Johnyhotrod
May 13th, 2009, 10:39 AM
I tried to tune a friends 99 Ls1 that is in a street rod with a 6 psi Vortech, 42# Ford injectors, and return style fuel system.
Everything went pretty well with the VE table tune, but later the MAf tune exposed some serious problems.
Due to the proximity of the MAF to the inlet of the blower, the MAF signal is very erratic at low engine speeds, causing bucking and surging. Drives fine mafles, but cant of course go into boost....logging shows very erratic maf signal down low, and more negligible with increased airflow.
Is there anyway to "blend out" maf operation at low engine speeds/loads?
Is my only option to complete re-tune with 2002 file, and then go COS?
It works so well at heavy load and WOT, I really did not want to re-tune with a 2 bar SD.
Thanks for the help.
Everything went pretty well with the VE table tune, but later the MAf tune exposed some serious problems.
Due to the proximity of the MAF to the inlet of the blower, the MAF signal is very erratic at low engine speeds, causing bucking and surging. Drives fine mafles, but cant of course go into boost....logging shows very erratic maf signal down low, and more negligible with increased airflow.
Is there anyway to "blend out" maf operation at low engine speeds/loads?
Is my only option to complete re-tune with 2002 file, and then go COS?
It works so well at heavy load and WOT, I really did not want to re-tune with a 2 bar SD.
Thanks for the help.