I am curious as to the pros and cons of using UnderDrive Crankshaft pulleys such as Unorthodox Racing's Ultra S or Tuner S on B Series motors ??

I keep getting mixed opinions about the Harmonic Damper, etc., etc.

Can someone explain to me what is the big deal and how exactly this poses a major problem. What are the possible consequences ?

Thanks.

 

well i have an aftermarket crank pulley installed into my gsr and there was no prblm at all wit it....my rev was quicker an ran smoothly, mayb da prblm is since the car spins quicker kus of the lighter weight change u would burn gas up jus lil bit more

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by flipldls &raquo;</TD></TR><TR><TD CLASS="quote">well i have an aftermarket crank pulley installed into my gsr and there was no prblm at all wit it....my rev was quicker an ran smoothly, mayb da prblm is since the car spins quicker kus of the lighter weight change u would burn gas up jus lil bit more</TD></TR></TABLE>

Nope.
What the harmonic balancer does is absorb vibrations from the crankshaft.
Now i believe with the aftermarket crank pulleys, its just a solid weight?
Pretty much without it it will put an extra strain on your crankshaft/oil pump gear etc etc.

 

there are mixed reviews about this.i am going to use a ati fluid damper...to take out harmonic vibrations...but i have herd some people making some very high hp..and using what you usuing and not having problems.


but best of luck to you which ever way you may go.


harv