05-03-2012, 02:54 AM
Personally I wouldn't go for anything bigger than a GT15/17 Hybrid. I'm not sure how the majority of you drive, but adding a bigger turbo on a HDI completely ruins the car, having to rev quite high up in the rev range just for the power band to come in and then level off almost instantly is pretty pointless, at the end of the day you drive the car on the roads, not a race track, so no point setting it up like that. My stage 3 HDI hasn't been mapped up fully yet, but I can crawl up hills in my other GT15 HDI, in a high gear with lower revs, without labouring the engine, my stage 3 one will always need much higher revs or it will struggle as the torque band is much higher up in the rev range. - Just a perspective from an owner who's been there done that.