Quote:
Originally Posted by puretone
by the way, some of the car-nuts I have spoken to seem to be convinced that because we have a MAF that it's pretty safe to run boosted on OEM ECU, without the need of a piggyback fueler......I have no idea what the logic is behind that but it seems to be the recurring argument that the ECU will keep adjusting for air-density (or air-mass/volume) & air-temperature thru the MAF, past normal atmosphere pressure....I wonder if it's just like running the 5SFE on the stock MAP, and how it stays "safe" (read: not go into limp-mode) below 8psi.
Any suggestions/comments from you geeks?
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Well it's pretty well true... But just depends on the upper limits that the standard ECU has a 'map' for.
You need to remember that 'normal' atmospheric pressure isnt always the same. Toyota has to account for all situations, whether driving up a mountain, or when there's a high pressure weather system coming through and you're at sea level.
They'll definitely have 'mapped' the how much fuel is required for X amount of air that is more than 'normal' but it's only speculation to say where that point is, without testing it.
I wouldnt be willing to bet a motor that it can take 10psi, hahaha.