16-04-2013, 02:48 PM
With regards to porting even to match the gasket - I seriously wouldn't bother.
A DI Diesel PURELY uses the port to swirl air - i.e. if you change the geometry even slightly you're MORE than likely to completely cock the swirling up at the sort of engine speeds a HDi runs at causing poor mixing of the Diesel and shit combustion - i.e. lack of power, smoke, worse economy.
Leave DI Diesel heads well alone unless you seriously know what you're doing. As I've pointed out, pretty much nowhere in the UK I'd trust to *improve* a DI head...
There's so much to be had out of these engines from simpler mods - most of the time people are struggling to fit suitably sized turbos let alone port out heads.
A DI Diesel PURELY uses the port to swirl air - i.e. if you change the geometry even slightly you're MORE than likely to completely cock the swirling up at the sort of engine speeds a HDi runs at causing poor mixing of the Diesel and shit combustion - i.e. lack of power, smoke, worse economy.
Leave DI Diesel heads well alone unless you seriously know what you're doing. As I've pointed out, pretty much nowhere in the UK I'd trust to *improve* a DI head...
There's so much to be had out of these engines from simpler mods - most of the time people are struggling to fit suitably sized turbos let alone port out heads.
