Quote:
Originally Posted by raichean
Quoting part of my conversation with Active Autowerke:
"On N55 we’ve made about 440hp safely without additional upgrades to the fuel system (only upgraded 3.5bar tmap sensor). Anything more than that and you’ll need port injection or a piggyback. With fuel-it port injection and an Active-8, we’ve made about 530hp. Another problem at these power levels is excess heat. "
So while I don't know if I will ever change out the turbo, I feel I am well within reasonable parameters with sensible supporting upgrades like the TMAP and the diverter + that literally just arrived.
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People change the turbo to have more power top end. Majority of those gains that AA made is normally low-mid range but never top end as turbo cannot physically handle it.
I also believe AA is quoting crank HP.