A stage 1 & a half?!

[Mr Whippy]

My mate got his HDi mapped to a limited torque stage 2 on a K03. My stage 1 D Turbo would stick with him until 5th gear. Then he fitted an R70 fuel pump and a K03S, no added mapping and it walked from me.

Inb4 experience not what everyone on here says.

If his old turbo was not working well then it'd result in poor MAF readings and a low resultant power.

Fitting a good high spec turbo would suddenly give the higher MAF values and the fuelling would rise to what it should have been all along.

Setting any car up really needs some consideration to checking everything is working correctly first.

A 'correct' stage 2 should always be around 150bhp and 240lbft as a starting point.

Dave