dynamix

iTrader: (3)

I have heard a little about MAF voltages being maxed out and wanted to get it clear in my own mind what the max is before rescaling is needed.

On a logged run around Cadwell I was getting 4.54V but not hitting full boost on that lap - full boost normally gives me a little more.

I have to confess that I dont normally log the voltages only the calculated MAF grams/s and that tops at around 292 g/sec on a hot turbo with intake temps at ambient.

jaytc2003

iTrader: (1)

think it could be 5.1, I know it goes upto 5 anyway

dynamix

iTrader: (3)

the maximum mine has hit so far is 292 grams/sec

jaytc2003

iTrader: (1)

sure mine has hit just over 5. JollyGreenMonster is lurking anyway so he will probably be in with the answer in a minute.

Could just be your driving like a pu$$y

jaytc2003

iTrader: (1)

https://www.scoobynet.com/general-te...ax+maf+voltage

dynamix

iTrader: (3)

found this on NASOIC

Cant be right though as that would show me at hitting around 380 hp at 292 grams/sec flow ... mmm

mass(g/s)=3.5906*mafv^3-4.0038*mafv^2+2.2571*mafv-0.4089

mafv g/s lb/min hp
2.00 16.81 2.22 22
2.05 18.33 2.42 24
2.10 19.93 2.64 26
2.15 21.62 2.86 29
2.20 23.41 3.10 31
2.25 25.30 3.35 33
2.30 27.29 3.61 36
2.35 29.38 3.89 39
2.40 31.58 4.18 42
2.45 33.89 4.48 45
2.50 36.31 4.80 48
2.55 38.85 5.14 51
2.60 41.50 5.49 55
2.65 44.28 5.86 59
2.70 47.17 6.24 62
2.75 50.19 6.64 66
2.80 53.34 7.06 71
2.85 56.62 7.49 75
2.90 60.04 7.94 79
2.95 63.59 8.41 84
3.00 67.27 8.90 89
3.05 71.10 9.41 94
3.10 75.08 9.93 99
3.15 79.20 10.48 105
3.20 83.47 11.04 110
3.25 87.90 11.63 116
3.30 92.47 12.23 122
3.35 97.21 12.86 129
3.40 102.11 13.51 135
3.45 107.17 14.18 142
3.50 112.39 14.87 149
3.55 117.79 15.58 156
3.60 123.35 16.32 163
3.65 129.09 17.08 171
3.70 135.01 17.86 179
3.75 141.10 18.67 187
3.80 147.38 19.50 195
3.85 153.84 20.35 204
3.90 160.49 21.23 212
3.95 167.33 22.14 221
4.00 174.36 23.07 231
4.05 181.58 24.02 240
4.10 189.01 25.01 250
4.15 196.63 26.01 260
4.20 204.46 27.05 271
4.25 212.50 28.11 281
4.30 220.74 29.20 292
4.35 229.20 30.32 303
4.40 237.87 31.47 315
4.45 246.76 32.65 326
4.50 255.86 33.85 339
4.55 265.19 35.09 351
4.60 274.75 36.35 363
4.65 284.53 37.64 376
4.70 294.54 38.97 390
4.75 304.79 40.32 403
4.80 315.27 41.71 417
4.85 325.99 43.13 431
4.90 336.95 44.58 446
4.95 348.16 46.06 461
5.00 359.61 47.58 476
5.05 371.31 49.12 491

jaytc2003

iTrader: (1)

pick a combination of them for tonights lottery numbers

dynamix

iTrader: (3)

i know the max is 5V but ECU's are scaled for 300grams/sec as standard I believe - is it only worth rescaling once that figure is reached or a bit before?

jaytc2003

iTrader: (1)

mine is mapped for peak of 1.2bar on the way home from work I hit a max voltage of 4.965v, at a peak boost of 1.18bar at a max of 5608 revs be interested myself to see when rescaling is needed

dynamix

iTrader: (3)

based on the above table you would have 461 hp ??

jaytc2003

iTrader: (1)

it is rather nippy!!!!
mine wouldnt even be 300hp it has a vf10 turbo. Surprised it hits 1.2bar it was a struggle during mapping

jaytc2003

iTrader: (1)

Well this morning, car fully warmed up and about 20 mins into my journey (car had been warmed up beforehand as well though on the drive for 10 - 15 mins), I got 5.020v on the maf, with peak boost of 0.93 bar @ 5681 revs (third gear run)

Could this be a faulty maf on my car? (its a my93)