Anyone use any kind of hp tuners on there hpdi motors? If so what kind and are they worth the money?
Anyone use any kind of hp tuners on there hpdi motors? If so what kind and are they worth the money?
Hydro -Tec is the only one that dyno tested their designs all others are a COPY of theirs...... most of the hp gains are at the higher rpms....Hydro tec heads are the best bang for the buck....but the best is a combination of hydro-tec parts put together as a dyno matched set for the best gains the kits are available in phase kits 1 2 and 3....
Hi performance parts or a Yamaha power head visit
Hydro-Tec's web site @ http://www.yamaha-rebuild.com/
Paul Hottman Hydro-Tec's Pro staff since 1998