I really love my Hachi Roku except for one thing - on Iroha it
does awesomely, but if i shift up to 4th below 87 kph (on new
engine around 10,500 RPM) it will actually LOSE speed in 4th (i.e.
go down to 86.. 85..
). I have to wait for
it to get to 88 kph which takes a very long time in 3rd. Can anyone
help me on this? Why is my hachi loosing speed? Thank you for your
help! 
oh yes - the FC and FD(type R) rock as well. very fun!