I just got a new reman alternator installed. Tried to get my 00 integra b18c1 turbo has stock ctr harmonic balancer, dyno. At idle alternator is pushing out fine at 14v but once it hits 6k rpm jumps to 18v. Tuner said either try a new stock b18 harmonic balancer, ati damper, or bigger alternator pulley. What do you guys think it is?

 

If it is getting to 18V, the alternator's voltage regulator is faulty.