Hey guys just a bit of a question how much more power should i get out of a 13b when it has been extend ported and dowelled, what are the disadvantages going to be?

 

porting should yield a 10% increase or better depending on how large and how well the engine is ported. that aside, i'm curious as to why you're dowelling the motor. are you running a high boost, high powered motor?

 

well yeah i do plan on running more boost a little further down the track so i figure i may as well do it while the engine is out