05-03-2012, 10:57 AM
The K03S is a 50mm Compressor wheel, very similar to the Compressor used on the GT1749VA that's used on the PD130 and PD150 engines... The 1749VA is a 49.5mm compressor, they're good as "Stock" for about 130hp... So you can extrapolate yourself, HDi90 turbo will do 150 tops, a turbo off a 130-150 will probably do 180-190 - but IMHO, the turbine wheel on the K03S and GT17 frames etc is too small...
You're better off going for the bigger hotside (GT20+ or K04) and finding someone who knows what they're doing with mapping to make it respond properly... Half the problems with the HDis and their hydraulic lifters is due to exhaust backpressure, they use TEENY TINY turbines... Half the advantage of a Direct Injection is the fact you can produce SO much more oomph without boost, IDIs are crap with no boost, whereas DIs can produce loads of it with no boost... You may as well take advantage of this by giving it a nice big turbo, and allowing the fuel lower down...
HDis as standard are mapped SO lean in the bottom end.... You can add so much more fuel down there without smoke, HDis were designed to run smoke free in the desert when it's 40*C outside...
You're better off going for the bigger hotside (GT20+ or K04) and finding someone who knows what they're doing with mapping to make it respond properly... Half the problems with the HDis and their hydraulic lifters is due to exhaust backpressure, they use TEENY TINY turbines... Half the advantage of a Direct Injection is the fact you can produce SO much more oomph without boost, IDIs are crap with no boost, whereas DIs can produce loads of it with no boost... You may as well take advantage of this by giving it a nice big turbo, and allowing the fuel lower down...
HDis as standard are mapped SO lean in the bottom end.... You can add so much more fuel down there without smoke, HDis were designed to run smoke free in the desert when it's 40*C outside...
