just finished final tuning on my mates rebuilt GTR
no real problems as such, but just a minor concern that we'd like some opinions on.
when under full throttle the acceleration doesn't seem smooth, and the engine seems to be leaning out too much, rather than running richer, as it apparently should be. this is especially up to about 3500rpm (no, its not lag), then another somewhat flat spot between 4200 - 4600rpm.
we can up the fuel with the haltech (in those areas, and others if we need to), but obviously, its using 30-40% more fuel than it should be by doing this (depending on how much it is increased).
Now, the tuner thinks this may have something to do with the injectors being slightly lazy (we sourced them from a user that had them in his 34 GTR, were 1000km old - flow fine - def not broken or anything). I know standard 34GTR injectors are different than standard 32GTR injectors, but aren't aftermarket nismo injectors universal??
Or, it may be because the haltech is being used with the standard wiring loom, and not the full haltech loom.
Now I am not a technician or mechanic myself, so I am trying to relay this message as accurately and completely as possible, to see if anyone has had similar problems.
I'll try my best to answer any questions you may have to help...
Any constructive opinions are greatly appreciated.
Regards,
Beau