REAmemiya_fan

Well the old friend google and search function wasn't much of a friend on this one, so maybe you guys can help.

I found a rebuild kit for the Hitachi HT-18 turbo, but I am unsure if it is any different between S4 and S5. I know that they had different turbine housings for the twin-scroll and independent twin-scroll, but would that effect what rebuild kit you would use?

Also, trailing from the turbo itself, when switching to the independent twin-scroll turbine housing, does the S5 manifold have to be used as well? I am assuming it does, as the flange on the housing has a different shape, but one should always be cautious right?

edit: I did just find RotaryRocket's thread on rebuilding it into a hyrbid, so that may answer some of my questions. But if you've got nothing better to do, then feel free to post

gxl90rx7

iTrader: (1)

manifold has to match the turbo series, so S4 manifold will not bolt up to S5 turbo.

both S4 and S5 use the same rebuild kit, standard T3 with 1 piece carbon compressor seal

Jimmy2222

iTrader: (3)

Different size waste gate as well.

REAmemiya_fan

The wastegate is completely different from S4 to S5. S5 has a twin compared to the sinlge 16mm of the S4.