Let me explain my story a little bit...
I bought the Z in December 2009 .. around November/December 2010 the car started to pull timing for no reason , I was doing dyno test with different custom mod and we couldnt figure out why the ECU was pulling timing at every pull
I tried to find the problem for over 6 months then I just let the car go like it was.
The power at 7000 was about 20whp less .
then in October 2011 , I was at the drag to look at the time I was able to get, I did quite a few pull , I was doing burnout by removing the brake fuse.
then I went home.
The next morning I saw some oil under the car
It was the tranny that was leaking.
Once at the dealership they discover the flex flywheel was badly cracked !!!
ok well they replaced it at the same time because the tranny had more problem than just a leaky oil seal.
Once I got the car back I did some pull with datalog (Uprev)
the Ign timing was perfect and where it should be !!
then I went on the dyno and gained the 20-25whp back !
this was the first story
next
after about 15 000kms I blew the VVEL . I made a post about it ,, its all good
but today was the day that I removed the engine/tranny and I discovered something !
That flywheel was badly cracked again !!!!
I blew the engine at a Time attack and I was wondering why the engine didnt pull the same as eailer this year...
I only did 3 Time Attack ,, I never had any problem in the first 2 ,, but the 3rd , the power was not there completly
The engine is only N/A .. never put any nitrous/Turbo/SC
if you think your car make less power and have that 7AT ...
take a look at the flywheel it might be the cause incase the ECU is pulling Ign Timing
EDIT ; some year error