That is a small T25. I would rather see you use a larger T2 series turbo or a T3. Many people that have not built a turbo car complain about perceived turbo lag. It is what it is. Personally I want a linear power band, not a useless wall of boost that results in nothing but wheel spin.it has AR 47 in the exhaust housing .
Depends on your goals. I would say a .48 or a .64 housing would work well depending on what your goals were. I personally think a GTi-R T28 is a better choice overall but they will all work and make good power if setup right with supporting mods.But what AR should the T-3 be on?
If you choose too small of a turbo it will spool too quickly and die up top. Many people who are nto familiar with turbo setups make this mistake. Even on a GTi-R T28 turbo which is a .86 T25 exhaust housing I made 8 PSI by 2900 rpms's and 14+ psi by 4000. I would go with a slightly larger turbo to have a nice linear powerband! If you chosoe too small of a turbo it will spool instantly, spin the tires, and have the turbo fall off up top.Im hoping for 200hk with cams, fuel pressure regulator and Walbro 255 fuel pump.
But the smaller the AR is on a turbo the faster it will spool up?
I want the Turbo pressure to begin on 3000rpm and go all the way out to 6800rpm that is the rev block.