Originally Posted by charles charlie
Forgive my ignorance on this as I never see many dyno charts, but doesnt that show these turbos are down on both torque and power until only after 4700 rpm?
To me that looks like worse than OEM for all road situations unless you are on full OWT and looking to go to the redline. Wouldnt that mean you're actually running less than OEM turbos for probably 80-90% of driving situations?
I personally wouldnt want extra up top for such a reduction down below. Maybe more grunt mid range is a better result no?
Apologies if I've read the graph wrong btw!
You have not read the graph wrong but its only down to 4200rpm.. after this point it is the same or more....but as said above it is running less boost compared to the stock turbos at below 4000rp as i wanted to achieve as close to a flat torque curve from 4000-7000rpm as possible.
Also too much torque low down running close to the Knock limit is a killer on the Rods for these engines as it only takes one large ping of knock at this point in the combustion chamber where the cylinder pressures are at there highest and you have done damage so with new parts like this data is taken... overserved and then put into the application next time i have some free time on the dyno.
Accelerating hard though and under no up shift does it drop below 4200rpm so the car feels a fair bit faster with all the extra torque.