undergroundak
September 24th, 2013, 05:39 AM
Yo EFI live!
I have a 2011 Silverado 5.3 we swapped in a 417 LS3. Running a procharger (about 6PSI) and am getting the maf close to 12K HZ at high rpm.
I am getting erratic readings from the maf just above 5K rpm. The maf has to hit 10K HZ before it freaks out (see logs). I personally have never pushed a maf this high up in the range so I do not know what the usable accurate range for this sensor is. The tune allows adjustment up to 15K HZ and we aren't hitting the 512G/S hard limit yet either. I know the early gen5 Camaro's had some maf issues but didnt know if I was running into something similar. I've swapped MAF's and get the same results, so now I'm thinking it may just be in the usable range of the sensor even though I can tune further than the sensor itself will allow.
I wanted to get some feed back before I ran a lager MAF tube to drop the HZ.
I know You may be wondering why no S/D. The guy who owns this truck wants it to start and run exactly the same from -50 to + 85 degrees and we have 5K foot elevation changes so he could never afford paying me to get it that dialed......
Thanks,
Nick
I have a 2011 Silverado 5.3 we swapped in a 417 LS3. Running a procharger (about 6PSI) and am getting the maf close to 12K HZ at high rpm.
I am getting erratic readings from the maf just above 5K rpm. The maf has to hit 10K HZ before it freaks out (see logs). I personally have never pushed a maf this high up in the range so I do not know what the usable accurate range for this sensor is. The tune allows adjustment up to 15K HZ and we aren't hitting the 512G/S hard limit yet either. I know the early gen5 Camaro's had some maf issues but didnt know if I was running into something similar. I've swapped MAF's and get the same results, so now I'm thinking it may just be in the usable range of the sensor even though I can tune further than the sensor itself will allow.
I wanted to get some feed back before I ran a lager MAF tube to drop the HZ.
I know You may be wondering why no S/D. The guy who owns this truck wants it to start and run exactly the same from -50 to + 85 degrees and we have 5K foot elevation changes so he could never afford paying me to get it that dialed......
Thanks,
Nick