Getting ready for tomorrow's test N tune I found a major issue that needs to be addressed.
As suspected and also warned by guys who knows this trans. The 4.6L Northstar 4t80E converter is way too tight for a large turbo like a 6262.
I can barely make any boost off the line.
I didn't even think to check because of how hard the car got off the line. The front engine helps the rear get into the right RPM but right off the line, the rear engine has zero boost unless I stay full throttle on the torque converter for 5 + seconds and even then it's 4-5 psi, not nearly enough.
So we are starting right now a last minute change of the turbo setups front to back. Small turbo in the back and big turbo in front (unfortunately).
But the real solution is a looser stall in the back really... but I don't have time for that nor do I feel like taking out the trans just yet.
