SharkTuner / MAF Question
11-26-2012, 04:28 PM
#17
Rennlist Member
OK, thanks ! You can use the stock data log of MAF volts up to 5.1v and RPM against the dyno figures. I don't think you will get above that with your SMAF .....
11-26-2012, 04:35 PM
#18
Rennlist Member
That should get you what you're looking for, yes?
11-26-2012, 04:56 PM
#19
Nordschleife Master
The graph is an attempt to predict the MAF and SMAF charactristics at flow rates well in excess of what I can achive on the bench. Although the limit value of 6.1v tallys well with our rule of thumb that about about 440HP crank is the limit for a stock MAF, the predicted power values at the higher voltages are over optimistic, I believe.
I'll see if I can attach the PDF to add to the archives (NFI where I got it from - I saved from somewhere back in 2007)
11-26-2012, 07:03 PM
#20
Rennlist Member
Thanks Hilton, we already had that data, and if you look hard at the graph, the first part of the stock MAF curve is that published data, then the calculated line beyond their highest values provides the next part. Knowing the conversion law from MAF to SMAF, the SMAF graph was plotted from the MAF curve.
As Jim stated, assumptions were made about the VE of a tyical engine.
As Jim stated, assumptions were made about the VE of a tyical engine.
11-26-2012, 07:06 PM
#21
Rennlist Member
Perfect ! As you will also be logging MAF signal (abs) then you will be able to provide the data the OP asked for...
11-27-2012, 12:44 AM
#22
Racer
Thread Starter
