64809	-38.2

Ian0611

iTrader: (41)

The car is supposedly tuned with the fuel temp sensor

todd6027

iTrader: (10)

change the scaling from temp scale fuel to temp scale

Ian0611

iTrader: (41)

That fixed it Thanks a bunch!!

todd6027

iTrader: (10)

leo_99

I know this is an old post but worth a shot. I am using SD 2.0 with 94172715. I have copied the above into the SD MAT Scaling for IAT scaling table. Do I also need to copy this to the MAT scaling under MAT? This was set to the TempscaleFuel. I have switched it to Tempscale. But do i leave in the values that are currently there?

MAT sensor volts start at 1.007 and go to 4.013. Is that the stock values? Should i switch this to the above?