[Barracuda]

My pulley side seal is leaking some oil so I want to send it back for a refresh and I've been debating an upgrade as well. Currently running a 2.95 pulley and seeing around 13# but I've got the motor built and fuel system ready for more so....whatcha think? Obviously a T upgrade would probably cost considerably less I am assuming and ultimately, I would really like to make boost faster (not sure if T versus YSI makes a big diff here). My ultimate goal is to hit 600 rwhp, about 75 off where I currently stand....that way I will have no traction at all

[jivepepper]

YSI is way to much blower for only 600 rwhp you have to really spin it hard to make power at lower rpm and is a full on race blower. I made 598 out of a S-trim but I was spinning it to hard. I would consider the T or SI trim. The T loves between 600-700 rwhp. Then a JT 700-800 rwhp then finally a YSI trim 800-950+.

[White99stang]

yeah for only 600 a T trim will do the trick, a YSI is a renegade blower, its a pretty big bad mamma jamma that if you are looking for 750+ then that would be the way to go.

[Barracuda]

OK, thanks for clearing that up....reading all sorts of different thought paths on the internet. As far as making boost sooner, will the T accomplish this or is it on the lines of a Turbo meaning "larger means slower spool"? I would really like the boost to start building earlier in the rpm's if possible. Thanks