While this topic might be true for pre S197 stangs, when it comes to the S197 stang its craptastic. The simple fact is that keeping the stock maf calibration will cost you HP. The CAI that use either the stock maf housing size or a reducer to meet the stock flow counts do not make the same HP as the ones that require a retune.
I know my C&L racer that has a large maf required a bit more tuning on the dyno to get the readings perfect thru out the rpm range since its so large (more then need on a stock car but with the heads/cams and more, it will help). They have proven the gains over keeping the stock unit.
Pegging the MAF and it size are two very diffrent things.
First the size matters depending on you use. If its a suck thru setup either N/A or S/Ced then size is critical. To small and you will be creating a major restriction.
On blow thru size is not as critical long as its size match the pipeing, to large or small and issue tuning it can come up.
now the maf pegging can easly be fixed with out using a new maf. The mafia will adjust it and all you do is change the table in your tune to work with the new readings. Going to a larger maf is not always the answer to a pegged maf reading. Maf size should be based on what you will be using it for and then the calibration can be done for that maf.
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07 Vista Blue GT/CS Black/Dove 5 speed manual
C&L Racer,VMPTuning, Zoomers A/B,CMCV DP's,UDP,ARH LTs & O/R Xpipe, BMR, KW Var 3, GMS LineLock
12.63 @ 109.44 321.79rwhp 338.53rwtq
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