I have a MAfxtender and it lists the hp level for 5V at 488 rwhp. If this is true why are people maxing out at less HP levels? What I'm asking is what other factors contribute to pegging the MAF?

 

It would actually comedown to how much air is flowing through the MAF. Don't forget that a "rwhp" number tends to be a snapshot in time. Not the whole picture.

I'm seeing mostly 4.7 and sometimes 4.8V on mine w/a 4# and ported. (428/521) And that's in 80 degree weather too. I'm sure a colder and dryer day would increase that number.


Rich