Another AFM thread
Rainman
Rennlist Member
Rennlist Member
Joined: Jan 2007
Posts: 45,852
Likes: 788
From: Nashville, TN
my hypothesis has always been that the "hop" is a result of the loooong driveshaft sort of "unwinding" as engine torque is released and it "springs back" from being slightly twisted along its length (imagine a 25mm diameter, 1.9-meter-long torsion bar)
Thread Starter
Racer
Joined: Dec 2016
Posts: 343
Likes: 134
From: Svedala, Sweden.
Took it for a drive... not the drive shaft as suggested. As soon as I touch the clutch, the hop subsides immediately drive is taken away. It is also more evident when the engine has warmed up.
Nordschleife Master
Joined: Jun 2007
Posts: 6,769
Likes: 304
From: Palm Beach, Florida
How are your engine and transmission mounts? Don’t forget the whole power train assembly (engine, torque tube and transmission) is in effect one solid piece on these cars, held in place by only three pieces of rubber.
Thread Starter
Racer
Joined: Dec 2016
Posts: 343
Likes: 134
From: Svedala, Sweden.
Thread Starter
Racer
Joined: Dec 2016
Posts: 343
Likes: 134
From: Svedala, Sweden.
Now replaced the Final ICM, and it actually drives even better now, but still some slight bunny-hop at 2000rpm and less when feathering the throttle. I have no cold or warm start issues, no idle issues, no throttle response issues... am I now just being finicky?
Thread Starter
Racer
Joined: Dec 2016
Posts: 343
Likes: 134
From: Svedala, Sweden.
I managed to replace it quite easily in that position without adjusting the metal plate... the hardest part was getting 28yrs of conductive paste unstuck! :P
