So my build finally has come to an end ( For now.. ) and I finally got the tune cleaned up yesterday and drove around doing a full pulls here and there, and I noticed something weird..

If I put the clutch in to shift at 6500~ Rpm the car will rev up 500RPM before the RPM's drop again..?

Has anyone had this issue before.
Im thinking it might be the clutch position sensor?

Its an exedy triple disk.

 

Flywheel inertia + load you took off of it by pushing in the clutch?

 

Is that a thing? Ive never heard of it before.

 

This will likely sound stupid but are you sure you're fully getting off the throttle before you start clutching it? Try slowing down your shifting to make the pedal work very deliberate to see if it still does it.

If it does, maybe make sure the throttle isn't sticking, be it the plate itself or the pedal getting stuck on the floormat for half a second for example.

 

Yeah I thought maybe it was my error but its definitely not.. I have taken my time and fully pulled my foot off and away from the pedal multiple times to test.

 

I am almost certain that I had played with a "decel fuel cutoff" calibration in the tephra sw that delayed the fuel cut based on rpm and load. If you have access to your sw, can you look up those values?